Σ−-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism

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ID: 270721
2009
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Abstract
Data collected around (sqrt{s}=91) GeV by the OPAL experiment at the LEP e+e− collider are used to study the mechanism of baryon formation. As the signature, the fraction of Σ− hyperons whose baryon number is compensated by the production of a (overline{Sigma^{-}},overline{Lambda}) or (overline{Xi^{-}}) antihyperon is determined. The method relies entirely on quantum number correlations of the baryons, and not rapidity correlations, making it more model independent than previous studies. Within the context of the JETSET implementation of the string hadronization model, the diquark baryon production model without the popcorn mechanism is strongly disfavored with a significance of 3.8 standard deviations including systematic uncertainties. It is shown that previous studies of the popcorn mechanism with (Lambda overline{Lambda}) and (mathrm{p}uppi overline{mathrm{p}}) correlations are not conclusive, if parameter uncertainties are considered.
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Authors Giovanni Abbiendi,The OPAL Collaboration,C. Ainsley,P. F. Åkesson,G. Alexander,G. Anagnostou,K. J. Anderson,S. Asai,D. Axen,Ian Bailey,E. Barberio,T. Barillari,Roger Barlow,R. J. Batley,P. Bechtle,T. Behnke,K. W. Bell,P. J. Bell,Gideon Bella,Alain Bellerive,G. Benelli,S. Bethke,O. Biebel,O. Boeriu,P. Bock,M. Boutemeur,S. Braibant,R. M. Brown,H. J. Burckhart,S. Campana,P. Capiluppi,R. K. Carnegie,A. A. Carter,J. R. Carter,C. Y. Chang,David Charlton,C. Ciocca,A. Csilling,M. Cuffiani,S. Dado,M. Dallavalle,A. De Roeck,E. A. De Wolf,K. Desch,B. Dienes,J. Dubbert,E. Duchovni,G. Duckeck,I. P. Duerdoth,E. Etzion,F. Fabbri,P. Ferrari,F. Fiedler,I. Fleck,M. Ford,A. Frey,P. Gagnon,J. W. Gary,C. Geich-Gimbel,Paolo Giacomelli,M. Giunta,J. Goldberg,E. Gross,J. Grunhaus,M. Gruwé,A. Gupta,C. Hajdu,M. Hamann,G. G. Hanson,A. Harel,Michael Hauschild,Christopher Hawkes,R. Hawkings,G. Herten,R. D. Heuer,John Hill,D. Horváth,P. Igo-Kemenes,K. Ishii,H. Jeremie,P. Jovanovic,T. R. Junk,J. Kanzaki,Dean Karlen,Kiyotomo Kawagoe,T. Kawamoto,Richard Keeler,R. G. Kellogg,B. W. Kennedy,S. Kluth,T. Kobayashi,M. Kobel,S. Komamiya,T. Krämer,A. Krasznahorkay,P. Krieger,J. Von Krogh,T. Kuhl,M. Kupper,George Lafferty,H. Landsman,D. Lanske,D. Lellouch,J. Letts,L. Levinson,J. Lillich,Stephen Lloyd,F. K. Loebinger,J. Lu,A. Ludwig,J. Ludwig,W. Mader,S. Marcellini,A. J. Martin,T. Mashimo,P. Mättig,J. McKenna,Robert McPherson,F. Meijers,W. Menges,F. S. Merritt,H. Mes,N. Meyer,A. Michelini,Satoshi Mihara,G. Mikenberg,D. J. Miller,W. Mohr,T. Mori,A. Mutter,K. Nagai,I. Nakamura,H. Nanjo,H. A. Neal,S. W. O’Neale,A. Oh,M. J. Oreglia,S. Orito,C. Pahl,Gabriella Pásztor,J. R. Pater,J. E. Pilcher,J. Pinfold,D. E. Plane,O. Pooth,Mariusz Przybycien,A. Quadt,Klaus Rabbertz,C. Rembser,P. Renkel,J. M. Roney,A. M. Rossi,Y. Rozen,K. Runge,Kirsten Sachs,T. Saeki,E. K. G. Sarkisyan,A. D. Schaile,O. Schaile,P. Scharff-Hansen,J. Schieck,T. Schörner-Sadenius,M. Schröder,M. Schumacher,R. Seuster,Tara Shears,B. C. Shen,P. Sherwood,A. Skuja,A. M. Smith,R. Sobie,Stefan