Σ + , Σ 0 and Σ − hyperon production in hadronic Z 0 decays
G. Alexander,J. Allison,N. Altekamp,K. Ametewee,K. J. Anderson,S. Anderson,S. Arcelli,S. Asai,D. Axen,G. Azuelos,A. H. Ball,E. Barberio,R. J. Barlow,R. Bartoldus,J. R. Batley,J. Bechtluft,C. Beeston,T. Behnke,A. N. Bell,K. W. Bell,G. Bella,S. Bentvelsen,P. Berlich,S. Bethke,O. Biebel,V. Blobel,I. J. Bloodworth,J. E. Bloomer,M. Bobinski,P. Bock,H. M. Bosch,M. Boutemeur,B. T. Bouwens,S. Braibant,R. M. Brown,H. J. Burckhart,C. Burgard,R. Bürgin,P. Capiluppi,R. K. Carnegie,A. A. Carter,J. R. Carter,C. Y. Chang,C. Charlesworth,D. G. Charlton,D. Chrisman,S. L. Chu,P. E. L. Clarke,I. Cohen,J. E. Conboy,O. C. Cooke,M. Cuffiani,S. Dado,C. Dallapiccola,G. M. Dallavalle,S. De Jong,L. A. del Pozo,K. Desch,M. S. Dixit,E. Couto e do Silva,M. Doucet,E. Duchovni,G. Duckeck,I. P. Duerdoth,J. E. G. Edwards,P. G. Estabrooks,H. G. Evans,M. Evans,F. Fabbri,P. Fath,F. Fiedler,M. Fierro,H. M. Fischer,R. Folman,D. G. Fong,M. Foucher,A. Furtjes,P. Gagnon,A. Gaidot,J. W. Gary,J. Gascon,S. M. Gascon-Shotkin,N. I. Geddes,C. Geich-Gimbel,F. X. Gentit,T. Geralis,G. Giacomelli,P. Giacomelli,R. Giacomelli,V. Gibson,W. R. Gibson,D. M. Gingrich,D. Glenzinski,J. Goldberg,M. J. Goodrick,W. Gorn,C. Grandi,E. Gross,M. Gruwé,C. Hajdu,G. G. Hanson,M. Hansroul,M. Hapke,C. K. Hargrove,P. A. Hart,C. Hartmann,M. Hauschild,C. M. Hawkes,R. Hawkings,R. J. Hemingway,G. Herten,R. D. Heuer,M. D. Hildreth,J. C. Hill,S. J. Hillier,T. Hilse,P. R. Hobson,R. J. Homer,A. K. Honma,D. Horváth,R. Howard,R. E. Hughes-Jones,D. E. Hutchcroft,P. Igo-Kemenes,D. C. Imrie,M. R. Ingram,K. Ishii,A. Jawahery,P. W. Jeffreys,H. Jeremie,M. Jimack,A. Joly,C. R. Jones,G. Jones,M. Jones,R. W. L. Jones,U. Jost,P. Jovanovic,T. R. Junk,D. Karlen,K. Kawagoe,T. Kawamoto,R. K. Keeler,R. G. Kellogg,B. W. Kennedy,B. J. King,J. Kirk,S. Kluth,T. Kobayashi,M. Kobel,D. S. Koetke,T. P. Kokott,S. Komamiya,R. Kowalewski,T. Kress,P. Krieger,J. von Krogh,P. Kyberd,G. D. Lafferty,H. Lafoux,R. Lahmann,W. P. Lai,D. Lanske,J. Lauber,S. R. Lautenschlager,J. G. Layter,D. Lazic,A. M. Lee,E. Lefebvre,D. Lellouch,J. Letts,L. Levinson,C. Lewis,S. L. Lloyd,F. K. Loebinger,G. D. Long,M. J. Losty,J. Ludwig,A. Luig,A. Malik,M. Mannelli,S. Marcellini,C. Markus,A. J. Martin,J. P. Martin,G. Martinez,T. Mashimo,W. Matthews,P. Mattig,W. J. McDonald,J. McKenna,E. A. Mckigney,T. J. McMahon,A. I. McNab,R. A. McPherson,F. Meijers,S. Menke,F. S. Merritt,H. Mes,J. Meyer,A. Michelini