Measurement of the W mass in e+e− collisions at production threshold

Barate, R. and Finch, Alexander (1997) Measurement of the W mass in e+e− collisions at production threshold. Physics Letters B, 401 (3-4). pp. 347-362. ISSN 0370-2693

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Abstract

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 σWW = 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: mW = 80.14 ± 0.34 (stat.) ± 0.09 (syst.) ± 0.03 (LEP energy) GeV/c2

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
64017
Deposited By:
Deposited On:
14 May 2013 14:41
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2020 03:55