Bose-Einstein Correlations of π 0 Pairs from Hadronic Z 0 Decays The OPAL Collaboration

Giovanni Abbiendi,C. Ainsley, P. F. Åkesson,Gideon Alexander,John Allison,Pedro Amaral,Georgios Anagnostou,Kelby Anderson,Silvia Arcelli,Shoji Asai, David Axen, Georges Azuelos,Ian Richard Bailey, Elisabetta Luigia Barberio, R. J. Barlow,Richard Batley,Philip Bechtle, Ties Behnke, Ken W. Bell, P. J. Bell,Gideon Bella,Alain Bellerive,Gabriele Benelli,Siegfried Bethke,Otmar Biebel, Ian J Bloodworth, Oana Elena Vickey Boeriu, P. Bock, Daniele Bonacorsi, Madjid Boutemeur, Sylvie Braibant, Luca Brigliadori, Raymond M. Brown, Karsten Buesser, Helfried Burckhart, Simone Campana, Rebecca Carnegie, Bryan Caron, Antony Carter,Janet Carter, C. Y. Chang, D. G. Charlton, A. Csilling,Marco Cuffiani,Shlomo Dado, Albert De Roeck, Eddi A. De Wolf, Klaus Kurt Desch, Beatrix Dienes, M M Donkers, Jörg Dubbert, Ehud Duchovni,Guenter Duckeck, I. P. Duerdoth, Erik Elfgren, Erez Etzion, Federica Fabbri, Lutz Werner Feld,Pablo A. Ferrari, Franz Fiedler, Ivor Fleck, M. Ford, A. Frey, A. Fuertjes, Pauline Gagnon, John William Gary, Goetz Gaycken, Christoph Geich-Gimbel, G. A. Giacomelli, Paolo Giacomelli, Michele Giunta, Jason Goldberg,Eilam Gross, Jacob Grunhaus, Magali Gruwe, P. O. Guenther, Anik Gupta,Csaba Hajdu,M. Hamann, Gail G. Hanson, K. Harder, Amnon Harel, M. Harin-Dirac,Michael Hauschild,Christopher Hawkes, Richard John Hawkings, Richard J. Hemingway, Carsten Hensel, Gregor Herten, R. D. Heuer, J. C. Hill, Kara Dion Hoffman, Roger J. Homer,David P. Horvath, Peter Igo-Kemenes, Kazumasa Ishii, H. Jeremie, Predrag Jovanovi'c, T. R. Junk,Naoko Kanaya, Junichi Kanzaki, Gohar Karapetian,Douglas L. Karlen, Kiyotomo Kawagoe,Tatsuo Kawamoto, Richard Keeler, R. G. Kellogg, B. W. Kennedy,Dong H. Kim,Katja Klein, Amit Klier, Stefan Kluth,Takashi Kobayashi, Michael Kobel,Sachio Komamiya, Laura Lee Kormos, T. Kraemer, Thomas H. Kress, Peter Williamson Krieger, J. von Krogh, D. Krop, K. Kruger, Thorsten