B-ASTERISK PRODUCTION IN Z-DECAYS AT LEP

被引：35

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

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] 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 H, 1009 DB AMSTERDAM, NETHERLANDS

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

[5] LAB ANNECY LE VIEUX PHYS PARTICULES, CNRS, IN2P3, 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] NORTHEASTERN UNIV, BOSTON, MA 02215 USA

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

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

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

[15] HARVARD UNIV, CAMBRIDGE, MA 02139 USA

[16] MIT, CAMBRIDGE, MA 02139 USA

[17] IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY

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

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

[20] WORLD LAB, FBLIA PROJECT, CH-1211 GENEVA 23, SWITZERLAND

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

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

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

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

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

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

[27] CIEMAT, E-28040 MADRID, SPAIN

[28] INST THEORET & EXPTL PHYS, MOSCOW 117259, RUSSIA

[29] IST NAZL FIS NUCL, 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] IST NAZL FIS NUCL, 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] IST NAZL FIS NUCL, 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, SAN DIEGO, CA 92093 USA

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

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

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

[47] UNIV ALABAMA, TUSCALOOSA, AL 35486 USA

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

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

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

来源：

PHYSICS LETTERS B | 1995年 / 345卷 / 04期

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1016/0370-2693(95)01611-S

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The production of B* mesons in Z decays has been measured at LEP with the L3 detector. A sample of Z --> b ($) over bar b events was obtained by tagging muons in 1.6 million hadronic Z decays collected in 1991, 1992 and 1993. A signal with a peak value of E(y) = 46.3+/-1.9 (stat) MeV in the B rest frame energy spectrum was interpreted to come from the decay B* --> gamma B. The inclusive production ratio of B* mesons relative to B mesons was determined from a fit to the spectrum to be N-B*/(N-B* + N-B) = 0.76+/-0.08+/-0.06, where the first error is statistical and the second is systematic.

引用

页码：589 / 597

页数：9

共 50 条

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