Measurement of sin2θeffleptusing e+e- pairs from γ∗/Z bosons produced in pp collisions at a center-of-momentum energy of 1.96 TeV
- Author(s): Aaltonen, T
- Amerio, S
- Amidei, D
- Anastassov, A
- Annovi, A
- Antos, J
- Apollinari, G
- Appel, JA
- Arisawa, T
- Artikov, A
- Asaadi, J
- Ashmanskas, W
- Auerbach, B
- Aurisano, A
- Azfar, F
- Badgett, W
- Bae, T
- Barbaro-Galtieri, A
- Barnes, VE
- Barnett, BA
- Barria, P
- Bartos, P
- Bauce, M
- Bedeschi, F
- Behari, S
- Bellettini, G
- Bellinger, J
- Benjamin, D
- Beretvas, A
- Bhatti, A
- Bland, KR
- Blumenfeld, B
- Bocci, A
- Bodek, A
- Bortoletto, D
- Boudreau, J
- Boveia, A
- Brigliadori, L
- Bromberg, C
- Brucken, E
- Budagov, J
- Budd, HS
- Burkett, K
- Busetto, G
- Bussey, P
- Butti, P
- Buzatu, A
- Calamba, A
- Camarda, S
- Campanelli, M
- Canelli, F
- Carls, B
- Carlsmith, D
- Carosi, R
- Carrillo, S
- Casal, B
- Casarsa, M
- Castro, A
- Catastini, P
- Cauz, D
- Cavaliere, V
- Cerri, A
- Cerrito, L
- Chen, YC
- Chertok, M
- Chiarelli, G
- Chlachidze, G
- Cho, K
- et al.
Published Web Location
https://doi.org/10.1103/PhysRevD.93.112016Abstract
© 2016 American Physical Society. At the Fermilab Tevatron proton-antiproton (pp) collider, Drell-Yan lepton pairs are produced in the process pp→e+e-+X through an intermediate γ∗/Z boson. The forward-backward asymmetry in the polar-angle distribution of the e- as a function of the e+e - pair mass is used to obtain sin2θefflept, the effective leptonic determination of the electroweak-mixing parameter sin2θW. The measurement sample, recorded by the Collider Detector at Fermilab (CDF), corresponds to 9.4 fb-1 of integrated luminosity from pp collisions at a center-of-momentum energy of 1.96 TeV, and is the full CDF Run II data set. The value of sin2θefflept is found to be 0.23248±0.00053. The combination with the previous CDF measurement based on μ+μ- pairs yields sin2θefflept=0.23221±0.00046. This result, when interpreted within the specified context of the standard model assuming sin2θW=1-MW2/MZ2 and that the W- and Z-boson masses are on-shell, yields sin2θW=0.22400±0.00045, or equivalently a W-boson mass of 80.328±0.024 GeV/c2.