MEASUREMENT OF THE AVERAGE LIFETIME OF B-HADRONS

被引：20

作者：

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

ARCE, P

AREFIEV, A

ATAMANCHUK, A

AZEMOON, T

AZIZ, T

BABA, PVKS

BAGNAIA, P

BAKKEN, JA

BALL, RC

BANERJEE, S

BAO, J

BARILLERE, R

BARONE, L

BASCHIROTTO, A

BATTISTON, R

BAY, A

BECATTINI, F

BECHTLUFT, J

BECKER, R

BECKER, U

BEHNER, F

BEHRENS, J

BENCZE, GL

BERDUGO, J

BERGES, P

BERTUCCI, B

BETEV, BL

BIASINI, M

BILAND, A

BILEI, GM

BIZZARRI, R

BLAISING, JJ

BOBBINK, GJ

BOCK, R

BOHM, A

机构：

[1] UNIV FLORENCE, I-50125 FLORENCE, ITALY

[2] RHEIN WESTFAL TH AACHEN, INST PHYS 1, W-5100 AACHEN, GERMANY

[3] RHEIN WESTFAL TH AACHEN, INST PHYS 3, W-5100 AACHEN, GERMANY

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

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

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

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

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

[9] INFN, I-40126 BOLOGNA, ITALY

[10] TATA INST FUNDAMENTAL RES, BOMBAY 400005, 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] CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND

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

[20] UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND

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

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

[23] LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA

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

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

[26] CIEMAT, E-28040 MADRID, SPAIN

[27] INFN, I-20133 MILAN, ITALY

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

[29] INFN, I-80125 NAPLES, ITALY

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

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

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

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

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

[35] CALTECH, PASADENA, CA 91125 USA

[36] INFN, I-06100 PERUGIA, ITALY

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

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

[39] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[40] INFN, I-00185 ROME, ITALY

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

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

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

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

[45] SHANGHAI INST CERAM, SHANGHAI, PEOPLES R CHINA

[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, UNIVERSITY, AL 35486 USA

[49] PURDUE UNIV, W LAFAYETTE, IN 47907 USA

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

来源：

PHYSICS LETTERS B | 1993年 / 317卷 / 03期

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1016/0370-2693(93)91027-K

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The average lifetime of b hadrons has been measured using the L3 detector at LEP, running at square-root s almost-equal-to M(Z). A b-enriched sample was obtained from 432 538 hadronic Z events collected in 1990 and 1991 by tagging electrons and muons from semileptonic b hadron decays. From maximum likelihood fits to the electron and muon impact parameter distributions, the average b hadron lifetime was measured to be tau(b) = (1535 +/- 35 +/- 28) fs, where the first error is statistical and the second includes both the experimental and the theoretical systematic uncertainties.

引用

页码：474 / 484

页数：11

共 37 条

[1]

ABREU P, 1992, Z PHYS C PART FIELDS, V53, P567, DOI 10.1007/BF01559733

[2] MEASUREMENT OF THE AVERAGE B-HADRON LIFETIME IN Z(0) DECAYS [J].

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 .

PHYSICS LETTERS B, 1992, 274 (3-4) :513-525

[3]

ACTON PD, 1993, UNPUB Z PHYS C

[4]

ADEVA B, 1991, Z PHYS C PART FIELDS, V51, P179, DOI [10.1007/BF01475788, 10.1007/BF01475789]

[5] 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

[6] THE CONSTRUCTION OF THE L3 EXPERIMENT [J].

ADEVA, B ;

AGUILARBENITEZ, M ;

AKBARI, H ;

ALCARAZ, J ;

ALOISIO, A ;

ALVAREZTAVIEL, J ;

ALVERSON, G ;

ALVIGGI, MG ;

ANDERHUB, H ;

ANDERSON, AL ;

ANGELOV, AM ;

ANGELOV, TH ;

ANTCHEV, GH ;

ANTONOV, L ;

ANTREASYAN, D ;

AREFIEV, A ;

ATANASOV, IH ;

AUROY, B ;

AYAD, R ;

AYRANOV, OL ;

AZEMOON, T ;

AZIZ, T ;

BACHMANN, U ;

BAHLER, P ;

BAKKEN, JA ;

BAKSAY, L ;

BALDINGER, H ;

BALL, RC ;

BALLANSAT, J ;

BANERJEE, S ;

BAO, J ;

BARBIER, G ;

BARONE, L ;

BASTI, G ;

BAY, A ;

BEAUVAIS, F ;

BECKER, U ;

BEISSEL, R ;

BENDIG, S ;

BENE, P ;

BERDUGO, J ;

BERGES, P ;

BERTHET, M ;

BERTSCH, Y ;

BETEV, BL ;

BILAND, A ;

BISCHOFF, A ;

BISCHOPS, M ;

BIZZARRI, R ;

BLAISING, JJ .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1990, 289 (1-2) :35-102

[7] XI-, XI-, LAMBDA-PRODUCTION AND LAMBDA-BAR-PRODUCTION IN SULFUR-TUNGSTEN INTERACTIONS AT 200 GEV/C PER NUCLEON [J].

