Abstract
The production dynamics of baryon-antibaryon pairs are investigated using hadronic Z0 decays, recorded with the OPAL detector, which contain at least two identified Λ baryons. The rapidly difference for ΛΛ pairs shows the correlations expected from models with a chain-like production of baryon-antibaryon pairs. If the baryon number of a Λ is compensated by a Λ, the Λ is found with a probability of 53% in an interval of ±0.6 around the Λ rapidity. This correlation strength is weaker than predicted by the Herwig Monte Carlo and the Jetset Monte Carlo with a production chain of baryon-antibaryon, and stronger than predicted by the UCLA model. The observed rapidity correlations can be described by the Jetset Monte Carlo with a dominant production chain of baryon-meson-antibaryon, the popcorn mechanism. In addition to the short range correlations, one finds an indication of a correlation of ΛΛ pairs in opposite hemispheres if both the Λ and the Λ have large rapidities. Such long range correlations are expected if the primary quark flavours are compensated in opposite hemispheres and if these quarks are found in energetic baryons. Rates for simultaneous baryon and strangeness number compensation for ΛΛ, Ξ-Ξ+ and Ξ-Λ (Λ+ Λ) are measured and compared with different Monte Carlo models.
| Original language | English |
|---|---|
| Pages (from-to) | 415-427 |
| Number of pages | 13 |
| Journal | Physics Letters B |
| Volume | 305 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1993 May 20 |
| Externally published | Yes |
ASJC Scopus subject areas
- Nuclear and High Energy Physics
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In: Physics Letters B, Vol. 305, No. 4, 20.05.1993, p. 415-427.
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Evidence for chain-like production of strange baryon pairs in jets
AU - Acton, P. D.
AU - Alexander, G.
AU - Allison, J.
AU - Allport, P. P.
AU - Anderson, K. J.
AU - Arcelli, S.
AU - Astbury, A.
AU - Axen, D.
AU - Azuelos, G.
AU - Bahan, G. A.
AU - Baines, J. T.M.
AU - Ball, A. H.
AU - Banks, J.
AU - Barlow, R. J.
AU - Barnett, S.
AU - Batley, J. R.
AU - Beaudoin, G.
AU - Beck, A.
AU - Beck, G. A.
AU - Becker, J.
AU - Behnke, T.
AU - Bell, K. W.
AU - Bella, G.
AU - Bentkowski, P.
AU - Berlich, P.
AU - Bethke, S.
AU - Biebel, O.
AU - Binder, U.
AU - Bloodworth, I. J.
AU - Bock, P.
AU - Boden, B.
AU - Bosch, H. M.
AU - Breuker, H.
AU - Bright-Thomas, P.
AU - Brown, R. M.
AU - Buijs, A.
AU - Burckhart, H. J.
AU - Burgard, C.
AU - Capiluppi, P.
AU - Carnegie, R. K.
AU - Carter, A. A.
AU - Carter, J. R.
AU - Chang, C. Y.
AU - Charlton, D. G.
AU - Chu, S. L.
AU - Clarke, P. E.L.
AU - Cohen, I.
AU - Clayton, J. C.
AU - Collins, W. J.
AU - Conboy, J. E.
AU - Cooper, M.
AU - Coupland, M.
AU - Cuffiani, M.
AU - Dado, S.
AU - Dallavalle, G. M.
AU - De Jong, S.
AU - del Pozo, L. A.
AU - Deng, H.
AU - Dieckmann, A.
AU - Dittmar, M.
AU - Dixit, M. S.
AU - do Couto e Silva, E.
AU - Duboscq, J. E.
AU - Duchovni, E.
AU - Duckeck, G.
AU - Duerdoth, I. P.
AU - Dumas, D. J.P.
AU - Elcombe, P. A.
AU - Estabrooks, P. G.
AU - Etzion, E.
AU - Evans, H. G.
AU - Fabbri, F.
AU - Fierro, M.
AU - Fincke-Keeler, M.
AU - Fischer, H. M.
AU - Fong, D. G.
AU - Foucher, M.
AU - Gaidot, A.
AU - Ganel, O.
AU - Gary, J. W.
AU - Gascon, J.
AU - McGowan, R. F.
AU - Geddes, N. I.
AU - Geich-Gimbel, C.
AU - Gensler, S. W.
AU - Gentit, F. X.
AU - Giacomelli, G.
AU - Giacomelli, R.
AU - Gibson, V.
AU - Gibson, W. R.
AU - Gillies, J. D.
AU - Goldberg, J.
AU - Goodrick, M. J.
AU - Gorn, W.
AU - Grandi, C.
AU - Grant, F. C.
AU - Hagemann, J.
AU - Hanson, G. G.
AU - Hansroul, M.
AU - Hargrove, C. K.
AU - Harrison, P. F.
AU - Hart, J.
AU - Hattersley, P. M.
AU - Hauschild, M.
AU - Hawkes, C. M.
AU - Heflin, E.
AU - Hemingway, R. J.
AU - Heuer, R. D.
AU - Hill, J. C.
AU - Hillier, S. J.
AU - Hilse, T.
