Abstract
In theories with a warped extra dimension, composite fermions, as e.g. the right-handed top quark, can be very strongly coupled to Kaluza-Klein (KK) fields. In particular, the KK gluons in the presence of such composite fields become very broad resonances, thus remarkably modifying their experimental signatures. We have computed the pole mass and the pole width of the KK gluon, triggered by its interaction with quarks, as well as the prediction for proton-proton cross-sections using the full propagator and compared it with that obtained from the usual Breit-Wigner approximation. We compare both approaches, along with the existing experimental data from ATLAS and CMS, for the \( t\overline{t} \), \( t\overline{t}W \), \( t\overline{t}Z \), \( t\overline{t}H \), and \( tt\overline{tt} \) channels. We have found differences between the two approaches of up to about 100%, highlighting that the effect of broad resonances can be dramatic on present, and mainly future, experimental searches. The channel \( tt\overline{tt} \) is particularly promising because the size of the cross-section signal is of the same order of magnitude as the Standard Model prediction, and future experimental analyses in this channel, especially for broad resonances, can shed light on the nature of possible physics beyond the Standard Model.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
S. P. Martin, A supersymmetry primer, Adv. Ser. Direct. High Energy Phys. 18 (1998) 1 [Adv. Ser. Direct. High Energy Phys. 21 (2010) 1] [hep-ph/9709356] [INSPIRE].
L. Randall and R. Sundrum, A large mass hierarchy from a small extra dimension, Phys. Rev. Lett. 83 (1999) 3370 [hep-ph/9905221] [INSPIRE].
D. Stancato and J. Terning, The Unhiggs, JHEP 11 (2009) 101 [arXiv:0807.3961] [INSPIRE].
D. Stancato and J. Terning, Constraints on the Unhiggs model from top quark decay, Phys. Rev. D 81 (2010) 115012 [arXiv:1002.1694] [INSPIRE].
A. Falkowski and M. Pérez-Victoria, Holographic Unhiggs, Phys. Rev. D 79 (2009) 035005 [arXiv:0810.4940] [INSPIRE].
J. A. Cabrer, G. von Gersdorff and M. Quirós, Soft-wall stabilization, New J. Phys. 12 (2010) 075012 [arXiv:0907.5361] [INSPIRE].
C. Englert, M. Spannowsky, D. Stancato and J. Terning, Unconstraining the Unhiggs, Phys. Rev. D 85 (2012) 095003 [arXiv:1203.0312] [INSPIRE].
C. Englert, D. G. Netto, M. Spannowsky and J. Terning, Constraining the Unhiggs with LHC data, Phys. Rev. D 86 (2012) 035010 [arXiv:1205.0836] [INSPIRE].
D. Gonçalves, T. Han and S. Mukhopadhyay, Higgs couplings at high scales, Phys. Rev. D 98 (2018) 015023 [arXiv:1803.09751] [INSPIRE].
C. Csáki, G. Lee, S. J. Lee, S. Lombardo and O. Telem, Continuum naturalness, JHEP 03 (2019) 142 [arXiv:1811.06019] [INSPIRE].
S. J. Lee, M. Park and Z. Qian, Probing unitarity violation in the tail of the off-shell Higgs boson in VLVL mode, Phys. Rev. D 100 (2019) 011702 [arXiv:1812.02679] [INSPIRE].
E. Megías and M. Quirós, Gapped continuum Kaluza-Klein spectrum, JHEP 08 (2019) 166 [arXiv:1905.07364] [INSPIRE].
A. Shayegan Shirazi and J. Terning, Quantum critical Higgs: from AdS5 to colliders, JHEP 02 (2020) 026 [arXiv:1908.06186] [INSPIRE].
C. Gao, A. Shayegan Shirazi and J. Terning, Collider phenomenology of a gluino continuum, JHEP 01 (2020) 102 [arXiv:1909.04061] [INSPIRE].
H. Georgi, Unparticle physics, Phys. Rev. Lett. 98 (2007) 221601 [hep-ph/0703260] [INSPIRE].
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].
