Research output: Contribution to Journal/Magazine › Journal article › peer-review
Z γ production and limits on anomalous Z Z γ and Z γ γ couplings in p<span style='text-decoration: overline'></span>p collisions at √<span style='text-decoration: overline'>s</span> = 1.96- TeV}. / Abazov, V. M.; Bertram, Iain; Borissov, Guennadi et al.
In: Physics Letters B, Vol. 653, No. 5-6, 27.09.2007, p. 378-386.Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Z γ production and limits on anomalous Z Z γ and Z γ γ couplings in pp collisions at √s = 1.96- TeV}.
AU - Abazov, V. M.
AU - Bertram, Iain
AU - Borissov, Guennadi
AU - Fox, Harald
AU - Ratoff, Peter
AU - Sopczak, Andre
PY - 2007/9/27
Y1 - 2007/9/27
N2 - 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 collider at . 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 ΔRℓγ>0.7, and invariant mass of the di-lepton pair Mℓℓ>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 , and , at the 95% C.L. for the form-factor scale Λ=1.2 TeV.
AB - 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 collider at . 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 ΔRℓγ>0.7, and invariant mass of the di-lepton pair Mℓℓ>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 , and , at the 95% C.L. for the form-factor scale Λ=1.2 TeV.
U2 - 10.1016/j.physletb.2007.08.035
DO - 10.1016/j.physletb.2007.08.035
M3 - Journal article
VL - 653
SP - 378
EP - 386
JO - Physics Letters B
JF - Physics Letters B
SN - 0370-2693
IS - 5-6
ER -