Abstract
We present next-to-leading order predictions for final states containing leptons produced through the decay of a Z boson in association with either a photon and a jet, or a pair of photons. The effect of photon radiation from the final state leptons is included and we also allow for contributions arising from fragmentation processes. Phenomenological studies are presented for the LHC in the case of final states containing charged leptons and in the case of neutrinos. We also use the procedure introduced by Stewart and Tackmann to provide a reliable estimate of the scale uncertainty inherent in our theoretical calculations of jet-binned Zγ cross sections. These computations have been implemented in the public code MCFM.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
J. Ohnemus, Order αs calculations of hadronic W ±γ and Zγ production, Phys. Rev. D 47 (1993) 940 [INSPIRE].
U. Baur, T. Han and J. Ohnemus, QCD corrections and anomalous couplings in Zγ production at hadron colliders, Phys. Rev. D 57 (1998) 2823 [hep-ph/9710416] [INSPIRE].
J.M. Campbell and R.K. Ellis, An update on vector boson pair production at hadron colliders, Phys. Rev. D 60 (1999) 113006 [hep-ph/9905386] [INSPIRE].
D. De Florian and A. Signer, Wγ and Zγ production at hadron colliders, Eur. Phys. J. C 16 (2000) 105 [hep-ph/0002138] [INSPIRE].
J.M. Campbell, R.K. Ellis and C. Williams, Vector boson pair production at the LHC, JHEP 07 (2011) 018 [arXiv:1105.0020] [INSPIRE].
L. Ametller, E. Gava, N. Paver and D. Treleani, Role of the QCD induced gluon-gluon coupling to gauge boson pairs in the multi-TeV region, Phys. Rev. D 32 (1985) 1699 [INSPIRE].
J.J. van der Bij and E.W.N. Glover, Photon Z boson pair production via gluon fusion, Phys. Lett. B 206 (1988) 701 [INSPIRE].
K. Adamson, D. de Florian and A. Signer, Gluon induced contributions to Zγ production at hadron colliders, Phys. Rev. D 67 (2003) 034016 [hep-ph/0211295] [INSPIRE].
W. Hollik and C. Meier, Electroweak corrections to γZ production at hadron colliders, Phys. Lett. B 590 (2004) 69 [hep-ph/0402281] [INSPIRE].
E. Accomando, A. Denner and C. Meier, Electroweak corrections to W γ and Zγ production at the LHC, Eur. Phys. J. C 47 (2006) 125 [hep-ph/0509234] [INSPIRE].
CDF collaboration, T. Aaltonen et al., Limits on anomalous trilinear gauge couplings in Zγ events from pp collisions at \( \sqrt{s}=1.96\,\,TeV \), Phys. Rev. Lett. 107 (2011) 051802 [arXiv:1103.2990] [INSPIRE].
D0 collaboration, V.M. Abazov et al., Zγ production and limits on anomalous ZZγ and Zγγ couplings in pp collisions at \( \sqrt{s}=1.96\,TeV \), Phys. Rev. D 85 (2012) 052001 [arXiv:1111.3684] [INSPIRE].
CMS collaboration, S. Chatrchyan et al., Measurement of W γ and Zγ production in pp collisions at \( \sqrt{s}=7\,TeV \), Phys. Lett. B 701 (2011) 535 [arXiv:1105.2758] [INSPIRE].
ATLAS collaboration, G. Aad et al., Measurement of W γ and Zγ production in proton-proton collisions at \( \sqrt{s}=7\,TeV \) with the ATLAS detector, JHEP 09 (2011) 072 [arXiv:1106.1592] [INSPIRE].
ATLAS collaboration, G. Aad et al., Measurement of W γ and Zγ production cross sections in pp collisions at \( \sqrt{s}=7\,TeV \) and limits on anomalous triple gauge couplings with the ATLAS detector, Phys. Lett. B 717 (2012) 49 [arXiv:1205.2531] [INSPIRE].
S. Catani, L. Cieri, D. de Florian, G. Ferrera and M. Grazzini, Diphoton production at hadron colliders: a fully-differential QCD calculation at NNLO, Phys. Rev. Lett. 108 (2012) 072001 [arXiv:1110.2375] [INSPIRE].
G. Bozzi, F. Campanario, M. Rauch and D. Zeppenfeld, Zγγ production with leptonic decays and triple photon production at NLO QCD, Phys. Rev. D 84 (2011) 074028 [arXiv:1107.3149] [INSPIRE].