,G. Mikenberg,D. J. Miller,R. Mir,W. Mohr,A. Montanari,T. Mori,M. Morii,U. Müller,K. Nagai,I. Nakamura,H. A. Neal,B. Nellen,B. Nijjhar,R. Nisius,S. W. O’Neale,F. G. Oakham,F. Odorici,H. O. Ogren,T. Omori,M. J. Oreglia,S. Orito,J. Palinkás,G. Pásztor,J. R. Pater,G. N. Patrick,J. Patt,M. J. Pearce,S. Petzold,P. Pfeifenschneider,J. E. Pilcher,J. Pinfold,D. E. Plane,P. Poffenberger,B. Poli,A. Posthaus,H. Przysiezniak,D. L. Rees,D. Rigby,S. A. Robins,N. Rodning,J. M. Roney,A. Rooke,E. Ros,A. M. Rossi,M. Rosvick,P. Routenburg,Y. Rozen,K. Runge,O. Runolfsson,U. Ruppel,D. R. Rust,R. Rylko,K. Sachs,E. K. G. Sarkisyan,M. Sasaki,C. Sbarra,A. D. Schaile,O. Schaile,F. Scharf,P. Scharff-Hansen,P. Schenk,B. Schmitt,S. Schmitt,M. Schröder,H. C. Schultz-Coulon,M. Schulz,M. Schumacher,P. Schütz,W. G. Scott,T. G. Shears,B. C. Shen,C. H. Shepherd-Themistocleous,P. Sherwood,G. P. Siroli,A. Sittler,A. Skillman,A. Skuja,A. M. Smith,T. J. Smith,G. A. Snow,R. Sobie,S. Söldner-Rembold,R. W. Springer,M. Sproston,A. Stahl,M. Starks,M. Steiert,K. Stephens,J. Steuerer,B. Stockhausen,D. Strom,F. Strumia,P. Szymanski,R. Tafirout,S. D. Talbot,S. Tanaka,P. Taras,S. Tarem,M. Tecchio,M. Thiergen,M. A. Thomson,E. von Törne,S. Towers,T. Tsukamoto,E. Tsur,A. S. Turcot,M. F. Turner-Watson,P. Utzat,R. Van Kooten,G. Vasseur,M. Verzocchi,P. Vikas,M. Vincter,E. H. Vokurka,F. Wäckerle,A. Wagner,C. P. Ward,D. R. Ward,J. J. Ward,P. M. Watkins,A. T. Watson,N. K. Watson,P. Weber,P. S. Wells,N. Wermes,J. S. White,B. Wilkens,G. W. Wilson,J. A. Wilson,G. Wolf,S. Wotton,T. R. Wyatt,S. Yamashita,G. Yekutieli,V. Zacek
Zeitschrift für Physik C Particles and Fields（2014）
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摘要
The production rates of the $J_{P}={1⩈er 2}^{+}$ octet Σ baryons in hadronic Z 0 decays have been measured using the OPAL detector at LEP. The inclusive production rates per hadronic Z 0 decay of the three isospin states (including the respective antiparticle) have been separately measured for the first time: $άtrix {n_{Sigma^{+}}=0.099pm 0.008pm 0.013ŗ n_{Sigma^{0}}=0.071pm 0.012pm 0.013ŗ n_{Sigma^{-}}=0.083pm 0.006pm 0.009ŗ}$ where the first error is statistical and the second is systematic. Differential cross-sections are also presented for the Σ + and Σ − and compared with JETSET and HERWIG predictions. Assuming full isospin symmetry, the average inclusive rate is: ${1⩈er 3}[n_{Sigma^{+}+Sigma^{0}+Sigma^{-}}]=0.084pm 0.005 ({⤪ stat.}) pm 0.008 ({⤪ syst.})$.
