HEPData Search

The differential cross sections for the photoproduction reactions γ+p→π++n, γ+p→K++Λ0, and γ+p→K++Σ0 have ben measured for incident laboratory photon energies between 3.4 and 4.0 GeV and for meson center-of-mass angles from about 25° to 45°. The reactions were studied by observing only the charged mesons. The momenta, velocities, and angles of the mesons were measured with a magnetic spectrometer, and the equivalent of nearly monochromatic gamma rays was obtained by performing bremsstrahlung subtractions. The cross sections agree with the inequality predicted from unbroken SU(3). The measured behavior of dσdt as a function of t shows similarities to that observed in studies of mesonnucleon scattering.

6 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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High-energy, small angle, p p and anti-p p scattering and p p total cross-sections

Foley, K.J. ; Jones, R.S. ; Lindenbaum, S.J. ; et al.

Phys.Rev.Lett. 19 (1967) 857-859, 1967.

Inspire Record 51178 DOI 10.17182/hepdata.3459

None

5 data tables

Table 1

'1'.

Table 2

No description provided.

Table 3

No description provided.

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Photoproduction of neutral rho mesons from complex nuclei

Alvensleben, H. ; Becker, U. ; Bertram, W.K. ; et al.

Phys.Rev.Lett. 24 (1970) 786-792, 1970.

Inspire Record 62918 DOI 10.17182/hepdata.21623

We present results of measurements on photoproduction of ρ mesons. Analysis of 106 measured ρ events in a four-dimensional data matrix dσ(A, m, p, t⊥)dΩdm with dimensions 14×20×10×20 yields precise information on nuclear density distributions for ρ production. We obtain for the Woods-Saxon radii R(A)=(1.12±0.02)A13 and, using the vector dominance model, σρN=26.7±2.0 mb and γρ24π=0.57±0.10.

1 data table

Table 1

No description provided.

Determination of the photoproduction phase of rho0 mesons

Alvensleben, H. ; Becker, U. ; Chen, M. ; et al.

Nucl.Phys.B 25 (1971) 342-350, 1971.

Inspire Record 68820 DOI 10.17182/hepdata.33835

We have measured large-angle electron-positron pairs from the reaction γ +Be → Be+e + +e − in the e + e − invariant-mass region of 610 < m < 850 MeV/ c 2 . The phase of the photoproduction amplitude of the ϱ-meson at 4.1 – 6.1 GeV was found to deviate from pure imaginary by 11.8° ± 4.4° which corresponds to a ratio of the real to imaginary ϱ-nucleon amplitude of β = −0.2 ± 0.1.

1 data table

Table 1

No description provided.

Total cross-sections for pi- p ---> lambda k0 from threshold to 1.13 gev/c

Jones, J.J. ; Bowen, T. ; Dawes, W.R. ; et al.

Phys.Rev.Lett. 26 (1971) 860-863, 1971.

Inspire Record 69027 DOI 10.17182/hepdata.21505

Total cross sections for π−p→ΛK0 have been measured using optical spark chambers from threshold to 1.13−GeVc beam momentum in 19−MeVc intervals, but with a 1−MeVc resolution in the regions of the ΛK and ΣK thresholds. The behavior near ΛK threshold indicates a significant s-wave contribution, but this experiment is unable to resolve any cusplike behavior in the region of the ΣK thresholds. The cross section shows a broad peak in the vicinity of 1.05−GeVc beam momentum.

1 data table

Table 1

No description provided.

K0(s) k- decay of a2- produced by 20.3-gev/c pi- on hydrogen

Foley, K.J. ; Love, W.A. ; Ozaki, S. ; et al.

Phys.Rev.D 6 (1972) 747-756, 1972.

Inspire Record 73969 DOI 10.17182/hepdata.22252

We present the results of an analysis of data for the reaction π−p→KS0K−p at 20.3-GeV/c incident π momentum. We find that the K0K− effective-mass spectrum shows a single peak in the A2 region which is well fitted by a Breit-Wigner shape. The data in the A2-peak region are inconsistent with the split-A2 shape reported earlier. The distribution in t of the A2 events shows a forward dip followed by an exponential falloff. The A2 decay angular distribution is well fitted by a single resonance with quantum numbers JP=2+. The results of an analysis of the density-matrix elements for this reaction are given.

2 data tables

Table 1

CORRECTED FOR UNSEEN K0 DECAYS AND FOR BREIT-WIGNER RESONANCE TAILS.

Table 2

INCLUDING THE DENSITY MATRIX ELEMENTS OMITTED FROM THIS FIT GIVES NO SIGNIFICANT IMPROVEMENT AND THE NEW PARAMETERS ARE CLOSE TO ZERO. LIM INDICATES FITTED VALUE LIMITED FROM VARIATION BY PHYSICAL CONSTRAINTS FROM OTHER PARAMETERS.

Neutral associated production by 8, 10.7 and 15.7 gev/c pi- incident on protons

Foley, K.J. ; Love, W.A. ; Ozaki, S. ; et al.

Phys.Rev.D 8 (1973) 27-38, 1973.

