Hanson, P.
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Sigma- production in high-energy proton interactions

Hungerbuehler, V. ; Majka, R. ; Marx, J.N. ; et al.
Phys.Rev.Lett. 30 (1973) 1234-1237, 1973.
Inspire Record 84497 DOI 10.17182/hepdata.21625

Momentum spectra for forward Σ− production on beryllium by protons of momentum 25.8 and 29.4 GeVc are presented. Data for the two primary proton momenta are compared for scaling behavior in the invariant cross section. In addition, the observed single-particle momentum distributions are compared with single-particle spectra from other inclusive reactions initiated by protons.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Recoil-proton polarization in neutral-pion photoproduction and in proton Compton scattering

Deutsch, M. ; Golub, L. ; Kijewski, P. ; et al.
Phys.Rev.Lett. 29 (1972) 1752-1755, 1972.
Inspire Record 84562 DOI 10.17182/hepdata.21426

We have measured the polarization of the recoil proton in the reactions γp→π0p and γp→γp for incident photon energies between 3 and 7 GeV, and t values from -0.2 to -0.65 GeV2. The polarization in neutral-pion production varies from 0 to -1 over this range. Contrary to expectation, it does not agree completely with the polarized-target asymmetry.

1 data table
Table 1

No description provided.


Large angle pi+ p and k+ p elastic scattering at 13.8 gev/c

Rubinstein, R. ; Cornillon, P. ; Grindhammer, Guenter ; et al.
Phys.Rev.Lett. 30 (1973) 1010-1012, 1973.
Inspire Record 84502 DOI 10.17182/hepdata.21417

The differential cross section for π+p elastic scattering has been measured at 13.8 GeVc for 0.7<|t|<3.8(GeVc)2. The cross section is found to be equal to that previously obtained for π−p elastic scattering, except in the region |t|=2.8 (GeVc)2, where the π+p data do not show the prominent dip observed in π−p scattering. Data have also been obtained for 13.8−GeVc K+p elastic scattering for 0.8<|t|<2.2 (GeVc)2.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Pi0 photoproduction from neutrons

Osborne, A.M. ; Brownam, A. ; Hanson, K. ; et al.
Phys.Rev.Lett. 29 (1972) 1621-1624, 1972.
Inspire Record 84571 DOI 10.17182/hepdata.21431

We have measured the ratio of the cross section for γ+n→π0+n to the cross section for γ+p→π0+p at 4.7 and 8.2 GeV. The measurements were made by detecting the recoil nucleons in coincidence with the decay γ rays of the π0's produced from a deuterium target. At 4.7 GeV the cross-section ratio, R≡σ(γ+n→π0+n)σ(γ+p→π0+p), is less than 1.0 at low t, with an indication of a dip at about t=−0.7(GeVc)2, and rises to 1.0 at high t. The ratios at the higher energy have less structure and are uniformly closer to 1.0.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Cross Sections and Charged Particle Multiplicities at 102 GeV/c and 405 GeV/c.

Bromberg, C. ; Chaney, D. ; Cohen, Daniel H. ; et al.
Phys.Rev.Lett. 31 (1973) 1563-1566, 1973.
Inspire Record 81962 DOI 10.17182/hepdata.21360

We have measured the total inelastic cross section (σinel) and charged-particle multiplicities obtained in pp collisions at 405 GeV/c. The data are from a preliminary 12 000-picture bubble-chamber exposure. We find σinel=32.8±1.0 mb; the low moments of the multiplicity distribution for negative particles are 〈n−〉=3.50±0.07, D−=2.37±0.05, f2−=2.1±0.2, and f3−=0.1±0.9. We also present updated results at 102 GeV/c.

3 data tables
Table 1

SUPERCEDES PRELIMINARY RESULTS IN J. W. CHAPMAN ET AL., PRL 29, 1686 (1972).

Table 2

No description provided.

Table 3

FIT TO ELASTIC DIFFERENTIAL CROSS SECTION FOR 0.05 < -T < 0.7 GEV**2.