Kuhl, Michael Kupper, G. D. Lafferty, Hagar Yael Landsman, Dankfried Lanske, J. G. Layter, Axel Leins, Daniel Lellouch, Lorne Levinson, J. Lillich,Stephen Lloyd, F. K. Loebinger,Jianke Lu, Jean Ludwig, Amy Macpherson, Wolfgang Mader,Stefano Marcellini, Andre Martin, Gianni Masetti, Tetsuro Mashimo, W.John McDonald,Ja Mckenna, Thomas J. Mcmahon, Robert McPherson,Frans Meijers, Wolfgang Menges, Frank S. Merritt, H. Mes, Aldo Michelini, S. Mihara, Giora Mikenberg,Danny Miller, Shulamit Moed,Wolfgang Mohr,Takehiro Mori, A. F. Mutter,Koichi Nagai, Ichizo Nakamura, Homer Neal, Richard Nisius,S. W. O'neale,Alexander Oh, A N Okpara, M. J. Oreglia, S. Orito,Christoph Pahl,Gabriella Pásztor, Joleen R. Pater, G. N. Patrick, James Pilcher, James L. Pinfold,David Plane, Bonnie Poli, Jaroslaw Polok,Oliver Pooth, Mariusz Przybycien,Arnulf Quadt, Klaus Rabbertz, Ch. Rembser, Peter Renkel, Hartmut Rick, J. Michael Roney,Stefano Rosati,Yoram Rozen,Keith Runge, Kirsten Sachs, Takayuki Saeki, E. K. G. Sarkisyan, A. D. Schaile,O. Schaile, P. Scharff-Hansen,Jochen Schieck, Thomas Schoerner-Sadenius, Matthias Schröder, Markus E. Schumacher,Christoph Schwick,William Scott, Rolf Seuster, T. G. Shears, Bao Chun Shen, Peter Sherwood,Gian Piero Siroli,Andris Skuja, Adrian M Smith, Randall J. Sobie, S. Soeldner-Rembold,Francesco Spanò, Achim Stahl,K. Stephens, David M. Strom, Raimund Stroehmer,Shlomit Tarem, Marek Taševský, Richard James Taylor,Richard Teuscher,M. A. Thomson, Eric Torrence, Daisuke Toya,P. Dinh Tran,Alessandro Tricoli,Isabel Marian Trigger,Zoltan Laszlo Trocsanyi, E. Tsur, M. F. Turner-Watson, Ikuo Ueda, Balázs Ujvári, C. F. Vollmer, Philippe Vannerem, Robert Vertesi,Marco Verzocchi, Heinrich Voss, Joost Vossebeld,David A. Waller,Colleen Ward, D. R. Ward, P. M. Watkins,Alexander Watson, N. K. Watson, Peter S. Wells, Thorsten Wengler,Norbert Wermes, D. Wetterling, Grant W. Wilson, J. A. Wilson, Gy. Wolf,Terry Richard Wyatt, Satoru Yamashita, Daniel Zer-Zion, Lidija Živković

