$W\gamma$ production and limits on anomalous $WW\gamma$ couplings in $p\bar{p}$ collisions - INSPIRE

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$W\gamma$ production and limits on anomalous $WW\gamma$ couplings in $p\bar{p}$ collisions

D0

Collaboration

Sep, 2011

7 pages

Published in:

Phys.Rev.Lett. 107 (2011) 241803

e-Print:

1109.4432 [hep-ex]

DOI:

10.1103/PhysRevLett.107.241803

PDG:

\kappa _{{{\mathit \gamma}}}

Report number:

FERMILAB-PUB-11-486-E

Experiments:

FNAL-E-0823

View in:

reference search30 citations

Citations per year

Abstract: (arXiv)

We measure the cross section and the difference in rapidities between photons and charged leptons for inclusive W -> lnu+gamma production in egamma and mugamma final states. Using data corresponding to an integrated luminosity of 4.2 fb-1 collected with the D0 detector at the Fermilab Tevatron Collider, the cross section multiplied by the branching fraction for the process ppbar -> Wgamma+X -> lnugamma+X, measured to be 15.8 +/- 0.8 (stat.) +/- 1.2 (syst.) pb, and the distribution of the charge-signed photon-lepton rapidity difference are found to be in agreement with the standard model. These results provide the most stringent limits on anomalous WWgamma couplings for data from hadron colliders: -0.4 < Delta kappa_gamma < 0.4 and -0.08 < lambda_gamma < 0.07 at the 95% C.L.

Note:

7 pages, 4 figures, submitted to PRL

12.15.Ji
12.60.-i
13.85.Qk
anti-p p: interaction
W: hadroproduction
W: leptonic decay
photon: associated production
coupling: (2W photon)
photon lepton: final state
photon: transverse energy

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