Indirect measurement of $\sin^2 θ_W$ (or $M_W$) using $μ^+μ^-$ pairs from $γ^*/Z$ bosons produced in $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeV
Drell-Yan lepton pairs are produced in the process $p\bar{p} \rightarrow \mu^+\mu^- + X$ through an intermediate $\gamma^*/Z$ boson. The forward-backward asymmetry in the polar-angle distribution of the $\mu^-$ as a function of the invariant mass of the $\mu^+\mu^-$ pair is used to obtain the effect...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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2014
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| _version_ | 1797079193430786048 |
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| author | Collaboration, CDF Aaltonen, T Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Bae, T Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bedeschi, F |
| author_facet | Collaboration, CDF Aaltonen, T Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Bae, T Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bedeschi, F |
| author_sort | Collaboration, CDF |
| collection | OXFORD |
| description | Drell-Yan lepton pairs are produced in the process $p\bar{p} \rightarrow \mu^+\mu^- + X$ through an intermediate $\gamma^*/Z$ boson. The forward-backward asymmetry in the polar-angle distribution of the $\mu^-$ as a function of the invariant mass of the $\mu^+\mu^-$ pair is used to obtain the effective leptonic determination $\sin^2 \theta^{lept}_{eff}$ of the electroweak-mixing parameter $\sin^2 \theta_W$, from which the value of $\sin^2 \theta_W$ is derived assuming the standard model. The measurement sample, recorded by the Collider Detector at Fermilab (CDF), corresponds to 9.2 fb-1 of integrated luminosity from $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeV, and is the full CDF Run II data set. The value of $\sin^2 \theta^{lept}_{eff}$ is found to be 0.2315 +- 0.0010, where statistical and systematic uncertainties are combined in quadrature. When interpreted within the context of the standard model using the on-shell renormalization scheme, where $\sin^2 \theta_W = 1 - M_W^2/M_Z^2$, the measurement yields $\sin^2 \theta_W$ = 0.2233 +- 0.0009, or equivalently a W-boson mass of 80.365 +- 0.047 GeV/c^2. The value of the W-boson mass is in agreement with previous determinations in electron-positron collisions and at the Tevatron collider. |
| first_indexed | 2024-03-07T00:42:15Z |
| format | Journal article |
| id | oxford-uuid:837711d5-a429-435d-8a55-e0349d9bd371 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:42:15Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | oxford-uuid:837711d5-a429-435d-8a55-e0349d9bd3712022-03-26T21:44:22ZIndirect measurement of $\sin^2 θ_W$ (or $M_W$) using $μ^+μ^-$ pairs from $γ^*/Z$ bosons produced in $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeVJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:837711d5-a429-435d-8a55-e0349d9bd371Symplectic Elements at Oxford2014Collaboration, CDFAaltonen, TAmerio, SAmidei, DAnastassov, AAnnovi, AAntos, JApollinari, GAppel, JArisawa, TArtikov, AAsaadi, JAshmanskas, WAuerbach, BAurisano, AAzfar, FBadgett, WBae, TBarbaro-Galtieri, ABarnes, VBarnett, BBarria, PBartos, PBauce, MBedeschi, FDrell-Yan lepton pairs are produced in the process $p\bar{p} \rightarrow \mu^+\mu^- + X$ through an intermediate $\gamma^*/Z$ boson. The forward-backward asymmetry in the polar-angle distribution of the $\mu^-$ as a function of the invariant mass of the $\mu^+\mu^-$ pair is used to obtain the effective leptonic determination $\sin^2 \theta^{lept}_{eff}$ of the electroweak-mixing parameter $\sin^2 \theta_W$, from which the value of $\sin^2 \theta_W$ is derived assuming the standard model. The measurement sample, recorded by the Collider Detector at Fermilab (CDF), corresponds to 9.2 fb-1 of integrated luminosity from $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeV, and is the full CDF Run II data set. The value of $\sin^2 \theta^{lept}_{eff}$ is found to be 0.2315 +- 0.0010, where statistical and systematic uncertainties are combined in quadrature. When interpreted within the context of the standard model using the on-shell renormalization scheme, where $\sin^2 \theta_W = 1 - M_W^2/M_Z^2$, the measurement yields $\sin^2 \theta_W$ = 0.2233 +- 0.0009, or equivalently a W-boson mass of 80.365 +- 0.047 GeV/c^2. The value of the W-boson mass is in agreement with previous determinations in electron-positron collisions and at the Tevatron collider. |
| spellingShingle | Collaboration, CDF Aaltonen, T Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Apollinari, G Appel, J Arisawa, T Artikov, A Asaadi, J Ashmanskas, W Auerbach, B Aurisano, A Azfar, F Badgett, W Bae, T Barbaro-Galtieri, A Barnes, V Barnett, B Barria, P Bartos, P Bauce, M Bedeschi, F Indirect measurement of $\sin^2 θ_W$ (or $M_W$) using $μ^+μ^-$ pairs from $γ^*/Z$ bosons produced in $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeV |
| title | Indirect measurement of $\sin^2 θ_W$ (or $M_W$) using $μ^+μ^-$
pairs from $γ^*/Z$ bosons produced in $p\bar{p}$ collisions at a
center-of-momentum energy of 1.96 TeV |
| title_full | Indirect measurement of $\sin^2 θ_W$ (or $M_W$) using $μ^+μ^-$
pairs from $γ^*/Z$ bosons produced in $p\bar{p}$ collisions at a
center-of-momentum energy of 1.96 TeV |
| title_fullStr | Indirect measurement of $\sin^2 θ_W$ (or $M_W$) using $μ^+μ^-$
pairs from $γ^*/Z$ bosons produced in $p\bar{p}$ collisions at a
center-of-momentum energy of 1.96 TeV |
| title_full_unstemmed | Indirect measurement of $\sin^2 θ_W$ (or $M_W$) using $μ^+μ^-$
pairs from $γ^*/Z$ bosons produced in $p\bar{p}$ collisions at a
center-of-momentum energy of 1.96 TeV |
| title_short | Indirect measurement of $\sin^2 θ_W$ (or $M_W$) using $μ^+μ^-$
pairs from $γ^*/Z$ bosons produced in $p\bar{p}$ collisions at a
center-of-momentum energy of 1.96 TeV |
| title_sort | indirect measurement of sin 2 θ w or m w using μ μ pairs from γ z bosons produced in p bar p collisions at a center of momentum energy of 1 96 tev |
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