semanticscholar（2003）

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摘要

We observe Bose-Einstein correlations in π pairs produced inZ hadronic decays using the data sample collected by the OPAL detector at LEP 1 from 19 91 to 1995. Using a static Gaussian picture for the pion emitter source, we obta in the chaoticity parameter λ = 0.55 ± 0.10 ± 0.10 and the source radius R = (0.59 ± 0.08 ± 0.05) fm. According to the JETSET and HERWIG Monte Carlo models, the Bose-Einstein correlations in our data sample largely connect πs originating from the decays of different hadrons. Prompt pi ons formed at string break-ups or cluster decays only form a smal l fraction of the sample. (Submitted to Physics Letters B) The OPAL Collaboration G. Abbiendi , C. Ainsley, P.F.Åkesson, G. Alexander , J. Allison, P. Amaral , G. Anagnostou , K.J. Anderson, S. Arcelli, S. Asai , D. Axen, G. Azuelos, I. Bailey, E. Barberio, R.J. Barlow, R.J. Batley, P. Bechtle, T. Behnke, K.W. Bell, P.J. Bell , G. Bella, A. Bellerive, G. Benelli, S. Bethke, O. Biebel , I.J. Bloodworth, O. Boeriu, P. Bock, D. Bonacorsi , M. Boutemeur , S. Braibant , L. Brigliadori, R.M. Brown, K. Buesser , H.J. Burckhart , S. Campana , R.K. Carnegie, B. Caron, A.A. Carter, J.R. Carter , C.Y. Chang, D.G. Charlton, A. Csilling, M. Cuffiani, S. Dado, A. De Roeck, E.A. De Wolf, K. Desch, B. Dienes, M. Donkers, J. Dubbert , E. Duchovni , G. Duckeck, I.P. Duerdoth, E. Elfgren, E. Etzion, F. Fabbri , L. Feld, P. Ferrari , F. Fiedler , I. Fleck, M. Ford, A. Frey, A. Fürtjes, P. Gagnon , J.W. Gary, G. Gaycken, C. Geich-Gimbel , G. Giacomelli , P. Giacomelli , M. Giunta, J. Goldberg, E. Gross, J. Grunhaus , M. Gruwé, P.O. Günther , A. Gupta, C. Hajdu, M. Hamann, G.G. Hanson , K. Harder, A. Harel, M. Harin-Dirac, M. Hauschild, C.M. Hawkes, R. Hawkings, R.J. Hemingway , C. Hensel , G. Herten, R.D. Heuer , J.C. Hill, K. Hoffman, R.J. Homer , D. Horváth, P. Igo-Kemenes , K. Ishii, H. Jeremie, P. Jovanovic , T.R. Junk, N. Kanaya, J. Kanzaki , G. Karapetian , D. Karlen, K. Kawagoe, T. Kawamoto, R.K. Keeler, R.G. Kellogg, B.W. Kennedy, D.H. Kim, K. Klein, A. Klier, S. Kluth, T. Kobayashi , M. Kobel, S. Komamiya, L. Kormos, T. Krämer, T. Kress, P. Krieger , J. von Krogh, D. Krop, K. Kruger, T. Kuhl, M. Kupper, G.D. Lafferty, H. Landsman , D. Lanske, J.G. Layter , A. Leins, D. Lellouch, J. Letts, L. Levinson, J. Lillich, S.L. Lloyd, F.K. Loebinger , J. Lu, J. Ludwig, A. Macpherson , W. Mader, S. Marcellini, A.J. Martin, G. Masetti , T. Mashimo, P. Mättig, W.J. McDonald, J. McKenna, T.J. McMahon, R.A. McPherson , F. Meijers, W. Menges, F.S. Merritt, H. Mes, A. Michelini, S. Mihara, G. Mikenberg, D.J. Miller, S. Moed, W. Mohr, T. Mori, A. Mutter, K. Nagai, I. Nakamura, H.A. Neal, R. Nisius, S.W. O’Neale, A. Oh, A. Okpara, M.J. Oreglia, S. Orito, C. Pahl , G. Pásztor , J.R. Pater , G.N. Patrick, J.E. Pilcher , J. Pinfold, D.E. Plane, B. Poli, J. Polok, O. Pooth, M. Przybycień, A. Quadt, K. Rabbertz, C. Rembser , P. Renkel , H. Rick, J.M. Roney, S. Rosati , Y. Rozen, K. Runge, K. Sachs, T. Saeki , E.K.G. Sarkisyan , A.D. Schaile, O. Schaile, P. Scharff-Hansen , J. Schieck , T. Schörner-Sadenius , M. Schröder , M. Schumacher , C. Schwick, W.G. Scott , R. Seuster 14,f , T.G. Shears , B.C. Shen, P. Sherwood , G. Siroli, A. Skuja, A.M. Smith, R. Sobie, S. Söldner-Rembold , F. Spano, A. Stahl, K. Stephens , D. Strom, R. Ströhmer , S. Tarem, M. Tasevsky, R.J. Taylor , R. Teuscher , M.A. Thomson, E. Torrence, D. Toya, P. Tran, A. Tricoli, I. Trigger, Z. Trócsányi , E. Tsur, M.F. Turner-Watson , I. Ueda, B. Ujvári, C.F. Vollmer, P. Vannerem, R. Vértesi , M. Verzocchi , H. Voss, J. Vossebeld , D. Waller, C.P. Ward, D.R. Ward, P.M. Watkins, A.T. Watson, N.K. Watson, P.S. Wells, T. Wengler , N. Wermes, D. Wetterling G.W. Wilson, J.A. Wilson, G. Wolf, T.R. Wyatt, S. Yamashita , D. Zer-Zion, L. Zivkovic School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK Dipartimento di Fisica dell’ Università di Bologna and INF, I-40126 Bologna, Italy

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