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Neutron-Proton Differential-Cross-Section Measurements at 50 MeV

Montgomery, T.C. ; Brady, F.P. ; Bonner, B.E. ; et al.
Phys.Rev.Lett. 31 (1973) 640-643, 1973.
Inspire Record 945159 DOI 10.17182/hepdata.21337

The neutron-proton differential cross section at 50.0 MeV has been measured to a precision of ≃ 2% for backward-hemisphere c.m. angles and ≃ 3% for forward angles, both relative. The present data are not in good agreement with the previous n−p measurements near this energy. A preliminary phase-shift analysis using the present data produces more satisfactory results, particularly for the P11 phase shift.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Observation of Vector Meson Production in Inclusive p p Reactions

The Bonn-Hamburg-Munich collaboration Blobel, V. ; Fesefeldt, H. ; Franz, H. ; et al.
Phys.Lett.B 48 (1974) 73-76, 1974.
Inspire Record 80794 DOI 10.17182/hepdata.27994

We have measured cross sections, rapidity and transverse momentum distributions, and vector meson polarization for the reactions pp→ ϱ o +anything, pp→ ω +charged particles, and pp → K ∗± + anything at incident laboratory momenta of 12 and 24 GeV/ c . We discuss various consequences of our results as well as possible connections with lepton pair production.

9 data tables
Table 1

No description provided.

Table 2

DATA OBTAINED FROM FIGURE BY A.A. LEBEDEV.

Table 3

DATA OBTAINED FROM FIGURE BY A.A. LEBEDEV.

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ANTI-PROTON - PROTON ANNIHILATION INTO FIVE AND MORE PIONS AT 2.32-GeV/c

Oren, Y. ; Cooper, W.A. ; Fields, T. ; et al.
Nucl.Phys.B 71 (1974) 189-210, 1974.
Inspire Record 80613 DOI 10.17182/hepdata.32346

High statistics data on p p annihilation into five and more pions at 2.32 GeV/ c are presented. Cross sections for various final states and for the production of meson resonances have been determined. The Dalitz plot asymmetry for some 4 800 ω decay events produced in p p → 2π + 2π − π 0 is found to be consistent with zero. Upper limits for the production of exotic meson resonances are presented.

1 data table
Table 1

No description provided.


STUDY OF THE I = 3/2 K- pi- ELASTIC SCATTERING FROM THE REACTION K- p ---> K- pi- p pi+ AT 4.25-GeV/c INCIDENT K- MOMENTUM

Jongejans, B. ; van Meurs, R.A. ; Tenner, A.G. ; et al.
Nucl.Phys.B 67 (1973) 381-394, 1973.
Inspire Record 80765 DOI 10.17182/hepdata.32357

Results on the elastic K − π − scattering have been obtained from a study of the K − π − system in 15 000 events of the type K − p→K − π − p π + at a K − beam momentum of 4.25 GeV/ c . The on-mass-shell values of the spherical harmonic moments of the K − π − scattering angular distribution and the K − π − elastic cross section have been obtained by extrapolation to the pion pole. From these values we determined the s- and p-wave phase shifts δ 0 3 and δ 1 3 as a function of the effective mass of the K − π − system between threshold and 1.25 GeV/ c 2 . The value of | δ 0 3 | is smaller than 17° for all mass values and the existence of a p-wave cannot be neglected. At m K − π − = 1.18 GeV/ c 2 there are two solutions for the phase shifts. On the average, the cross section of the K − π − elastic scattering over the region of the effective mass considered amounts to approximately 2.5 mb.

2 data tables
Table 1

The errors combine statistical and systematical effects.

Table 2

The errors are statistical.


MULTIPLICITY AND CORRELATIONS OF SECONDARY PARTICLES PRODUCED IN pi- C-12 COLLISIONS AT 40-GeV/c

Grishin, V.G. ; Inogamova, T.Ya. ; Inogamov, Sh.V. ;
Sov.J.Nucl.Phys. 19 (1974) 697, 1974.
Inspire Record 80902 DOI 10.17182/hepdata.18353

None

2 data tables
Table 1

No description provided.

Table 2

QUAZIFREE INTERACTIONS WITH NUCLEONS IN C ARE EXCLUDED.


