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Measurement of the Effective Weak Mixing Angle in $p\bar{p}\rightarrow Z/\gamma^ \rightarrow \ell^+\ell^-$ Events

We present a measurement of the effective weak mixing angle parameter sin2θeffℓ in pp¯→Z/γ*→μ+μ- events at a center-of-mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron Collider and corresponding to 8.6  fb-1 of integrated luminosity. The measured value of sin2θeffℓ[μμ]=...

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Published in:Physical review letters 2018, Vol.120 (24)
Main Authors: Abazov, Victor Mukhamedovich, Abbott, Braden Keim, Acharya, Bannanje Sripath, Adams, Mark Raymond, Adams, Todd, Agnew, James P, Alexeev, Guennadi D, Alkhazov, Georgiy D, Alton, Andrew K, Askew, Andrew Warren, Atkins, Scott, Augsten, Kamil, Aushev, Volodymyr, Aushev, Yegor, Avila, Carlos A, Badaud, Frederique, Bagby, Linda F, Baldin, Boris, Bandurin, Dmitry V, Banerjee, Sunanda, Barberis, Emanuela, Baringer, Philip S, Bartlett, Jfrederick, Bassler, Ursula Rita, Bazterra, Victor, Bean, Alice L, Begalli, Marcia, Bellantoni, Leo, Beri, Suman B, Bernardi, Gregorio, Bernhard, Ralf Patrick, Bertram, Iain A, Besancon, Marc, Beuselinck, Raymond, Bhat, Pushpalatha C, Bhatia, Sudeep, Bhatnagar, Vipin, Blazey, Gerald Charles, Blessing, Susan K, Bloom, Kenneth A, Boehnlein, Amber S, Boline, Daniel Dooley, Boos, Edward E, Borissov, Guennadi, Borysova, Maryna, Brandt, Andrew, Brandt, Oleg, Brochmann, Michelle, Brock, Raymond L, Bross, Alan D, Brown, Duncan Paul, Bu, Xue-Bing, Buehler, Marc, Buescher, Volker, Bunichev, Viacheslav Yevgenyevich, Burdin, Sergey, Buszello, Claus Peter, Camacho-Perez, Enrique, Casey, Brendan Cameron Kieran, Castilla-Valdez, Heriberto, Caughron, Seth Aaron, Chakrabarti, Subhendu, Chan, Kwok Ming Leo, Chandra, Avdhesh, Chapon, Emilien, Chen, Guo, Cho, Sung-Woong, Choi, Suyong, Choudhary, Brajesh C, Cihangir, Selcuk, Claes, Daniel R, Clutter, Justace Randall, Cooke, Michael P, Cooper, William Edward, Corcoran, Marjorie D, Couderc, Fabrice, Cousinou, Marie-Claude, Cuth, Jakub, Cutts, David, Das, Amitabha, Davies, Gavin John, de Jong, Sijbrand Jan, de La Cruz-Burelo, Eduard, Deliot, Frederic, Demina, Regina, Denisov, Dmitri S, Denisov, Sergei P, Desai, Satish Vijay, Deterre, Cecile, Devaughan, Kayle Otis, Diehl, Hthomas, Diesburg, Michael, Ding, Pengfei, Dominguez, Daaron M, Drutskoy, Alexey, Dubey, Abhinav Kumar, Dudko, Lev V, Duperrin, Arnaud, Dutt, Suneel, Eads, Michael T
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Language:English
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Summary:We present a measurement of the effective weak mixing angle parameter sin2θeffℓ in pp¯→Z/γ*→μ+μ- events at a center-of-mass energy of 1.96 TeV, collected by the D0 detector at the Fermilab Tevatron Collider and corresponding to 8.6  fb-1 of integrated luminosity. The measured value of sin2θeffℓ[μμ]=0.23016±0.00064 is further combined with the result from the D0 measurement in pp¯→Z/γ*→e+e- events, resulting in sin2θeffℓ[comb]=0.23095±0.00040. This combined result is the most precise measurement from a single experiment at a hadron collider and is the most precise determination using the coupling of the Z/γ* to light quarks.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.120.241802