--Antihyperon correlations in Z0 decay and investigation of the baryon production mechanism

G. Abbiendi, C. Ainsley, P. F. Åkesson, G. Alexander, G. Anagnostou, K. J. Anderson, S. Asai, D. Axen, I. Bailey, E. Barberio, T. Barillari, R. J. Barlow, R. J. Batley, P. Bechtle, T. Behnke, K. W. Bell, P. J. Bell, G. Bella, A. Bellerive, G. Benelli & 190 others 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, D. G. 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, G. Giacomelli, P. Giacomelli, M. Giunta, J. Goldberg, E. Gross, J. Grunhaus, M. Gruwé, A. Gupta, C. Hajdu, M. Hamann, G. G. Hanson, A. Harel, M. Hauschild, C. M. Hawkes, R. Hawkings, G. Herten, R. D. Heuer, J. C. Hill, D. Horváth, P. Igo-Kemenes, K. Ishii, H. Jeremie, P. Jovanovic, T. R. Junk, J. Kanzaki, D. Karlen, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, S. Kluth, T. Kobayashi, M. Kobel, Sachio Komamiya, T. Krämer, A. Krasznahorkay, P. Krieger, J. Von Krogh, T. Kuhl, M. Kupper, G. D. Lafferty, H. Landsman, D. Lanske, D. Lellouch, J. Letts, L. Levinson, J. Lillich, S. L. Lloyd, F. K. Loebinger, J. Lu, A. Ludwig, J. Ludwig, W. Mader, S. Marcellini, A. J. Martin, T. Mashimo, P. Mättig, J. McKenna, R. A. McPherson, F. Meijers, W. Menges, F. S. Merritt, H. Mes, N. Meyer, A. Michelini, S. 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, G. Pásztor, J. R. Pater, J. E. Pilcher, J. Pinfold, D. E. Plane, O. Pooth, M. Przybycień, A. Quadt, K. Rabbertz, C. Rembser, P. Renkel, J. M. Roney, A. M. Rossi, 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, R. Seuster, T. G. Shears, B. C. Shen, P. Sherwood, A. Skuja, A. M. Smith, R. Sobie, S. Söldner-Rembold, F. Spano, A. Stahl, D. Strom, R. Ströhmer, S. Tarem, M. Tasevsky, R. Teuscher, M. A. Thomson, E. Torrence, D. Toya, 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, 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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Data collected around √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 ∑- hyperons whose baryon number is compensated by the production of a ∑̄- Λ̄ Ξ ̄- 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 Λ Λ ̄ and p πp̄ correlations are not conclusive, if parameter uncertainties are considered.

Original languageEnglish
Pages (from-to)609-625
Number of pages17
JournalEuropean Physical Journal C
Volume64
Issue number4
DOIs
Publication statusPublished - 2009 Dec 1
Externally publishedYes

Fingerprint

baryons
decay
Colliding beam accelerators
hyperons
quantum numbers
standard deviation
strings
signatures
Experiments
Uncertainty

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

Abbiendi, G., Ainsley, C., Åkesson, P. F., Alexander, G., Anagnostou, G., Anderson, K. J., ... Zivkovic, L. (2009). --Antihyperon correlations in Z0 decay and investigation of the baryon production mechanism. European Physical Journal C, 64(4), 609-625. https://doi.org/10.1140/epjc/s10052-009-1175-z

--Antihyperon correlations in Z0 decay and investigation of the baryon production mechanism. / 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, Sachio; 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.

In: European Physical Journal C, Vol. 64, No. 4, 01.12.2009, p. 609-625.