Inspire Record 81979 DOI 10.17182/hepdata.22059

We present differential and total cross sections for two reactions: π−p→K0Λ and π−p→K0Σ0. The incident pion momenta were 8, 10.7, and 15.7 GeVc. The results are based on an analysis of approximately 22 600 events of the two reactions where the π+ and π− from the decay of the KS0 were detected in the forward leg of the Double Vee Magnetic Spectrometer. The separation of Λ recoils from Σ0 recoils was accomplished by the missing-mass technique.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Analysis of the q in k- d ---> k- pi- pi+ d and k- d ---> k- pi- pi+ n p(s) at 7.3 gev/c

Anderson, K.J. ; Franklin, A.D. ; Godden, G.D. ; et al.

Phys.Rev.D 6 (1972) 1823-1833, 1972.

Inspire Record 83144 DOI 10.17182/hepdata.22254

Results from the study of reactions (1) K−d→K−π−π+d and (2) K−d→K−π−π+nps at 7.3 GeV/c are presented. The interactions are dominated by the production of K*(890), ρ(765), Q(1200−1450), and D*(2200) in (1) and Δ−(1236) in (2). Observation of ρ(765) and its possible source as a misidentified K*(890) is discussed. Evidence is observed of splitting of the Q into two resonances with masses and widths (in MeV) M1=1228±21, Γ1=111±33, M2=1414±15, and Γ2=89±24, L(1775) is observed in (1). An off-shell one-pion-exchange-model calculation is compared to (2). Cross sections and branching ratios of the Q resonances are estimated on the basis of the model.

1 data table

Table 1

Q (OR K(A)) CROSS SECTIONS MODEL-DEPENDENT WITH BACKGROUND UNSUBTRACTED.

Study of k+ p ---> k0 delta++(1236), k- p ---> anti-k0 n, and k- p ---> anti-k0 delta0(1236)

Foley, K.J. ; Love, W.A. ; Ozaki, S. ; et al.

Phys.Rev.D 9 (1974) 42-48, 1974.

Inspire Record 93128 DOI 10.17182/hepdata.21955

We have studied the reactions K+p→K0Δ++(1236) at 15.7 GeVc, K−p→K¯0n at 10.7 and 15.7 GeVc, and K−p→K¯0Δ0(1236) at 15.7 GeVc in the BNL Double Vee Magnetic Spectrometer. The π+ and π− from the decays of forward K0's were detected and the above reactions were identified by a missing-mass technique. Total and differential cross sections are presented for the first two reactions and a total cross section for the third.

4 data tables

Table 1

Axis error includes +- 10/10 contribution.

Table 2

Axis error includes +- 10/10 contribution.

Table 3

Axis error includes +- 10/10 contribution.

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Proton Compton scattering at 0.55-to-4.5-gev energy and 0.12-to-1.0-(gev/c)-squared momentum transfer

Deutsch, M. ; Cleetus, K.J. ; Golub, L. ; et al.

Phys.Rev.D 8 (1973) 3828-3847, 1973.

Inspire Record 93270 DOI 10.17182/hepdata.22057

Results are presented on the elastic scattering of photons by protons. The incident photon energy ranged from 0.55 GeV to 4.5 GeV, and the four-momentum transfer t ranged from 0.12 to 1.0 (GeV/c)2. The data at large angles, 60°<θ*<115°, are characterized by a pronounced excitation of the D13(1518) resonance, a shoulder in the 1688-MeV mass region, and a precipitous drop thereafter in the cross section as a function of incident energy. The low-t data are characterized by a diffraction slope of 5 (GeV/c)−2. The data are inconsistent with the predictions of the vector-dominance model if the latter is restricted to ρ0, ω, and φ vector mesons.

1 data table

Table 1

No description provided.

Measurement of the Backward Peaks in the Reactions pi- p --> K0 Lambda and pi- p --> K*0 (890) Lambda

Foley, K.J. ; Love, W.A. ; Ozaki, S. ; et al.

Phys.Rev.D 10 (1974) 2763, 1974.

Inspire Record 1420 DOI 10.17182/hepdata.24944

We present the differential cross sections near u=0 for the reactions π−p→K0Λ and π−p→K*0(890)Λ at incident pion momenta of 8 and 10.7 GeV/c. The differential cross section for the first reaction follows the exponential dependence on u previously observed, while the second shows a dip in the backward direction.

3 data tables

Table 1

Axis error includes +- 25/25 contribution.

Table 2

Axis error includes +- 25/25 contribution.

Table 3

Axis error includes +- 25/25 contribution.

Lambda-Proton Elastic Scattering from 1-GeV/c to 17-GeV/c

Anderson, K.J. ; Gelfand, N.M. ; Keren, J. ; et al.

Phys.Rev.D 11 (1975) 473-477, 1975.

Inspire Record 103336 DOI 10.17182/hepdata.24870

The Λ-proton elastic scattering cross section has been measured between 1 and 17 GeV/c in a bubble chamber experiment. These are the first measurements of the elastic cross section for pΛ>5 GeV/c. The Λ's were produced by 25-GeV/c proton interactions in a platinum target. The cross section falls from 22 to 4 mb over the region. No significant polarization is observed.

2 data tables

Table 1

No description provided.

Table 2

CORRECTION MADE FOR KL P --> KS P.