ABATZIS, S ;

ANTINORI, F ;

BARNES, RP ;

BENAYOUN, M ;

BEUSCH, W ;

BLOODWORTH, IJ ;

BRAVAR, A ;

CARNEY, JN ;

DELACRUZ, B ;

DIBARI, D ;

DUFEY, JP ;

EVANS, D ;

FINI, R ;

FRENCH, BR ;

GHIDINI, B ;

GIRONE, M ;

HELSTRUP, H ;

HOLME, AK ;

JACHOLKOWSKI, A ;

KAHANE, J ;

KINSON, JB ;

KIRK, A ;

KNUDSON, K ;

LASSALLE, JC ;

LENTI, V ;

LERUSTE, P ;

FRANCES, LL ;

LOCONSOLE, RA ;

MALAMANT, A ;

MANZARI, V ;

NAVACH, F ;

NARJOUX, JL ;

PALANO, A ;

PENZO, A ;

QUERCIGH, E ;

ROSSI, L ;

SAFARIK, K ;

SENE, M ;

SENE, R ;

TAMAZOUZT, M ;

TRAINOR, MT ;

VASSILIADIS, G ;

BAILLIE, OV ;

VOLTE, A ;

VOTRUBA, MF .

PHYSICS LETTERS B, 1991, 270 (01) :123-127

[8] INCLUSIVE J-PRODUCTION IN Z(0) DECAYS [J].

ADRIANI, O ;

AGUILARBENITEZ, M ;

AHLEN, S ;

AKBARI, H ;

ALCARAZ, J ;

ALOISIO, A ;

ALVERSON, G ;

ALVIGGI, MG ;

AMBROSI, G ;

AN, Q ;

ANDERHUB, H ;

ANDERSON, AL ;

ANDREEV, VP ;

ANGELOV, T ;

ANTONOV, L ;

ANTREASYAN, D ;

ARCE, P ;

AREFIEV, A ;

ATAMANCHUK, A ;

AZEMOON, T ;

AZIZ, T ;

BABA, PVKS ;

BAGNAIA, P ;

BAKKEN, JA ;

BAKSAY, L ;

BALL, RC ;

BANERJEE, S ;

BAO, J ;

BARILLERE, R ;

BARONE, L ;

BATTISTON, R ;

BAY, A ;

BECATTINI, F ;

BECKER, U ;

BEHNER, F ;

BEHRENS, J ;

BEINGESSNER, S ;

BENCZE, GL ;

BERDUGO, J ;

BERGES, P ;

BERTUCCI, B ;

BETEV, BL ;

BIASINI, M ;

BILAND, A ;

BILEI, GM ;

BIZZARRI, R ;

BLAISING, JJ ;

BLUMENFELD, B ;

BOBBINK, GJ ;

BOCCIOLINI, M .

PHYSICS LETTERS B, 1992, 288 (3-4) :412-420

[9] MEASUREMENT OF GAMMA-B(B)OVER-BAR/GAMMA(HAD) FROM HADRONIC DECAYS OF THE Z [J].

ADRIANI, O ;

AGUILARBENITEZ, M ;

AHLEN, S ;

ALCARAZ, J ;

ALOISIO, A ;

ALVERSON, G ;

ALVIGGI, MG ;

AMBROSI, G ;

AN, Q ;

ANDERHUB, H ;

ANDERSON, AL ;

ANDREEV, VP ;

ANTONOV, L ;

ANTREASYAN, D ;

ARCE, P ;

AREFIEV, A ;

ATAMANCHUK, A ;

AZEMOON, T ;

AZIZ, T ;

BABA, PVKS ;

BACHMANN, S ;

BAGNAIA, P ;

BAKKEN, JA ;

BAKSAY, L ;

BALL, RC ;

BANERJEE, S ;

BAO, J ;

BARILLERE, R ;

BARONE, L ;

BASCHIROTTO, A ;

BATTISTON, R ;

BAY, A ;

BECATTINI, F ;

BECKER, U ;

BEHNER, F ;

BEHRENS, J ;

BENCZE, GL ;

BERDUGO, J ;

BERGES, P ;

BERTUCCI, B ;

BETEV, BL ;

BIASINI, M ;

BILAND, A ;

BILEI, GM ;

BIZZARRI, R ;

BLAISING, JJ ;

BOBBINK, GJ ;

BOCK, R ;

BOHM, A ;

BORGIA, B .

PHYSICS LETTERS B, 1993, 307 (1-2) :237-246

[10] STUDY OF INCLUSIVE SEMILEPTONIC-B MESON DECAYS [J].

ALBRECHT, H .

PHYSICS LETTERS B, 1990, 249 (02) :359-365

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