Date

Partial Wave Analysis of the (anti-K0 pi- pi0)-System Produced in the q-Mass Region in K- p --> (anti-K0 pi- pi0) p at 10-GeV/c and 16-GeV/c

The Aachen-Berlin-CERN-London-Vienna collaboration Otter, G. ; Barnham, Keith W J ; Cocconi, Vanna T ; et al.
Nucl.Phys.B 96 (1975) 29-44, 1975.
Inspire Record 98691 DOI 10.17182/hepdata.31971

A partial-wave analysis has been performed of the diffractively produced low-mass ( K ̄ 0 π − π 0 ) system in the reaction K − p → ( K ̄ 0 π − π 0 ) p at 10 and 16 GeV/ c . Thus information complementary to that derived from the K − p → (K − π + π − )p) channel is obtained. The presence of the K ϱ decay mode, besides the dominant K ∗ (890)π mode, for the state J P = 1 + , is confirmed. It is also confirmed that for this 1 + state the assumption of factorization of the amplitude into “production” and “decay” does not hold: the two decay modes K ∗ π and K ϱ have different polarisation properties (helicity is approximately conserved in the t -channel for the first, in the s -channel for the second). The assumption that the ( K ̄ 0 π − π 0 ) system has isospin I = 1 2 has been tested and found to hold. From the cross sections for the various J P states, assuming I = 1 2 , the cross sections for the (K − π + π − ) system are predicted and compared with the experimental ones. In general, agreement is found.

2 data tables match query

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Differential Cross-Sections for the Charge Exchange Process pi+ p ---> pi0 (pi+ p) at 8-GeV/c, 16-GeV/c and 23-GeV/c

The Aachen-Berlin-Bonn-CERN-Cracow-Heidelberg collaboration Baker, P A ; Barnham, Keith W.J. ; Buschbeck, Brigitte ; et al.
Nucl.Phys.B 85 (1975) 31-38, 1975.
Inspire Record 90862 DOI 10.17182/hepdata.32119

The differential cross section d σ d t′ for the charge-exchange process π + p → π 0 ( π + p) at 8, 16 and 23 GeV/ c is presented for several regions of the π + p effective mass. It is found that the dip at t ′ ≈ 0.6 (GeV/ c ) 2 which is observed in the Δ(1236) mass band becomes a less pronounced structure in the higher mass regions. However, while the slope of the d σ d t′ distributions in the near-forward direction decreases strongly with increasing π + p mass, there is no evidence that the observed structure moves to higher values of t ′ as the π + p mass increases. These results are consistent with a Regge-exchange picture where the position of the dip is determined by the exchanged trajectory, but are inconsistent with a simple geometrical picture.

1 data table match query

TP DEPENDENCE FOR FOUR <PI+ P> MASS INTERVALS.


Phi Meson Production in 3.75-GeV/c pi+ p Interactions

Gidal, G. ; Michael, W. ; Trilling, G. ; et al.
Phys.Rev.D 17 (1978) 1256, 1978.
Inspire Record 5868 DOI 10.17182/hepdata.31764

The production of φ mesions is studied in the reaction π+p→π+p K+K− and π+→π+p K0K¯0 at 3.75 GeV/c. A large isotropic component is seen in the production angular distribution for the reaction π+p→π+pφ. The cross sections for the φπ+p and φΔ++ final states are compared with the cross sections for ωπ+p and ωΔ++ at the same momentum.

3 data tables match query

NORMALIZED TO THE CROSS SECTION FOR PI+ P --> PI+ P PI+ PI-.

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Fragmentation Spectra in $K^- p$ Interactions at 110-{GeV}/$c$

The Aachen-Berlin-CERN-Cracow-London-Vienna-Warsaw collaboration Gottgens, R. ; Sixel, P. ; Klein, R. ; et al.
Z.Phys.C 9 (1981) 21, 1981.
Inspire Record 156265 DOI 10.17182/hepdata.14213

The longitudinal momentum spectra of mesons produced in the projectile fragmentation region ofK−p interactions at 110 GeV/c, measured in a bubble chamber experiment, are compared to two fragmentation models related to hadron production by incident leptons. The models give a qualitative description of the data. However, it is found that the mesons having a valence quark in common with the projectile tend to have higher momenta than predicted.

1 data table match query

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Inclusive Production of Meson Resonances in $K^- p$ Interactions at 110-{GeV}/$c$

The Aachen-Berlin-CERN-Cracow-London-Vienna-Warsaw collaboration Gottgens, R. ; Ransone, G. ; Sixel, P. ; et al.
Z.Phys.C 12 (1982) 323, 1982.
Inspire Record 169125 DOI 10.17182/hepdata.2138

Total and differential cross sections ofK*−(890),K*−(890),\(\bar K^{ * 0} \)(890),K*0(890),\(\bar K^{ * 0} \)(1430) andϱ0(770) produced inK−p interactions at 110 GeV/c are presented. The cross sections of the neutral resonances show a smooth increase with energy from 10 to 110 GeV/c incident momentum. For theK*+(890) and theK*0(890), i.e. the resonances with strangenessS=+1, this rise is quite significant: their cross sections practically double between 32 GeV/c and 110 GeV/c incidentK− momentum. About 50% of the neutral kaons and 30% of charged pions produced inK−p interactions at our energy are found to be decay products of the resonances considered.

