MEASUREMENTS OF THE B-BARYON LIFETIME

被引：25

作者：

BUSKULIC, D

CASPER, D

DEBONIS, I

DECAMP, D

GHEZ, P

GOY, C

LEES, JP

MINARD, MN

ODIER, P

PIETRZYK, B

ARIZTIZABAL, F

CHMEISSANI, M

CRESPO, JM

EFTHYMIOPOULOS, I

FERNANDEZ, E

FERNANDEZBOSMAN, M

GAITAN, V

GARRIDO, L

MARTINEZ, M

ORTEU, S

PACHECO, A

PADILLA, C

PALLA, F

PASCUAL, A

PERLAS, JA

SANCHEZ, F

TEUBERT, F

COLALEO, A

CREANZA, D

DEPALMA, M

FARILLA, A

GELAO, G

GIRONE, M

IASELLI, G

MAGGI, G

MARINELLI, N

NATALI, S

NUZZO, S

RANIERI, A

RASO, G

ROMANO, F

RUGGIERI, F

SELVAGGI, G

SILVESTRIS, L

TEMPESTA, P

ZITO, G

HUANG, X

LIN, J

OUYANG, Q

WANG, T

机构：

[1] UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, E-08193 BARCELONA, SPAIN

[2] IST NAZL FIS NUCL, DIPARTIMENTO FIS, I-70126 BARI, ITALY

[3] ACAD SINICA, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA

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

[5] NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK

[6] DEMOCRITOS NUCL RES CTR, ATHENS, GREECE

[7] UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND

[8] UNIV CLERMONT FERRAND, PHYS CORPUSCULAIRE LAB, CNRS, IN2P3, F-63177 CLERMONT FERRAND, FRANCE

[9] ECOLE POLYTECH, IN2P3, CNRS, PHYS NUCL & HAUTES ENERGIES LAB, F-91128 PALAISEAU, FRANCE

[10] UNIV FLORENCE, IST NAZL FIS NUCL, DIPARTIMENTO FIS, I-50125 FLORENCE, ITALY

[11] FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA

[12] IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY

[13] UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW G12 8QQ, LANARK, SCOTLAND

[14] UNIV HEIDELBERG, INST HOCHENERGIEPHYS, D-69120 HEIDELBERG, GERMANY

[15] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND

[16] UNIV INNSBRUCK, INST EXPTL PHYS, A-6020 INNSBRUCK, AUSTRIA

[17] UNIV LANCASTER, DEPT PHYS, LANCASTER LA1 4YB, ENGLAND

[18] UNIV MAINZ, INST PHYS, D-55099 MAINZ, GERMANY

[19] FAC SCI LUMINY, IN2P3, CNRS, CTR PHYS PARTICULES, F-13288 MARSEILLE, FRANCE

[20] MAX PLANCK INST PHYS & ASTROPHYS, D-80805 MUNICH, GERMANY

[21] UNIV PARIS 11, IN2P3, CNRS, LAB ACCELERATEUR LINEAIRE, F-91405 ORSAY, FRANCE

[22] UNIV PISA, IST NAZL FIS NUCL, DIPARTIMENTO FIS, I-56010 PISA, ITALY

[23] SCUOLA NORMALE SUPER PISA, I-56010 PISA, ITALY

[24] UNIV LONDON, ROYAL HOLLOWAY & BEDFORD NEW COLL, DEPT PHYS, SURREY TW20 0EX, ENGLAND

[25] RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND

[26] CTR ETUD SACLAY, CEA, DAPNIA, SERV PHYS PARTICULES, F-91191 GIF SUR YVETTE, FRANCE

[27] UNIV CALIF SANTA CRUZ, INST PARTICLE PHYS, SANTA CRUZ, CA 95064 USA

[28] UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S3 7RH, S YORKSHIRE, ENGLAND

[29] UNIV SIEGEN, FACHBEREICH PHYS, D-57068 SIEGEN, GERMANY

[30] UNIV TRIESTE, DIPARTMENTO FIS, I-34127 TRIESTE, ITALY

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

[32] UNIV WASHINGTON, SEATTLE, WA 98195 USA

[33] UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA

[34] UNIV TURIN, IST FIS GEN, TURIN, ITALY

[35] CNR, IST COSMOGEOFIS, I-10133 TURIN, ITALY

[36] KANGNUNG NATL UNIV, KANGNUNG, SOUTH KOREA

[37] UNIV SASSARI, IST MATEMAT & FIS, I-07100 SASSARI, ITALY

[38] CORNELL UNIV, NEWMAN LAB, ITHACA, NY 14853 USA

来源：

PHYSICS LETTERS B | 1995年 / 357卷 / 04期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/0370-2693(95)00980-Y

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using about 1.5 million hadronic Z decays recorded with the ALEPH detector, the lifetime of the b baryons has been measured using two independent data samples. From a maximum likelihood fit to the impact parameter distribution of leptons in 519 Lambda l(-) combinations containing a b baryon sample of 290 decays, the measured b baryon lifetime is tau(b-baryon) = 1.05(-0.11)(+0.12)(stat) +/-0.09(syst) ps. The lifetime of the Lambda(b)(0) baryon from a maximum likelihood fit to the proper time distribution of 58 Lambda(c)(+)l(-) candidates containing a Lambda(b)(0) sample of 44 decays, is tau(Lambda b0) = 1.02(-0.18)(+0.23)(stat) +/- 0.06(syst) ps.

