Abstract
We consider the production of a single top quark in association with a Higgs boson at the LHC. In particular, we compute the cross sections for the processes pp → thj, thb, thW , thjj, thjb, thW j, thW b in the presence of the anomalous W tb, W W h and tth couplings. We find that the anomalous W tb and tth couplings can enhance the cross sections significantly. We also analyze a few signatures and show that, if these couplings are indeed anomalous, then with enough data, one should be able to observe the production of the Higgs boson in association with single top quark.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
ATLAS collaboration, Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC, Phys. Lett. B 716 (2012) 1 [arXiv:1207.7214] [INSPIRE].
CMS collaboration, Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, Phys. Lett. B 716 (2012) 30 [arXiv:1207.7235] [INSPIRE].
F. Maltoni, K. Paul, T. Stelzer and S. Willenbrock, Associated production of Higgs and single top at hadron colliders, Phys. Rev. D 64 (2001) 094023 [hep-ph/0106293] [INSPIRE].
V. Barger, M. McCaskey and G. Shaughnessy, Single top and Higgs associated production at the LHC, Phys. Rev. D 81 (2010) 034020 [arXiv:0911.1556] [INSPIRE].
S. Biswas, E. Gabrielli and B. Mele, Single top and Higgs associated production as a probe of the Htt coupling sign at the LHC, JHEP 01 (2013) 088 [arXiv:1211.0499] [INSPIRE].
M. Farina, C. Grojean, F. Maltoni, E. Salvioni and A. Thamm, Lifting degeneracies in Higgs couplings using single top production in association with a Higgs boson, JHEP 05 (2013) 022 [arXiv:1211.3736] [INSPIRE].
S. Biswas, E. Gabrielli, F. Margaroli and B. Mele, Direct constraints on the top-Higgs coupling from the 8 TeV LHC data, JHEP 07 (2013) 073 [arXiv:1304.1822] [INSPIRE].
J. Aguilar-Saavedra, A minimal set of top anomalous couplings, Nucl. Phys. B 812 (2009) 181 [arXiv:0811.3842] [INSPIRE].
J. Aguilar-Saavedra, A minimal set of top-Higgs anomalous couplings, Nucl. Phys. B 821 (2009) 215 [arXiv:0904.2387] [INSPIRE].
K. Whisnant, B.-L. Young and X. Zhang, Unitarity and anomalous top quark Yukawa couplings, Phys. Rev. D 52 (1995) 3115 [hep-ph/9410369] [INSPIRE].
K. Hagiwara, S. Ishihara, R. Szalapski and D. Zeppenfeld, Low-energy effects of new interactions in the electroweak boson sector, Phys. Rev. D 48 (1993) 2182 [INSPIRE].
V. Barger, T. Han, P. Langacker, B. McElrath and P. Zerwas, Effects of genuine dimension-six Higgs operators, Phys. Rev. D 67 (2003) 115001 [hep-ph/0301097] [INSPIRE].
J. Aguilar-Saavedra, N. Castro and A. Onofre, Constraints on the Wtb vertex from early LHC data, Phys. Rev. D 83 (2011) 117301 [arXiv:1105.0117] [INSPIRE].
J. Drobnak, S. Fajfer and J.F. Kamenik, New physics in t → bW decay at next-to-leading order in QCD, Phys. Rev. D 82 (2010) 114008 [arXiv:1010.2402] [INSPIRE].
A. Falkowski, F. Riva and A. Urbano, Higgs at last, JHEP 11 (2013) 111 [arXiv:1303.1812] [INSPIRE].
K. Nishiwaki, S. Niyogi and A. Shivaji, ttH Anomalous Coupling in Double Higgs Production, arXiv:1309.6907 [INSPIRE].
B. Zhang, Y.-P. Kuang, H.-J. He and C. Yuan, Testing anomalous gauge couplings of the Higgs boson via weak boson scatterings at the CERN LHC, Phys. Rev. D 67 (2003) 114024 [hep-ph/0303048] [INSPIRE].
N.D. Christensen and C. Duhr, FeynRules — Feynman rules made easy, Comput. Phys. Commun. 180 (2009) 1614 [arXiv:0806.4194] [INSPIRE].
J. Alwall, M. Herquet, F. Maltoni, O. Mattelaer and T. Stelzer, MadGraph 5: Going Beyond, JHEP 06 (2011) 128 [arXiv:1106.0522] [INSPIRE].
J. Pumplin et al., New generation of parton distributions with uncertainties from global QCD analysis, JHEP 07 (2002) 012 [hep-ph/0201195] [INSPIRE].
G. Cowan, K. Cranmer, E. Gross and O. Vitells, Asymptotic formulae for likelihood-based tests of new physics, Eur. Phys. J. C 71 (2011) 1554 [arXiv:1007.1727] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 1211.4362
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
Agrawal, P., Mitra, S. & Shivaji, A. Effect of anomalous couplings on the associated production of a single top quark and a Higgs boson at the LHC. J. High Energ. Phys. 2013, 77 (2013). https://doi.org/10.1007/JHEP12(2013)077
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP12(2013)077