Abstract
We study the conditions for a new scalar resonance to be observed first in diphotons at the LHC Run-2. We focus on scenarios where the scalar arises either from an internal or spacetime symmetry broken spontaneously, for which the mass is naturally below the cutoff and the low-energy interactions are fixed by the couplings to the broken currents, UV anomalies, and selection rules. We discuss the recent excess in diphoton resonance searches observed by ATLAS and CMS at 750 GeV, and explore its compatibility with other searches at Run-1 and its interpretation as Goldstone bosons in super-symmetry and composite Higgs models. We show that two candidates naturally emerge: a Goldstone boson from an internal symmetry with electromagnetic anomalies, and the scalar partner of the Goldstone of supersymmetry breaking: the sgoldstino. The dilaton from conformal symmetry breaking is instead disfavoured by present data, in its minimal natural realization.
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J. Olsen and M. Kado, ATLAS and CMS physics results from Run 2, talks given at CERN, December 15 (2015), https://indico.cern.ch/event/442432/.
ATLAS collaboration, Search for resonances decaying to photon pairs in 3.2 fb −1 of pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, ATLAS-CONF-2015-081 (2015).
CMS collaboration, Search for new physics in high mass diphoton events in proton-proton collisions at \( \sqrt{s}=13 \) TeV, CMS-PAS-EXO-15-004 (2015).
A.D. Martin, W.J. Stirling, R.S. Thorne and G. Watt, Parton distributions for the LHC, Eur. Phys. J. C 63 (2009) 189 [arXiv:0901.0002] [INSPIRE].
ATLAS collaboration, Search for high-mass diphoton resonances in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Rev. D 92 (2015) 032004 [arXiv:1504.05511] [INSPIRE].
CMS collaboration, Search for diphoton resonances in the mass range from 150 to 850 GeV in pp collisions at \( \sqrt{s}=8 \) TeV, Phys. Lett. B 750 (2015) 494 [arXiv:1506.02301] [INSPIRE].
ATLAS collaboration, Search for a high-mass Higgs boson decaying to a W boson pair in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, JHEP 01 (2016) 032 [arXiv:1509.00389] [INSPIRE].
CMS collaboration, Search for a Higgs boson in the mass range from 145 to 1000 GeV decaying to a pair of W or Z bosons, JHEP 10 (2015) 144 [arXiv:1504.00936] [INSPIRE].
ATLAS collaboration, Search for an additional, heavy Higgs boson in the H → ZZ decay channel at \( \sqrt{s}=8 \) TeV in pp collision data with the ATLAS detector, Eur. Phys. J. C 76 (2016) 45 [arXiv:1507.05930] [INSPIRE].
ATLAS collaboration, Search for new resonances in W γ and Zγ final states in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Lett. B 738 (2014) 428 [arXiv:1407.8150] [INSPIRE].
ATLAS collaboration, Searches for Higgs boson pair production in the hh → bbτ τ, γγW W ∗ , γγbb, bbbb channels with the ATLAS detector, Phys. Rev. D 92 (2015) 092004 [arXiv:1509.04670] [INSPIRE].
CMS collaboration, Search for resonant pair production of Higgs bosons decaying to two bottom quark-antiquark pairs in proton-proton collisions at 8 TeV, Phys. Lett. B 749 (2015) 560 [arXiv:1503.04114] [INSPIRE].
ATLAS collaboration, A search for \( t\overline{t} \) resonances using lepton-plus-jets events in proton-proton collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, JHEP 08 (2015) 148 [arXiv:1505.07018] [INSPIRE].
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].
ATLAS collaboration, A search for high-mass resonances decaying to τ + τ − in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, JHEP 07 (2015) 157 [arXiv:1502.07177] [INSPIRE].
CMS collaboration, Search for additional neutral Higgs bosons decaying to a pair of tau leptons in pp collisions at \( \sqrt{s}=7 \) and 8 TeV, CMS-PAS-HIG-14-029 (2014).
ATLAS collaboration, Search for high-mass dilepton resonances in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Rev. D 90 (2014) 052005 [arXiv:1405.4123] [INSPIRE].
