Study of Sigma(1385) and Xi(1321) hyperon and antihyperon production in deep inelastic muon scattering

C. Adolph , M. Alekseev , V.Yu. Alexakhin , Yu. Alexandrov , G.D. Alexeev , A. Amoroso , A. Austregesilo , B. Badelek

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F. Balestra J. Barth G. Baum Y. Bedfer A. Berlin J. Bernhard R. Bertini K. Bicker J. Bieling R. Birsa J. Bisplinghoff P. Bordalo F. Bradamante C. Braun A. Bravar A. Bressan M. Buechele E. Burtin L. Capozza M. Chiosso S.U. Chung A. Cicuttin M.L. Crespo S. Dalla Torre S.S. Dasgupta S. Dasgupta O.Yu. Denisov S.V. Donskov N. Doshita V. Duic W. Duennweber M. Dziewiecki A. Efremov C. Elia P.D. Eversheim W. Eyrich M. Faessler A. Ferrero A. Filin M. Finger M. Finger Jr. H. Fischer C. Franco N. du Fresne von Hohenesche J.M. Friedrich V. Frolov R. Garfagnini F. Gautheron O.P. Gavrichtchouk S. Gerassimov R. Geyer M. Giorgi I. Gnesi B. Gobbo S. Goertz S. Grabmueller A. Grasso B. Grube R. Gushterski A. Guskov T. Guthoerl F. Haas D. von Harrach F.H. Heinsius F. Herrmann C. Hess F. Hinterberger Ch. Hoeppner N. Horikawa N. d'Hose S. Huber S. Ishimoto Yu. Ivanshin T. Iwata R. Jahn V. Jary P. Jasinski R. Joosten E. Kabuss D. Kang B. Ketzer G.V. Khaustov Yu.A. Khokhlov Yu. Kisselev F. Klein K. Klimaszewski J.H. Koivuniemi V.N. Kolosov K. Kondo K. Koenigsmann I. Konorov V.F. Konstantinov A.M. Kotzinian O. Kouznetsov M. Kraemer Z.V. Kroumchtein N. Kuchinski F. Kunne K. Kurek R.P. Kurjata A.A. Lednev A. Lehmann S. Levorato J. Lichtenstadt A. Maggiora A. Magnon N. Makke G.K. Mallot A. Mann C. Marchand A. Martin J. Marzec H. Matsuda T. Matsuda G. Meshcheryakov W. Meyer T. Michigami Yu.V. Mikhailov Y. Miyachi A. Morreale A. Nagaytsev T. Nagel F. Nerling S. Neubert D. Neyret V.I. Nikolaenko J. Novy W.-D. Nowak A.S. Nunes A.G. Olshevsky M. Ostrick R. Panknin D. Panzieri B. Parsamyan S. Paul G. Piragino S. Platchkov J. Pochodzalla J. Polak V.A. Polyakov J. Pretz M. Quaresma C. Quintans S. Ramos G. Reicherz E. Rocco V. Rodionov E. Rondio N.S. Rossiyskaya D.I. Ryabchikov V.D. Samoylenko A. Sandacz M.G. Sapozhnikov S. Sarkar I.A. Savin G. Sbrizzai P. Schiavon C. Schill T. Schlueter A. Schmidt K. Schmidt L. Schmitt H. Schmieden K. Schoenning S. Schopferer M. Schott O.Yu. Shevchenko L. Silva L. Sinha S. Sirtl S. Sosio F. Sozzi A. Srnka L. Steiger M. Stolarski M. Sulc R. Sulej H. Suzuki P. Sznajder S. Takekawa J. Ter Wolbeek S. Tessaro F. Tessarotto F. Thibaud S. Uhl I. Uman M. Vandenbroucke M. Virius L. Wang T. Weisrock M. Wilfert R. Windmolders W. Wislicki H. Wollny K. Zaremba M. Zavertyaev E. Zemlyanichkina N. Zhuravlev M. Ziembicki

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classification ✦ hep-ex nucl-ex

keywords sigmalambdawereantihyperonheavyhyperonhyperonsmuon

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Large samples of \Lambda, \Sigma(1385) and \Xi(1321) hyperons produced in deep-inelastic muon scattering off a ^6LiD target were collected with the COMPASS experimental setup at CERN. The relative yields of \Sigma(1385)^+, \Sigma(1385)^-, \bar{\Sigma}(1385)^-, \bar{\Sigma}(1385)^+, \Xi(1321)^-, and \bar{\Xi}(1321)^+ hyperons decaying into \Lambda(\bar{\Lambda})\pi were measured. The heavy hyperon to \Lambda and heavy antihyperon to \bar{\Lambda} yield ratios were found to be in the range 3.8% to 5.6% with a relative uncertainty of about 10%. They were used to tune the parameters relevant for strange particle production of the LEPTO Monte Carlo generator.

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Study of Sigma(1385) and Xi(1321) hyperon and antihyperon production in deep inelastic muon scattering

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