Abstract
Motivated by the bulk mixing ξR 5 H † H between a massive radion and a bulk scalar Higgs in warped extra dimensions, we construct an effective four dimensional action that — via the AdS/CF T correspondence — describes the most general mixing between the only light states in the theory, the dilaton and the Higgs. Due to conformal invariance, once the Higgs scalar is localized in the bulk of the extra-dimension the coupling between the dilaton and the Higgs kinetic term vanishes, implying a suppressed coupling between the dilaton and massive gauge bosons. We comment on the implications of the mixing and couplings to Standard Model particles. Identifying the recently discovered 125 GeV resonance with the lightest Higgs-like mixed state ϕ −, we study the phenomenology and constraints for the heaviest radion-like state ϕ +. In particular we find that in the small mixing scenario with a radion-like state ϕ + in the mass range [150, 250] GeV, the diphoton channel can provide the best chance of discovery at the LHC if the collaborations extend their searches into this energy range.
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References
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.B. Kaplan and H. Georgi, SU(2) × U(1) Breaking by Vacuum Misalignment, Phys. Lett. B 136 (1984) 183 [INSPIRE].
H. Georgi and D.B. Kaplan, Composite Higgs and Custodial SU(2), Phys. Lett. B 145 (1984) 216 [INSPIRE].
K. Agashe, R. Contino and A. Pomarol, The minimal composite Higgs model, Nucl. Phys. B 719 (2005) 165 [hep-ph/0412089] [INSPIRE].
A.D. Medina, N.R. Shah and C.E. Wagner, Gauge-Higgs Unification and Radiative Electroweak Symmetry Breaking in Warped Extra Dimensions, Phys. Rev. D 76 (2007) 095010 [arXiv:0706.1281] [INSPIRE].
W.D. Goldberger and M.B. Wise, Modulus stabilization with bulk fields, Phys. Rev. Lett. 83 (1999) 4922 [hep-ph/9907447] [INSPIRE].
R. Rattazzi and A. Zaffaroni, Comments on the holographic picture of the Randall-Sundrum model, JHEP 04 (2001) 021 [hep-th/0012248] [INSPIRE].
W.D. Goldberger, B. Grinstein and W. Skiba, Distinguishing the Higgs boson from the dilaton at the Large Hadron Collider, Phys. Rev. Lett. 100 (2008) 111802 [arXiv:0708.1463] [INSPIRE].
W.D. Goldberger and M.B. Wise, Phenomenology of a stabilized modulus, Phys. Lett. B 475 (2000) 275 [hep-ph/9911457] [INSPIRE].
G.F. Giudice, R. Rattazzi and J.D. Wells, Graviscalars from higher dimensional metrics and curvature Higgs mixing, Nucl. Phys. B 595 (2001) 250 [hep-ph/0002178] [INSPIRE].
C. Csáki, M.L. Graesser and G.D. Kribs, Radion dynamics and electroweak physics, Phys. Rev. D 63 (2001) 065002 [hep-th/0008151] [INSPIRE].
D. Dominici, B. Grzadkowski, J.F. Gunion and M. Toharia, The scalar sector of the Randall-Sundrum model, Nucl. Phys. B 671 (2003) 243 [hep-ph/0206192] [INSPIRE].
J.F. Gunion, M. Toharia and J.D. Wells, Precision electroweak data and the mixed Radion-Higgs sector of warped extra dimensions, Phys. Lett. B 585 (2004) 295 [hep-ph/0311219] [INSPIRE].
Z. Chacko and R.K. Mishra, Effective Theory of a Light Dilaton, Phys. Rev. D 87 (2013) 115006 [arXiv:1209.3022] [INSPIRE].
Z. Chacko, R.K. Mishra and D. Stolarski, Dynamics of a Stabilized Radion and Duality, JHEP 09 (2013) 121 [arXiv:1304.1795] [INSPIRE].
T.G. Rizzo, Radion couplings to bulk fields in the Randall-Sundrum model, JHEP 06 (2002) 056 [hep-ph/0205242] [INSPIRE].
O. DeWolfe, D. Freedman, S. Gubser and A. Karch, Modeling the fifth-dimension with scalars and gravity, Phys. Rev. D 62 (2000) 046008 [hep-th/9909134] [INSPIRE].
N. Desai, U. Maitra and B. Mukhopadhyaya, An updated analysis of radion-Higgs mixing in the light of LHC data, arXiv:1307.3765 [INSPIRE].
H. Kubota and M. Nojiri, Radion-Higgs mixing state at the LHC with the KK contributions to the production and decay, Phys. Rev. D 87 (2013) 076011 [arXiv:1207.0621] [INSPIRE].
H. de Sandes and R. Rosenfeld, Radion-Higgs mixing effects on bounds from LHC Higgs Searches, Phys. Rev. D 85 (2012) 053003 [arXiv:1111.2006] [INSPIRE].
