Measurement of the W-pair cross-section and of the W mass in e(+)e(-) interactions at 172 GeV

Επιστημονική δημοσίευση - Άρθρο Περιοδικού uoadl:3050428 39 Αναγνώσεις

Μονάδα:
Ερευνητικό υλικό ΕΚΠΑ
Τίτλος:
Measurement of the W-pair cross-section and of the W mass in e(+)e(-)
interactions at 172 GeV
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
From a data sample of 9.98 pb(-1) integrated luminosity, collected by
DELPHI at a centre-of-mass energy of 172 GeV, 118 events were selected
as W-pair candidates. From these, the branching fraction Br(W –> q (q)
over bar) was measured to be 0.660(-0.037)(+0.036)(stat.) +/-
0.009(syst.) and the cross-section for the doubly resonant process
e(+)e(-) –> W+W- to be 11.58(-1.35)(+1.44)(stat.) +/- 0.32(syst.) pb.
The mass of the W boson, obtained from direct reconstruction of the
invariant mass of the fermion pairs in the decays WW –> lvq (q) over
bar and WW –> q (q) over bar q (q) over bar, was determined to be m(w)
= 80.22 +/- 0.41(stat.) +/- 0.04(syst.) +/- 0.05(int.) +/- 0.03(LEP)
GeV/c(2), where “int.” denotes the uncertainty from interconnection
effects like colour reconnection and Bose-Einstein interference.
Combined with the W mass obtained from the cross-sections measured by
DELPHI at threshold, a value of m(w) = 80.33 +/- 0.30(stat.) +/-
0.05(syst.) +/- 0.03(int.) +/- 0.03(LEP) GeV/c(2) was found.
Έτος δημοσίευσης:
1998
Συγγραφείς:
Abreu, P
Adam, W
Adye, T
Adzic, P
Ajinenko, I and
Alekseev, GD
Alemany, R
Allport, PP
Almehed, S
Amaldi, U
and Amato, S
Andersson, P
Andreazza, A
Antilogus, P and
Apel, WD
Arnoud, Y
Asman, B
Augustin, JE
Augustinus, A
and Baillon, P
Bambade, P
Barao, F
Barbiellier, M
Becks,
KH
Begalli, M
Beilliere, P
Belokopytov, Y
Belous, K and
Benvenuti, AC
Berat, C
Berggren, M
Bertini, D
Bertrand,
D
Besancon, M
Bianchi, F
Bigi, M
Bilenky, MS and
Billoir, P
Bizouard, MA
Bloch, D
Blume, M
Bonesini, M
and Bonivento, W
Boonekamp, M
Booth, PSL
Borgland, AW and
Borisov, G
Bosio, C
Botner, O
Boudinov, E
Bouquet, B and
Bourdarios, C
Bowcock, TJV
BOzovic, I
Bozzo, M and
Branchini, P
Brand, KD
Brenke, T
Brenner, RA
Brown, R
and Bruckman, P
Brunet, JM
Bugge, L
Buran, T and
Burgsmueller, T
Buschmann, P
Cabrera, S
Caccia, M
Calvi,
M
Rozas, AJC
Camporesi, T
Canale, V
Canepa, M and
Carena, F
Carroll, L
Caso, C
Gimenez, MVC
Cattai, A and
Cavallo, FR
Cerruti, C
Chaboud, V
Chalanda, N and
Charpentier, P
Chaussard, L
Checchia, P
Chelkov, GA and
Chen, M
Chierici, R
Chliapnikov, P
Chochula, P and
Chorowicz, V
Chudoba, J
Cindro, V
Collins, P
Colomer, M
and Contri, R
Cortina, E
Cosme, G
Cossutti, F
Cowell, JH
and Crawley, HB
Crennell, D
Crosetti, G
Maestro, JC and
Czellar, S
Dalmagne, B
Damgaard, G
Dauncey, PD and
Davenport, M
Da Silva, W
Deghorain, A
Della Ricca, G and
Delpierre, P
Demaria, N
De Angelis, A
De Boer, W
De
Brabandere, S
De Clercq, C
De la Vaissiere, C
De Lotto, B
and De Min, A
De Paula, L
Dijkstra, H
Di Ciaccio, L
Di
Diodato, A
Djannati, A
Dolbeau, J
Doroba, K
Dracos, M
and Drees, J
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Duperrin, A
Durand, JD
and Edsall, D
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Ekelof, T
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FM
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F
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Franek, B
Frodesen, AG
Fruhwirth, R and
Fulda-Quenzer, F
Fuster, J
Galloni, A
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Gavillet, P
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and Ghodbane, N
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P
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and Gris, P
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and Hahn, F
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Hamacher, K
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R
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and Hoorelbeke, S
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R
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and Kapusta, F
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NJ
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V
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and Martinez-Rivero, C
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Mc
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T
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FL
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and Obraztsov, V
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and Sannino, M
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Valenti, G
Vallazza, E
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Van
Apeldoorn, GW
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and Ventura, L
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Vrba, V
and Wahlen, H
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Wetherell, AM
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and Wickens, JH
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Williams, WSC
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Wolf, G
Yi, J
Yushchenko, O and
Zaitsev, A
Zalewska, A
Zalewski, P
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Zevgolatakos, E
Zimin, NI
Zucchelli, GC
Zumerle, G and
DELPHI Collaboration
Περιοδικό:
The European Physical Journal C - Particles and Fields
Εκδότης:
Springer-Verlag
Τόμος:
2
Αριθμός / τεύχος:
4
Σελίδες:
581-595
Επίσημο URL (Εκδότης):
DOI:
10.1007/s100520050163
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