Research output: Contribution to journalArticle

Abbiendi, G, Ainsley, C, Åkesson, PF, Alexander, G, Anagnostou, G, Anderson, KJ, Asai, S, Axen, D, Bailey, I, Barberio, E, Barillari, T, Barlow, RJ, Batley, RJ, Bechtle, P, Behnke, T, Bell, KW, Bell, PJ, Bella, G, Bellerive, A, Benelli, G, Bethke, S, Biebel, O, Boeriu, O, Bock, P, Boutemeur, M, Braibant, S, Brown, RM, Burckhart, HJ, Campana, S, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Ciocca, C, Csilling, A, Cuffiani, M, Dado, S, Dallavalle, M, De Roeck, A, De Wolf, EA, Desch, K, Dienes, B, Dubbert, J, Duchovni, E, Duckeck, G, Duerdoth, IP, Etzion, E, Fabbri, F, Ferrari, P, Fiedler, F, Fleck, I, Ford, M, Frey, A, Gagnon, P, Gary, JW, Geich-Gimbel, C, Giacomelli, G, Giacomelli, P, Giunta, M, Goldberg, J, Gross, E, Grunhaus, J, Gruwé, M, Gupta, A, Hajdu, C, Hamann, M, Hanson, GG, Harel, A, Hauschild, M, Hawkes, CM, Hawkings, R, Herten, G, Heuer, RD, Hill, JC, Horváth, D, Igo-Kemenes, P, Ishii, K, Jeremie, H, Jovanovic, P, Junk, TR, Kanzaki, J, Karlen, D, Kawagoe, K, Kawamoto, T, Keeler, RK, Kellogg, RG, Kennedy, BW, Kluth, S, Kobayashi, T, Kobel, M, Komamiya, S, Krämer, T, Krasznahorkay, A, Krieger, P, Von Krogh, J, Kuhl, T, Kupper, M, Lafferty, GD, Landsman, H, Lanske, D, Lellouch, D, Letts, J, Levinson, L, Lillich, J, Lloyd, SL, Loebinger, FK, Lu, J, Ludwig, A, Ludwig, J, Mader, W, Marcellini, S, Martin, AJ, Mashimo, T, Mättig, P, McKenna, J, McPherson, RA, Meijers, F, Menges, W, Merritt, FS, Mes, H, Meyer, N, Michelini, A, Mihara, S, Mikenberg, G, Miller, DJ, Mohr, W, Mori, T, Mutter, A, Nagai, K, Nakamura, I, Nanjo, H, Neal, HA, O'Neale, SW, Oh, A, Oreglia, MJ, Orito, S, Pahl, C, Pásztor, G, Pater, JR, Pilcher, JE, Pinfold, J, Plane, DE, Pooth, O, Przybycień, M, Quadt, A, Rabbertz, K, Rembser, C, Renkel, P, Roney, JM, Rossi, AM, Rozen, Y, Runge, K, Sachs, K, Saeki, T, Sarkisyan, EKG, Schaile, AD, Schaile, O, Scharff-Hansen, P, Schieck, J, Schörner-Sadenius, T, Schröder, M, Schumacher, M, Seuster, R, Shears, TG, Shen, BC, Sherwood, P, Skuja, A, Smith, AM, Sobie, R, Söldner-Rembold, S, Spano, F, Stahl, A, Strom, D, Ströhmer, R, Tarem, S, Tasevsky, M, Teuscher, R, Thomson, MA, Torrence, E, Toya, D, Trigger, I, Trócsányi, Z, Tsur, E, Turner-Watson, MF, Ueda, I, Ujvári, B, Vollmer, CF, Vannerem, P, Vértesi, R, Verzocchi, M, Voss, H, Vossebeld, J, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wengler, T, Wermes, N, Wetterling, D, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Zer-Zion, D & Zivkovic, L 2009, '--Antihyperon correlations in Z0 decay and investigation of the baryon production mechanism', European Physical Journal C, vol. 64, no. 4, pp. 609-625. https://doi.org/10.1140/epjc/s10052-009-1175-z
Abbiendi G, Ainsley C, Åkesson PF, Alexander G, Anagnostou G, Anderson KJ et al. --Antihyperon correlations in Z0 decay and investigation of the baryon production mechanism. European Physical Journal C. 2009 Dec 1;64(4):609-625. https://doi.org/10.1140/epjc/s10052-009-1175-z
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, Sachio ; 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. / --Antihyperon correlations in Z0 decay and investigation of the baryon production mechanism. In: European Physical Journal C. 2009 ; Vol. 64, No. 4. pp. 609-625.
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title = "∑--Antihyperon correlations in Z0 decay and investigation of the baryon production mechanism",
abstract = "Data collected around √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 ∑- hyperons whose baryon number is compensated by the production of a ∑̄- Λ̄ Ξ ̄- 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 Λ Λ ̄ and p πp̄ correlations are not conclusive, if parameter uncertainties are considered.",
author = "G. Abbiendi and C. Ainsley and {\AA}kesson, {P. F.} and G. Alexander and G. Anagnostou and Anderson, {K. J.} and S. Asai and D. Axen and I. Bailey and E. Barberio and T. Barillari and Barlow, {R. J.} and Batley, {R. J.} and P. Bechtle and T. Behnke and Bell, {K. W.} and Bell, {P. J.} and G. Bella and A. Bellerive and G. Benelli and S. Bethke and O. Biebel and O. Boeriu and P. Bock and M. Boutemeur and S. Braibant and Brown, {R. M.} and Burckhart, {H. J.} and S. Campana and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and C. Ciocca and A. Csilling and M. Cuffiani and S. Dado and M. Dallavalle and {De Roeck}, A. and {De Wolf}, {E. A.} and K. Desch and B. Dienes and J. Dubbert and E. Duchovni and G. Duckeck and Duerdoth, {I. P.} and E. Etzion and F. Fabbri and P. Ferrari and F. Fiedler and I. Fleck and M. Ford and A. Frey and P. Gagnon and Gary, {J. W.} and C. Geich-Gimbel and G. Giacomelli and P. Giacomelli and M. Giunta and J. Goldberg and E. Gross and J. Grunhaus and M. Gruw{\'e} and A. Gupta and C. Hajdu and M. Hamann and Hanson, {G. G.} and A. Harel and M. Hauschild and Hawkes, {C. M.} and R. Hawkings and G. Herten and Heuer, {R. D.} and Hill, {J. C.} and D. Horv{\'a}th and P. Igo-Kemenes and K. Ishii and H. Jeremie and P. Jovanovic and Junk, {T. R.} and J. Kanzaki and D. Karlen and K. Kawagoe and T. Kawamoto and Keeler, {R. K.} and Kellogg, {R. G.} and Kennedy, {B. W.} and S. Kluth and T. Kobayashi and M. Kobel and Sachio Komamiya and T. Kr{\"a}mer and A. Krasznahorkay and P. Krieger and {Von Krogh}, J. and T. Kuhl and M. Kupper and Lafferty, {G. D.} and H. Landsman and D. Lanske and D. Lellouch and J. Letts and L. Levinson and J. Lillich and Lloyd, {S. L.} and Loebinger, {F. K.} and J. Lu and A. Ludwig and J. Ludwig and W. Mader and S. Marcellini and Martin, {A. J.} and T. Mashimo and P. M{\"a}ttig and J. McKenna and McPherson, {R. A.} and F. Meijers and W. Menges and Merritt, {F. S.} and H. Mes and N. Meyer and A. Michelini and S. Mihara and G. Mikenberg and Miller, {D. J.} and W. Mohr and T. Mori and A. Mutter and K. Nagai and I. Nakamura and H. Nanjo and Neal, {H. A.} and O'Neale, {S. W.} and A. Oh and Oreglia, {M. J.} and S. Orito and C. Pahl and G. P{\'a}sztor and Pater, {J. R.} and Pilcher, {J. E.} and J. Pinfold and Plane, {D. E.} and O. Pooth and M. Przybycień and A. Quadt and K. Rabbertz and C. Rembser and P. Renkel and Roney, {J. M.} and Rossi, {A. M.} and Y. Rozen and K. Runge and K. Sachs and T. Saeki and Sarkisyan, {E. K.G.} and Schaile, {A. D.} and O. Schaile and P. Scharff-Hansen and J. Schieck and T. Sch{\"o}rner-Sadenius and M. Schr{\"o}der and M. Schumacher and R. Seuster and Shears, {T. G.} and Shen, {B. C.} and P. Sherwood and A. Skuja and Smith, {A. M.} and R. Sobie and S. S{\"o}ldner-Rembold and F. Spano and A. Stahl and D. Strom and R. Str{\"o}hmer and S. Tarem and M. Tasevsky and R. Teuscher and Thomson, {M. A.} and E. Torrence and D. Toya and I. Trigger and Z. Tr{\'o}cs{\'a}nyi and E. Tsur and Turner-Watson, {M. F.} and I. Ueda and B. Ujv{\'a}ri and Vollmer, {C. F.} and P. Vannerem and R. V{\'e}rtesi and M. Verzocchi and H. Voss and J. Vossebeld and Ward, {C. P.} and Ward, {D. R.} and Watkins, {P. M.} and Watson, {A. T.} and Watson, {N. K.} and Wells, {P. S.} and T. Wengler and N. Wermes and D. Wetterling and Wilson, {G. W.} and Wilson, {J. A.} and G. Wolf and Wyatt, {T. R.} and S. Yamashita and D. Zer-Zion and L. Zivkovic",
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TY - JOUR