8 data tables match query

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A study of k pi pi states produced in 10 gev/c k+ p interactions

Barnham, K.W.J. ; Colley, D.C. ; Dodd, W.P. ; et al.
Nucl.Phys.B 25 (1970) 49-74, 1971.
Inspire Record 68842 DOI 10.17182/hepdata.33832

We present an analysis of the K ππ system produced in 10 GeV/ c K + p interactions. We show that the low-mass enchancement between 1.2 and 1.4 GeV/ c 2 on the K ππ mass spectrum is predominantly 1 + throughout, give the relative amplitudes for the decay of this system into K ∗ (890) π and K ρ , and offer new evidence for the presence of two 1 + resonances in this mass region.

2 data tables match query

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DIFFERENTIAL CROSS SECTION FOR THREE MASS BANDS IN Q-REGION. NORMALIZATION UNCERTAIN - NO UNITS FOR D(SIG)/DT GIVEN ON FIGURE. NUMERICAL VALUES TAKEN FROM THE COMPILATION LST7V2 FOX 72B. ERRORS ADDED AS 1/SQRT(EVENTS).


Measurement of the Ratios of Neutral Current to Charged Current Cross-sections of Neutrino and Anti-neutrinos Interactions in Ne

The Aachen-Bonn-CERN-Democritos-London-Oxford-Saclay collaboration Bosetti, P.C. ; Fritze, P. ; Grassler, H. ; et al.
Nucl.Phys.B 217 (1983) 1-10, 1983.
Inspire Record 12766 DOI 10.17182/hepdata.33963

The ratios of neutral current to charged current cross sections of neutrino and antineutrino interactions in heavy Ne/H 2 mixture have been measured in BEBC. The beam was the CERN SPS 200 GeV/ c narrow band beam. The ratios were obtained using a cut in the transverse momentum of the hadronic system. In the standard Glashow-Salam-Weinberg model, our results correspond to the value of sin 2 θ w = 0.182 ± 0.020 ± 0.012. By combining this experiment with data from a hydrogen target the coupling constants u L 2 and L 2 are found to be 0.15 ± 0.04 and 0.19 ± 0.05, respectively.

2 data tables match query

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An Investigation of the Emc Effect Using Anti-neutrinos Interactions in Deuterium and Neon

The WA25 & WA59 collaborations Cooper-Sarkar, Amanda M. ; Derkaoui, J. ; Faccini-Turluer, M.L. ; et al.
Phys.Lett.B 141 (1984) 133-139, 1984.
Inspire Record 200773 DOI 10.17182/hepdata.30546

Antineutrino interactions in BEBC are compared to look for differences between the differential cross sections per nucleon in neon and in deuterium. The identical geometries, beam spectra and muon identification criteria and acceptances allow comparison with very small systematic errors. The results are compared in detail with μ and e scattering data from EMC and SLAC. We find no rise in the ratio d σ/ d x ( ν Ne )/σ/ d x ( ν D 2 ) at low x , independent of Q 2 up to Q 2 ∼ 14 GeV 2 .

1 data table match query

VALUES OF Q**2 IN THIS TABLE ARE :- 1.07,2.59,4.33,6.14,7.67,8.28,6.35 (FOR ALL Q**2) AND :-,7.9,9.5,11.5,13.2,13.9,11.6 (FOR Q**2 > 4.5 ).


Inclusive Production of $\gamma$, Neutral $K$, $\Lambda^0$ and $\bar{\Lambda}^0$ in $K^- p$ Interactions at 110-{GeV}/$c$

The Aachen-Berlin-CERN-Cracow-London-Vienna-Warsaw collaboration Wright, P.R.S. ; Bardadin-Otwinowska, M. ; Barnham, K.W.J. ; et al.
Nucl.Phys.B 189 (1981) 421-441, 1981.
Inspire Record 164129 DOI 10.17182/hepdata.34242

Results on inclusive production of γ,K n , Λ 0 and Λ 0 in K − p interactions at 110 GeV/ c are presented. Total cross sections, and differential cross sections in terms of Feynman x , rapidity and p T 2 are given. It is found that about 40% of K n 's are produced together with a strange particle pair, and that 80% of Λ 0 's are produced together with a K K pair. These Λ 0, 's are produced predominantly in the backward direction. Fits to the form (1−| x |) n to the x F distributions of K n and Λ 0 in the fragmentation regions are found to be in general agreement with quark counting rule predictions.

5 data tables match query

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Diffraction Dissociation, Resonances and Deck Mechanism in the $K \omega$ Systems of the Reactions $K^+^- p \to$ ($K^+^- \omega$) $p$

The Aachen-Berlin-CERN-London-Vienna & Birmingham-Brussels-CERN-Mons-Serpukhov collaborations Otter, G. ; Rudolph, G. ; Wieczorek, H. ; et al.
Nucl.Phys.B 181 (1981) 1-21, 1981.
Inspire Record 153195 DOI 10.17182/hepdata.34348

A study is presented of the reactions K + p→(K + ω )p at 8.25 and 16 GeV/ c and K − p→(K − ω )p at 10 and 16 GeV/ c and comparison is made with K + results at 10 GeV/ c and K − at 7.3 GeV/ c . The (K + ω) and (K − ω) mass spectra both present a strong enhancement very near threshold, while a second peak at ∼1.7 GeV is evident only with incident K − at the lower energies. The threshold peak has very weak energy dependence and is mostly due to the 1 + S state which is produced conserving s -channel helicity. It is suggested that this is another decay mode of the resonance Q 1 (1290) known to decay mainly into Kϱ. The ratio of the Q 1 coupling constants to the Kω and Kϱ decay channels, R ω = g K ω 2 / g K ϱ 2 is determined to be 0.21±0.04. The enhancement at 1.7 GeV is predominantly, but not exclusively, due to the 2 − state. While the K + and K − induced reactions give basically similar results, small differences are observed that can be qualitatively explained in the framework of the Deck model.

2 data tables match query

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