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A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole

Abdallah, J. ; Abreu, P. ; Adam, W. ; Adzic, P. ; Albrecht, T. ; Alemany-Fernandez, R. ; Allmendinger, T. ; Allport, P. P. ; Amaldi, U. and Amapane, N. , et al. (2011) In European Physical Journal C. Particles and Fields 71(2).
Abstract
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementary methods are used to reconstruct the energy of weakly decaying b-hadrons, E-B(weak). The average value of x(B)(weak) = E-B(weak)/E-beam is measured to be 0.699 +/- 0.011. The resulting x(B)(weak) distribution is then analysed in the framework of two choices for the perturbative contribution (parton shower and Next to Leading Log QCD calculation) in order to extract measurements of the non-perturbative contribution to be used in studies of b-hadron production in other experimental environments than LEP. In the parton shower framework, data favour the Lund model ansatz and corresponding values of its... (More)
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementary methods are used to reconstruct the energy of weakly decaying b-hadrons, E-B(weak). The average value of x(B)(weak) = E-B(weak)/E-beam is measured to be 0.699 +/- 0.011. The resulting x(B)(weak) distribution is then analysed in the framework of two choices for the perturbative contribution (parton shower and Next to Leading Log QCD calculation) in order to extract measurements of the non-perturbative contribution to be used in studies of b-hadron production in other experimental environments than LEP. In the parton shower framework, data favour the Lund model ansatz and corresponding values of its parameters have been determined within PYTHIA 6.156 from DELPHI data: a = 1.84(-0.21)(+0.23) and b = 0.642(-0.063)(+0.073) GeV-2, with a correlation factor rho = 92.2%. Combining the data on the b-quark fragmentation distributions with those obtained at the Z peak by ALEPH, OPAL and SLD, the average value of x(B)(weak) is found to be 0.7092 +/- 0.0025 and the non-perturbative fragmentation component is extracted. Using the combined distribution, a better determination of the Lund parameters is also obtained: a = 1.48(-0.10)(+0.11) and b = 0.509(-0.023)(+0.024) GeV-2, with a correlation factor rho = 92.6%. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C. Particles and Fields
volume
71
issue
2
publisher
Springer
external identifiers
  • wos:000291694100016
  • scopus:82955172078
ISSN
1434-6044
DOI
10.1140/epjc/s10052-011-1557-x
language
English
LU publication?
yes
id
e5097e94-d862-4143-bfa9-9ed0316da9e8 (old id 2053240)
date added to LUP
2016-04-01 13:32:44
date last changed
2023-03-02 05:47:51
@article{e5097e94-d862-4143-bfa9-9ed0316da9e8,
  abstract     = {{The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementary methods are used to reconstruct the energy of weakly decaying b-hadrons, E-B(weak). The average value of x(B)(weak) = E-B(weak)/E-beam is measured to be 0.699 +/- 0.011. The resulting x(B)(weak) distribution is then analysed in the framework of two choices for the perturbative contribution (parton shower and Next to Leading Log QCD calculation) in order to extract measurements of the non-perturbative contribution to be used in studies of b-hadron production in other experimental environments than LEP. In the parton shower framework, data favour the Lund model ansatz and corresponding values of its parameters have been determined within PYTHIA 6.156 from DELPHI data: a = 1.84(-0.21)(+0.23) and b = 0.642(-0.063)(+0.073) GeV-2, with a correlation factor rho = 92.2%. Combining the data on the b-quark fragmentation distributions with those obtained at the Z peak by ALEPH, OPAL and SLD, the average value of x(B)(weak) is found to be 0.7092 +/- 0.0025 and the non-perturbative fragmentation component is extracted. Using the combined distribution, a better determination of the Lund parameters is also obtained: a = 1.48(-0.10)(+0.11) and b = 0.509(-0.023)(+0.024) GeV-2, with a correlation factor rho = 92.6%.}},
