Rapidity Correlations in $W\gamma$ Production at Hadron Colliders

Abstract

We study the correlation of photon and charged lepton pseudorapidities, $\eta (\gamma )$ and $\eta (\ell )$, $\ell =e,\mu$, in $p\,\pbar \rightarrow W^\pmγ+X\rightarrow \ell^\pm p\llap/_Tγ+X$. In the Standard Model, the $\Delta \eta (\gamma ,\ell )=\eta (\gamma )-\eta (\ell )$ differential cross section is found to exhibit a pronounced dip at $\Delta \eta (\gamma ,\ell )\approx \mp 0.3$ ($=0$)in $p\bar{p}$ ($pp$) collisions, which originates from the radiation zero present in $q{\bar{q}}^{\prime }\to W\gamma$. The sensitivity of the $\Delta \eta (\gamma ,\ell )$ distribution to higher order QCD corrections, non-standard $WW\gamma$ couplings, the $W+$~jet ``fake'' background and the cuts imposed is explored. At hadron supercolliders, next-to-leading order QCD corrections are found to considerably obscure the radiation zero. The advantages of the $\Delta \eta (\gamma ,\ell )$ distribution over other quantities which are sensitive to the radiation zero are discussed. We conclude that photon lepton rapidity correlations at the Tevatron offer a {\it unique} opportunity to search for the Standard Model radiation zero in hadronic $W\gamma$ production.

33 pages, REVTEX2 file, 12 figures submitted separately as uuencoded tar-ed postscript files

References in corpus (5)

• CTEQ Parton Distributions and Flavor Dependence of Sea Quarks
• Uses and Abuses of Effective Lagrangians
• QCD Corrections to Hadronic $W\gamma$ Production with Non-standard $WW\gamma$ Couplings
• One Loop Effects of Non-Standard Triple Gauge Boson Vertices
• Ratios of $W^{\pm }\gamma$ and $Z\gamma$ Cross Sections: New Tools in Probing the Weak Boson Sector at the Tevatron

Cited by in corpus (19)

• Vector Boson Pair Production in Hadronic Collisions at Order ${\alpha }_s$: Lepton Correlations and Anomalous Couplings
• Electroweak corrections to Wγand Zγproduction at the LHC
• Measurement of the W gamma and Z gamma inclusive cross sections in pp collisions at sqrt(s) = 7 TeV and limits on anomalous triple gauge boson couplings
• NLO QCD and electroweak corrections to $Z+\gamma$ production with leptonic Z-boson decays
• Electroweak-correction effects in gauge-boson pair production at the LHC
• Measurement of W-gamma and Z-gamma production in pp collisions at sqrt(s) = 7 TeV
• First study of the radiation-amplitude zero in Wgamma production and limits on anomalous WWgamma couplings at sqrt(s)=1.96 TeV
• $WZ$ Production at Hadron Colliders: Effects of Non-Standard $WWZ$ Couplings and QCD Corrections
• NLO QCD and electroweak corrections to W+γ production with leptonic W-boson decays
• Wgamma production and limits on anomalous WWgamma couplings in ppbar collisions
• $W\gamma \gamma$ Production at the Fermilab Tevatron Collider: Gauge Invariance and Radiation Amplitude Zero
• ATLAS Violating CP Effectively
• Quark Excitations Through the Prism of Direct Photon Plus Jet at the LHC
• Quartic Gauge Couplings and the Radiation Zero in pp to l nu gamma gamma events at the LHC
• Measurement of W${}^{\pm }\gamma$ differential cross sections in proton-proton collisions at $\sqrt{s}$ = 13 TeV and effective field theory constraints
• The Radiation Valley and Exotic Resonances in $W\gamma$ Production at the LHC
• Weak Boson Production Amplitude Zeros; Equalities of the Helicity Amplitudes
• Zeroing in on Supersymmetric Radiation Amplitude Zeros
• $W\gamma$ and $Z\gamma$ production and limits on anomalous $WW\gamma$, $ZZ\gamma$ and $Z\gamma \gamma$ couplings with D0 detector