Abstract
We consider a color octet scalar particle and its exotic decay in the channel gluon-γ using an effective Lagrangian description for its strong and electromagnetic interactions. Such a state is present in many extensions of the Standard Model, and in particular in composite Higgs models with top partial compositeness, where couplings to photons arise via the Wess-Zumino-Witten term. We find that final states with one or two photons allow for a better reach at the LHC, even for small branching ratios. Masses up to 1.2 TeV can be probed at the HL-LHC by use of all final states. Finally, we estimate the sensitivity of the hadronic FCC.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
C.-Y. Chen, A. Freitas, T. Han and K.S.M. Lee, Heavy color-octet particles at the LHC, JHEP 05 (2015) 135 [arXiv:1410.8113] [INSPIRE].
G. Cacciapaglia, H. Cai, A. Deandrea, T. Flacke, S.J. Lee and A. Parolini, Composite scalars at the LHC: the Higgs, the sextet and the octet, JHEP 11 (2015) 201 [arXiv:1507.02283] [INSPIRE].
J. Barnard, T. Gherghetta and T.S. Ray, UV descriptions of composite Higgs models without elementary scalars, JHEP 02 (2014) 002 [arXiv:1311.6562] [INSPIRE].
G. Ferretti and D. Karateev, Fermionic UV completions of composite Higgs models, JHEP 03 (2014) 077 [arXiv:1312.5330] [INSPIRE].
C. Englert, G. Ferretti and M. Spannowsky, Jet-associated resonance spectroscopy, Eur. Phys. J. C 77 (2017) 842 [arXiv:1706.04242] [INSPIRE].
A. Belyaev et al., Di-boson signatures as standard candles for partial compositeness, JHEP 01 (2017) 094 [Erratum ibid. 12 (2017) 088] [arXiv:1610.06591] [INSPIRE].
F. Hayot and O. Napoly, Detecting a heavy colored object at the FNAL Tevatron, Z. Phys. C 7 (1981) 229 [INSPIRE].
A. Belyaev, R. Rosenfeld and A.R. Zerwekh, Tevatron potential for technicolor search with prompt photons, Phys. Lett. B 462 (1999) 150 [hep-ph/9905468] [INSPIRE].
ATLAS collaboration, Analysis of events with b-jets and a pair of leptons of the same charge in pp collisions at \( \sqrt{s} \) = 8 TeV with the ATLAS detector, JHEP 10 (2015) 150 [arXiv:1504.04605] [INSPIRE].
ATLAS collaboration, Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in pp collisions at \( \sqrt{s} \) = 8 TeV with the ATLAS detector, JHEP 08 (2015) 105 [arXiv:1505.04306] [INSPIRE].
CMS collaboration, Search for pair-produced resonances decaying to jet pairs in proton-proton collisions at \( \sqrt{s} \) = 8 TeV, Phys. Lett. B 747 (2015) 98 [arXiv:1412.7706] [INSPIRE].
C. Degrande, B. Fuks, V. Hirschi, J. Proudom and H.-S. Shao, Automated next-to-leading order predictions for new physics at the LHC: the case of colored scalar pair production, Phys. Rev. D 91 (2015) 094005 [arXiv:1412.5589] [INSPIRE].
L. Darmé, B. Fuks and M. Goodsell, Cornering sgluons with four-top-quark events, Phys. Lett. B 784 (2018) 223 [arXiv:1805.10835] [INSPIRE].
CMS collaboration, Search for Standard Model production of four top quarks with same-sign and multilepton final states in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, Eur. Phys. J. C 78 (2018) 140 [arXiv:1710.10614] [INSPIRE].
CMS collaboration, Search for production of four top quarks in final states with same-sign or multiple leptons in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, Eur. Phys. J. C 80 (2020) 75 [arXiv:1908.06463] [INSPIRE].
ATLAS collaboration, Search for pair production of up-type vector-like quarks and for four-top-quark events in final states with multiple b-jets with the ATLAS detector, JHEP 07 (2018) 089 [arXiv:1803.09678] [INSPIRE].
ATLAS collaboration, Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, JHEP 12 (2018) 039 [arXiv:1807.11883] [INSPIRE].
ATLAS collaboration, Search for four-top-quark production in the single-lepton and opposite-sign dilepton final states in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Phys. Rev. D 99 (2019) 052009 [arXiv:1811.02305] [INSPIRE].
CMS collaboration, Search for the production of four top quarks in the single-lepton and opposite-sign dilepton final states in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, JHEP 11 (2019) 082 [arXiv:1906.02805] [INSPIRE].
ATLAS collaboration, A search for pair-produced resonances in four-jet final states at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Eur. Phys. J. C 78 (2018) 250 [arXiv:1710.07171] [INSPIRE].
CMS collaboration, Search for pair-produced resonances decaying to quark pairs in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, Phys. Rev. D 98 (2018) 112014 [arXiv:1808.03124] [INSPIRE].