Study of the Reaction K0(L) p --> K0(s) p in the Center-of-Mass Energy Range 1490-MeV-1700-MeV

The Bologna-Edinburgh-Glasgow-Pisa-Rutherford collaboration Bigi, A. ; Cameron, W. ; Capiluppi, P. ; et al.

Nucl.Phys.B 110 (1976) 25-39, 1976.

Inspire Record 108465 DOI 10.17182/hepdata.35717

Experimental results on the K L 0 p → K S 0 p reaction at 11 laboratory momenta between 300 and 800 MeV/ c are presented. The data are used to discriminate among the various sets of phase shifts for K + N scattering in the I = 0 state.

14 data tables

Table 1

STATISTICAL ERRORS ONLY. CROSS SECTIONS ARE NORMALIZED RELATIVE TO THE PI+ LAMBDA EVENTS - SEE THE RECORD OF L. BERTANZA ET AL., NP B110, 1 (1976).

Table 2

No description provided.

Table 3

No description provided.

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A Study of the Reactions K0(L) p --> Lambda pi+, Lambda pi+ pi0 and Sigma0 pi+ in the Center-Of-Mass Energy Range 1490-MeV-1700-MeV

The Bologna-Edinburgh-Glasgow-Pisa-Rutherford collaboration Bertanza, L. ; Cameron, W. ; Capiluppi, P. ; et al.

Nucl.Phys.B 110 (1976) 1-24, 1976.

Inspire Record 108723 DOI 10.17182/hepdata.35768

K L 0 p interactions were studied in the CERN 2m H 2 bubble chamber in the c.m. energy range 1490–1700 MeV. The experimental details are described. Results are presented on the final states Λπ + , Σ 0 π + and Λπ + π 0 . The effect of these data on a recent partial-wave analysis of the two-body states is examined.

26 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

KL --> 3PI USED TO MEASURE ABSOLUTE CROSS SECTIONS AT 530 MEV/C.

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High Statistics Investigation of K0 K- Decay of a2- Produced by 23-GeV/c pi- on Hydrogen

Margulies, M. ; Kramer, M.A. ; Foley, K.J. ; et al.

Phys.Rev.D 14 (1976) 667, 1976.

Inspire Record 3806 DOI 10.17182/hepdata.24780

We present the results of an experiment to study the reaction π−p→A2−p, A2−→KS0K− at 22.4 and 23.9 GeV/c. We have 3346 KS0K− events in the effective mass region 1.1 to 1.5 GeV, and covering the |t′| interval 0.0 to 1.0 (GeV/c)2. Because of the low background in this channel, we are able to study various |t′| regions, including the region 0.2 to 0.29 (GeV/c)2 in which the original split A2 peak was observed. We find no substructure in any region. We have also derived differential and total cross sections. The differential cross sections are well fitted by the form dσdt′=At′ebt′ with b≈7.0 (GeV/c)−2. The total cross section is in good agreement with the value derived from other experiments that measure the A2−→ρ0π− decay mode.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Inclusive mu - Pair Production at 150-GeV by pi+ Mesons and Protons

Anderson, K.J. ; Henry, G.G. ; McDonald, K.T. ; et al.

Phys.Rev.Lett. 37 (1976) 799, 1976.

Inspire Record 3993 DOI 10.17182/hepdata.21035

We report the measurements of the inclusive μ-pair production by 150-GeV protons and π+ mesons on beryllium. Absolute cross sections as well as the Feynman-x and PT dependence are presented in the mass region between 0.211 and 3.5 GeV/c2. Upper limits are also given for the inclusive production of η and ρ′(1600) mesons.

7 data tables

Table 1

DATA OBTAINED FROM FIGURE BY A.A. LEBEDEV.

Table 2

DATA OBTAINED FROM FIGURE BY A.A. LEBEDEV.

Table 3

No description provided.

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Study of the Reaction pi- p --> K0 Y* at 8.0-GeV/c, 10.7-GeV/c, and 15.7-GeV/c

Foley, K.J. ; Love, W.A. ; Ozaki, S. ; et al.

Phys.Rev.D 15 (1977) 609, 1977.

Inspire Record 4145 DOI 10.17182/hepdata.24625

We present differential and total cross sections for the reactions π−p→K0[Σ(1385)Λ(1405)] and π−p→K0Λ(1520) at incident pion momenta of 8.0, 10.7, and 15.7 GeV/c. Pions from the decay of the forward K0s's were detected in the forward leg of the BNL double-vee spectrometer and the recoil Y* 's were identified by the missing-mass technique.

3 data tables

Table 1

Axis error includes +- 20/20 contribution.

Table 2

Axis error includes +- 20/20 contribution.

Table 3

Axis error includes +- 20/20 contribution.

Production of the J/psi and psi-prime (3.7) by 225-GeV/c pi+- and Proton Beams on C and SN Targets.

Branson, J.G. ; Sanders, G.H. ; Smith, A.J.S. ; et al.

Phys.Rev.Lett. 38 (1977) 1331-1334, 1977.

