Σ−-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism - The European Physical Journal C

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ID: 268700
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 Abbiendi, G.;Ainsley, C.;Åkesson, P. F.;Alexander, G.;Anagnostou, G.;Anderson, K. J.;Asai, S.;Axen, D.;Bailey, I.;Barberio, E.;Barillari, T.;Barlow, R. J.;Batley, R. J.;Bechtle, P.;Behnke, T.;Bell, K. W.;Bell, P. J.;Bella, G.;Bellerive, A.;Benelli, G.;Bethke, S.;Biebel, O.;Boeriu, O.;Bock, P.;Boutemeur, M.;Braibant, S.;Brown, R. M.;Burckhart, H. J.;Campana, S.;Capiluppi, P.;Carnegie, R. K.;Carter, A. A.;Carter, J. R.;Chang, C. Y.;Charlton, D. G.;Ciocca, C.;Csilling, A.;Cuffiani, M.;Dado, S.;Dallavalle, M.;De Roeck, A.;De Wolf, E. A.;Desch, K.;Dienes, B.;Dubbert, J.;Duchovni, E.;Duckeck, G.;Duerdoth, I. P.;Etzion, E.;Fabbri, F.;Ferrari, P.;Fiedler, F.;Fleck, I.;Ford, M.;Frey, A.;Gagnon, P.;Gary, J. W.;Geich-Gimbel, C.;Giacomelli, G.;Giacomelli, P.;Giunta, M.;Goldberg, J.;Gross, E.;Grunhaus, J.;Gruwé, M.;Gupta, A.;Hajdu, C.;Hamann, M.;Hanson, G. G.;Harel, A.;Hauschild, M.;Hawkes, C. M.;Hawkings, R.;Herten, G.;Heuer, R. D.;Hill, J. C.;Horváth, D.;Igo-Kemenes, P.;Ishii, K.;Jeremie, H.;Jovanovic, P.;Junk, T. R.;Kanzaki, J.;Karlen, D.;Kawagoe, K.;Kawamoto, T.;Keeler, R. K.;Kellogg, R. G.;Kennedy, B. W.;Kluth, S.;Kobayashi, T.;Kobel, M.;Komamiya, S.;Krämer, T.;Krasznahorkay, A.;Krieger, P.;von Krogh, J.;Kuhl, T.;Kupper, M.;Lafferty, G. D.;Landsman, H.;Lanske, D.;Lellouch, D.;Letts, J.;Levinson, L.;Lillich, J.;Lloyd, S. L.;Loebinger, F. K.;Lu, J.;Ludwig, A.;Ludwig, J.;Mader, W.;Marcellini, S.;Martin, A. J.;Mashimo, T.;Mättig, P.;McKenna, J.;McPherson, R. A.;Meijers, F.;Menges, W.;Merritt, F. S.;Mes, H.;Meyer, N.;Michelini, A.;Mihara, S.;Mikenberg, G.;Miller, D. J.;Mohr, W.;Mori, T.;Mutter, A.;Nagai, K.;Nakamura, I.;Nanjo, H.;Neal, H. A.;O’Neale, S. W.;Oh, A.;Oreglia, M. J.;Orito, S.;Pahl, C.;Pásztor, G.;Pater, J. R.;Pilcher, J. E.;Pinfold, J.;Plane, D. E.;Pooth, O.;Przybycień, M.;Quadt, A.;Rabbertz, K.;Rembser, C.;Renkel, P.;Roney, J. M.;Rossi, A. M.;Rozen, Y.;Runge, K.;Sachs, K.;Saeki, T.;Sarkisyan, E. K. G.;Schaile, A. D.;Schaile, O.;Scharff-Hansen, P.;Schieck, J.;Schörner-Sadenius, T.;Schröder, M.;Schumacher, M.;Seuster, R.;Shears, T. G.;Shen, B. C.;Sherwood, P.;Skuja, A.;Smith, A. M.;Sobie, R.;Söldner-Rembold, S.;Spano, F.;Stahl, A.;Strom, D.;Ströhmer, R.;Tarem, S.;Tasevsky, M.;Teuscher, R.;Thomson, M. A.;Torrence, E.;Toya, D.;Trigger, I.;Trócsányi, Z.;Tsur, E.;Turner-Watson, M. F.;Ueda, I.;Ujvári, B.;Vollmer, C. F.;Vannerem, P.;Vértesi, R.;Verzocchi, M.;Voss, H.;Vossebeld, J.;Ward, C. P.;Ward, D. R.;Watkins, P. M.;Watson, A. T.;Watson, N. K.;Wells, P. S.;Wengler, T.;Wermes, N.;Wetterling, D.;Wilson, G. W.;Wilson, J. A.;Wolf, G.;Wyatt, T. R.;Yamashita, S.;Zer-Zion, D.;Zivkovic, L.;Abbiendi, G.;Ainsley, C.;Åkesson, P. F.;Alexander, G.;Anagnostou, G.;Anderson, K. J.;Asai, S.;Axen, D.;Bailey, I.;Barberio, E.;Barillari, T.;Barlow, R. J.;Batley, R. J.;Bechtle, P.;Behnke, T.;Bell, K. W.;Bell, P. J.;Bella, G.;Bellerive, A.;Benelli, G.;Bethke, S.;Biebel, O.;Boeriu, O.;Bock, P.;Boutemeur, M.;Braibant, S.;Brown, R. M.;Burckhart, H. J.;Campana, S.;Capiluppi, P.;Carnegie, R. K.;Carter, A. A.;Carter, J. R.;Chang, C. Y.;Charlton, D. G.;Ciocca, C.;Csilling, A.;Cuffiani, M.;Dado, S.;Dallavalle, M.;De