Hadron pair production by electron-positron colliding beams

Barbiellini, G. ; Grilli, M. ; Iarocci, E. ; et al.
Lett.Nuovo Cim. 6S2 (1973) 557-565, 1973.
Inspire Record 86306 DOI 10.17182/hepdata.37335

None

1 data table
Table 1

THIS HADRON PAIR CROSS SECTION PROVIDES ONLY AN UPPER LIMIT TO THE PION FORM FACTOR ABOVE 1.5 GEV SINCE KAON PRODUCTION IS NOT DISTINGUISHED.


Measurement of inclusive photoproduction at 3.2 gev and comparison with electroproduction

Burfeindt, H. ; Buschhorn, G. ; Genzel, H. ; et al.
Phys.Lett.B 43 (1973) 345-348, 1973.
Inspire Record 84913 DOI 10.17182/hepdata.45255

Inclusive photoproduction cross sections for pions, kaons and protons have been measured in the photon fragmentation region and are compared with recent electroproduction data at q 2 = 1.16 (GeV/ c ) 2 . If the cross sections are normalized to the total hadronic cross sections at q 2 = 0 and q 2 = 1.16 (GeV/ c ) 2 , respectively, we observe that more pions, about an equal number of protons, but fewer kaons are found in the photoproduction case for x ≥ 0.3.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Observation of increasing charged multiplicity as a function of transverse momentum in 28.5-gev/c p p interactions

Ramanauskas, A. ; Anderson, E.W. ; Fisher, G.P. ; et al.
Phys.Rev.Lett. 31 (1973) 1371-1374, 1973.
Inspire Record 83758 DOI 10.17182/hepdata.47029

We have measured the mean charged multiplicity n¯CH as a function of transverse momentum p⊥ of the forward proton in the reaction p+p→p+MM for five intervals of missing mass (MM) using our Multiparticle Argo Spectrometer System. We observe an increase of n¯CH for p⊥>1 GeV/c.

1 data table
Table 1

No description provided.


Measurement of the polarization parameter of the reactions pi- p ---> pi0 n and eta n at 5 and 8 gev/c

Bonamy, P. ; Borgeaud, P. ; Crozon, M. ; et al.
Nucl.Phys.B 52 (1973) 392-402, 1973.
Inspire Record 84261 DOI 10.17182/hepdata.50104

Measurements of the polarization parameter of the reactions π − p → π 0 n and π − p → η n at 4.90 and 7.85 GeV/ c and for a squared four-momentum transfer − t ranging from 0.1 to 2.0 (GeV/ c ) 2 have been achieved by using a butanol polarized proton target and detecting only the two γ's from the neutral meson decay. The background due to events involving bound protons has been separately measured and subtracted out. A large positive polarization has been found for the reaction π − p → π 0 n. It is consistent with other pion-nucleon scattering data connected by isospin conservation. The polarization for the reaction π − p → η n is not significantly different from zero within the large experimental errors.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Inclusive single-particle distributions in $\pi^{\pm}$ $p$ reactions at 8 and 16 {GeV/c}

Bosetti, P. ; Grassler, H. ; Kirk, H. ; et al.
Nucl.Phys.B 54 (1973) 141-160, 1973.
Inspire Record 87988 DOI 10.17182/hepdata.811

Invariant single-particle cross sections for pion and proton production in π ± p interactions at 8 and 16 GeV/ c are presented in terms of integrated distributions as functions of x , reduced rapidity ζ and p ⊥ 2 , and also in terms of double differential cross sections E d 2 σ /(d x d p ⊥ 2 ) and d ζ d p ⊥ 2 ). A comparison of π ± and π − induced reactions is made and the energy dependence is discussed. It is shown that the single-particle structure function cannot be factorized in its dependece on transverse and longitudinal momentum. For the beam-unlike pion, there is an indication for factorizability in terms of rapidity and transverse momentum in a small central region.

73 data tables
Table 1

No description provided.

Table 2

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Table 3

No description provided.

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