T1 - ∑--Antihyperon correlations in Z0 decay and investigation of the baryon production mechanism

AU - Abbiendi, G.

AU - Ainsley, C.

AU - Åkesson, P. F.

AU - Alexander, G.

AU - Anagnostou, G.

AU - Anderson, K. J.

AU - Asai, S.

AU - Axen, D.

AU - Bailey, I.

AU - Barberio, E.

AU - Barillari, T.

AU - Barlow, R. J.

AU - Batley, R. J.

AU - Bechtle, P.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bell, P. J.

AU - Bella, G.

AU - Bellerive, A.

AU - Benelli, G.

AU - Bethke, S.

AU - Biebel, O.

AU - Boeriu, O.

AU - Bock, P.

AU - Boutemeur, M.

AU - Braibant, S.

AU - Brown, R. M.

AU - Burckhart, H. J.

AU - Campana, S.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Ciocca, C.

AU - Csilling, A.

AU - Cuffiani, M.

AU - Dado, S.

AU - Dallavalle, M.

AU - De Roeck, A.

AU - De Wolf, E. A.

AU - Desch, K.

AU - Dienes, B.

AU - Dubbert, J.

AU - Duchovni, E.

AU - Duckeck, G.

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PY - 2009/12/1

Y1 - 2009/12/1

N2 - Data collected around √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 ∑- hyperons whose baryon number is compensated by the production of a ∑̄- Λ̄ Ξ ̄- 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 Λ Λ ̄ and p πp̄ correlations are not conclusive, if parameter uncertainties are considered.

AB - Data collected around √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 ∑- hyperons whose baryon number is compensated by the production of a ∑̄- Λ̄ Ξ ̄- 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 Λ Λ ̄ and p πp̄ correlations are not conclusive, if parameter uncertainties are considered.

UR - http://www.scopus.com/inward/record.url?scp=71249095579&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=71249095579&partnerID=8YFLogxK

U2 - 10.1140/epjc/s10052-009-1175-z

DO - 10.1140/epjc/s10052-009-1175-z

M3 - Article

VL - 64

SP - 609

EP - 625

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 4

ER -