Soldner-Rembold,F. Spano,Achim Stahl,D. Strom,R. Ströhmer,S. Tarem,M. Tasevsky,R. Teuscher,M. A. Thomson,E. Torrence,D. Toya,I. Trigger,Z. Trócsányi,E. Tsur,Miriam Watson,I. Ueda,B. Ujvári,C. F. Vollmer,P. Vannerem,R. Vértesi,M. Verzocchi,H. Voss,J. Vossebeld,C. P. Ward,D. R. Ward,Peter Watkins,A. T. Watson,Nigel Watson,P. S. Wells,Thorsten Wengler,N. Wermes,D. Wetterling,Graham Wilson,J. A. Wilson,G. Wolf,T. R. Wyatt,S. Yamashita,D. Zer-Zion,L. Zivkovic;Giovanni Abbiendi;The OPAL Collaboration;C. Ainsley;P. F. Åkesson;G. Alexander;G. Anagnostou;K. J. Anderson;S. Asai;D. Axen;Ian Bailey;E. Barberio;T. Barillari;Roger Barlow;R. J. Batley;P. Bechtle;T. Behnke;K. W. Bell;P. J. Bell;Gideon Bella;Alain Bellerive;G. Benelli;S. Bethke;O. Biebel;O. Boeriu;P. Bock;M. Boutemeur;S. Braibant;R. M. Brown;H. J. Burckhart;S. Campana;P. Capiluppi;R. K. Carnegie;A. A. Carter;J. R. Carter;C. Y. Chang;David Charlton;C. Ciocca;A. Csilling;M. Cuffiani;S. Dado;M. Dallavalle;A. De Roeck;E. A. De Wolf;K. Desch;B. Dienes;J. Dubbert;E. Duchovni;G. Duckeck;I. P. Duerdoth;E. Etzion;F. Fabbri;P. Ferrari;F. Fiedler;I. Fleck;M. Ford;A. Frey;P. Gagnon;J. W. Gary;C. Geich-Gimbel;Paolo Giacomelli;M. Giunta;J. Goldberg;E. Gross;J. Grunhaus;M. Gruwé;A. Gupta;C. Hajdu;M. Hamann;G. G. Hanson;A. Harel;Michael Hauschild;Christopher Hawkes;R. Hawkings;G. Herten;R. D. Heuer;John Hill;D. Horváth;P. Igo-Kemenes;K. Ishii;H. Jeremie;P. Jovanovic;T. R. Junk;J. Kanzaki;Dean Karlen;Kiyotomo Kawagoe;T. Kawamoto;Richard Keeler;R. G. Kellogg;B. W. Kennedy;S. Kluth;T. Kobayashi;M. Kobel;S. Komamiya;T. Krämer;A. Krasznahorkay;P. Krieger;J. Von Krogh;T. Kuhl;M. Kupper;George Lafferty;H. Landsman;D. Lanske;D. Lellouch;J. Letts;L. Levinson;J. Lillich;Stephen Lloyd;F. K. Loebinger;J. Lu;A. Ludwig;J. Ludwig;W. Mader;S. Marcellini;A. J. Martin;T. Mashimo;P. Mättig;J. McKenna;Robert McPherson;F. Meijers;W. Menges;F. S. Merritt;H. Mes;N. Meyer;A. Michelini;Satoshi Mihara;G. Mikenberg;D. J. Miller;W. Mohr;T. Mori;A. Mutter;K. Nagai;I. Nakamura;H. Nanjo;H. A. Neal;S. W. O’Neale;A. Oh;M. J. Oreglia;S. Orito;C. Pahl;Gabriella Pásztor;J. R. Pater;J. E. Pilcher;J. Pinfold;D. E. Plane;O. Pooth;Mariusz Przybycien;A. Quadt;Klaus Rabbertz;C. Rembser;P. Renkel;J. M. Roney;A. M. Rossi;Y. Rozen;K. Runge;Kirsten Sachs;T. Saeki;E. K. G. Sarkisyan;A. D. Schaile;O. Schaile;P. Scharff-Hansen;J. Schieck;T. Schörner-Sadenius;M. Schröder;M. Schumacher;R. Seuster;Tara Shears;B. C. Shen;P. Sherwood;A. Skuja;A. M. Smith;R. Sobie;Stefan Soldner-Rembold;F. Spano;Achim Stahl;D. Strom;R. Ströhmer;S. Tarem;M. Tasevsky;R. Teuscher;M. A. Thomson;E. Torrence;D. Toya;I. Trigger;Z. Trócsányi;E. Tsur;Miriam Watson;I. Ueda;B. Ujvári;C. F. Vollmer;P. Vannerem;R. Vértesi;M. Verzocchi;H. Voss;J. Vossebeld;C. P. Ward;D. R. Ward;Peter Watkins;A. T. Watson;Nigel Watson;P. S. Wells;Thorsten Wengler;N. Wermes;D. Wetterling;Graham Wilson;J. A. Wilson;G. Wolf;T. R. Wyatt;S. Yamashita;D. Zer-Zion;L. Zivkovic;
Journal the european physical journal c
Year 2009
DOI
10.1140/epjc/s10052-009-1175-z
URL
https://sciprofiles.com/publication/view/24f1355d673fea9b5496bee004aa7da6
Keywords
uncertainties mathrm baryon production antihyperon opal overline popcorn mechanism lambda

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