B. Bhattacherjee, P. Byakti, A. Kushwaha and S.K. Vempati, Unification with vector-like fermions and signals at LHC, JHEP 05 (2018) 090 [arXiv:1702.06417] [INSPIRE].
CMS collaboration, Search for resonant \( t\overline{t} \)production in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, JHEP 04 (2019) 031 [arXiv:1810.05905] [INSPIRE].
ATLAS collaboration, Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton-proton collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Eur. Phys. J. C 78 (2018) 565 [arXiv:1804.10823] [INSPIRE].
ATLAS collaboration, Search for heavy particles decaying into a top-quark pair in the fully hadronic final state in pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Phys. Rev. D 99 (2019) 092004 [arXiv:1902.10077] [INSPIRE].
CMS collaboration, Search for narrow and broad dijet resonances in proton-proton collisions at \( \sqrt{s} \) = 13 TeV and constraints on dark matter mediators and other new particles, JHEP 08 (2018) 130 [arXiv:1806.00843] [INSPIRE].
CMS collaboration, Searches for dijet resonances in pp collisions at \( \sqrt{s} \) = 13 TeV using the 2016 and 2017 datasets, CMS-PAS-EXO-17-026, CERN, Geneva, Switzerland (2017).
ATLAS collaboration, Search for new phenomena in dijet events using 37 fb−1 of pp collision data collected at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Phys. Rev. D 96 (2017) 052004 [arXiv:1703.09127] [INSPIRE].
ATLAS collaboration, Search for low-mass dijet resonances using trigger-level jets with the ATLAS detector in pp collisions at \( \sqrt{s} \) = 13 TeV, Phys. Rev. Lett. 121 (2018) 081801 [arXiv:1804.03496] [INSPIRE].
ATLAS collaboration, Search for new resonances in mass distributions of jet pairs using 139 fb−1 of pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, JHEP 03 (2020) 145 [arXiv:1910.08447] [INSPIRE].
ATLAS collaboration, Search for new phenomena in high-mass final states with a photon and a jet from pp collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Eur. Phys. J. C 78 (2018) 102 [arXiv:1709.10440] [INSPIRE].
CMS collaboration, Search for excited quarks of light and heavy flavor in γ + jet final states in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, Phys. Lett. B 781 (2018) 390 [arXiv:1711.04652] [INSPIRE].
ATLAS collaboration, Search for new phenomena in photon + jet events collected in proton-proton collisions at \( \sqrt{s} \) = 8 TeV with the ATLAS detector, Phys. Lett. B 728 (2014) 562 [arXiv:1309.3230] [INSPIRE].
CMS collaboration, Search for excited quarks in the γ + jet final state in proton-proton collisions at \( \sqrt{s} \) = 8 TeV, Phys. Lett. B 738 (2014) 274 [arXiv:1406.5171] [INSPIRE].
G. Cacciapaglia, A. Deandrea, T. Flacke and A.M. Iyer, Gluon-photon signatures for color octet at the LHC (and beyond), arXiv:2002.01474 [INSPIRE].
N. Bizot, G. Cacciapaglia and T. Flacke, Common exotic decays of top partners, JHEP 06 (2018) 065 [arXiv:1803.00021] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, A brief introduction to PYTHIA 8.1, Comput. Phys. Commun. 178 (2008) 852 [arXiv:0710.3820] [INSPIRE].
DELPHES 3 collaboration, DELPHES 3, a modular framework for fast simulation of a generic collider experiment, JHEP 02 (2014) 057 [arXiv:1307.6346] [INSPIRE].
CMS collaboration, Measurement of triple-differential cross section of gamma + jet production, CMS-PAS-QCD-11-005, CERN, Geneva, Switzerland (2013).
J. Alwall et al., The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations, JHEP 07 (2014) 079 [arXiv:1405.0301] [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 [Erratum ibid. C 73 (2013) 2501] [arXiv:1007.1727] [INSPIRE].
A.V. Manohar and M.B. Wise, Flavor changing neutral currents, an extended scalar sector and the Higgs production rate at the CERN LHC, Phys. Rev. D 74 (2006) 035009 [hep-ph/0606172] [INSPIRE].
J.M. Arnold, M. Pospelov, M. Trott and M.B. Wise, Scalar representations and minimal flavor violation, JHEP 01 (2010) 073 [arXiv:0911.2225] [INSPIRE].
Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited
Author information
Authors and Affiliations
Corresponding author
Additional information
ArXiv ePrint: 2002.01474
Rights and permissions
This article is published under an open access license. Please check the 'Copyright Information' section either on this page or in the PDF for details of this license and what re-use is permitted. If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and re-use information, please contact the Rights and Permissions team.
About this article
Cite this article
Cacciapaglia, G., Deandrea, A., Flacke, T. et al. Gluon-photon signatures for color octet at the LHC (and beyond). J. High Energ. Phys. 2020, 27 (2020). https://doi.org/10.1007/JHEP05(2020)027
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP05(2020)027