Leading particle distributions in 200 GeV/c p+A interactions

K. Abe , G. Alexander , E.D. Alyea , M. Badiak , P. Beilliere (1) , M. Bloomer , T. Bober , J.E. Brau , D.H. Brick , E.B. Brucker , W.M. Bugg , W. Busza , C. Castoldi , B. Cole , H.O. Cohn , G.T. Condo , R. Dimarco , R. Dolfini , T.A. Frank , T.A. Fuess , E. Galligarich , N. Gel'Fand , L. Grodzins , J. Grunhaus , E.S. Hafen , T. Handler , H.J. Hargis , P. Haridas , E.L. Hart , K. Hasegawa , Y. Hayashino , M. Higuchi , D. Huang , H.Z. Huang , R. Hulsizer , L. Introzzi , P.F. Jacques , M. Kalelkar , V. Kistiakowsky , T. Kitagaki , E.L. Koller , R.J. Ledoux , A. Levy , T. Ludlam , P. Lutz (1) , C. Milstene , J.L. Narjoux (1) , S. Noguchi , S.H. Oh , Y. Otani , R.J. Plano , I.A. Pless , S. Ratti , A. Rafatian , A.H. Rogers , M. Sato , P.E. Stamer , S.G. Steadman , R. Steiner , T.B. Stoughton , V. Suchorebrow , B. Taft , K. Tamai , S. Tanaka , S. Tether , P.C. Trepagnier , B.F. Wadsworth , M. Widgoff , Y. Wu , A. Yamaguchi , R.K. Yamamoto , H. Yuta

1 PCC - Physique Corpusculaire et Cosmologie - Collège de France

Distributions of the leading positive particle have been measured in collisions of a 200 GeV/c proton beam with hydrogen, Mg, Ag and Au targets using the FNAL Hybrid Spectrometer. Estimates of the rapidity loss of the projectile have been obtained as a function of the target mass, the multiplicity of negative particles and the number of recoil protons. We obtained a lower limit of the rapidity loss of 2.0±0.2 for central p+Au collisions. The impact parameter dependence of the momenta of the first few leading particles has also been investigated with important implications to estimates of energy densities obtained in central collisions.

Domaines: Physique [physics]

K. Abe, G. Alexander, E.D. Alyea, M. Badiak, P. Beilliere, et al.. Leading particle distributions in 200 GeV/c p+A interactions. Physics Letters B, 1988, 200 (3), pp.266-271. ⟨10.1016/0370-2693(88)90769-1⟩. ⟨hal-03184729⟩