Proton and antiproton distributions at midrapidity in proton-nucleus and sulphur-nucleus collisions | Zendy

I. G. Bearden | Zendy; H. Bøggild | Zendy; J. G. Boissevain | Zendy; J. Dodd | Zendy; S. Esumi | Zendy; C. Fabjan | Zendy; D. E. Fields | Zendy; A. Franz | Zendy; A. G. Hansen | Zendy; E. B. Holzer | Zendy; T. J. Humanic | Zendy; B. V. Jacak | Zendy; R. Jayanti | Zendy; H. Kalechofsky | Zendy; Y. Y. Lee | Zendy; M. Leltchouk | Zendy; B. Lörstad | Zendy; N. Maeda | Zendy; A. B. Medvedev | Zendy; A. Miyabayashi | Zendy; M. Murray | Zendy; S. Nishimura | Zendy; S.U. Pandey | Zendy; F. Piuz | Zendy; V. Polychronakos | Zendy; M. Potekhin | Zendy; G. Poulard | Zendy; A. Sakaguchi | Zendy; M. Sarabura | Zendy; M. Spegel | Zendy; J. Simon-Gillo | Zendy; W. Sondheim | Zendy; T. Sugitate | Zendy; J. P. Sullivan | Zendy; Y. Sumi | Zendy; H. Van Hecke | Zendy; W.J. Willis | Zendy; K. Wolf | Zendy; N. Xu | Zendy

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Proton and antiproton distributions at midrapidity in proton-nucleus and sulphur-nucleus collisions

Author(s) -

I. G. Bearden,

H. Bøggild,

J. G. Boissevain,

J. Dodd,

S. Esumi,

C. Fabjan,

D. E. Fields,

A. Franz,

A. G. Hansen,

E. B. Holzer,

T. J. Humanic,

B. V. Jacak,

R. Jayanti,

H. Kalechofsky,

Y. Y. Lee,

M. Leltchouk,

B. Lörstad,

N. Maeda,

A. B. Medvedev,

A. Miyabayashi,

M. Murray,

S. Nishimura,

S.U. Pandey,

F. Piuz,

V. Polychronakos,

M. Potekhin,

G. Poulard,

A. Sakaguchi,

M. Sarabura,

M. Spegel,

J. Simon-Gillo,

W. Sondheim,

T. Sugitate,

J. P. Sullivan,

Y. Sumi,

H. Van Hecke,

W.J. Willis,

K. Wolf,

N. Xu

Publication year - 1998

Publication title -

physical review c

Language(s) - English

Resource type - Journals

eISSN - 1089-490X

pISSN - 0556-2813

DOI - 10.1103/physrevc.57.837

Subject(s) - antiproton , nuclear physics , physics , proton , nucleon , nucleus , atomic physics , biology , microbiology and biotechnology

Experiment NA44 has measured proton and antiproton distributions atmid-rapidity in sulphur and proton collisions with nuclear targets at 200 and450 GeV/c per nucleon respectively. The inverse slopes of transverse massdistributions increase with system size for both protons and antiprotons butare slightly lower for antiprotons. this could happen if antiprotons areannihilated in the nuclear medium. The antiproton yield increases with systemsize and centrality and is largest at mid-rapdity. The proton yield alsoincreases with system size and centrality, but decreases from backward rapidityto midrapidity. The stopping of protons at these energies lies between the fullstopping and nuclear transparency scenarios. The data are in reasonableagreement with RQMD predictions except for the antiproton yields fromsulphur-nucleus collisions. PACS numbers 25.75.-q 13.85.-t 13.60.RjComment: 31 pages plain latex, 12 eps figures, submitted to Phys. Rev. C 1st author changed to I. G. Bearden. Figs 11 and 12 reordered and reference 17 corrected. Fig 12 made more explicit and the corresponding discussion clarifie

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