Measurement of the W mass in e(+)e(-) collisions at production threshold

被引：48

作者：

Barate, R

Buskulic, D

Decamp, D

Ghez, P

Goy, C

Lees, JP

Lucotte, A

Minard, MN

Nief, JY

Pietrzyk, B

Casado, MP

Chmeissani, M

Comas, P

Crespo, JM

Delfino, M

Fernandez, E

FernandezBosman, M

Garrido, L

Juste, A

Martinez, M

Miquel, R

Mir, LM

Orteu, S

Padilla, C

Park, IC

Pascual, A

Perlas, JA

Riu, I

Sanchez, F

Teubert, F

Colaleo, A

Creanza, D

dePalma, M

Gelao, G

Iaselli, G

Maggi, G

Maggi, M

Marinelli, N

Nuzzo, S

Ranieri, A

Raso, G

Ruggieri, F

Selvaggi, G

Silvestris, L

Tempesta, P

Tricomi, A

Zito, G

Huang, X

Lin, J

Ouyang, Q

机构：

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

[2] IST NAZL FIS NUCL, SEZ BARI, 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] UNIV CLERMONT FERRAND, PHYS CORPUSCULAIRE LAB, IN2P3, CNRS, F-63177 CLERMONT FERRAND, FRANCE

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

[7] DEMOCRITOS NUCL RES CTR, ATHENS, GREECE

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

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

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

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

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

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

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

[15] UNIV INNSBRUCK, INST EXPT PHYS, A-6020 INNSBRUCK, AUSTRIA

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

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

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

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

[20] IST NAZL FIS NUCL, SEZ MILANO, I-20133 MILAN, ITALY

[21] MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST PHYS, D-80805 MUNICH, GERMANY

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

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

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

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

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

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

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

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

[30] UNIV GESAMTHSCH SIEGEN, FACHBEREICH PHYS, D-57068 SIEGEN, GERMANY

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

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

[33] UNIV WASHINGTON, SEATTLE, WA 98195 USA

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

[35] IST NAZL FIS NUCL, DIPARTIMENTO FIS, I-95129 CATANIA, ITALY

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

[37] UNIV BARCELONA, BARCELONA 08208, SPAIN

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

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

[40] KANGNUNG NATL UNIV, KANGNUNG, SOUTH KOREA

来源：

PHYSICS LETTERS B | 1997年 / 401卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(97)00460-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In June 1996, the LEP centre-of-mass energy was raised to 161 GeV. Pair production of W bosons in e(+)e(-) collisions was observed for the first time by the LEP experiments. An integrated luminosity of 11 pb(-1) was recorded in the ALEPH detector, in which WW candidate events were observed. In 6 events both Ws decay leptonically. In 16 events, one W decays leptonically, the other into hadrons. In the channel where both Ws decay into hadrons, a signal was separated from the large background by means of several multi-variate analyses. The W pair cross-section is measured to be sigma(ww) = 4.23 +/- 0.73(stat.) +/- 0.19(syst.) pb. From this cross-section, the W mass is derived within the framework of the Standard Model: m(w) = 80.14 +/- 0.34(stat.) +/- 0.09(syst.) +/- 0.03(LEP energy) GeV/c(2) (C) 1997 Published by Elsevier Science B.V.

引用

页码：347 / 362

页数：16

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