Inspire Record 123330 DOI 10.17182/hepdata.21022

We present results of a large-acceptance experiment in which muon pairs were observed in the mass range 0.6 to 6.0 GeV/c2. Emphasis is given to features of the production of Jψ and ψ′(3.7) particles. We find [Bσ]ψ′(3.7)[Bσ]Jψ to be 0.007±0.004 for p-C and 0.018±0.007 for π+-C interactions. Comparison with results from e+e− storage rings indicates that both the Jψ and the ψ′(3.7) are produced strongly rather than electromagnetically in our experiment.

1 data table

Table 1

No description provided.

Hadronic Production of Massive Muon Pairs: Dependence on Incident Particle Type and on Target Nucleus.

Branson, J.G. ; Sanders, G.H. ; Smith, A.J.S. ; et al.

Phys.Rev.Lett. 38 (1977) 1334-1337, 1977.

Inspire Record 123331 DOI 10.17182/hepdata.21006

Data from a study of muon pairs produced in hadron-nucleus collisions are compared with the Drell-Yan model. Comparison of dimuon production by π+ and π− mesons on an isoscalar target shows evidence for a charge asymmetry characteristic of an isospin-nonconserving electromagnetic process. The average transverse momentum of the pairs increases smoothly with pair mass. Data taken on carbon and tin targets are used to extract the dependence on target atomic weight.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Total Cross-Sections for Charged Current Neutrino and anti-neutrino Interactions in BEBC in the Energy Range 20-GeV to 200-GeV

The Aachen-Bonn-CERN-London-Oxford-Saclay collaboration Bosetti, P.C. ; Deden, H. ; Deutschmann, M. ; et al.

Phys.Lett.B 70 (1977) 273, 1977.

Inspire Record 121301 DOI 10.17182/hepdata.27526

The charged-current cross sections for neutrinos and antineutrinos on nucleons in the energy range 20–200 GeV are given. Taken in conjunction with the previous Gargamelle results, they show that σ E is almost constant with energy for antineutrinos, and falls with energy for neutrinos. The value of 〈q 2 〉 E decreases with energy for both neutrinos and antineutrinos, and these deviations from exact Bjorken scaling are consistent with those observed in electron and muon inelastic scattering. We find no evidence for new heavy quark states with right-handed coupling.

2 data tables

Table 1

Measured charged current total cross section.

Table 2

Measured charged current total cross section.

K0(L) p Interactions in the Center-Of-Mass Energy Range 1.54-GeV to 1.71-GeV

The Bologna-Edinburgh-Glasgow-Pisa-Rutherford collaboration Cameron, W. ; Capiluppi, P. ; Flaminio, E. ; et al.

Nucl.Phys.B 132 (1978) 189-211, 1978.

Inspire Record 121297 DOI 10.17182/hepdata.35162

New experimental results on the reactions K L 0 p→K S 0 p, Λπ + , Σ 0 π + andΛπ + π 0 at c.m. energies between 1.54 and 1.71 GeV are presented. This experiment has a statistical accuracy comparable with or greater than corresponding K − p and K − d experiments in the same energy range and a comparison with the data from these different types of experiments has been made. A search has been made for narrow states with masses in the region of 1.58 GeV.

7 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Study of K* (1780) in the Reaction K- p --> K- pi+ n at 6-GeV/c

Chung, S.U. ; Etkin, A. ; Flaminio, V. ; et al.

Phys.Rev.Lett. 40 (1978) 355-358, 1978.

Inspire Record 122473 DOI 10.17182/hepdata.20913

We observe a K−π+ state at 1786 ± 8 MeV with a width 95 ± 31 MeV in the reaction K−p→K−π+n at 6 GeV/c, from an experiment carried out at the Brookhaven National Laboratory multiparticle spectrometer.

1 data table

Table 1

ERROR INCLUDES SYSTEMATIC NORMALIZATION UNCERTAINTY.

Analysis of Nucleon Structure Functions in CERN Bubble Chamber Neutrino Experiments

The Aachen-Bonn-CERN-London-Oxford-Saclay collaboration Bosetti, P.C. ; Deden, H. ; Deutschmann, M. ; et al.

Nucl.Phys.B 142 (1978) 1-28, 1978.

Inspire Record 6678 DOI 10.17182/hepdata.35031

We present results for the differential cross sections of neutrinos and antineutrinos on nucleons in the energy range E = 2−200 GeV, from the BEBC and Gargamelle experiments. The structure functions F 2 , 2 χF 1 and χF 3 have been evaluated as a function of χ and q 2 . Deviations are observed from Bjorken scaling, which are very similar to those found in electron and muon inelastic scattering. For the Callan-Gross ratio, we find 2χF 1 F 2 = 0.80 ± 0.12 and the corresponding value for 〈R〉 = 〈 σ S σ T 〉 = 0.15 ± 0.10 . Our results are consistent with the Gross-Llewellyn-Smith sum rule; we measure ⩾2.5 ± 0.5 valence quarks per nucleon. Quark and antiquark distributions are given. The Nachtmann moments of F 2 and χF 3 are quantitatively consistent with the predictions from QCD. The value of the strong interaction parameter is λ = 0.74 ± 0.05 GeV without corrections, and 0.66 ± 0.05 GeV including α S 2 corrections. The moments of the gluon distribution are found to be positive and indicate an χ distribution of gluons which is comparable with that of the valence quarks.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

A Determination of the Pion Structure Function from Muon Pair Production

Newman, C.B. ; Anderson, K.J. ; Coleman, R.N. ; et al.

