Model-independent measurement of the W-boson helicity in top-quark decays at D0
We present the first model-independent measurement of the helicity of W bosons produced in top quark decays, based on a 1fb-1 sample of candidate tt̄ events in the dilepton and lepton plus jets channels collected by the D0 detector at the Fermilab Tevatron pp̄ Collider. We reconstruct the angle θ* b...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Journal article |
| Lenguaje: | English |
| Publicado: |
2008
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| _version_ | 1826274482739740672 |
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| author | Abazov, V Abbott, B Abolins, M Acharya, B Adams, M Adams, T Aguilo, E Ahn, S Ahsan, M Alexeev, G Alkhazov, G Alton, A Alverson, G Alves, G Anastasoaie, M Ancu, L Andeen, T Anderson, S Andrieu, B Anzelc, MS Amoud, Y Arov, M Arthaud, M Askew, A Asman, B |
| author_facet | Abazov, V Abbott, B Abolins, M Acharya, B Adams, M Adams, T Aguilo, E Ahn, S Ahsan, M Alexeev, G Alkhazov, G Alton, A Alverson, G Alves, G Anastasoaie, M Ancu, L Andeen, T Anderson, S Andrieu, B Anzelc, MS Amoud, Y Arov, M Arthaud, M Askew, A Asman, B |
| author_sort | Abazov, V |
| collection | OXFORD |
| description | We present the first model-independent measurement of the helicity of W bosons produced in top quark decays, based on a 1fb-1 sample of candidate tt̄ events in the dilepton and lepton plus jets channels collected by the D0 detector at the Fermilab Tevatron pp̄ Collider. We reconstruct the angle θ* between the momenta of the down-type fermion and the top quark in the W boson rest frame for each top quark decay. A fit of the resulting cos θ* distribution finds that the fraction of longitudinal W bosons f0=0.425±0.166(stat)±0.102(syst) and the fraction of right-handed W bosons f+=0.119±0.090(stat)±0.053(syst), which is consistent at the 30% C.L. with the standard model. © 2008 The American Physical Society. |
| first_indexed | 2024-03-06T22:44:06Z |
| format | Journal article |
| id | oxford-uuid:5c9035ce-a7c7-4cde-8f12-40e4d11fc197 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:44:06Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:5c9035ce-a7c7-4cde-8f12-40e4d11fc1972022-03-26T17:29:04ZModel-independent measurement of the W-boson helicity in top-quark decays at D0Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5c9035ce-a7c7-4cde-8f12-40e4d11fc197EnglishSymplectic Elements at Oxford2008Abazov, VAbbott, BAbolins, MAcharya, BAdams, MAdams, TAguilo, EAhn, SAhsan, MAlexeev, GAlkhazov, GAlton, AAlverson, GAlves, GAnastasoaie, MAncu, LAndeen, TAnderson, SAndrieu, BAnzelc, MSAmoud, YArov, MArthaud, MAskew, AAsman, BWe present the first model-independent measurement of the helicity of W bosons produced in top quark decays, based on a 1fb-1 sample of candidate tt̄ events in the dilepton and lepton plus jets channels collected by the D0 detector at the Fermilab Tevatron pp̄ Collider. We reconstruct the angle θ* between the momenta of the down-type fermion and the top quark in the W boson rest frame for each top quark decay. A fit of the resulting cos θ* distribution finds that the fraction of longitudinal W bosons f0=0.425±0.166(stat)±0.102(syst) and the fraction of right-handed W bosons f+=0.119±0.090(stat)±0.053(syst), which is consistent at the 30% C.L. with the standard model. © 2008 The American Physical Society. |
| spellingShingle | Abazov, V Abbott, B Abolins, M Acharya, B Adams, M Adams, T Aguilo, E Ahn, S Ahsan, M Alexeev, G Alkhazov, G Alton, A Alverson, G Alves, G Anastasoaie, M Ancu, L Andeen, T Anderson, S Andrieu, B Anzelc, MS Amoud, Y Arov, M Arthaud, M Askew, A Asman, B Model-independent measurement of the W-boson helicity in top-quark decays at D0 |
| title | Model-independent measurement of the W-boson helicity in top-quark decays at D0 |
| title_full | Model-independent measurement of the W-boson helicity in top-quark decays at D0 |
| title_fullStr | Model-independent measurement of the W-boson helicity in top-quark decays at D0 |
| title_full_unstemmed | Model-independent measurement of the W-boson helicity in top-quark decays at D0 |
| title_short | Model-independent measurement of the W-boson helicity in top-quark decays at D0 |
| title_sort | model independent measurement of the w boson helicity in top quark decays at d0 |
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