AU - Hinshaw, D. A.
AU - Hobbs, J. D.
AU - Hobson, P. R.
AU - Hochman, D.
AU - Homer, R. J.
AU - Honma, A. K.
AU - Hughes-Jones, R. E.
AU - Humbert, R.
AU - Igo-Kemenes, P.
AU - Ihssen, H.
AU - Imrie, D. C.
AU - Janissen, A. C.
AU - Jawahery, A.
AU - Jeffreys, P. W.
AU - Jeremie, H.
AU - Jimack, M.
AU - Jobes, M.
AU - Jones, R. W.L.
AU - Jovanovic, P.
AU - Jui, C.
AU - Karlen, D.
AU - Kawagoe, K.
AU - Kawamoto, T.
AU - Keeler, R. K.
AU - Kellogg, R. G.
AU - Kennedy, B. W.
AU - Kluth, S.
AU - Kobayashi, T.
AU - Koetke, D. S.
AU - Kokott, T. P.
AU - Komamiya, S.
AU - Köpke, L.
AU - Kral, J. F.
AU - Kowalewski, R.
AU - von Krogh, J.
AU - Kroll, J.
AU - Kuwano, M.
AU - Kyberd, P.
AU - Lafferty, G. D.
AU - Lahmann, R.
AU - Lamarche, F.
AU - Layter, J. G.
AU - Leblanc, P.
AU - Lee, A. M.
AU - Lehto, M. H.
AU - Lellouch, D.
AU - Leroy, C.
AU - Letts, J.
AU - Levegrün, S.
AU - Levinson, L.
AU - Lloyd, S. L.
AU - Loebinger, F. K.
AU - Lorah, J. M.
AU - Lorazo, B.
AU - Losty, M. J.
AU - Lou, X. C.
AU - Ludwig, J.
AU - Mannelli, M.
AU - Marcellini, S.
AU - Maringer, G.
AU - Markus, C.
AU - Martin, A. J.
AU - Martin, J. P.
AU - Mashimo, T.
AU - Mättig, P.
AU - Maur, U.
AU - McKenna, J.
AU - McMahon, T. J.
AU - McNutt, J. R.
AU - Meijers, F.
AU - Menszner, D.
AU - Merritt, F. S.
AU - Mes, H.
AU - Michelini, A.
AU - Middleton, R. P.
AU - Mikenberg, G.
AU - Mildenberger, J.
AU - Miller, D. J.
AU - Mir, R.
AU - Mohr, W.
AU - Moisan, C.
AU - Montanari, A.
AU - Mori, T.
AU - Morii, M.
AU - Mouthuy, T.
AU - Nellen, B.
AU - Nguyen, H. H.
AU - Nozaki, M.
AU - O'Neale, S. W.
AU - Oakham, F. G.
AU - Odorici, F.
AU - Ogren, H. O.
AU - Oram, C. J.
AU - Oreglia, M. J.
AU - Orito, S.
AU - Pansart, J. P.
AU - Panzer-Steindel, B.
AU - Paschievici, P.
AU - Patrick, G. N.
AU - Paz-Jaoshvili, N.
AU - Pfister, P.
AU - Pilcher, J. E.
AU - Pinfold, J.
AU - Pitman, D.
AU - Plane, D. E.
AU - Poffenberger, P.
AU - Poli, B.
AU - Pouladdej, A.
AU - Pritchard, T. W.
AU - Przysiezniak, H.
AU - Quast, G.
AU - Redmond, M. W.
AU - Rees, D. L.
AU - Richards, G. E.
AU - Robinson, D.
AU - Rollnik, A.
AU - Roney, J. M.
AU - Ros, E.
AU - Rossberg, S.
AU - Rossi, A. M.
AU - Rosvick, M.
AU - Routenburg, P.
AU - Runge, K.
AU - Runolfsson, O.
AU - Rust, D. R.
AU - Sasaki, M.
AU - Sbarra, C.
AU - Schaile, A. D.
AU - Schaile, O.
AU - Schappert, W.
AU - Scharff-Hansen, P.
AU - Schenk, P.
AU - Schmitt, B.
AU - von der Schmitt, H.
AU - Schreiber, S.
AU - Schwick, C.
AU - Schwiening, J.
AU - Scott, W. G.
AU - Settles, M.
AU - Shears, T. G.
AU - Shen, B. C.
AU - Shepherd-Themistocleous, C. H.
AU - Sherwood, P.
AU - Shypit, R.
AU - Simon, A.
AU - Singh, P.
AU - Siroli, G. P.
AU - Skuja, A.
AU - Smith, A. M.
AU - Smith, T. J.
AU - Snow, G. A.
AU - Sobie, R.
AU - Springer, R. W.
AU - Sproston, M.
AU - Stephens, K.
AU - Steuerer, J.
AU - Ströhmer, R.
AU - Strom, D.
AU - Takeshita, T.
AU - Taras, P.
AU - Tarem, S.
AU - Tecchio, M.
AU - Teixeira-Dias, P.
AU - Tesch, N.
AU - Thackray, N. J.
AU - Thomson, M. A.
AU - Torrente-Lujan, E.