CMS collaboration, Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at \( \sqrt{s}=8 \) TeV, JHEP 04 (2015) 025 [arXiv:1412.6302] [INSPIRE].
ATLAS collaboration, Search for new phenomena in the dijet mass distribution using pp collision data at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Rev. D 91 (2015) 052007 [arXiv:1407.1376] [INSPIRE].
CMS Collaboration, Search for resonances decaying to dijet final states at \( \sqrt{s}=8 \) TeV with scouting data, CMS-PAS-EXO-14-005 (2014).
B. Gripaios, A. Pomarol, F. Riva and J. Serra, Beyond the minimal composite Higgs model, JHEP 04 (2009) 070 [arXiv:0902.1483] [INSPIRE].
R. Contino, Y. Nomura and A. Pomarol, Higgs as a holographic pseudoGoldstone boson, Nucl. Phys. B 671 (2003) 148 [hep-ph/0306259] [INSPIRE].
M. Schmaltz, The simplest little Higgs, JHEP 08 (2004) 056 [hep-ph/0407143] [INSPIRE].
C.T. Hill and R.J. Hill, Topological physics of little Higgs bosons, Phys. Rev. D 75 (2007) 115009 [hep-ph/0701044] [INSPIRE].
E. Katz, A.E. Nelson and D.G.E. Walker, The intermediate Higgs, JHEP 08 (2005) 074 [hep-ph/0504252] [INSPIRE].
J. Galloway, J.A. Evans, M.A. Luty and R.A. Tacchi, Minimal conformal technicolor and precision electroweak tests, JHEP 10 (2010) 086 [arXiv:1001.1361] [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].
J. Serra, Beyond the minimal top partner decay, JHEP 09 (2015) 176 [arXiv:1506.05110] [INSPIRE].
H. Cai, T. Flacke and M. Lespinasse, A composite scalar hint from di-boson resonances?, arXiv:1512.04508 [INSPIRE].
N. Arkani-Hamed, A.G. Cohen, E. Katz and A.E. Nelson, The littlest Higgs, JHEP 07 (2002) 034 [hep-ph/0206021] [INSPIRE].
L. Vecchi, The natural composite Higgs, arXiv:1304.4579 [INSPIRE].
G. Ferretti, UV completions of partial compositeness: the case for a SU(4) gauge group, JHEP 06 (2014) 142 [arXiv:1404.7137] [INSPIRE].
N. Arkani-Hamed et al., The minimal moose for a little Higgs, JHEP 08 (2002) 021 [hep-ph/0206020] [INSPIRE].
L. Vecchi, A “dangerous irrelevant” UV-completion of the composite Higgs, arXiv:1506.00623 [INSPIRE].
B. Bellazzini, C. Csáki and J. Serra, Composite Higgses, Eur. Phys. J. C 74 (2014) 2766 [arXiv:1401.2457] [INSPIRE].
J. Jaeckel, M. Jankowiak and M. Spannowsky, LHC probes the hidden sector, Phys. Dark Univ. 2 (2013) 111 [arXiv:1212.3620] [INSPIRE].
S. Fichet, G. von Gersdorff and C. Royon, Scattering light by light at 750 GeV at the LHC, arXiv:1512.05751 [INSPIRE].
C. Csáki, J. Hubisz, S. Lombardo and J. Terning, Gluon vs. photon production of a 750 GeV diphoton resonance, arXiv:1601.00638 [INSPIRE].
D.B. Kaplan, Flavor at SSC energies: a new mechanism for dynamically generated fermion masses, Nucl. Phys. B 365 (1991) 259 [INSPIRE].
N. Arkani-Hamed, M. Porrati and L. Randall, Holography and phenomenology, JHEP 08 (2001) 017 [hep-th/0012148] [INSPIRE].
R. Contino and A. Pomarol, Holography for fermions, JHEP 11 (2004) 058 [hep-th/0406257] [INSPIRE].
K. Agashe, R. Contino and A. Pomarol, The minimal composite Higgs model, Nucl. Phys. B 719 (2005) 165 [hep-ph/0412089] [INSPIRE].