  author       = {{Abdallah, J. and Abreu, P. and Adam, W. and Adzic, P. and Albrecht, T. and Alemany-Fernandez, R. and Allmendinger, T. and Allport, P. P. and Amaldi, U. and Amapane, N. and Amato, S. and Anashkin, E. and Andreazza, A. and Andringa, S. and Anjos, N. and Antilogus, P. and Apel, W-D. and Arnoud, Y. and Ask, S. and Asman, B. and Augustin, J. E. and Augustinus, A. and Baillon, P. and Ballestrero, A. and Bambade, P. and Barbier, R. and Bardin, D. and Barkerd, G. J. and Baroncelli, A. and Battaglia, M. and Baubillier, M. and Becks, K-H. and Begalli, M. and Behrmann, A. and Ben-Haim, E. and Benekos, N. and Benvenuti, A. and Berat, C. and Berggren, M. and Bertrand, D. and Besancon, M. and Besson, N. and Bloch, D. and Blom, M. and Bluj, M. and Bonesini, M. and Boonekamp, M. and Booth, P. S. L. and Borisov, G. and Botner, O. and Bouquet, B. and Bowcock, T. J. V. and Boyko, I. and Bracko, M. and Brenner, R. and Brodet, E. and Bruckman, P. and Brunet, J. M. and Buschbeck, B. and Buschmann, P. and Calvi, M. and Camporesi, T. and Canale, V. and Carena, F. and Castro, N. and Cavallo, F. and Chapkin, M. and Charpentier, Ph. and Checchia, P. and Chierici, R. and Chliapnikov, P. and Chudoba, J. and Chung, S. U. and Cieslik, K. and Collins, P. and Contri, R. and Cosme, G. and Cossutti, F. and Costa, M. J. and Crennell, D. and Cuevas, J. and D'Hondt, J. and da Silva, T. and Da Silva, W. and Della Ricca, G. and De Angelis, A. and De Boer, W. and De Clercq, C. and De Lotto, B. and De Maria, N. and De Min, A. and de Paula, L. and Di Ciaccio, L. and Di Simone, A. and Doroba, K. and Drees, J. and Eigen, G. and Ekelof, T. and Ellert, M. and Elsing, M. and Santo, M. C. Espirito and Fanourakis, G. and Fassouliotis, D. and Feindt, M. and Fernandez, J. and Ferrer, A. and Ferro, F. and Flagmeyer, U. and Foeth, H. and Fokitis, E. and Fulda-Quenzer, F. and Fuster, J. and Gandelman, M. and Garcia, C. and Gavillet, Ph. and Gazis, E. and Gokieli, R. and Golob, B. and Gomez-Ceballos, G. and Goncalves, P. and Graziani, E. and Grosdidier, G. and Grzelak, K. and Guy, J. and Haag, C. and Hallgren, A. and Hamacher, K. and Hamilton, K. and Haug, S. and Hauler, F. and Hedberg, Vincent and Hennecke, M. and Hoffman, J. and Holmgren, S-O. and Holt, P. J. and Houlden, M. A. and Jackson, J. N. and Jarlskog, Göran and Jarry, P. and Jeans, D. and Johansson, E. K. and Jonsson, P. and Joram, C. and Jungermann, L. and Kapusta, F. and Katsanevas, S. and Katsoufis, E. and Kernel, G. and Kersevan, B. P. and Kerzel, U. and King, B. T. and Kjaer, N. J. and Kluit, P. and Kokkinias, P. and Kourkoumelis, C. and Kouznetsov, O. and Krumstein, Z. and Kucharczyk, M. and Lamsa, J. and Leder, G. and Ledroit, F. and Leinonen, L. and Leitner, R. and Lemonne, J. and Lepeltier, V. and Lesiak, T. and Liebig, W. and Liko, D. and Lipniacka, A. and Lopes, J. H. and Lopez, J. M. and Loukas, D. and Lutz, P. and Lyons, L. and MacNaughton, J. and Malek, A. and Maltezos, S. and Mandl, F. and Marco, J. and Marco, R. and Marechal, B. and Margoni, M. and Marin, J-C. and Mariotti, C. and Markou, A. and Martinez-Rivero, C. and Masik, J. and Mastroyiannopoulos, N. and Matorras, F. and Matteuzzi, C. and Mazzucato, F. and Mazzucato, M. and Mc Nulty, R. and Meroni, C. and Migliore, E. and Mitaroff, W. and Mjörnmark, Ulf and Moa, T. and Moch, M. and Moenig, K. and Monge, R. and Montenegro, J. and Moraes, D. and Moreno, S. and Morettini, P. and Mueller, U. and Muenich, K. and Mulders, M. and Mundim, L. and Murray, W. and Muryn, B. and Myatt, G. and Myklebust, T. and Nassiakou, M. and Navarria, F. and Nawrocki, K. and Nemecek, S. and Nicolaidou, R. and Nikolenko, M. and Oblakowska-Mucha, A. and Obraztsov, V. and Olshevski, A. and Onofre, A. and Orava, R. and Osterberg, K. and Ouraou, A. and Oyanguren, A. and Paganoni, M. and Paiano, S. and Palacios, J. P. and Palka, H. and Papadopoulou, Th. D. and Pape, L. and Parkes, C. and Parodi, F. and Parzefall, U. and Passeri, A. and Passon, O. and Peralta, L. and Perepelitsa, V. and Perrotta, A. and Petrolini, A. and Piedra, J. and Pieri, L. and Pierre, F. and Pimenta, M. and Piotto, E. and Podobnik, T. and Poireau, V. and Pol, M. 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A. and Tyapkin, P. and Tzamarias, S. and Uvarov, V. and Valenti, G. and Van Dam, P. and Van Eldik, J. and Van Remortel, N. and Van Vulpen, I. and Vegni, G. and Veloso, F. and Venus, W. and Verdier, P. and Verzi, V. and Vilanova, D. and Vitale, L. and Vrba, V. and Wahlen, H. and Washbrook, A. J. and Weiser, C. and Wicke, D. and Wickens, J. and Wilkinson, G. and Winter, M. and Witek, M. and Yushchenko, O. and Zalewska, A. and Zalewski, P. and Zavrtanik, D. and Zhuravlov, V. and Zimin, N. I. and Zintchenko, A. and Zupan, M.}},
  issn         = {{1434-6044}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C. Particles and Fields}},
  title        = {{A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-011-1557-x}},
  doi          = {{10.1140/epjc/s10052-011-1557-x}},
  volume       = {{71}},
  year         = {{2011}},
}