MEASUREMENT OF THE PARTIAL WIDTH OF THE DECAY OF THE Z0 INTO CHARM QUARK PAIRS

Επιστημονική δημοσίευση - Άρθρο Περιοδικού uoadl:3044099 35 Αναγνώσεις

Μονάδα:
Ερευνητικό υλικό ΕΚΠΑ
Τίτλος:
MEASUREMENT OF THE PARTIAL WIDTH OF THE DECAY OF THE Z0 INTO CHARM QUARK
PAIRS
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
A determination of the partial width gamma-cc-BAR of the Z0 boson into
charm quark pairs is presented, based on a total sample of 36 900 Z0
hadronic decays measured with the DELPHI detector at the LEP collider.
The production rate of ccBAR events is derived from the inclusive
analysis of charged pions coming from the decay of charmed meson D*+
–> D0-pi+ and D*- –> DBAR0-pi- where the pi- +/- is constrained by
kinematics to have a low p(T) with respect to the jet axis. The
probability to procedure these pi- +/- from D* +/- decay in ccBAR
events is taken to be 0.31 +/- 0.05 as measured at square-root s = 10.55
GeV. The measured relative partial width GAMMA-ccBAR/GAMMA-h = 0.162 +/-
0.030 (stat.) +/- 0.050(syst.) is in good agreement with the standard
model value of 0.171. Together with our previous measurement of the
total hadronic width GAMMA-h this implies GAMMA-ccBAR = 282 +/-
53(stat.) +/- 88(syst.) MeV.
Έτος δημοσίευσης:
1990
Συγγραφείς:
Abreu, P
Adam, W
Adami, F
Adye, T
Alekseev, GD and
Allen, P
Almehed, S
Alted, F
Alvsvaag, SJ
Amaldi, U and
Anassontzis, E
Apel, WD
Asman, B
Astier, P
Augustin, JE
and Augustinus, A
Baillon, P
Bambade, P
Barao, F and
Barbiellini, G
Bardin, DY
Baroncelli, A
Barring, O and
Bartl, W
Bates, MJ
Baubillier, M
Becks, KH
Beeston, CJ
and Beilliere, P
Belokopytov, I
Beltran, P
Benedic, D and
Benlloch, JM
Berggren, M
Bertrand, D
Biagi, S
Bianchi, F
and Bibby, JH
Bilenky, MS
Billoir, P
Bjarne, J
Bloch, D
and Bogolubov, PN
Bollini, D
Bolognese, T
Bonapart, M and
Bonesini, M
Booth, PSL
Boratay, M
Borgeaud, P
Borner, H
and Bosio, C
Botner, O
Bouquet, B
Bozzo, M
Braibant, S
and Branchini, P
Brand, KD
Brenner, RA
Bricman, C
Brown,
RCA
Brummer, N
Brunet, JM
Bugge, L
Buran, T and
Burmeister, H
Buytaert, JAMA
Caccia, M
Calvi, M
Rozas,
AJC
Campagne, JE
Campion, A
Camporesi, T
Canale, V and
Cao, F
Carroll, L
Caso, C
Castelli, E
Gimenez, MVC and
Cattai, A
Cavallo, FRC
Cerrito, L
Charpentier, P and
Checchia, P
Chelkov, GA
Chevalier, L
Chliapnikov, P and
Chorowicz, V
Cirio, R
Clara, MP
Contreras, JL
Contri, R
and Cosme, G
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Crennell, D
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M
Crosetti, G
Crosland, N
Crozon, M
Maestro, JC and
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and Damgaard, G
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H
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PI
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Zhang, G
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Zumerle, G
Zuniga, J
DELPHI Collaboration
Περιοδικό:
PHYSICS LETTERS B
Εκδότης:
ELSEVIER SCIENCE BV
Τόμος:
252
Αριθμός / τεύχος:
1
Σελίδες:
140-148
Επίσημο URL (Εκδότης):
DOI:
10.1016/0370-2693(90)91096-T
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