Phys.Rev.Lett. 42 (1979) 951, 1979.

Inspire Record 140037 DOI 10.17182/hepdata.20767

Data on muon-pair production by pions are used to determine the momentum distribution for valence quarks in the pion. The shape of a nucleon structure function is also obtained and is compared with a calculation based on existing data.

1 data table

Table 1

No description provided.

MEASUREMENT AND PARTIAL WAVE ANALYSIS OF THE REACTION K- P ---> K0(S) PI+ PI- N AT 6-GEV/C

Etkin, A. ; Foley, K.J. ; Goldman, J.H. ; et al.

Phys.Rev.D 22 (1980) 42-60, 1980.

Inspire Record 157981 DOI 10.17182/hepdata.24157

We have performed a partial-wave analysis of the reaction K−p→KS0π+π−n at 6 GeV/c. We present the results of the analysis of about 4500 events in the low-t region (|t′|<0.2 GeV2) for the dominant waves in the 1200-to-2000-MeV mass range. We observe the 2+ K*(1430) and clear signals for the 1+ Q2(1400) and the 3− K*(1800). We find a new 1− resonance at about 1500 MeV and have some evidence for another 1− resonance at 1800 MeV. We also present the results of a partial-wave analysis as a function of t in the 1430-MeV mass region.

1 data table

Table 1

TP DEPENDENCE OF PARTIAL WAVES ALSO STUDIED.

Transverse Momentum of Hadrons Produced in Neutrino and Anti-neutrino Interactions on an Isoscalar Target in BEBC

The Aachen-Bonn-CERN-Democritos-London-Oxford-Saclay collaboration Deden, H. ; Fritze, P. ; Grassler, H. ; et al.

Nucl.Phys.B 181 (1981) 375, 1981.

Inspire Record 153272 DOI 10.17182/hepdata.34301

The average transverse momentum squared, 〈 p ⊥ 2 〉, of hadrons is studied as a function of W 2 and of Q 2 for ν and ν interactions on an isoscalar target. An increase of 〈 p ⊥ 2 〉 with W 2 is observed for the hadrons emitted forward in the hadronic c.m.s. The p ⊥ dependence of the fragmentation function is found to factorise from the structure function at fixed W , but does not factorise at fixed Q 2 . Unlike the case of forward-going particles, the 〈 p ⊥ 2 〉 of hadrons going backward in the c.m.s. shows no strong dependence on W 2 .

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarization of Muoproduced J/psi (3100)

Clark, A.R. ; Johnson, K.J. ; Kerth, L.T. ; et al.

Phys.Rev.Lett. 45 (1980) 2092, 1980.

Inspire Record 155741 DOI 10.17182/hepdata.20697

The polarization and Q2 dependence of muoproduced ψ→μ+μ− have been analyzed in a magnetized-steel calorimeter at Fermilab. The reaction γVN→ψN is found to be helicity conserving. Even after allowance for possible Q2 dependence of the decay angular distribution, the ψ muoproduction cross section falls more steeply in Q2 than predicted by ψ dominance.

4 data tables

Table 1

EFFECTIVE CROSS SECTION IN ARBITRARY UNITS.

Table 2

EFFECTIVE CROSS SECTION IN ARBITRARY UNITS.

Table 3

EFFECTIVE CROSS SECTION IN ARBITRARY UNITS.

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Amplitude Analysis of the K0(s) K0(s) System Produced in the Reaction pi- p ---> K0(s) K0(s) n at 23-GeV/c

Etkin, A. ; Foley, K.J. ; Longacre, R.S. ; et al.

Phys.Rev.D 25 (1982) 1786, 1982.

Inspire Record 169729 DOI 10.17182/hepdata.24030

We have carried out an amplitude analysis of the KS0KS0 system produced in the reaction π−p→KS0KS0n at 23 GeV/c, based on about 15 000 events in the low-t region (|t−tmin|<0.1 GeV2). Below 1.6 GeV/c2, our favored solution is very similar to those from previous analyses. For higher masses, we observe the KS0KS0 decay of the h(2040) meson. In addition, the l=0 partial wave contains a new state, strongly coupled to KS0KS0, with parameters M=1.771−0.053+0.077 GeV/c2 and Γ=0.200−0.009+0.156 GeV/c2. Since this state is most probably I=0, we call it the S*′(1770). We find an f′f production ratio of 0.23−0.13+0.14, and branching ratios for f-meson and h(2040)-meson decays into KK¯ of (3.1−1.7+0.7)% and (0.67−0.15+0.41)%, respectively. We find, in a detailed comparison of our results with those from other experiments, that our solution is compatible with all known features of both charged and neutral KK¯ systems.

1 data table

Table 1

No description provided.

Total Cross-sections for $\nu_\mu$ and $\bar{\nu}_\mu$ Charged Current Interactions Between 20-{GeV} and 200-{GeV}

The Aachen-Bonn-CERN-Democritos-London-Oxford-Saclay collaboration Bosetti, P. ; Deden, H. ; Fritze, P. ; et al.

Phys.Lett.B 110 (1982) 167-172, 1982.

