A MEASUREMENT OF THE W AND Z PRODUCTION CROSS-SECTIONS AND A DETERMINATION OF GAMMA-W AT THE CERN PBARP COLLIDER

被引：55

作者：

ALITTI, J

AMBROSINI, G

ANSARI, R

AUTIERO, D

BAREYRE, P

BERTRAM, IA

BLAYLOCK, G

BONAMY, P

BORER, K

BOURLIAUD, M

BUSKULIC, D

CARBONI, G

CAVALLI, D

CAVASINNI, V

CENCI, P

CHOLLET, JC

CONTA, C

COSTA, G

COSTANTINI, F

COZZI, L

CRAVERO, A

CURATOLO, M

DELLACQUA, A

DELPRETE, T

DEWOLF, RS

DILELLA, L

DUCROS, Y

EGAN, GF

EINSWEILER, KF

ESPOSITO, B

FAYARD, L

FEDERSPIEL, A

FERRARI, R

FRATERNALI, M

FROIDEVAUX, D

FUMAGALLI, G

GAILLARD, JM

GAINOTTI, F

GILDEMEISTER, O

GOSSLING, C

GOGGI, VG

GRUNENDAHL, S

HARA, K

HELLMAN, S

HRIVNAC, J

HUFNAGEL, H

HUGENTOBLER, E

HULTQVIST, K

IACOPINI, E

INCANDELA, J

机构：

[1] UNIV PAVIA,DIPARTIMENTO FIS NUCL & TEOR,I-27100 PAVIA,ITALY

[2] IST NAZL FIS NUCL,PAVIA,ITALY

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

[4] UNIV PISA,DIPARTIMENTO FIS,I-56100 PISA,ITALY

[5] IST NAZL FIS NUCL,PISA,ITALY

[6] UNIV MELBOURNE,SCH PHYS,PARKVILLE,VIC 3052,AUSTRALIA

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

[8] UNIV BERN,HOCHENERGIEPHYS LAB,CH-3012 BERN,SWITZERLAND

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

[10] IST NAZL FIS NUCL,MILAN,ITALY

[11] UNIV PERUGIA,DIPARTIMENTO FIS,I-06100 PERUGIA,ITALY

[12] IST NAZL FIS NUCL,PERUGIA,ITALY

[13] UNIV CAMBRIDGE,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

[14] UNIV DORTMUND,LEHRSTUHL EXPTL PHYS 4,W-4600 DORTMUND,GERMANY

[15] UNIV HEIDELBERG,INST HOCHENERGIEPHYS,W-6900 HEIDELBERG,GERMANY

[16] SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY

来源：

PHYSICS LETTERS B | 1992年 / 276卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1016/0370-2693(92)90333-Y

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The decays W --> ev and Z --> e+e- are studied in ppBAR collisions at square-root s = 630 GeV. The products of production cross section and branching ratio are measured as sigma(W)e = 682 +/- 12 +/- 40 pb and sigma(Z)e = 65.6 +/- 4.0 +/- 3.8 pb. The results are in good agreement with O (alpha(s)2) calculations of the production cross sections. Many systematic effects cancel in the ratio, R = 10.4 +/- 0.6(0.7) +/- 0.3, which can be used to give an indirect measurement of the total width of the W boson: GAMMA(W) = 2.10 +/- 0.13 +/- 0.09 GeV. The width gives a limit on the top quark mass, m(top) > 53 GeV (95% CL), which is independent of the top decay mode.

引用

页码：365 / 374

页数：10

共 35 条

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