Rodrigues, P.A.
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Differential cross-sections of pi- p ---> gamma n for 317, 452, and 491 mev/c incident pion momentum

Berardo, P.A. ; Haddock, R.P. ; Nefkens, B.M.K. ; et al.
Phys.Rev.D 9 (1974) 621-643, 1974.
Inspire Record 93116 DOI 10.17182/hepdata.21950

The differential cross sections of π−p→γn at center-of-mass energy Ẽ=1363, 1337, and 1245 MeV are presented. The angular distributions are compared with recent γn→π−p experiments. Though the cross sections for π−p→γn are somewhat lower than those for the inverse reaction, when all uncertainties are considered, we find that our data are in acceptable agreement at all three energies with the inverse reaction determined from π−π+ ratio measurements, in support of time-reversal invariance. The agreement with bubble-chamber measurements at Ẽ=1363 and 1337 MeV is less satisfactory. The isotensor dip test applied to our data is inconclusive. Our measurements are compared with many multipole analyses, disagreeing with most, in particular with pure fixed- t dispersion relation calculations. We find no evidence, in the sense suggested by Donnachie, for the classification of the P11(1470) resonance in an SU(3) antidecuplet. The data are consistent with a small radiative decay of the P11(1470) resonance, as predicted by quark models.

6 data tables
Table 1

Axis error includes +- 6/6 contribution.

Table 2

Axis error includes +- 4.5/4.5 contribution.

Table 3

Axis error includes +- 4.2/4.2 contribution.

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Investigation of elastic p d scattering at 5 gev in the interference range of coulomb and nuclear interactions

Zlatanov, Z.M. ; Khristov, L.G. ; Devensky, P.A. ;
Yad.Fiz. 17 (1973) 93-97, 1973.
Inspire Record 85190 DOI 10.17182/hepdata.19247

None

3 data tables
Table 1

No description provided.

Table 2

FROM INTEGRATING D(SIG)/DOMEGA.

Table 3

REAL/IMAG FOR FORWARD AMPLITUDE FROM FIT TO D(SIG)/DOMEGA IN COULOMB-NUCLEAR INTERFERENCE REGION. GLAUBER MODEL USED TO DEDUCE VALUE FOR NEUTRON TARGET.


Production of Hadrons with Large Transverse Momentum at 200-GeV and 300-GeV.

Cronin, J.W. ; Frisch, Henry J. ; Shochet, M.J. ; et al.
Phys.Rev.Lett. 31 (1973) 1426-1429, 1973.
Inspire Record 81959 DOI 10.17182/hepdata.21382

Differential cross sections as a function of transverse momentum are presented for the production at ∼90° (in the c.m. system) of π±, K±, p, and p¯ in p-nucleus collisions at incident proton energies of 200 and 300 GeV.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Average charged particle multiplicity and topological cross-sections in 50-GeV/c and 69-GeV/c p p interactions

Ammosov, V.V. ; Boitsov, V.N. ; Ermolov, P.F. ; et al.
Phys.Lett.B 42 (1972) 519-521, 1972.
Inspire Record 74383 DOI 10.17182/hepdata.28174

In an exposure of the chamber Mirabelle at the Serpukhov accelerator, 1 943 interactions at 50 GeV/ c and 8 959 at 69 GeV/ c have been observed. Topological cross sections and charged multiplicity distributions are presented. The average charged multiplicities found are respectively 5.32 ± 0.13 and 5.89 ± 0.07.

1 data table
Table 1

2PRONG INELASTIC CROSS SECTIONS DERIVED BY SUBTRACTION OF OTHER PRONG CROSS SECTIONS AND KNOWN ELASTIC MEASUREMENTS FROM THE TOTAL.


Measurement of the differential cross-section for pi- p ---> n pi0 at 317, 452, and 491 mev/c

Berardo, P.A. ; Haddock, R.P. ; Nefkens, B.M.K. ; et al.
Phys.Rev.D 6 (1972) 756-766, 1972.
Inspire Record 73968 DOI 10.17182/hepdata.3558

Seventeen differential cross sections of the pion-nucleon charge-exchange reaction have been measured at total center-of-mass energies of 1245, 1337, and 1363 MeV. Most measurements are based on the neutron-photon coincidence method, using carefully calibrated neutron counters and an efficient, large-area photon detector. The results are used to test the predictions of charge independence, with which they agree. The results also confirm the Ayed-Bareyre-Sonderegger phase-degeneracy hypothesis at θ̃π0=180°.