AU - Transtromer, G.
AU - Tresilian, N. J.
AU - Tsukamoto, T.
AU - Turner, M. F.
AU - Tysarczyk-Niemeyer, G.
AU - Van den plas, D.
AU - Van Kooten, R.
AU - VanDalen, G. J.
AU - Vasseur, G.
AU - Virtue, C. J.
AU - Wagner, A.
AU - Wagner, D. L.
AU - Wahl, C.
AU - Walker, J. P.
AU - Ward, C. P.
AU - Ward, D. R.
AU - Watkins, P. M.
AU - Watson, A. T.
AU - Watson, N. K.
AU - Weber, M.
AU - Weber, P.
AU - Wells, P. S.
AU - Wermes, N.
AU - Whalley, M. A.
AU - Wilson, G. W.
AU - Wilson, J. A.
AU - Winterer, V. H.
AU - Wlodek, T.
AU - Wotton, S.
AU - Wyatt, T. R.
AU - Yaari, R.
AU - Yeaman, A.
AU - Yekutieli, G.
AU - Yurko, M.
AU - Zeuner, W.
AU - Zorn, G. T.
N1 - Funding Information: institutionws e are pleasedto acknowledgteh e Departmenotf Energy,U SA, NationalS cienceF oundationU, SA, Texas National ResearchL aboratoryC ommission, USA, Sciencea nd EngineerinRg esearchC ouncil,UK, Natural Sciencesa nd EngineerinRg esearchC ouncil, Canada, FussefeldF oundation, IsraeliM inistryof Energy, IsraeliM inistryof Science, Minerva Gesellschaft, JapaneseM inistryof EducationS, ciencea ndCulture (the Monbusho) and a grant under the Monbusho InternationaSlc ienceR esearchP rogram, German Israeli Bi-national Science Foundation (GIF), Direction des Sciencesd e la Mati~re du Commissariat/lr EnergieA tomiqueF, rance, Bundesministeriutm'fi rF orschungu nd Technologie, FRG, NationalR esearchC ouncilof Canada,C anada, A.P. Sloan Foundation and Junta Nacional de InvestigaqaCoi ent{ficae Tecnol6gicaP,o rtugal.
PY - 1993/5/20
Y1 - 1993/5/20
N2 - The production dynamics of baryon-antibaryon pairs are investigated using hadronic Z0 decays, recorded with the OPAL detector, which contain at least two identified Λ baryons. The rapidly difference for ΛΛ pairs shows the correlations expected from models with a chain-like production of baryon-antibaryon pairs. If the baryon number of a Λ is compensated by a Λ, the Λ is found with a probability of 53% in an interval of ±0.6 around the Λ rapidity. This correlation strength is weaker than predicted by the Herwig Monte Carlo and the Jetset Monte Carlo with a production chain of baryon-antibaryon, and stronger than predicted by the UCLA model. The observed rapidity correlations can be described by the Jetset Monte Carlo with a dominant production chain of baryon-meson-antibaryon, the popcorn mechanism. In addition to the short range correlations, one finds an indication of a correlation of ΛΛ pairs in opposite hemispheres if both the Λ and the Λ have large rapidities. Such long range correlations are expected if the primary quark flavours are compensated in opposite hemispheres and if these quarks are found in energetic baryons. Rates for simultaneous baryon and strangeness number compensation for ΛΛ, Ξ-Ξ+ and Ξ-Λ (Λ+ Λ) are measured and compared with different Monte Carlo models.
AB - The production dynamics of baryon-antibaryon pairs are investigated using hadronic Z0 decays, recorded with the OPAL detector, which contain at least two identified Λ baryons. The rapidly difference for ΛΛ pairs shows the correlations expected from models with a chain-like production of baryon-antibaryon pairs. If the baryon number of a Λ is compensated by a Λ, the Λ is found with a probability of 53% in an interval of ±0.6 around the Λ rapidity. This correlation strength is weaker than predicted by the Herwig Monte Carlo and the Jetset Monte Carlo with a production chain of baryon-antibaryon, and stronger than predicted by the UCLA model. The observed rapidity correlations can be described by the Jetset Monte Carlo with a dominant production chain of baryon-meson-antibaryon, the popcorn mechanism. In addition to the short range correlations, one finds an indication of a correlation of ΛΛ pairs in opposite hemispheres if both the Λ and the Λ have large rapidities. Such long range correlations are expected if the primary quark flavours are compensated in opposite hemispheres and if these quarks are found in energetic baryons. Rates for simultaneous baryon and strangeness number compensation for ΛΛ, Ξ-Ξ+ and Ξ-Λ (Λ+ Λ) are measured and compared with different Monte Carlo models.
UR - http://www.scopus.com/inward/record.url?scp=0000836231&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000836231&partnerID=8YFLogxK
U2 - 10.1016/0370-2693(93)91076-Y
DO - 10.1016/0370-2693(93)91076-Y
M3 - Article
AN - SCOPUS:0000836231
SN - 0370-2693
VL - 305
SP - 415
EP - 427
JO - Physics Letters B
JF - Physics Letters B
IS - 4
ER -