MEASUREMENT OF THE WEAK CHARGED CURRENT STRUCTURE IN SEMILEPTONIC B-HADRON DECAYS AT THE Z-PEAK

被引:9
作者
ACCIARRI, M
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
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, Y
BERTUCCI, B
BETEV, BL
BIASINI, M
BILAND, A
BILEI, GM
BIZZARRI, R
BLAISING, JJ
BOBBINK, GJ
BOCK, R
BOHM, A
机构
[1] RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY
[2] RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY
[3] NIKHEF, NATL INST HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS
[4] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA
[5] CNRS, IN2P3, LAB ANNECY LE VIEUX PHYS PARTICULES, F-74941 ANNECY LE VIEUX, FRANCE
[6] JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA
[7] INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA
[8] HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY
[9] IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY
[10] TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA
[11] BOSTON UNIV, BOSTON, MA 02215 USA
[12] NORTHEASTERN UNIV, BOSTON, MA 02115 USA
[13] INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA
[14] UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA
[15] HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY
[16] HARVARD UNIV, CAMBRIDGE, MA 02139 USA
[17] MIT, CAMBRIDGE, MA 02139 USA
[18] IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY
[19] UNIV FLORENCE, I-50125 FLORENCE, ITALY
[20] CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND
[21] WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND
[22] UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND
[23] UNIV SCI & TECHNOL CHINA, HEFEI 230029, PEOPLES R CHINA
[24] SEFT, HIGH ENERGY PHYS RES INST, SF-00014 HELSINKI, FINLAND
[25] UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND
[26] LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA
[27] UNIV LYON 1, INST PHYS NUCL LYON, IN2P3, CNRS, F-69622 VILLEURBANNE, FRANCE
[28] CIEMAT, E-28040 MADRID, SPAIN
[29] INST THEORET & EXPTL PHYS, MOSCOW, RUSSIA
[30] IST NAZL FIS NUCL, I-80125 NAPLES, ITALY
[31] UNIV NAPLES, I-80125 NAPLES, ITALY
[32] UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS
[33] UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS
[34] NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS
[35] OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA
[36] CALTECH, PASADENA, CA 91125 USA
[37] IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY
[38] UNIV PERUGIA, I-06100 PERUGIA, ITALY
[39] CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA
[40] PRINCETON UNIV, PRINCETON, NJ 08544 USA
[41] IST NAZL FIS NUCL, I-00185 ROME, ITALY
[42] UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY
[43] INST PHYS NUCL LYON, ST PETERSBURG, RUSSIA
[44] UNIV CALIF SAN DIEGO, SAN DIEGO, CA 92093 USA
[45] UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN
[46] BULGARIAN ACAD SCI, INST MECHATRON, BU-1113 SOFIA, BULGARIA
[47] KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA
[48] UNIV ALABAMA, TUSCALOOSA, AL 35486 USA
[49] PURDUE UNIV, W LAFAYETTE, IN 47907 USA
[50] PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND
基金
匈牙利科学研究基金会;
关键词
D O I
10.1016/0370-2693(95)00401-6
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The neutrino energy spectrum in semileptonic b-hadron decays with identified energetic electrons and muons has been measured. The observed relative energy sharing between the neutrino and the charged lepton is found to be well described with a W-+/- polarization obtained from a free b-quark decay model with a (V-A)x(V-A) decay structure. The alternative of a (V+A) x(V-A) decay structure is excluded with a significance of more than 6 standard deviations. The possibility that hadronic corrections to the b-hadron decay destroy any W-+/- polarization is disfavored by more than 3 standard deviations.
引用
收藏
页码:375 / 386
页数:12
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