K. Agashe, A. Belyaev, T. Krupovnickas, G. Perez and J. Virzi, LHC signals from warped extra dimensions, Phys. Rev. D 77 (2008) 015003 [hep-ph/0612015] [INSPIRE].
B. Lillie, L. Randall and L.-T. Wang, The bulk RS KK-gluon at the LHC, JHEP 09 (2007) 074 [hep-ph/0701166] [INSPIRE].
R. Barcelo, A. Carmona, M. Masip and J. Santiago, Gluon excitations in \( t\overline{t} \) production at hadron colliders, Phys. Rev. D 84 (2011) 014024 [arXiv:1105.3333] [INSPIRE].
R. Barcelo, A. Carmona, M. Masip and J. Santiago, Stealth gluons at hadron colliders, Phys. Lett. B 707 (2012) 88 [arXiv:1106.4054] [INSPIRE].
S. Dasgupta, S. K. Rai and T. S. Ray, Impact of a colored vector resonance on the collider constraints for top-like top partner, Phys. Rev. D 102 (2020) 115014 [arXiv:1912.13022] [INSPIRE].
D. Liu, L.-T. Wang and K.-P. Xie, Broad composite resonances and their signals at the LHC, Phys. Rev. D 100 (2019) 075021 [arXiv:1901.01674] [INSPIRE].
S. Jung, D. Lee and K.-P. Xie, Beyond \( {M}_{t\overline{t}} \): learning to search for a broad \( t\overline{t} \) resonance at the LHC, Eur. Phys. J. C 80 (2020) 105 [arXiv:1906.02810] [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, Evidence for \( t\overline{t}t\overline{t} \) production in the multilepton final state in proton-proton collisions at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Eur. Phys. J. C 80 (2020) 1085 [arXiv:2007.14858] [INSPIRE].
CMS collaboration, Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at \( \sqrt{s} \) = 13 TeV, Eur. Phys. J. C 81 (2021) 378 [arXiv:2011.03652] [INSPIRE].
ATLAS collaboration, Analysis of \( t\overline{t}H \) and \( t\overline{t}W \) production in multilepton final states with the ATLAS detector, Tech. Rep. ATLAS-CONF-2019-045, CERN, Geneva, Switzerland (2019).
CMS collaboration, Measurement of top quark pair production in association with a Z boson in proton-proton collisions at \( \sqrt{s} \) = 13 TeV, JHEP 03 (2020) 056 [arXiv:1907.11270] [INSPIRE].
ATLAS collaboration, Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a Z boson at \( \sqrt{s} \) = 13 TeV with the ATLAS detector, Tech. Rep. ATLAS-CONF-2020-028, CERN, Geneva, Switzerland (2020).
W. D. Goldberger and M. B. Wise, Modulus stabilization with bulk fields, Phys. Rev. Lett. 83 (1999) 4922 [hep-ph/9907447] [INSPIRE].
O. DeWolfe, D. Z. Freedman, S. S. Gubser and A. Karch, Modeling the fifth-dimension with scalars and gravity, Phys. Rev. D 62 (2000) 046008 [hep-th/9909134] [INSPIRE].
K. Agashe, A. Delgado, M. J. May and R. Sundrum, RS1, custodial isospin and precision tests, JHEP 08 (2003) 050 [hep-ph/0308036] [INSPIRE].
M. Carena, E. Megías, M. Quíros and C. Wagner, \( {R}_{D^{\left(\ast \right)}} \) in custodial warped space, JHEP 12 (2018) 043 [arXiv:1809.01107] [INSPIRE].
R. Contino, Y. Nomura and A. Pomarol, Higgs as a holographic pseudo-Goldstone boson, Nucl. Phys. B 671 (2003) 148 [hep-ph/0306259] [INSPIRE].
K. Agashe, R. Contino and A. Pomarol, The minimal composite Higgs model, Nucl. Phys. B 719 (2005) 165 [hep-ph/0412089] [INSPIRE].