Inspire Record 169123 DOI 10.17182/hepdata.30976

Exposures of the Ne/H 2 filled Big European Bubble Chamber (BEBC) to a dichromatic neutrino (antineutrino) beam produced by 400 GeV protons of the CERN SPS yielded ∼ 3100 events with a negative, and ∼ 1100 with a positive, muon. The neutrino flux is determined from the muon flux in the shielding. Assuming a linear energy dependence of the cross section, the values σ E between 20 and 200 GeV are found to be 0.657 ± 0.012 (stat.) ± 0.027 (syst.) and 0.309 ± 0.009 (stat.) ± 0.013 (syst.) cm 2 (GeV nucleon) −1 , for neutrinos and antineutrinos, respectively. The scaling variable q 2 E decreases significantly with increasing energy both for neutrinos and antineutrinos.

3 data tables

Table 1

Measured charged current total cross section.

Table 2

Measured charged current total cross section.

Table 3

No description provided.

Search for $D^*$- Production With a 16-{GeV}/$c \pi^-$ Beam

Chung, S.U. ; Etkin, A. ; Fernow, Richard C. ; et al.

Phys.Rev.Lett. 48 (1982) 785, 1982.

Inspire Record 170568 DOI 10.17182/hepdata.20594

A search for production of D*−'s using the decay chain D0π−, D0→K+π−, was carried out at the Brookhaven National Laboratory multiparticle spectrometer with a 16-GeV/c π− beam and a hydrogen target. At 95% confidence level the upper limits for the product of peripheral production cross section by branching ratio are 2.4 nb for inclusive D*− production and 1.3 nb for the exclusive channel π−p→D*−Λc.

1 data table

Table 1

UPPER LIMIT TO CROSS SECTIONS.

Comparison of Nucleon Structure Functions in Bubble Chamber Neutrino Experiments With {QCD} Predictions

The Aachen-Bonn-CERN-Democritos-London-Oxford-Saclay collaboration Bosetti, P.C. ; Fritze, P. ; Grassler, H. ; et al.

Nucl.Phys.B 203 (1982) 362-384, 1982.

Inspire Record 177120 DOI 10.17182/hepdata.34172

None

1 data table

Table 1

ERRORS SHOWN ARE STATISTCAL. STRUCTURE FUNCTIONS COMPUTED ASSUMING CALLAN-GROSS RELATION.

Differential Cross-section and Polarization for $\pi^+ p \to K^+ \Sigma^+$ at 26 Momenta Between 1.282-{GeV}/$c$ and 2.473-{GeV}/$c$

Candlin, D.J. ; Lowe, D.C. ; Peach, K.J. ; et al.

Nucl.Phys.B 226 (1983) 1, 1983.

Inspire Record 183213 DOI 10.17182/hepdata.8242

Differential cross sections and polarisations in the reaction π + p→K + Σ + have been measured using the Rutherford Multiparticle Spectrometer at NIMROD. Data are presented at 26 momentum points at approximately 50 MeV/ c intervals in the range 1.282 to 2.473 GeV/ c with an order of magnitude more events than previous experiments. Legendre polynomial expansion coefficients have also been determined.

5 data tables

Table 1

ERRORS HAVE SYSTEMATIC AND STATISTICAL ERRORS FOLDED IN QUADRATURE. TYPICAL STATISTICAL ERRORS ARE 2 PCT OR LESS.

Table 2

No description provided.

Table 3

No description provided.

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Resonance Production in Diffractive $\pi^- N \to K^0_s K^0_s \pi^- N^{\prime}$ at 200-GeV/c

Chen, T.Y. ; Jenkins, E.W. ; Johnson, K.J. ; et al.

Phys.Rev.D 28 (1983) 2304, 1983.

Inspire Record 182627 DOI 10.17182/hepdata.23787

The reaction π−N→KS0KS0π−N′ at 200 GeV/c has been observed with a sensitivity of 450±150 events/μb. The KS0KS0π− system exhibits substantial K*−(890)K0 production. Also produced are f0(1270)π−, f′(1515)π−, and K*−(1430)K0 final states. These resonances occur predominantly at threshold. The diffractive KS0KS0π− cross section is 3.4±1.1 μb. An enhancement near the A3−(1680) is observed in the KS0KS0π− invariant-mass distribution.

2 data tables

Table 1

No description provided.

Table 2

EVIDENCE FOR A3 MESON SEEN.

Measurement of the Nucleon Structure Function in Iron Using 215-GeV and 93-GeV Muons

Clark, A.R. ; Johnson, K.J. ; Kerth, L.T. ; et al.

Phys.Rev.Lett. 51 (1983) 1826, 1983.

Inspire Record 191249 DOI 10.17182/hepdata.23473

This Letter presents measurements of the nucleon structure function F2(x,Q2) based on the deep-inelastic scattering of 215- and 93-GeV muons in the iron multimuon spectrometer at Fermilab. With use of a lowest-order QCD calculation, a value of ΛLO=230±40(stat.)±80(syst.) MeV/c is found.

7 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Diffractive Production of $K^0_s K^0_s \pi^+ \pi^- \pi^-$ in $\pi^-N$ Interactions at 200-GeV/c

Chang, C.C. ; Davis, T.C. ; Diamond, R.N. ; et al.