H. Davoudiasl, B. Lillie and T.G. Rizzo, Off-the-wall Higgs in the universal Randall-Sundrum model, JHEP 08 (2006) 042 [hep-ph/0508279] [INSPIRE].
G. Cacciapaglia, C. Csáki, G. Marandella and J. Terning, The Gaugephobic Higgs, JHEP 02 (2007) 036 [hep-ph/0611358] [INSPIRE].
A. Salam and J. Strathdee, Nonlinear realizations. 2. Conformal symmetry, Phys. Rev. 184 (1969) 1760 [INSPIRE].
L. Vecchi, Phenomenology of a light scalar: the dilaton, Phys. Rev. D 82 (2010) 076009 [arXiv:1002.1721] [INSPIRE].
M. Montull, F. Riva, E. Salvioni and R. Torre, Higgs Couplings in Composite Models, Phys. Rev. D 88 (2013) 095006 [arXiv:1308.0559] [INSPIRE].
G. Bhattacharyya and T.S. Ray, Probing warped extra dimension via gg → h and h → γγ at LHC, Phys. Lett. B 675 (2009) 222 [arXiv:0902.1893] [INSPIRE].
A. Azatov, M. Toharia and L. Zhu, Higgs Production from Gluon Fusion in Warped Extra Dimensions, Phys. Rev. D 82 (2010) 056004 [arXiv:1006.5939] [INSPIRE].
F. Goertz, U. Haisch and M. Neubert, Bounds on Warped Extra Dimensions from a Standard Model-like Higgs Boson, Phys. Lett. B 713 (2012) 23 [arXiv:1112.5099] [INSPIRE].
M. Carena, S. Casagrande, F. Goertz, U. Haisch and M. Neubert, Higgs Production in a Warped Extra Dimension, JHEP 08 (2012) 156 [arXiv:1204.0008] [INSPIRE].
C. Csáki, J. Hubisz and S.J. Lee, Radion phenomenology in realistic warped space models, Phys. Rev. D 76 (2007) 125015 [arXiv:0705.3844] [INSPIRE].
A. Djouadi, The anatomy of electro-weak symmetry breaking. I: The Higgs boson in the standard model, Phys. Rept. 457 (2008) 1 [hep-ph/0503172] [INSPIRE].
G. Bélanger, B. Dumont, U. Ellwanger, J. Gunion and S. Kraml, Global fit to Higgs signal strengths and couplings and implications for extended Higgs sectors, Phys. Rev. D 88 (2013) 075008 [arXiv:1306.2941] [INSPIRE].
CMS collaboration, Evidence for a particle decaying to W + W − in the fully leptonic final state in a standard model Higgs boson search in pp collisions at the LHC, CMS-PAS-HIG-13-003 (2013).
CMS collaboration, Properties of the Higgs-like boson in the decay H to ZZ to 4l in pp collisions at \( \sqrt{s} \) = 7 and 8 TeV, CMS-PAS-HIG-13-002 (2013).
ATLAS collaboration, Search for a high-mass Higgs boson in the H → WW → lνlν decay channel with the ATLAS detector using 21 fb −1 of proton-proton collision data, ATLAS-CONF-2013-067 (2013).
CMS collaboration, Searches for new physics using the \( t\overline{t} \) invariant mass distribution in pp collisions at \( \sqrt{s} \) = 8 TeV, Phys. Rev. Lett. 111 (2013) 211804 [arXiv:1309.2030] [INSPIRE].
CMS collaboration, Search for a narrow spin-2 resonance decaying to Z bosons in the semileptonic final state, CMS-PAS-EXO-12-022 (2013).
CMS collaboration, Search for new resonances decaying to WW → \( \ell \nu q\overline{q}\prime \) in the final state with a lepton, missing transverse energy and single reconstructed jet, CMS-PAS-EXO-12-021 (2013).
ATLAS collaboration, Search for Extra Dimensions in diphoton events using proton-proton collisions recorded at \( \sqrt{s} \) = 7 TeV with the ATLAS detector at the LHC, New J. Phys. 15 (2013) 043007 [arXiv:1210.8389] [INSPIRE].
CMS collaboration, Search for Narrow Resonances using the Dijet Mass Spectrum with 19.6 fb −1 of pp Collisions at \( \sqrt{s} \) = 8 TeV, CMS-PAS-EXO-12-059 (2013).
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Cox, P., Medina, A.D., Ray, T.S. et al. Radion/dilaton-Higgs mixing phenomenology in light of the LHC. J. High Energ. Phys. 2014, 32 (2014). https://doi.org/10.1007/JHEP02(2014)032
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DOI: https://doi.org/10.1007/JHEP02(2014)032