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Measurement of the Effective Weak Mixing Angle in pp[over ¯]→Z/γ
Abazov, V M; Abbott, B; Acharya, B S; Adams, M; Adams, T; Agnew, J P; Alexeev, G D; Alkhazov, G; Alton, A; Askew, A; Atkins, S; Augsten, K; Avila, C; Badaud, F; Bagby, L; Baldin, B; Bandurin, D V; Banerjee, S; Barberis, E; Baringer, P; Bartlett, J F; Bassler, U; Bazterra, V; Bean, A; Begalli, M; Bellantoni, L; Beri, S B; Bernardi, G; Bernhard, R; Bertram, I; Besançon, M; Beuselinck, R; Bhat, P C; Bhatia, S; Bhatnagar, V; Blazey, G; Blessing, S; Bloom, K; Boehnlein, A; Boline, D; Boos, E E; Borissov, G; Borysova, M; Brandt, A; Brandt, O; Brock, R; Bross, A; Brown, D; Bu, X B; Buehler, M.
Afiliação
  • Abazov VM; Joint Institute for Nuclear Research, Dubna, Russia.
  • Abbott B; University of Oklahoma, Norman, Oklahoma 73019, USA.
  • Acharya BS; Tata Institute of Fundamental Research, Mumbai, India.
  • Adams M; University of Illinois at Chicago, Chicago, Illinois 60607, USA.
  • Adams T; Florida State University, Tallahassee, Florida 32306, USA.
  • Agnew JP; The University of Manchester, Manchester M13 9PL, United Kingdom.
  • Alexeev GD; Joint Institute for Nuclear Research, Dubna, Russia.
  • Alkhazov G; Petersburg Nuclear Physics Institute, St. Petersburg, Russia.
  • Alton A; University of Michigan, Ann Arbor, Michigan 48109, USA.
  • Askew A; Florida State University, Tallahassee, Florida 32306, USA.
  • Atkins S; Louisiana Tech University, Ruston, Louisiana 71272, USA.
  • Augsten K; Czech Technical University in Prague, Prague, Czech Republic.
  • Avila C; Universidad de los Andes, Bogotá, Colombia.
  • Badaud F; LPC, Université Blaise Pascal, CNRS/IN2P3, Clermont, France.
  • Bagby L; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Baldin B; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Bandurin DV; University of Virginia, Charlottesville, Virginia 22904, USA.
  • Banerjee S; Tata Institute of Fundamental Research, Mumbai, India.
  • Barberis E; Northeastern University, Boston, Massachusetts 02115, USA.
  • Baringer P; University of Kansas, Lawrence, Kansas 66045, USA.
  • Bartlett JF; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Bassler U; CEA, Irfu, SPP, Saclay, France.
  • Bazterra V; University of Illinois at Chicago, Chicago, Illinois 60607, USA.
  • Bean A; University of Kansas, Lawrence, Kansas 66045, USA.
  • Begalli M; Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil.
  • Bellantoni L; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Beri SB; Panjab University, Chandigarh, India.
  • Bernardi G; LPNHE, Universités Paris VI and VII, CNRS/IN2P3, Paris, France.
  • Bernhard R; Physikalisches Institut, Universität Freiburg, Freiburg, Germany.
  • Bertram I; Lancaster University, Lancaster LA1 4YB, United Kingdom.
  • Besançon M; CEA, Irfu, SPP, Saclay, France.
  • Beuselinck R; Imperial College London, London SW7 2AZ, United Kingdom.
  • Bhat PC; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Bhatia S; University of Mississippi, University, Mississippi 38677, USA.
  • Bhatnagar V; Panjab University, Chandigarh, India.
  • Blazey G; Northern Illinois University, DeKalb, Illinois 60115, USA.
  • Blessing S; Florida State University, Tallahassee, Florida 32306, USA.
  • Bloom K; University of Nebraska, Lincoln, Nebraska 68588, USA.
  • Boehnlein A; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Boline D; State University of New York, Stony Brook, New York 11794, USA.
  • Boos EE; Moscow State University, Moscow, Russia.
  • Borissov G; Lancaster University, Lancaster LA1 4YB, United Kingdom.
  • Borysova M; Taras Shevchenko National University of Kyiv, Kiev, Ukraine.
  • Brandt A; University of Texas, Arlington, Texas 76019, USA.
  • Brandt O; II. Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany.
  • Brock R; Michigan State University, East Lansing, Michigan 48824, USA.
  • Bross A; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Brown D; LPNHE, Universités Paris VI and VII, CNRS/IN2P3, Paris, France.
  • Bu XB; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • Buehler M; Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
Phys Rev Lett ; 115(4): 041801, 2015 Jul 24.
Article em En | MEDLINE | ID: mdl-26252676
ABSTRACT
We present a measurement of the fundamental parameter of the standard model, the weak mixing angle sin^{2}θ_{eff}^{ℓ} which determines the relative strength of weak and electromagnetic interactions, in pp[over ¯]→Z/γ^{*}→e^{+}e^{-} events at a center of mass energy of 1.96 TeV, using data corresponding to 9.7 fb^{-1} of integrated luminosity collected by the D0 detector at the Fermilab Tevatron. The effective weak mixing angle is extracted from the forward-backward charge asymmetry as a function of the invariant mass around the Z boson pole. The measured value of sin^{2}θ_{eff}^{ℓ}=0.23147±0.00047 is the most precise measurement from light quark interactions to date, with a precision close to the best LEP and SLD results.
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Base de dados: MEDLINE Idioma: En Ano de publicação: 2015 Tipo de documento: Article
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Base de dados: MEDLINE Idioma: En Ano de publicação: 2015 Tipo de documento: Article