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Strangeness Production at low Q^2 in Deep-Inelastic ep Scattering at HERA

F.D. Aaron C. Alexa V. Andreev B. Antunovic S. Aplin A. Asmone A. Astvatsatourov A. Bacchetta S. Backovic A. Baghdasaryan E. Barrelet 1 W. Bartel M. Beckingham K. Begzsuren O. Behnke A. Belousov N. Berger J.C. Bizot 2 M.-O. Boenig V. Boudry 3 I. Bozovic-Jelisavcic J. Bracinik G. Brandt M. Brinkmann V. Brisson 2 D. Bruncko A. Bunyatyan G. Buschhorn L. Bystritskaya A.J. Campbell K.B. Cantun Avila F. Cassol-Brunner 4 K. Cerny V. Cerny V. Chekelian A. Cholewa J.G. Contreras J.A. Coughlan G. Cozzika 5 J. Cvach J.B. Dainton K. Daum M. De'Ak Y. de Boer B. Delcourt 2 M. del Degan J. Delvax A. de Roeck E.A. de Wolf C. Diaconu 4 V. Dodonov A. Dossanov A. Dubak G. Eckerlin V. Efremenko S. Egli R. Eichler A. Eliseev E. Elsen S. Essenov A. Falkiewicz P.J.W. Faulkner L. Favart A. Fedotov R. Felst J. Feltesse 5 J. Ferencei M. Fleischer A. Fomenko E. Gabathuler J. Gayler S. Ghazaryan A. Glazov I. Glushkov L. Goerlich M. Goettlich N. Gogitidze M. Gouzevitch 3 C. Grab T. Greenshaw B.R. Grell G. Grindhammer S. Habib D. Haidt M. Hansson C. Helebrant R.C.W. Henderson E. Hennekemper H. Henschel G. Herrera M. Hildebrandt K.H. Hiller D. Hoffmann 4 R. Horisberger A. Hovhannisyan T. Hreus M. Jacquet 2 M.E. Janssen X. Janssen V. Jemanov L. J¨onsson A.W. Jung H. Jung M. Kapichine J. Katzy I.R. Kenyon C. Kiesling M. Klein C. Kleinwort T. Klimkovich T. Kluge A. Knutsson R. Kogler V. Korbel P. Kostka M. Kraemer K. Krastev J. Kretzschmar A. Kropivnitskaya K. Krüger K. Kutak M.P.J. Landon W. Lange G. Laˇstoviˇcka-Medin P. Laycock A. Lebedev G. Leibenguth V. Lendermann S. Levonian G. Li 2 K. Lipka A. Liptaj B. List J. List N. Loktionova R. Lopez-Fernandez V. Lubimov A.-I. Lucaci-Timoce L. Lytkin A. Makankine E. Malinovski P. Marage Ll. Marti H.-U. Martyn S.J. Maxfield A. Mehta K. Meier A.B. Meyer H. Meyer J. Meyer V. Michels S. Mikocki I. Milcewicz-Mika F. Moreau 3 A. Morozov J.V. Morris M.U. Mozer M. Mudrinic K. Müller P. Mur'ın K. Nankov B. Naroska Th. Naumann P.R. Newman C. Niebuhr A. Nikiforov G. Nowak K. Nowak M. Nozicka B. Olivier J.E. Olsson S. Osman D. Ozerov V. Palichik I. Panagouliasl M. Pandurovic Th. Papadopouloul C. Pascaud 2 G.D. Patel O. Pejchal H. Peng E. Perez 5 A. Petrukhin I. Picuric S. Piec D. Pitzl R. Plaˇcakyt˙e R. Polifka B. Povh T. Preda V. Radescu A.J. Rahmat N. Raicevic A. Raspiareza T. Ravdandorj P. Reimer E. Rizvi P. Robmann B. Roland R. Roosen A. Rostovtsev M. Rotaru J.E. Ruiz Tabasco Z. Rurikova S. Rusakov D. Salek F. Salvaire D.P.C. Sankey M. Sauter E. Sauvan 4 S. Schmidt S. Schmitt C. Schmitz L. Schoeffel 5 A. Schöning H.-C. Schultz-Coulon F. Sefkow R.N. Shaw-West I. Sheviakov L.N. Shtarkov S. Shushkevich T. Sloan I. Smiljanic P. Smirnov Y. Soloviev P. Sopicki D. South V. Spaskov A. Specka 3 Z. Staykova M. Steder B. Stella U. Straumann D. Sunar T. Sykora V. Tchoulakov G. Thompson P.D. Thompson T. Toll F. Tomasz T.H. Tran 2 D. Traynor T.N. Trinh 4 P. Truöl I. Tsakov B. Tseepeldorj I. Tsurin J. Turnau E. Tzamariudaki K. Urban A. Valk'Arov'A Corentin Vallée 4 P. van Mechelen A. Vargas Y. Vazdik S. Vinokurova V. Volchinski D. Wegener M. Wessels Ch. Wissing E. W¨unsch V. Yeganov J. Žáček J. Zalesak Zhiqing Zhang 2 A. Zhelezov A. Zhokin Y.C. Zhu T. Zimmermann H. Zohrabyan F. Zomer 2
Abstract : The production of neutral strange hadrons is investigated using deep-inelastic scattering events measured with the H1 detector at HERA. The measurements are made in the phase space defined by the negative four-momentum transfer squared of the photon 2 < Q^2 < 100 GeV^2 and the inelasticity 0.1 < y < 0.6. The K_s and Lambda production cross sections and their ratios are determined. K_s production is compared to the production of charged particles in the same region of phase space. The Lambda - anti-Lambda asymmetry is also measured and found to be consistent with zero. Predictions of leading order Monte Carlo programs are compared to the data.
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Submitted on : Thursday, October 23, 2008 - 12:09:39 PM
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F.D. Aaron, C. Alexa, V. Andreev, B. Antunovic, S. Aplin, et al.. Strangeness Production at low Q^2 in Deep-Inelastic ep Scattering at HERA. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2009, 61, pp.185-205. ⟨10.1140/epjc/s10052-009-0995-1⟩. ⟨in2p3-00333457⟩

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