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Precise measurement of the W-boson mass with the CDF II detector |
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| Authors: | Aaltonen T Álvarez González B Amerio S Amidei D Anastassov A Annovi A Antos J Apollinari G Appel J A Arisawa T Artikov A Asaadi J Ashmanskas W Auerbach B Aurisano A Azfar F Badgett W Bae T Barbaro-Galtieri A Barnes V E Barnett B A Barria P Bartos P Bauce M Bedeschi F Beecher D Behari S Bellettini G Bellinger J Benjamin D Beretvas A Bhatti A Binkley M Bisello D Bizjak I Bland K R Blumenfeld B Bocci A Bodek A Bortoletto D Boudreau J Boveia A Brigliadori L Bromberg C Brucken E Budagov J Budd H S Burkett K Busetto G Bussey P Buzatu A Calamba A Calancha C Camarda S Campanelli M Campbell M |
| Affiliation: | Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland. |
| Abstract: | We have measured the W-boson mass M(W) using data corresponding to 2.2 fb(-1) of integrated luminosity collected in pp collisions at sqrt[s] = 1.96 TeV with the CDF II detector at the Fermilab Tevatron collider. Samples consisting of 470,126 W → eν candidates and 624,708 W → μν candidates yield the measurement M(W) = 80,387 ± 12(stat.) ± 15(syst.) = 80,387 ± 19 MeV/c2. This is the most precise measurement of the W-boson mass to date and significantly exceeds the precision of all previous measurements combined. |
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