Phys.Rev.D 29 (1984) 1888-1894, 1984.

Inspire Record 194648 DOI 10.17182/hepdata.23730

The diffractive dissociation of a 200-GeV/c π− beam into KS0KS0π+π−π− has been observed. The diffractive KS0KS0π+π−π− cross section is 1.59±0.78 μb. The ratio of the diffractive KS0KS0π+π−π− cross section to the diffractive KS0KS0π− cross section is 0.40±0.13, which is in good agreement with a diffractive-fragmentation-model prediction of 0.36. There is evidence for simultaneous production of K*− and K*+ in the diffractive KS0KS0π+π−π− sample. The K*+−KS0π−+ mass distribution shows an enhancement near 1.95 GeV.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

A MEASUREMENT OF pi+ p BACKWARD ELASTIC DIFFERENTIAL CROSS-SECTIONS FROM 1.282-GeV/c TO 2.472-GeV/c

Candlin, D.J. ; Lowe, D.C. ; Peach, K.J. ; et al.

Nucl.Phys.B 244 (1984) 23-56, 1984.

Inspire Record 201771 DOI 10.17182/hepdata.7101

New high-statistics measurements of π + p elastic scattering differential cross sections are presented at 30 momentum points between 1.282 and 2.472 GeV/ c , covering most of the angular distribution outside the forward diffractive peak. These data show significant disagreements at some momenta with previous high-statistics experiments and with current partial wave analyses.

30 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Jets in High Transverse Energy Events at the {CERN} Intersecting Storage Rings

The CMOR collaboration Angelis, A.L.S. ; Basini, G. ; Besch, H.J. ; et al.

Nucl.Phys.B 244 (1984) 1-22, 1984.

Inspire Record 202452 DOI 10.17182/hepdata.33870

Most events with high neutral transverse energy, E T 0 , produced in pp colisions at √ s = 62.3 GeV, are jet-like. The evidence for this is presented, based on data collected using an electromagnetic calorimeter covering 90% of 2π in azimuth. The spectrum d N /d E T 0 has been measured over the E T 0 range from 10 to 35 GeV. Properties of the observed jets are discussed.

1 data table

Table 1

No description provided.

Large Transverse Momentum $\pi^0$ Production in $\alpha \alpha d d$ and $p p$ Collisions at the {CERN} {ISR}

The BCMOR collaboration Angelis, A.L.S. ; Basini, G. ; Besch, H.J. ; et al.

Phys.Lett.B 185 (1987) 213-217, 1987.

Inspire Record 222768 DOI 10.17182/hepdata.30194

None

1 data table

Table 1

No description provided.

High Transverse Energy and High Transverse Momentum Events in $p \bar{p}$ and $p p$ Interactions at the {CERN} Intersecting Storage Rings

The CMOR collaboration Angelis, A.L.S. ; Basini, G. ; Besch, H.J. ; et al.

Nucl.Phys.B 263 (1986) 228-244, 1986.

Inspire Record 216800 DOI 10.17182/hepdata.33698

A comparison between p p and pp interactions at √ s = 52.7 GeV is presented for a total neutral transverse energy ( E T o ) trigger and for a high transverse momentum ( p T ) neutral cluster trigger. The rate of production of events in the range 6< E T o <20 GeV is observed to be 10% higher in p p collisions than in pp collisions. A study of the structure of the events shows this excess to be due to more isotropic events being produced in p p collisions. The ratio of the production cross section for single neutral clusters in p p and pp interactions in the range 1.25< p T <10 GeV/ c does not significantly differ from unity.

1 data table

Table 1

No description provided.

Inclusive Strange Particle Production in Single Vee Events in 200-GeV/c pi- n Interactions

Mikocki, S. ; Ficenec, J.R. ; Torres, S. ; et al.

Phys.Rev.D 34 (1986) 42, 1986.

Inspire Record 218617 DOI 10.17182/hepdata.23427

For the reaction π−N→V0X, where V0 is a Ks0, Λ, and Λ¯ and X are charged particles, we measured the transverse- and longitudinal-momentum distributions, and inclusive cross sections for the V0 and for K*±(892), Σ±(1385), and Ξ±(1321). We compare our results with predictions of quark-counting rules, and conclude that valence quarks play an important role in strange-particle production.

1 data table

Table 1

No description provided.

Observation of Three 2++ Resonances in the Glueball Enhanced Channel $\pi^- p \to \phi \phi n$

Etkin, A. ; Foley, K.J. ; Longacre, R.S. ; et al.

Phys.Lett.B 165 (1985) 217-221, 1985.

Inspire Record 218668 DOI 10.17182/hepdata.30309

We present data on 3652 analyzed events of the reaction π - p → φφn at 22 GeV/ c . A partial wave analysis has been performed on the φφ system. The results are well represented by three resonances all with quantum numbers I G J PC = 0 + 2 ++ . The absence of the Okubo-Zweig-Iizuka suppression observed in this reaction, the selection of only three J PC =2 ++ states ( g T , g T′ , and g T ″ ) which comprise virtually all of the cross section, and the large φφn signal over a very different φK + K - n background are all well explained if these states are produced by 1–3 glueballs (i.e. multigluon resonances).