7 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurements of the symmetries in the differential cross sections for anti-p p ---> anti-p p and anti-p p ---> pi- pi+ using polarized protons

Ehrlich, R.D. ; Etkin, A. ; Glodis, P. ; et al.
Phys.Rev.Lett. 28 (1972) 1147-1150, 1972.
Inspire Record 75507 DOI 10.17182/hepdata.21461

We report measured asymmetries as a function of polar scattering angle for the reactions p¯p→π−π+ and p¯p→p¯p, using a polarized proton target. The annihilation data, obtained at a p¯ momentum of 1.64 GeV/c, are the first asymmetry data to be collected for this channel. A fit of these data and published differential cross section data is made by a partial-wave expansion, and the results are compared with a previous analysis. The elastic scattering data, obtained at 1.64 and 2.55 GeV/c, are fitted with an eight-parameter strong-absorption model.

1 data table
Table 1

No description provided.


New evidence for the p-11(1470) resonance in pi- p ---> n pi0 below 600 mev

Hauser, M.G. ; Chen, K.W. ; Crean, P.A. ;
Phys.Lett.B 35 (1971) 252-256, 1971.
Inspire Record 69248 DOI 10.17182/hepdata.28485

The differential cross section for π − p → n π o has been measured in detail from 150 to 600 MeV. The backward cross section has a previously unobserved dramatic dip at 425 MeV. We interpret this dip in terms of interference between the P 33 (1236) and the P 11 (1470) resonances. These data provide strong evidence for the adequacy of the phase shift solutions in this energy range.

116 data tables
Table 1

SCALED TO AGREE WITH SOLUTION AT 225 MEV AND THEN INTERPOLATED.

Table 2

SCALED TO AGREE WITH SOLUTION AT 225 MEV AND THEN INTERPOLATED.

Table 3

SCALED TO AGREE WITH SOLUTION AT 225 MEV AND THEN INTERPOLATED.

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P p and p d elastic scattering at 50 and 70 gev

Devenski, P.A. ; Zayachki, V.I. ; Zlatanov, Z.M. ; et al.
Yad.Fiz. 14 (1971) 367-370, 1971.
Inspire Record 69427 DOI 10.17182/hepdata.19274

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Asymmetry measurements for elastic scattering of k+ mesons by polarized protons

Ehrlich, R.D. ; Etkin, A. ; Glodis, P. ; et al.
Phys.Rev.Lett. 26 (1971) 925-928, 1971.
Inspire Record 69016 DOI 10.17182/hepdata.21466

We report measured values of the asymmetry in the elastic scattering of K+ mesons from polarized protons. The data were obtained at fourteen incident K+ momenta from 1.33 to 2.58 GeVc; the approximate angular range covered was −0.85

14 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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K+-Meson Production in p-p Collisions at 2.5-3.0 GeV

Hogan, W.J. ; Piroue, P.A. ; Smith, A.J.S. ;
Phys.Rev. 166 (1968) 1472-1481, 1968.
Inspire Record 54415 DOI 10.17182/hepdata.26524

Differential cross sections as a function of momentum are presented for the production of K+ mesons in p−p collisions at incident proton energies of 2.54, 2.88, and 3.03 GeV. The measurements were made at 20°, 30°, and 40° relative to the direction of the internal proton beam of the Princeton-Pennsylvania accelerator. At 2.54 GeV, the results follow closely the predictions from phase space (with 60% K+ΣN and 40% K+Λp in the final state). At 2.88 and 3.03 GeV, however, there is a definite disagreement with phase space. The data are compared to the predictions of three models: (1) a model based on the assumption that K's are produced via p+p→K++X+, where X+ is a B=2, S=−1 resonance which decays into a nucleon+hyperon; (2) the isobar model; and (3) the one-pion-exchange model. Model (1) is found to be inconclusive, model (2) is inadequate, and model (3) is partly successful in predicting total cross sections, but not in interpreting the detailed experimental observations.

7 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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