F. Campanario, C. Englert, M. Spannowsky and D. Zeppenfeld, NLO-QCD corrections to Wγj production, Europhys. Lett. 88 (2009) 11001 [arXiv:0908.1638] [INSPIRE].
F. Campanario, C. Englert, M. Rauch and D. Zeppenfeld, Precise predictions for Wγγ + jet production at hadron colliders, Phys. Lett. B 704 (2011) 515 [arXiv:1106.4009] [INSPIRE].
P. Agrawal and A. Shivaji, Di-vector boson + jet production via gluon fusion at hadron colliders, Phys. Rev. D 86 (2012) 073013 [arXiv:1207.2927] [INSPIRE].
L.J. Dixon, Calculating scattering amplitudes efficiently, hep-ph/9601359 [INSPIRE].
Z. Bern, L.J. Dixon and D.A. Kosower, One loop amplitudes for e + e − to four partons, Nucl. Phys. B 513 (1998) 3 [hep-ph/9708239] [INSPIRE].
R. Britto, F. Cachazo and B. Feng, Generalized unitarity and one-loop amplitudes in N = 4 super-Yang-Mills, Nucl. Phys. B 725 (2005) 275 [hep-th/0412103] [INSPIRE].
D. Forde, Direct extraction of one-loop integral coefficients, Phys. Rev. D 75 (2007) 125019 [arXiv:0704.1835] [INSPIRE].
P. Mastrolia, Double-cut of scattering amplitudes and Stokes’ theorem, Phys. Lett. B 678 (2009) 246 [arXiv:0905.2909] [INSPIRE].
D. Maˆıtre and P. Mastrolia, S@M, a Mathematica implementation of the spinor-helicity formalism, Comput. Phys. Commun. 179 (2008) 501 [arXiv:0710.5559] [INSPIRE].
G. Bozzi, F. Campanario, M. Rauch and D. Zeppenfeld, W +−γγ production with leptonic decays at NLO QCD, Phys. Rev. D 83 (2011) 114035 [arXiv:1103.4613] [INSPIRE].
S. Frixione, Isolated photons in perturbative QCD, Phys. Lett. B 429 (1998) 369 [hep-ph/9801442] [INSPIRE].
L. Bourhis, M. Fontannaz and J.P. Guillet, Quarks and gluon fragmentation functions into photons, Eur. Phys. J. C 2 (1998) 529 [hep-ph/9704447] [INSPIRE].
A. Gehrmann-De Ridder and E.N. Glover, Final state photon production at LEP, Eur. Phys. J. C 7 (1999) 29 [hep-ph/9806316] [INSPIRE].
J.M. Campbell, R.K. Ellis and C. Williams, MCFM — Monte Carlo for FeMtobarn processes, http://mcfm.fnal.gov/.
S. Catani and M. Seymour, A general algorithm for calculating jet cross-sections in NLO QCD, Nucl. Phys. B 485 (1997) 291 [Erratum ibid. B 510 (1998) 503] [hep-ph/9605323] [INSPIRE].
H.-L. Lai et al., New parton distributions for collider physics, Phys. Rev. D 82 (2010) 074024 [arXiv:1007.2241] [INSPIRE].
I.W. Stewart and F.J. Tackmann, Theory uncertainties for Higgs and other searches using jet bins, Phys. Rev. D 85 (2012) 034011 [arXiv:1107.2117] [INSPIRE].
CMS collaboration, S. Chatrchyan et al., Search for dark matter and large extra dimensions in pp collisions yielding a photon and missing transverse energy, Phys. Rev. Lett. 108 (2012) 261803 [arXiv:1204.0821] [INSPIRE].
Z. Nagy and Z. Trócsányi, Next-to-leading order calculation of four jet observables in electron positron annihilation, Phys. Rev. D 59 (1999) 014020 [Erratum ibid. D 62 (2000) 099902] [hep-ph/9806317] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1208.0566
Rights and permissions
Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
About this article
Cite this article
Campbell, J.M., Hartanto, H.B. & Williams, C. Next-to-leading order predictions for Zγ + jet and Zγγ final states at the LHC. J. High Energ. Phys. 2012, 162 (2012). https://doi.org/10.1007/JHEP11(2012)162
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP11(2012)162