MEASUREMENT OF B0-BBAR0 MIXING IN HADRONIC Z0 DECAYS

被引：22

作者：

ACTON, PD

ALEXANDER, G

ALLISON, J

ALLPORT, PP

ANDERSON, KJ

ARCELLI, S

ASHTON, P

ASTBURY, A

AXEN, D

AZUELOS, G

BAHAN, GA

BAINES, JTM

BALL, AH

BANKS, J

BARKER, GJ

BARLOW, RJ

BATLEY, JR

BEAUDOIN, G

BECK, A

BECKER, J

BEHNKE, T

BELL, KW

BELLA, G

BERLICH, P

BETHKE, S

BIEBEL, O

BINDER, U

BLOODWORTH, IJ

BOCK, P

BODEN, B

BOSCH, HM

BOUGEROLLE, S

BRABSON, BB

BREUKER, H

BROWN, RM

BRUN, R

BUIJS, A

BURCKHART, HJ

CAPILUPPI, P

CARNEGIE, RK

CARTER, AA

CARTER, JR

CHANG, CY

CHARLTON, DG

CLARKE, PEL

COHEN, I

COLLINS, WJ

CONBOY, JE

COOPER, M

COUCH, M

机构：

[1] TEL AVIV UNIV,DEPT PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL

[2] UNIV MANCHESTER,SCHUSTER LAB,DEPT PHYS,MANCHESTER M13 9PL,LANCS,ENGLAND

[3] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

[4] UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637

[5] UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637

[6] UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY

[7] IST NAZL FIS NUCL,BOLOGNA,ITALY

[8] UNIV MONTREAL,PHYS NUCL LAB,MONTREAL H3C 3J7,QUEBEC,CANADA

[9] UNIV MARYLAND,DEPT PHYS & ASTRON,COLLEGE PK,MD 20742

[10] UNIV LONDON,QUEEN MARY & WESTFIELD COLL,LONDON E1 4NS,ENGLAND

[11] UNIV FREIBURG,FAK PHYS,W-7800 FREIBURG,GERMANY

[12] UNIV HAMBURG,DESY,INST EXPTL PHYS,W-2000 HAMBURG 52,GERMANY

[13] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[14] UNIV HEIDELBERG,INST PHYS,W-6900 HEIDELBERG,GERMANY

[15] UNIV BONN,INST PHYS,W-5300 BONN 1,GERMANY

[16] UNIV BIRMINGHAM,SCH PHYS & SPACE RES,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND

[17] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405

[18] CERN,EUROPEAN ORG PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND

[19] CARLETON UNIV,DEPT PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA

[20] UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND

[21] TECHNION ISRAEL INST TECHNOL,DEPT PHYS,IL-32000 HAIFA,ISRAEL

[22] BIRBECK COLL,LONDON WC1E 7HU,ENGLAND

[23] CENS,F-91191 GIF SUR YVETTE,FRANCE

[24] UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521

[25] CARLETON UNIV,CTR RES PARTICLE PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA

[26] WEIZMANN INST SCI,DEPT NUCL PHYS,IL-76100 REHOVOT,ISRAEL

[27] UNIV TOKYO,INT CTR ELEMENTARY PARTICLE PHYS,TOKYO 113,JAPAN

[28] UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN

[29] KOBE UNIV,KOBE 657,JAPAN

[30] NATL RES COUNCIL CANADA,HERZBERG INST ASTROPHYS,OTTAWA K1A 0R6,ONTARIO,CANADA

[31] TRIUMF,VANCOUVER V6T 2A3,BC,CANADA

来源：

PHYSICS LETTERS B | 1992年 / 276卷 / 03期

基金：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(92)90335-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

From a sample of approximately 135 000 hadronic Z0 decays recorded with the OPAL detector, 1 536 events were selected with two lepton candidates, either electrons or muons. A signal for B0-B0BAR mixing was observed using the sign of the lepton charge to tag the charge of the b quark in decaying b-flavoured hadrons. A flavour discriminating variable was constructed from the lepton momentum and its component perpendicular to the jet axis. By fitting the fraction of events in which the two lepton charges are of the same sign, as a function of this variable, the average mixing parameter was measured to be chi = 0.145(-0.035)+0.041 +/- 0.018, where the first error is statistical and the second is systematic.

引用

页码：379 / 392

页数：14

共 34 条

[1] MEASUREMENTS OF Z0-]BBARB DECAYS AND THE SEMILEPTONIC BRANCHING RATIO BR(B-]L+X) [J].

ADEVA, B .

PHYSICS LETTERS B, 1991, 261 (1-2) :177-187

[2] A MEASUREMENT OF B0-BBAR0 MIXING IN Z0 DECAYS [J].

ADEVA, B .

PHYSICS LETTERS B, 1990, 252 (04) :703-712

[3]

AHMET K, 1991, NUCL INSTRUM METH A, V305, P275

[4]

AKRAWY MZ, 1990, Z PHYS C PART FIELDS, V47, P505

[5]

AKRAWY MZ, 1991, Z PHYS C PART FIELDS, V49, P375, DOI 10.1007/BF01549689

[6] A STUDY OF HEAVY FLAVOR PRODUCTION USING MUONS IN HADRONIC Z0 DECAYS [J].