Roeck, A.;De Wolf, E. A.;Desch, K.;Dienes, B.;Dubbert, J.;Duchovni, E.;Duckeck, G.;Duerdoth, I. P.;Etzion, E.;Fabbri, F.;Ferrari, P.;Fiedler, F.;Fleck, I.;Ford, M.;Frey, A.;Gagnon, P.;Gary, J. W.;Geich-Gimbel, C.;Giacomelli, G.;Giacomelli, P.;Giunta, M.;Goldberg, J.;Gross, E.;Grunhaus, J.;Gruwé, M.;Gupta, A.;Hajdu, C.;Hamann, M.;Hanson, G. G.;Harel, A.;Hauschild, M.;Hawkes, C. M.;Hawkings, R.;Herten, G.;Heuer, R. D.;Hill, J. C.;Horváth, D.;Igo-Kemenes, P.;Ishii, K.;Jeremie, H.;Jovanovic, P.;Junk, T. R.;Kanzaki, J.;Karlen, D.;Kawagoe, K.;Kawamoto, T.;Keeler, R. K.;Kellogg, R. G.;Kennedy, B. W.;Kluth, S.;Kobayashi, T.;Kobel, M.;Komamiya, S.;Krämer, T.;Krasznahorkay, A.;Krieger, P.;von Krogh, J.;Kuhl, T.;Kupper, M.;Lafferty, G. D.;Landsman, H.;Lanske, D.;Lellouch, D.;Letts, J.;Levinson, L.;Lillich, J.;Lloyd, S. L.;Loebinger, F. K.;Lu, J.;Ludwig, A.;Ludwig, J.;Mader, W.;Marcellini, S.;Martin, A. J.;Mashimo, T.;Mättig, P.;McKenna, J.;McPherson, R. A.;Meijers, F.;Menges, W.;Merritt, F. S.;Mes, H.;Meyer, N.;Michelini, A.;Mihara, S.;Mikenberg, G.;Miller, D. J.;Mohr, W.;Mori, T.;Mutter, A.;Nagai, K.;Nakamura, I.;Nanjo, H.;Neal, H. A.;O’Neale, S. W.;Oh, A.;Oreglia, M. J.;Orito, S.;Pahl, C.;Pásztor, G.;Pater, J. R.;Pilcher, J. E.;Pinfold, J.;Plane, D. E.;Pooth, O.;Przybycień, M.;Quadt, A.;Rabbertz, K.;Rembser, C.;Renkel, P.;Roney, J. M.;Rossi, A. M.;Rozen, Y.;Runge, K.;Sachs, K.;Saeki, T.;Sarkisyan, E. K. G.;Schaile, A. D.;Schaile, O.;Scharff-Hansen, P.;Schieck, J.;Schörner-Sadenius, T.;Schröder, M.;Schumacher, M.;Seuster, R.;Shears, T. G.;Shen, B. C.;Sherwood, P.;Skuja, A.;Smith, A. M.;Sobie, R.;Söldner-Rembold, S.;Spano, F.;Stahl, A.;Strom, D.;Ströhmer, R.;Tarem, S.;Tasevsky, M.;Teuscher, R.;Thomson, M. A.;Torrence, E.;Toya, D.;Trigger, I.;Trócsányi, Z.;Tsur, E.;Turner-Watson, M. F.;Ueda, I.;Ujvári, B.;Vollmer, C. F.;Vannerem, P.;Vértesi, R.;Verzocchi, M.;Voss, H.;Vossebeld, J.;Ward, C. P.;Ward, D. R.;Watkins, P. M.;Watson, A. T.;Watson, N. K.;Wells, P. S.;Wengler, T.;Wermes, N.;Wetterling, D.;Wilson, G. W.;Wilson, J. A.;Wolf, G.;Wyatt, T. R.;Yamashita, S.;Zer-Zion, D.;Zivkovic, L.;
Journal the european physical journal c
Year 2009
DOI
doi:10.1140/epjc/s10052-009-1175-z
URL
https://doi.org/10.1140/epjc/s10052-009-1175-z
Keywords
astronomy measurement science and instrumentation string theory quantum field theory elementary particles nuclear physics heavy ions hadrons quantum field theories astrophysics and cosmology nuclear energy

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