引用

页码：685 / 698

页数：14

共 31 条

[1] DERIVING THE HARD THERMAL LOOPS OF QCD FROM CLASSICAL TRANSPORT-THEORY [J].

KELLY, PF ;

LIU, Q ;

LUCCHESI, C ;

MANUEL, C .

PHYSICAL REVIEW LETTERS, 1994, 72 (22) :3461-3463

[2] NEUTRAL STRANGE PARTICLE-PRODUCTION IN NEUTRINO AND ANTINEUTRINO CHARGED CURRENT INTERACTIONS ON PROTONS [J].

JONES, GT ;

JONES, RWL ;

KENNEDY, BW ;

ONEALE, SW ;

VILLALOBOSBAILLIE, O ;

KLEIN, H ;

MORRISON, DRO ;

SCHMID, P ;

WACHSMUTH, H ;

MILLER, DB ;

MOBAYYEN, MM ;

WAINSTEIN, S ;

ADERHOLZ, M ;

HANTKE, D ;

KATZ, UF ;

KERN, J ;

SCHMITZ, N ;

WITTEK, W ;

BORNER, HP ;

MYATT, G ;

RADOJICIC, D ;

BULLOCK, FW ;

BURKE, S .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1993, 57 (02) :197-209

[3] MEASUREMENT OF LAMBDA-B PRODUCTION AND LIFETIME IN Z0 HADRONIC DECAYS [J].

ABREU, P ;

ADAM, W ;

ADYE, T ;

AGASI, E ;

AJINENKO, I ;

ALEKSAN, R ;

ALEKSEEV, GD ;

ALGERI, A ;

ALLEN, P ;

ALMEHED, S ;

ALVSVAAG, SJ ;

AMALDI, U ;

ANDREAZZA, A ;

ANTILOGUS, P ;

APEL, WD ;

APSIMON, RJ ;

ARNOUD, Y ;

ASMAN, B ;

AUGUSTIN, JE ;

AUGUSTINUS, A ;

BAILLON, P ;

BAMBADE, P ;

BARAO, F ;

BARATE, R ;

BARBIELLINI, G ;

BARDIN, DY ;

BARKER, GJ ;

BARONCELLI, A ;

BARRING, O ;

BARRIO, JA ;

BARTL, W ;

BATES, MJ ;

BATTAGLIA, M ;

BAUBILLIER, M ;

BECKS, KH ;

BEESTON, CJ ;

BEGALLI, M ;

BEILLIERE, P ;

BELOKOPYTOV, Y ;

BELTRAN, P ;

BENEDIC, D ;

BENVENUTI, AC ;

BERGGREN, M ;

BERTRAND, D ;

BIANCHI, F ;

BILENKY, MS ;

BILLOIR, P ;

BJARNE, J ;

BLOCH, D ;

BLYTH, S .

PHYSICS LETTERS B, 1993, 311 (1-4) :379-390

[4]

ABREU P, 1994, Z PHYS C PART FIELDS, V61, P407, DOI 10.1007/BF01413179

[5] EVIDENCE FOR B-FLAVORED BARYON PRODUCTION IN Z(0)DECAYS AT LEP [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, 281 (3-4) :394-404

[6] RESULTS OF THE TROITSK EXPERIMENT ON THE SEARCH FOR THE ELECTRON ANTINEUTRINO REST MASS IN TRITIUM BETA-DECAY [J].

BELESEV, AI ;

BLEULE, AI ;

GERASKIN, EV ;

GOLUBEV, AA ;

GOLUBEV, NA ;

KAZACHENKO, OV ;

KIEV, EP ;

KUZNETSOV, YE ;

LOBASHEV, VM ;

OVCHINNIKOV, BM ;

PARFENOV, VI ;

SEKACHEV, IV ;

SOLODUKHIN, AP ;

TITOV, NA ;

YARYKIN, IE ;

ZAKHAROV, YI ;

BALASHOV, SN ;

SPIVAK, PE .

PHYSICS LETTERS B, 1995, 350 (02) :263-272

[7]

AKERS R, CERNPPE95051

[8]

AKERS R, CERNPPE95019

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

ALBRECHT, H .

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

[10]

BATIGNANI G, 1991, 1991 IEEE NUCL SCI S

← 1 2 3 4 →