Spectra and correlations of $\Lambda$ and $\bar\Lambda$ produced in 340-GeV/c $\Sigma^{-}$ + C and 260-GeV/c n + C interactions

M.I. Adamovich , Yu.A. Alexandrov , S.P. Baranov , D. Barberis , M. Beck , C. Berat (1) , W. Beusch , M. Boss , S. Brons , W. Brueckner , M. Buenerd (1) , C. Busch , C. Buescher , F. Charignon (1) , J. Chauvin (1) , E.A. Chudakov , U. Dersch , F. Dropmann , J. Engelfried , F. Faller , A. Fournier (1) , S.G. Gerassimov , M. Godbersen , P. Grafstroem , T. Haller , M. Heidrich , E. Hubbard , R.B. Hurst , K. Koenigsmann , I. Konorov , N. Keller , K. Martens , P. Martin (1) , S. Masciocchi , R. Michaels , U. Mueller , H. Neeb , D. Newbold , C. Newsom , S. Paul , J. Pochodzalla , I. Potashnikova , B. Povh , R.D. Ransome , Zhuoxiang Ren , M. Rey-Campagnolle (1) , G. Rosner , L. Rossi , H. Rudolph , C. Scheel , L. Schmitt , H.W. Siebert , A. Simon , V.J. Smith , O. Thilmann , A. Trombini , E. Vesin (1) , B. Volkemer , K. Vorwalter , T. Waelcher , G. Waelder , R. Werding , E. Wittmann , M.V. Zavertyaev

1 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

We have measured the production of strange baryons and antibaryons in 340-GeV/c Σ−+C and 260-GeV/c n+C interactions. The single xF distributions show the expected leading particle effect, and the single pt2 distributions show a distinct nonthermal behavior. The xF distributions of Λ-Λ pairs indicate two different phase space distributions for the two coincident baryons. On the other hand two Λ¯’s show identical distributions. Momentum conservation during the formation process may represent a significant source for the observed behavior. (APS)

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

M.I. Adamovich, Yu.A. Alexandrov, S.P. Baranov, D. Barberis, M. Beck, et al.. Spectra and correlations of $\Lambda$ and $\bar\Lambda$ produced in 340-GeV/c $\Sigma^{-}$ + C and 260-GeV/c n + C interactions. Physical Review C, 2002, 65, pp.042202. ⟨10.1103/PhysRevC.65.042202⟩. ⟨in2p3-00011438⟩