R. Contino, L. Da Rold and A. Pomarol, Light custodians in natural composite Higgs models, Phys. Rev. D 75 (2007) 055014 [hep-ph/0612048] [INSPIRE].
J. A. Cabrer, G. von Gersdorff and M. Quirós, Warped electroweak breaking without custodial symmetry, Phys. Lett. B 697 (2011) 208 [arXiv:1011.2205] [INSPIRE].
J. A. Cabrer, G. von Gersdorff and M. Quirós, Suppressing electroweak precision observables in 5D warped models, JHEP 05 (2011) 083 [arXiv:1103.1388] [INSPIRE].
J. A. Cabrer, G. von Gersdorff and M. Quirós, Improving naturalness in warped models with a heavy bulk Higgs boson, Phys. Rev. D 84 (2011) 035024 [arXiv:1104.3149] [INSPIRE].
A. Carmona, E. Ponton and J. Santiago, Phenomenology of non-custodial warped models, JHEP 10 (2011) 137 [arXiv:1107.1500] [INSPIRE].
J. A. Cabrer, G. von Gersdorff and M. Quirós, Flavor phenomenology in general 5D warped spaces, JHEP 01 (2012) 033 [arXiv:1110.3324] [INSPIRE].
M. Quirós, Higgs bosons in extra dimensions, Mod. Phys. Lett. A 30 (2015) 1540012 [arXiv:1311.2824] [INSPIRE].
J. de Blas, A. Delgado, B. Ostdiek and A. de la Puente, LHC signals of non-custodial warped 5D models, Phys. Rev. D 86 (2012) 015028 [arXiv:1206.0699] [INSPIRE].
E. Megias, O. Pujolàs and M. Quirós, On dilatons and the LHC diphoton excess, JHEP 05 (2016) 137 [arXiv:1512.06106] [INSPIRE].
E. Megias, G. Panico, O. Pujolàs and M. Quirós, A natural origin for the LHCb anomalies, JHEP 09 (2016) 118 [arXiv:1608.02362] [INSPIRE].
E. Megias, M. Quirós and L. Salas, Lepton-flavor universality violation in RK and \( {R}_{D^{\left(\ast \right)}} \) from warped space, JHEP 07 (2017) 102 [arXiv:1703.06019] [INSPIRE].
A. Falkowski, M. González-Alonso and K. Mimouni, Compilation of low-energy constraints on 4-fermion operators in the SMEFT, JHEP 08 (2017) 123 [arXiv:1706.03783] [INSPIRE].
S. Willenbrock and G. Valencia, On the definition of the Z boson mass, Phys. Lett. B 259 (1991) 373 [INSPIRE].
T. Bhattacharya and S. Willenbrock, Particles near threshold, Phys. Rev. D 47 (1993) 4022 [INSPIRE].
R. Escribano, A. Gallegos, J. L. Lucio M. G. Moreno and J. Pestieau, On the mass, width and coupling constants of the f0(980), Eur. Phys. J. C 28 (2003) 107 [hep-ph/0204338] [INSPIRE].
E. Eichten, I. Hinchliffe, K. D. Lane and C. Quigg, Super collider physics, Rev. Mod. Phys. 56 (1984) 579 [Addendum ibid. 58 (1986) 1065] [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].
R. Frederix, D. Pagani and M. Zaro, Large NLO corrections in \( t\overline{t}{W}^{\pm } \) and \( t\overline{t}t\overline{t} \) hadroproduction from supposedly subleading EW contributions, JHEP 02 (2018) 031 [arXiv:1711.02116] [INSPIRE].
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher’s Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
ArXiv ePrint: 2102.11241
Rights and permissions
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.
About this article
Cite this article
Escribano, R., Mendizabal, M., Quirós, M. et al. On broad Kaluza-Klein gluons. J. High Energ. Phys. 2021, 121 (2021). https://doi.org/10.1007/JHEP05(2021)121
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/JHEP05(2021)121