MEASUREMENT OF THE B(0)-(B)OVER-BAR(0) MIXING PARAMETER AND THE Z-]B(B)OVER-BAR FORWARD-BACKWARD ASYMMETRY

被引：34

作者：

ACCIARRI, M ^{[37
]}

ADAM, A

ADRIANI, O

AGUILARBENITEZ, M

AHLEN, S

ALCARAZ, J

ALOISIO, A

ALVERSON, G

ALVIGGI, MG

AMBROSI, G

AN, Q

ANDERHUB, H

ANDERSON, AL

ANDREEV, VP

ANGELESCU, T

ANTONOV, L

ANTREASYAN, D

ALKHAZOV, G

ARCE, P

AREFIEV, A

AZEMOON, T

AZIZ, T

BABA, PVKS

BAGNAIA, P

BAKKEN, JA

BAKSAY, L

BALL, RC

BANERJEE, S

BANICZ, K

BARILLERE, R

BARONE, L

BASCHIROTTO, A

BASILE, M

BATTISTON, R

BAY, A

BECATTINI, F

BECKER, U

BEHNER, F

BENCZE, GL

BERDUGO, J

BERGES, P

BERTUCCI, B

BETEV, BL

BIASINI, M

BILAND, A

BILEI, GM

BIZZARRI, R

BLAISING, JJ

BOBBINK, GJ

BOCK, R

机构：

[1] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA

[2] JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA

[3] TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA

[4] BOSTON UNIV, BOSTON, MA 02215 USA

[5] NORTHEASTERN UNIV, BOSTON, MA 02115 USA

[6] UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA

[7] HARVARD UNIV, CAMBRIDGE, MA 02138 USA

[8] MIT, CAMBRIDGE, MA 02139 USA

[9] UNIV FLORENCE, I-50121 FLORENCE, ITALY

[10] UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND

[11] LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA

[12] UNIV NAPLES, I-80125 NAPLES, ITALY

[13] CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS

[14] OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA

[15] CALTECH, PASADENA, CA 91125 USA

[16] UNIV PERUGIA, I-06100 PERUGIA, ITALY

[17] CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA

[18] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[19] UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY

[20] ST PETERSBURG NUCL PHYS INST, ST PETERSBURG, RUSSIA

[21] HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY

[22] FBLJA PROJECT, WORLD LAB, CH-1211 GENEVA 23, SWITZERLAND

[23] UNIV LYON 1, IN2P3, CNRS, INST PHYS NUCL LYON, F-69622 VILLEURBANNE, FRANCE

[24] RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY

[25] RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY

[26] NIKHEF, NATL INST HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS

[27] IN2P3, CNRS, LAB ANNECY VIEUX PHYS PARTICULES, F-74941 ANNECY LE VIEUX, FRANCE

[28] INST HIGH ENERGY PHYS, 100039 BEIJING, PEOPLES R CHINA

[29] HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY

[30] INFN, I-40126 BOLOGNA, ITALY

[31] INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA

[32] INFN, I-50125 FLORENCE, ITALY

[33] CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND

[34] CHINESE UNIV SCI & TECHNOL, HEFEI 230029, PEOPLES R CHINA

[35] SEFT, HIGH ENERGY PHYS RES INST, SF-00014 HELSINKI, FINLAND

[36] CIEMAT, CTR INVEST ENERGET MEDIOAMBIENTALES & TECNOL, E-28040 MADRID, SPAIN

[37] INFN, I-20133 MILAN, ITALY

[38] INST THEORET & EXPTL PHYS, MOSCOW, RUSSIA

[39] INFN, I-80125 NAPLES, ITALY

[40] UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS

[41] NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS

[42] INFN, PERUGIA, ITALY

[43] INFN, ROME, ITALY

[44] UNIV CALIF SAN DIEGO, LA JOLLA, CA 92093 USA

[45] BULGARIAN ACAD SCI, INST MECHATRON, BU-1113 SOFIA, BULGARIA

[46] UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN

[47] KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA

[48] PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND

[49] UNIV ALABAMA, UNIVERSITY, AL 35486 USA

[50] DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY

来源：

PHYSICS LETTERS B | 1994年 / 335卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(94)90391-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the time integrated B0-BBAR0 mixing parameter and the forward-backward asymmetry in the process e+e- --> bbBAR using hadronic events containing muons or electrons. The data sample corresponds to 1,044,000 hadronic decays of the Z. From a fit to the momentum and transverse momentum distributions for single lepton and dilepton events, we have determined the B0-BBAR0 mixing parameter to be chi(B) = 0.123 +/- 0.012 (stat.) +/- 0.008 (sys.), and the bbBAR forward-backward asymmetry at the effective center-of-mass energy square-root s = 91.30 GeV to be A(bbBAR) = 0.087 +/- 0.011 (stat.) +/- 0.004 (sys.) This measurement corresponds to a value of the effective electroweak mixing angle of sin2thetaBAR(w) = 0.2335 +/- 0.0021.

引用

页码：542 / 553

页数：12

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