MEASURING OF THE Z(0)BRANCHING FRACTION TO B QUARK PARIS USING THE BOOSTED SPHERICITY PRODUCT

被引：12

作者：

ABREU, P

ADAM, W

ADAMI, F

ADYE, T

AKESSON, T

ALEKSEEV, GD

ALLEN, P

ALMEHED, S

ALVSVAAG, SJ

AMALDI, U

ANASSONTZIS, EG

ANTILOGUS, P

APEL, WD

APSIMON, RJ

ASMAN, B

AUGUSTIN, JE

AUGUSTINUS, A

BAILLON, P

BAMBADE, P

BARAO, F

BARATE, R

BARBIELLINI, G

BARDIN, DY

BARONCELLI, A

BARRING, O

BARTL, W

BATES, MJ

BATTAGLIA, M

BAUBILLIER, M

BECKS, KH

BEESTON, CJ

BEGALLI, M

BEILLIERE, P

BELOKOPYTOV, Y

BELTRAN, P

BENEDIC, D

BENLLOCH, JM

BERGGREN, M

BERTRAND, D

BIANCHI, F

BILENKY, MS

BILLOIR, P

BJARNE, J

BLOCH, D

BLYTH, S

BOCCI, V

BOGOLUBOV, PN

BOLOGNESE, T

BONESINI, M

BONIVENTO, W

机构：

[1] AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA

[2] CENS,DEPT PHYS PARTICULES ELEMENT,F-91191 GIF SUR YVETTE,FRANCE

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

[4] UNIV LUND,DEPT PHYS,S-22363 LUND,SWEDEN

[5] JOINT INST NUCL RES DUBNA,MOSCOW 101000,USSR

[6] UNIV VALENCIA,CSIC,INST FIS CORPUSCULAR,CTR MIXTO,VALENCIA,SPAIN

[7] UNIV VALENCIA,DEPT FIS ATOM MOLEC & NUCL,VALENCIA,SPAIN

[8] UNIV BERGAN,DEPT PHYS,N-5007 BERGEN,NORWAY

[9] CERN,CH-1211 GENEVA 23,SWITZERLAND

[10] UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE

[11] UNIV LYON 1,F-69622 VILLEURBANNE,FRANCE

[12] UNIV KARLSRUHE,INST EXPTL KERNPHYS,W-7500 KARLSRUHE,GERMANY

[13] UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN

[14] UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,F-91405 ORSAY,FRANCE

[15] NATL INST NUCL & HIGH ENERGY PHYS,SECT K,1009 DB AMSTERDAM,NETHERLANDS

[16] UNIV GRENOBLE 1,INST SCI NUCL,F-38026 ST MARTIN DHERES,FRANCE

[17] UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY

[18] IST NAZL FIS NUCL,I-34127 TRIESTE,ITALY

[19] UNIV UDINE,IST FIS,I-33100 UDINE,ITALY

[20] IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY

[21] UNIV OXFORD,NUCL PHYS LAB,OXFORD OX1 3RH,ENGLAND

[22] UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY

[23] IST NAZL FIS NUCL,I-20133 MILAN,ITALY

[24] UNIV PARIS 06,PHYS CHIM & PHYS MAT LAB,F-75230 PARIS 05,FRANCE

[25] UNIV PARIS 07,F-75230 PARIS 05,FRANCE

[26] UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY

[27] UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY

[28] IST NAZL FIS NUCL,I-16146 GENOA,ITALY

[29] COLL FRANCE,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE

[30] INST HIGH ENERGY PHYS SERPUKHOV,PROTVINO 142284,USSR

[31] NCSR DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE

[32] GRP DELPHI,CRN,DIV HAUTES ENERGIES,F-67037 STRASBOURG,FRANCE

[33] LEPSI,F-67037 STRASBOURG,FRANCE

[34] UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM

[35] VRIJE UNIV BRUSSELS,ULB,IIHE,B-1050 BRUSSELS,BELGIUM

[36] UNIV ETAT MONS,FAC SCI,SERV PHYS PARTICULES ELEMENTAIRES,B-7000 MONS,BELGIUM

[37] UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY

[38] IST NAZL FIS NUCL,I-10125 TURIN,ITALY

[39] UNIV ROME 2,DIPARTIMENTO FIS,I-00173 ROME,ITALY

[40] IST NAZL FIS NUCL TOR VERGATA,I-00173 ROME,ITALY

[41] UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,ENGLAND

[42] UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN

[43] UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY

[44] IST NAZL FIS NUCL,I-35131 PADUA,ITALY

[45] UNIV HELSINKI,DEPT HIGH ENERGY PHYS,SF-00170 HELSINKI 17,FINLAND

[46] UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY

[47] UNIV SANTANDER,FAC CIENCIAS,E-39005 SANTANDER,SPAIN

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

[49] IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY

[50] IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011

来源：

PHYSICS LETTERS B | 1992年 / 281卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(92)91159-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

From a sample of about 120 000 hadronic Z0 decays, using a technique based on a separation of the different event categories in the boosted sphericity product, the fraction of bbBAR decays has been measured to be 0.219 +/- 0.014 (stat) +/- 0.019 (syst). Using the DELPHI determination of the hadronic Z0 width, this corresponds to a partial width GAMMA(bbBAR) = 378 +/- 42 MeV (in good agreement with the standard model prediction of congruent-to 380 N eV). Combining this measurement with the determinations based on events with high p(t) leptons gives an estimate for the branching ratio of b into leptons at LEP of (11.2 +/- 1.2)%, consistent with previous determinations.

引用

页码：383 / 393

页数：11

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