1 data table

Table 1

Slope indicates pion exchange process.

A Measurement of $\pi^- p \to K^0(s$) $K^0(s$) $n$ at 22-{GeV}/$c$ and a Systematic Study of the 2++ Meson Spectrum

Longacre, R.S. ; Etkin, A. ; Foley, K.J. ; et al.

Phys.Lett.B 177 (1986) 223-227, 1986.

Inspire Record 230183 DOI 10.17182/hepdata.30232

A coupled channel analysis has been carried out using a new amplitude analysis of the K 0 s K 0 s system produced in the reaction π − p→K 0 s K 0 s n at 22 GeV/ c , which contained about 40 000 new events in the low- t region (| t − t min |<0.1 GeV 2 ). Here only the I G =0 + , J PC =2 ++ amplitude from this analysis is considered, together with available data from other experiments in channels with the same quantum numbers in order to determine which 2 ++ isoscalar mesons have significant pseudoscalar-pseudoscalar couplings. It is found that four poles, f(1270), f'(1525), θ(1690), and f r (1810), are needed, plus a smooth background in order to fit these data; the need for the θ(1690) depends on the J/ψ radiative decay alone, and the f r (1810) is seen only in hadronic production.

1 data table

Table 1

No description provided.

$\Xi^-$ and $\Omega^-$ Inclusive Production in $\Xi^-$ Be Interactions at 116-{GeV}/$c$

Biagi, S.F. ; Bourquin, M. ; Brown, R.M. ; et al.

Z.Phys.C 34 (1987) 187-200, 1987.

Inspire Record 233256 DOI 10.17182/hepdata.15801

The cross sections for Ξ− and Ω− inclusive production in Ξ− Be collisions at 116 GeV/c have been measured in the kinematic domain [0.1<xF<0.9, 0<pT<1.7 GeV/c]. The integrated cross sections per nucleon are found to be about twice as large as in Ξ−p collisions. The invariant cross sections increase by a factor of 70 for the Ξ−s and of 100 for the Ω−s between the central region (xF∼0.2) and the projectile fragmentation region (xF∼0.8). In the central region, they have about the same magnitude as the ones for Ξ− and Ω− inclusive production inp nucleon collisions. The Ξ− and Ω− polarisations have been measured over the same kinematic domain and are found to be compatible with zero.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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DIFFRACTIVE PRODUCTION OF pi- pi- pi+ IN 200-GeV/c pi- N INTERACTIONS

Joyner, R.W. ; Chang, C.C. ; Davis, T.C. ; et al.

Phys.Rev.D 39 (1989) 1865, 1989.

Inspire Record 22768 DOI 10.17182/hepdata.23242

This paper analyzes π−N→π−π−π+N events from Fermilab experiment E-580, using 200-GeV/c particles on a segmented target of plastic scintillator. Starting with 48 657 triggers, data-quality cuts and a cut on missing mass squared of M2<16 GeV2 lead to a final sample of 7205 events. The xF distribution of the 3π system shows almost all events in a sharp peak at xF=1, suggesting the presence of beam diffraction into three pions. The overall t’ distribution is fit to the sum of three exponential terms corresponding to coherent diffraction from carbon nuclei, diffraction from individual nucleons, and background. Cross sections per nucleon and exponential slopes are reported for each of the three components as a function of 3π effective mass. The cross section for diffraction from the nucleons in the target is 0.34±0.04 mb/nucleon. The cross section for coherent diffraction from carbon is 1.08±0.12 mb/nucleus. The exponential slope for diffraction is observed to decrease with increasing 3π effective mass. The fraction of coherent carbon diffraction in the total cross section is observed to decrease with increasing 3π effective mass. In the π−π+ effective-mass spectrum the ρ0(770) and f0(1270) are observed and their cross sections per nucleon are calculated. In the π−π−π+ effective-mass spectrum the A1−/A2− and A3− enhancements are observed and a cross section for the A3− is calculated.

8 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

Diffraction from coherent carbon nucleus.

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Increased Statistics and Observation of the $g(T$), $g(T$)-prime, and $g(T$)-prime-prime 2++ Resonances in the Glueball Enhanced Channel $\pi^- p \to \phi \phi n$

Etkin, A. ; Foley, K.J. ; Hackenburg, R.W. ; et al.

Phys.Lett.B 201 (1988) 568-572, 1988.

Inspire Record 253944 DOI 10.17182/hepdata.30006

In a new experiment we have obtained 3006 new events in the reaction π − p → φφ n, approximately doubling the statistics which now total 6658. A refined partial wave analysis of the φφ system again reveals three resonances (g T , g T′ , g T′' ) with I G J PC =0 + 2 ++ . The absence of the OZI suppression, and the observation of only three J PC =2 ++ states (g T , g T′ , g T′' ) which comprise virtually all the cross section are unusual characteristics of the data. The large φφn signal occurs over a mostly structureless and incoherent φK + K − n background. All these unusual characteristics are well explained if these states are produced by 1–3 glueballs (multigluon resonances).

2 data tables

Table 1

Total cross section plus systematic error supplied by authors.

Table 2

Absolute cross section based on total cross section of 50 +- 15 nb. Errors quoted in Table are statistical only.