Zγ production and limits on anomalous ZZγ and Zγγ couplings in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV
We present a study of eeγ and μμγ events using 1109 (1009) pb-1 of data in the electron (muon) channel, respectively. These data were collected with the DØ detector at the Fermilab Tevatron p over(p, ̄) collider at sqrt(s) = 1.96 TeV. Having observed 453 (515) candidates in the eeγ (μμγ) final sta...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2007
|
| _version_ | 1797079038773166080 |
|---|---|
| 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 Arnoud, Y Arov, M Arthaud, M Askew, A Åsman, 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 Arnoud, Y Arov, M Arthaud, M Askew, A Åsman, B |
| author_sort | Abazov, V |
| collection | OXFORD |
| description | We present a study of eeγ and μμγ events using 1109 (1009) pb-1 of data in the electron (muon) channel, respectively. These data were collected with the DØ detector at the Fermilab Tevatron p over(p, ̄) collider at sqrt(s) = 1.96 TeV. Having observed 453 (515) candidates in the eeγ (μμγ) final state, we measure the Zγ production cross section for a photon with transverse energy ET > 7 GeV, separation between the photon and leptons Δ Rℓ γ > 0.7, and invariant mass of the di-lepton pair Mℓ ℓ > 30 GeV / c2, to be 4.96 ± 0.30 (stat . + syst .) ± 0.30 (lumi .) pb, in agreement with the Standard Model prediction of 4.74 ± 0.22 pb. This is the most precise Zγ cross section measurement at a hadron collider. We set limits on anomalous trilinear Zγγ and ZZγ gauge boson couplings of - 0.085 < h30γ < 0.084, - 0.0053 < h40γ < 0.0054 and - 0.083 < h30Z < 0.082, - 0.0053 < h40Z < 0.0054 at the 95% C.L. for the form-factor scale Λ = 1.2 TeV. |
| first_indexed | 2024-03-07T00:39:56Z |
| format | Journal article |
| id | oxford-uuid:82b3f955-44b4-4d4b-9650-cd233a6f112f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:39:56Z |
| publishDate | 2007 |
| record_format | dspace |
| spelling | oxford-uuid:82b3f955-44b4-4d4b-9650-cd233a6f112f2022-03-26T21:39:17ZZγ production and limits on anomalous ZZγ and Zγγ couplings in p over(p, ̄) collisions at sqrt(s) = 1.96 TeVJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:82b3f955-44b4-4d4b-9650-cd233a6f112fEnglishSymplectic Elements at Oxford2007Abazov, VAbbott, BAbolins, MAcharya, BAdams, MAdams, TAguilo, EAhn, SAhsan, MAlexeev, GAlkhazov, GAlton, AAlverson, GAlves, GAnastasoaie, MAncu, LAndeen, TAnderson, SAndrieu, BAnzelc, MSArnoud, YArov, MArthaud, MAskew, AÅsman, BWe present a study of eeγ and μμγ events using 1109 (1009) pb-1 of data in the electron (muon) channel, respectively. These data were collected with the DØ detector at the Fermilab Tevatron p over(p, ̄) collider at sqrt(s) = 1.96 TeV. Having observed 453 (515) candidates in the eeγ (μμγ) final state, we measure the Zγ production cross section for a photon with transverse energy ET > 7 GeV, separation between the photon and leptons Δ Rℓ γ > 0.7, and invariant mass of the di-lepton pair Mℓ ℓ > 30 GeV / c2, to be 4.96 ± 0.30 (stat . + syst .) ± 0.30 (lumi .) pb, in agreement with the Standard Model prediction of 4.74 ± 0.22 pb. This is the most precise Zγ cross section measurement at a hadron collider. We set limits on anomalous trilinear Zγγ and ZZγ gauge boson couplings of - 0.085 < h30γ < 0.084, - 0.0053 < h40γ < 0.0054 and - 0.083 < h30Z < 0.082, - 0.0053 < h40Z < 0.0054 at the 95% C.L. for the form-factor scale Λ = 1.2 TeV. |
| 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 Arnoud, Y Arov, M Arthaud, M Askew, A Åsman, B Zγ production and limits on anomalous ZZγ and Zγγ couplings in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV |
| title | Zγ production and limits on anomalous ZZγ and Zγγ couplings in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV |
| title_full | Zγ production and limits on anomalous ZZγ and Zγγ couplings in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV |
| title_fullStr | Zγ production and limits on anomalous ZZγ and Zγγ couplings in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV |
| title_full_unstemmed | Zγ production and limits on anomalous ZZγ and Zγγ couplings in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV |
| title_short | Zγ production and limits on anomalous ZZγ and Zγγ couplings in p over(p, ̄) collisions at sqrt(s) = 1.96 TeV |
| title_sort | zγ production and limits on anomalous zzγ and zγγ couplings in p over p ̄ collisions at sqrt s 1 96 tev |
| work_keys_str_mv | AT abazovv zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT abbottb zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT abolinsm zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT acharyab zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT adamsm zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT adamst zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT aguiloe zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT ahns zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT ahsanm zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT alexeevg zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT alkhazovg zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT altona zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT alversong zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT alvesg zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT anastasoaiem zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT ancul zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT andeent zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT andersons zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT andrieub zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT anzelcms zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT arnoudy zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT arovm zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT arthaudm zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT askewa zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev AT asmanb zgproductionandlimitsonanomalouszzgandzngcouplingsinpoverpcollisionsatsqrts196tev |