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28 March 2024
 
  » arxiv » 1501.3894

 Article overview


Subthreshold Xi- Production in Collisions of p(3.5 GeV)+Nb
G. Agakishiev ; O. Arnold ; A. Balanda ; D. Belver ; A.V. Belyaev ; J.C. Berger-Chen ; A. Blanco ; M. Böhmer ; J.L. Boyard ; P. Cabanelas ; S. Chernenko ; A. Dybczak ; E. Epple ; L. Fabbietti ; O.V. Fateev ; P. Finocchiaro ; P. Fonte ; J. Friese ; I. Fröhlich ; T. Galatyuk ; J.A. Garzon ; R. Gernhäuser ; K. Göbel ; M. Golubeva ; D. Gonzalez-Diaz ; F. Guber ; M. Gumberidze ; T. Heinz ; T. Hennino ; R. Holzmann ; A. Ierusalimov ; I. Iori ; A. Ivashkin ; M. Jurkovic ; B. Kämpfer ; T. Karavicheva ; I. Koenig ; W. Koenig ; B.W. Kolb ; G. Kornakov ; R. Kotte ; A. Krasa ; F. Krizek ; R. Krücken ; H. Kuc ; W. Kühn ; A. Kugler ; A. Kurepin ; V. Ladygin ; R. Lalik ; S. Lang ; K. Lapidus ; A. Lebedev ; T. Liu ; L. Lopes ; M. Lorenz ; L. Maier ; A. Mangiarotti ; J. Markert ; V. Metag ; B. Michalska ; J. Michel ; C. Müntz ; L. Naumann ; Y.C. Pachmayer ; M. Palka ; Y. Parpottas ; V. Pechenov ; O. Pechenova ; J. Pietraszko ; W. Przygoda ; B. Ramstein ; A. Reshetin ; A. Rustamov ; A. Sadovsky ; P. Salabura ; A. Schmah ; E. Schwab ; J. Siebenson ; Yu.G. Sobolev ; S. Spataro ; B. Spruck ; H. Ströbele ; J. Stroth ; C. Sturm ; A. Tarantola ; K. Teilab ; P. Tlusty ; M. Traxler ; R. Trebacz ; H. Tsertos ; T.Vasiliev ; V. Wagner ; M. Weber ; C. Wendisch ; J. Wüstenfeld ; S. Yurevich ; Y.V. Zanevsky ;
Date 16 Jan 2015
AbstractResults on the production of the double-strange cascade hyperon $mathrm{Xi^-}$ are reported for collisions of p,(3.5~GeV),+,Nb, studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18 at GSI Helmholtzzentrum for Heavy-Ion Research, Darmstadt. For the first time, subthreshold $mathrm{Xi^-}$ production is observed in proton-nucleus interactions. Assuming a $mathrm{Xi^-}$ phase-space distribution similar to that of $mathrm{Lambda}$ hyperons, the production probability amounts to $P_{mathrm{Xi^-}}=(2.0,pm0.4,mathrm{(stat)},pm 0.3,mathrm{(norm)},pm 0.6,mathrm{(syst)}) imes10^{-4}$ resulting in a $mathrm{Xi^-/(Lambda+Sigma^0)}$ ratio of $P_{mathrm{Xi^-}}/ P_{mathrm{Lambda+Sigma^0}}=(1.2pm 0.3,mathrm{(stat)}pm0.4,mathrm{(syst)}) imes10^{-2}$. Available model predictions are significantly lower than the estimated $mathrm{Xi^-}$ yield.
Source arXiv, 1501.3894
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