AKRAWY, MZ .

PHYSICS LETTERS B, 1991, 263 (02) :311-324

[7] MEASUREMENT OF B0-BBAR0 MIXING AT THE CERN SPPBARS COLLIDER [J].

ALBAJAR, C ;

Albrow, MG ;

Allkofer, OC ;

Ankoviak, K ;

Apsimon, R ;

Aubert, B ;

Bacci, C ;

Bartha, S ;

Bauer, G ;

Bettini, A ;

Bezaguet, A ;

Biddulph, P ;

Bohn, H ;

Bohrer, A ;

Bonino, R ;

Bos, K ;

Botlo, M ;

Brockhausen, D ;

Buchanan, C ;

Buschbeck, B ;

Busetto, G ;

Caner, A ;

Casoli, P ;

Castilla-Valdez, H ;

Cavanna, F ;

Cennini, P ;

Centro, S ;

Ceradini, F ;

Ciapetti, G ;

Cittolin, S ;

Clayton, E ;

Cline, D ;

Colas, J ;

Conte, R ;

Coughlan, JA ;

Dau, D ;

Daum, C ;

Della Negra, M ;

Demoulin, M ;

Denegri, D ;

Dibon, H ;

DiCiaccio, A ;

Hedo, FJD ;

Dobrzynski, L ;

Dorenbosch, J ;

Dowell, JD ;

Drijard, D ;

Eggert, K ;

Eisenhandler, E ;

Ellis, N .

PHYSICS LETTERS B, 1991, 262 (01) :171-178

[8] SEARCH FOR B0-BBAR0 OSCILLATIONS AT THE CERN PROTON-ANTIPROTON COLLIDER [J].

ALBAJAR, C ;

ALBROW, MG ;

ALLKOFER, OC ;

ARNISON, G ;

ASTBURY, A ;

AUBERT, B ;

AXON, T ;

BACCI, C ;

BACON, T ;

BAINS, N ;

BATLEY, JR ;

BAUER, G ;

BEINGESSNER, S ;

BELLINGER, J ;

BETTINI, A ;

BEZAGUET, A ;

BOS, K ;

BUCKLEY, E ;

BUNCE, G ;

BUSETTO, G ;

CATZ, P ;

CENNINI, P ;

CENTRO, S ;

CERADINI, F ;

CHARLTON, DG ;

CIAPETTI, G ;

CITTOLIN, S ;

CLARKE, D ;

CLINE, D ;

COCHET, C ;

COLAS, J ;

COLAS, P ;

CORDEN, M ;

COUGHLAN, JA ;

COX, G ;

DAU, D ;

DEBEER, M ;

DEBRION, JP ;

DEGIORGI, M ;

DELLANEGRA, M ;

DEMOULIN, M ;

DENBY, B ;

DENEGRI, D ;

DICIACCIO, A ;

DOBRZYNSKI, L ;

DORENBOSCH, J ;

DOWELL, JD ;

DUCHOVNI, E ;

EDGECOCK, R ;

EGGERT, K .

PHYSICS LETTERS B, 1987, 186 (02) :247-254

[9] OBSERVATION OF B0-B-BAR-0 MIXING [J].

ALBRECHT, H ;

ANDAM, AA ;

BINDER, U ;

BOCKMANN, P ;

GLASER, R ;

HARDER, G ;

NIPPE, A ;

SCHAFER, M ;

SCHMIDTPARZEFALL, W ;

SCHRODER, H ;

SCHULZ, HD ;

WURTH, R ;

YAGIL, A ;

DONKER, JP ;

DRESCHER, A ;

KAMP, D ;

KOLANOSKI, H ;

MATTHIESEN, U ;

SCHECK, H ;

SPAAN, B ;

SPENGLER, J ;

WEGENER, D ;

EHMANN, C ;

GABRIEL, JC ;

RUF, T ;

SCHUBERT, KR ;

STIEWE, J ;

STRAHL, K ;

WALDI, R ;

WESELER, S ;

EDWARDS, KW ;

FRISKEN, WR ;

GILKINSON, DJ ;

GINGRICH, DM ;

KAPITZA, H ;

KIM, PCH ;

KUTSCHKE, R ;

MACFARLANE, DB ;

MCKENNA, JA ;

MCLEAN, KW ;

NILSSON, AW ;

ORR, RS ;

PADLEY, P ;

PARSONS, JA ;

PATEL, PM ;

PRENTICE, JD ;

SEYWERD, HCJ ;

SWAIN, JD ;

TSIPOLITIS, G ;

YOON, TS .

PHYSICS LETTERS B, 1987, 192 (1-2) :245-252

[10] MEASUREMENT OF THE Z0 LINE-SHAPE PARAMETERS AND THE ELECTROWEAK COUPLINGS OF CHARGED LEPTONS [J].

ALEXANDER, G .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1991, 52 (02) :175-207

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