Measurement of sin2 θlept eff using eþe− pairs from γ=Z bosons produced in pp collisions at a center-of-momentum energy of 1.96 TeV

T. Aaltonen, S. Amerio, D. Amidei, A Anastassov, A. Annovi, J Antos, G. Apollinari, J. A. Appel, T Arisawa, A. Artikov, J. Asaadi, W Ashmanskas, B. Auerbach, A. Aurisano, F. Azfar, W Badgett, T. Bae, A. Barbaro-Galtieri, VE Barnes, BA Barnett, P. Barria, P. Bartoš, M. Bauce, F Bedeschi, S. Behari, G. Bellettini, J. Bellinger, D. Benjamin, A. Beretvas, A. Bhatti, K. Bland, B. Blumenfeld, A. Bocci, A. Bodek, D. Bortoletto, J. Boudreau, A. Boveia, L. Brigliadori, C. Bromberg, E. Brücken, J. Budagov, H. S. Budd, K. Burkett, G. Busetto, P. J. Bussey, P. Butti, A. Buzatu, A. Calamba, S. Camarda, M. Campanelli, F. Canelli, B. Carls, D. Carlsmith, R. Carosi, S. Carrillo, B. Casal, M. Casarsa, A. Pereiro Castro, P. Catastini, D. Cauz, Cavaliere, A. Cerri, L. Cerrito, Y. C. Chen, M. Chertok, G. Chiarelli, G. Chlachidze, K. Cho, D. Chokheli, A. Clark, C. Clarke, M. E. Convery, J. Conway, M. Corbo, M. Cordelli, C. A. Cox, D. J. Cox, M. Cremonesi, Daniel E. Cruz, J. Cuevas, R. Culbertson, N. d’Ascenzo, M. Datta, PD Barbaro, L. Demortier, L. Marchese, M. Deninno, F. Devoto, M. d’Errico, AD Canto, BD Ruzza, Dittmann, M. D’Onofrio, S. Donati, M. Dorigo, A. Driutti, K. Ebina, R. C. Edgar, R. Erbacher, S. Errede

2016

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Summary

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 sin2θlepteff, 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 sin2θlepteff is found to be 0.23248±0.00053. The combination with the previous CDF measurement based on μ+μ− pairs yields sin2θlepteff=0.23221±0.00046. This result, when interprete

Source type: Peer-reviewed study
Catalogue ID: BFmoef2u5h-hx070l

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