PHOTOPRODUCTION OF NEUTRAL PIONS ON HYDROGEN BELOW 500-MeV. 3. CROSS-SECTION MEASUREMENTS BETWEEN THE FIRST AND THE SECOND RESONANCE

Genzel, H. ;
Z.Phys. 268 (1974) 37-41, 1974.
Inspire Record 80489 DOI 10.17182/hepdata.2

Differential cross sections of neutral pion photoproduction on hydrogen were measured in the region between the first and the second nucleon resonance at photon energies of 400–500 MeV and were compared with results of an energy-independent multipole analysis.

1 data table
Table 1

No description provided.


Measurement of Neutron-Deuteron Polarization at 35 MeV

Zamudio-Cristi, J. ; Bonner, B.E. ; Brady, F.P. ; et al.
Phys.Rev.Lett. 31 (1973) 1009-1012, 1973.
Inspire Record 945160 DOI 10.17182/hepdata.21394

The neutron polarization asymmetry in neutron-deuteron scattering has been measured from 44.5° to 160° (c.m.) neutron angle. The results display quantitatively the same structure as proton-deuteron polarization data, but discrepancies appear for angles corresponding to those near the minimum of the differential cross section. In this region the polarization is considerably more negative than in the proton-deuteron case, and both are more negative than current theoretical predictions.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A STUDY OF THE REACTIONS pi- p ---> K* LAMBDA, K* SIGMA AND K* Y1* (1385) AT 3.93-GeV/c

Yaffe, D. ; Abramovich, M. ; Chaloupka, V. ; et al.
Nucl.Phys.B 75 (1974) 365-387, 1974.
Inspire Record 80700 DOI 10.17182/hepdata.32197

We have investigated the final states K ∗0 (890)Σ, K ∗0 (890)Σ 0 and K ∗0 (890) Y 1 ∗0 (1385) produced in π − p interactions at 3.93 GeV/ c . We present the differential cross sections and spin density matrix elements for the resonances as functions of momentum transfer, as well as the gL and Σ 0 polarizations. The Σ 0 polarization is found to be positive and maximal. An amplitude analysis is performed for the K ∗ Λ and K ∗ Σ 0 reactions, and it is found that one natural parity transversity amplitude is dominant for the latter.

14 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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K- p ---> anti-K0 n AT 3-GeV/c, 4-GeV/c, 5-GeV/c AND 6-GeV/c

Ambats, I. ; Lesnik, A. ; Meyer, W.T. ; et al.
Nucl.Phys.B 77 (1974) 269-280, 1974.
Inspire Record 80725 DOI 10.17182/hepdata.32244

We present new measurements of the differential cross sections for K − p → K 0 n at 3, 4, 5 and 6 GeV/ c , where we have 248, 538, 761, and 376 events, respectively. Total cross sections are obtained by integrating the differential cross sections. We combine our data with other data from 3 to 15.7 GeV/ c to calculate an effective Regge trajectory for this reaction. Comparisons are made to predictions from exchange degeneracy and SU(3) sum rules.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Anti-proton - deuteron low-energy cross-section

Bizzarri, R. ; Guidoni, P. ; Marcelja, F. ; et al.
Nuovo Cim.A 22 (1974) 225-250, 1974.
Inspire Record 80565 DOI 10.17182/hepdata.37735

About 45000 interactions of antiprotons of kinetic energy between 57 and 170 MeV have been measured in a deuterium bubble chamber. Total and annihilation cross-sections have been determined at 9 values of the antiproton energy together with the differential crosssection dσ/dt for scattering events. In spite of the peculiar behaviour of the deuteron target at these low energies a reliable measure of the antiproton-neutron annihilation cross-section has been obtained.

2 data tables
Table 1

INELASTIC (ANNILATION + CHARGE EXCHANGE), SCATTERING (ELASTIC + INELASTIC) AND TOTAL CROSS SECTIONS. AUTHORS ALSO GIVE TOPOLOGICAL DECOMPOSITION OF THESE CROSS SECTIONS.

Table 2

SCATTERED ANTIPROTON ANGULAR DISTRIBUTION. THE OPTICAL POINT AT T=0 IS CALCULATED FROM THE TOTAL CROSS SECTION. SEPARATION INTO SCATTERING ON PROTONS AND ON NEUTRONS IS IMPOSSIBLE.