Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic Z decays and the extraction of the gluon splitting into b(b)over-bar

Επιστημονική δημοσίευση - Άρθρο Περιοδικού uoadl:3052245 36 Αναγνώσεις

Μονάδα:
Ερευνητικό υλικό ΕΚΠΑ
Τίτλος:
Measurement of the rate of b(b)over-bar-b(b)over-bar events in hadronic
Z decays and the extraction of the gluon splitting into b(b)over-bar
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
The rate Z –> b (b) over bar b (b) over bar was measured using about 2
x 10(6) hadronic decays collected by the DELPHI experiment in 1994 and
1995. Events were forced into 3-jets with y(min) > 0.06 and a b-tag was
required for every jet. The rate was measured to be: R-4b = BR(Z –> b
(b) over bar b (b) over bar/BR(Z –> hadrons), = (6.0 +/- 1.9(stat.) +/-
1.4(syst.)) x 10(-4) where the invariant mass of every b (b) over bar
system is above twice the b quark mass. Using the value of R-4b the
probability of secondary production of a b (b) over bar pair from a
gluon per hadronic Z decay, g(bb), was extracted and found to be: g(bb)
= (3.3 +/- 1.0(stat.) +/- 0.8(syst.)) x 10(-3). (C) 1999 Published by
Elsevier Science B.V. All rights reserved.
Έτος δημοσίευσης:
1999
Συγγραφείς:
Abreu, P
Adam, W
Adye, T
Adzic, P
Ajinenko, I and
Albrecht, Z
Alderweireld, T
Alekseev, GD
Alemany, R and
Allmendinger, T
Allport, PP
Almehed, S
Amaldi, U and
Amapane, N
Amato, S
Anassontzis, EG
Andersson, P and
Andreazza, A
Andringa, S
Antilogus, P
Apel, WD
Arnoud, Y
and Asman, B
Augustin, JE
Augustinus, A
Baillon, P and
Ballestrero, A
Bambade, P
Barao, F
Barbiellini, G and
Barbier, R
Bardin, DY
Barker, G
Baroncelli, A
Battaglia,
M
Baubillier, M
Becks, KH
Begalli, M
Behrmann, A and
Beilliere, P
Belokopytov, Y
Benekos, NC
Benvenuti, AC and
Berat, C
Berggren, M
Bertini, D
Bertrand, D
Besancon, M
and Bigi, M
Bilensky, MS
Bizouard, MA
Bloch, D
Blom, HM
and Bonesini, M
Bonivento, W
Boonekamp, M
Booth, PSL and
Borgland, AW
Borisov, G
Bosio, C
Botner, O
Boudinov, E
and Bouquet, B
Bourdarios, C
Bowcock, TJV
Boyko, I and
Bozovic, I
Bozzo, M
Branchini, P
Brenke, T
Brenner, RA
and Bruckman, P
Brunet, JM
Bugge, L
Buran, T and
Burgsmueller, T
Buschbeck, B
Buschmann, P
Cabrera, S and
Caccia, M
Calvi, M
Camporesi, T
Canale, V
Carena, F and
Carroll, L
Caso, C
Gimenez, MVC
Cattai, A
Cavallo, FR
and Chabaud, V
Charpentier, P
Chaussard, L
Checchia, P and
Chelkov, GA
Chierici, R
Chliapnikov, P
Chochula, P and
Chorowicz, V
Chudoba, J
Cieslik, K
Collins, P
Contri, R
and Cortina, E
Cosme, G
Cossutti, F
Cowell, JH
Crawley,
HB
Crennell, D
Crepe, S
Crosetti, G
Maestro, JC and
Czellar, S
Davenport, M
Da Silva, W
Deghorain, A
Della
Ricca, G
Delpierre, P
Demaria, N
De Angelis, A
De Boer,
W
De Clercq, C
De Lotto, B
De Min, A
De Paula, L and
Dijkstra, H
Di Ciaccio, L
Dolbeau, J
Doroba, K
Dracos, M
and Drees, J
Dris, M
Duperrin, A
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Ekspong, G
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Fassouliotis, D
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J
Feindt, M
Ferrari, P
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Ferrer-Ribas, E and
Ferro, F
Fichet, S
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Flagmeyer, U
Foeth, H
and Fokitis, E
Fontanelli, F
Franek, B
Frodesen, AG and
Fruhwirth, R
Fulda-Quenzer, F
Fuster, J
Galloni, A and
Gamba, D
Gamblin, S
Gandelman, M
Garcia, C
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Gaspar, M
Gasparini, U
Gavillet, P
Gazis, EN
Gele, D and
Gerdyukov, L
Ghodbane, N
Gil, I
Glege, F
Gokieli, R and
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Goncalves, P
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Gopal, G
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Grimm, HJ
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Grosdidier, G and
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Guy, J
Hahn, F
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S
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Herquet, P
Herr, H
and Hessing, TL
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Higon, E
Holmgren, SO
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PJ
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Hughes, GJ
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Jonsson, P
Joram, C
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P
Kapusta, F
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and Keranen, R
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Khovanski, NN and
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and Kurvinen, K
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Lapin, V
and Laugier, JP
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Leder, G
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Leitner, R
Lemonne, J
and Lenzen, G
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Lethuillier, M and
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Liko, D
Lipniacka, A
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D
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and Sekulin, R
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and Smirnova, O
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C
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and Tonazzo, A
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ML
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Ullaland, O
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Wicke, D
Wickens, JH and
Wilkinson, GR
Winter, M
Witek, M
Wolf, G
Yi, J and
Yushchenko, O
Zalewska, A
Zalewski, P
Zavrtanik, D and
Zevgolatakos, E
Zimin, NI
Zucchelli, GC
Zumerle, G and
DELPHI Collaboration
Περιοδικό:
PHYSICS LETTERS B
Εκδότης:
ELSEVIER SCIENCE BV
Τόμος:
462
Αριθμός / τεύχος:
3-4
Σελίδες:
425-439
Επίσημο URL (Εκδότης):
DOI:
10.1016/S0370-2693(99)00905-3
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