G.F. Giudice, C. Grojean, A. Pomarol and R. Rattazzi, The strongly-interacting light Higgs, JHEP 06 (2007) 045 [hep-ph/0703164] [INSPIRE].
I. Low, R. Rattazzi and A. Vichi, Theoretical constraints on the Higgs effective couplings, JHEP 04 (2010) 126 [arXiv:0907.5413] [INSPIRE].
E. Perazzi, G. Ridolfi and F. Zwirner, Signatures of massive sgoldstinos at e + e − colliders, Nucl. Phys. B 574 (2000) 3 [hep-ph/0001025] [INSPIRE].
D.S. Gorbunov and N.V. Krasnikov, Prospects for sgoldstino search at the LHC, JHEP 07 (2002) 043 [hep-ph/0203078] [INSPIRE].
A. Brignole, J.A. Casas, J.R. Espinosa and I. Navarro, Low scale supersymmetry breaking: effective description, electroweak breaking and phenomenology, Nucl. Phys. B 666 (2003) 105 [hep-ph/0301121] [INSPIRE].
C. Petersson and A. Romagnoni, The MSSM Higgs sector with a dynamical goldstino supermultiplet, JHEP 02 (2012) 142 [arXiv:1111.3368] [INSPIRE].
B. Bellazzini, C. Petersson and R. Torre, Photophilic Higgs from sgoldstino mixing, Phys. Rev. D 86 (2012) 033016 [arXiv:1207.0803] [INSPIRE].
E. Dudas, C. Petersson and P. Tziveloglou, Low Scale Supersymmetry Breaking and its LHC Signatures, Nucl. Phys. B 870 (2013) 353 [arXiv:1211.5609] [INSPIRE].
E. Dudas, C. Petersson and R. Torre, Collider signatures of low scale supersymmetry breaking: a Snowmass 2013 white paper, arXiv:1309.1179 [INSPIRE].
C. Petersson and R. Torre, ATLAS diboson excess from low scale supersymmetry breaking, JHEP 01 (2016) 099 [arXiv:1508.05632] [INSPIRE].
P. Fayet, Mixing between gravitational and weak interactions through the massive gravitino, Phys. Lett. B 70 (1977) 461 [INSPIRE].
P. Fayet, Weak interactions of a light gravitino: a lower limit on the gravitino mass from the decay ψ → gravitino anti-photino, Phys. Lett. B 84 (1979) 421 [INSPIRE].
P. Fayet, Scattering cross-sections of the photino and the goldstino (gravitino) on matter, Phys. Lett. B 86 (1979) 272 [INSPIRE].
R. Casalbuoni, S. De Curtis, D. Dominici, F. Feruglio and R. Gatto, A gravitino-goldstino high-energy equivalence theorem, Phys. Lett. B 215 (1988) 313 [INSPIRE].
R. Casalbuoni, S. De Curtis, D. Dominici, F. Feruglio and R. Gatto, High-energy equivalence theorem in spontaneously broken supergravity, Phys. Rev. D 39 (1989) 2281 [INSPIRE].
CMS collaboration, Search for dark matter, extra dimensions and unparticles in monojet events in proton-proton collisions at \( \sqrt{s}=8 \) TeV, Eur. Phys. J. C 75 (2015) 235 [arXiv:1408.3583] [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].
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].
L. Vecchi, Phenomenology of a light scalar: the dilaton, Phys. Rev. D 82 (2010) 076009 [arXiv:1002.1721] [INSPIRE].
V. Barger, M. Ishida and W.-Y. Keung, Dilaton at the LHC, Phys. Rev. D 85 (2012) 015024 [arXiv:1111.2580] [INSPIRE].
Z. Chacko, R. Franceschini and R.K. Mishra, Resonance at 125 GeV: Higgs or dilaton/radion?, JHEP 04 (2013) 015 [arXiv:1209.3259] [INSPIRE].
Z. Chacko and R.K. Mishra, Effective theory of a light dilaton, Phys. Rev. D 87 (2013) 115006 [arXiv:1209.3022] [INSPIRE].
B. Bellazzini, C. Csáki, J. Hubisz, J. Serra and J. Terning, A Higgslike dilaton, Eur. Phys. J. C 73 (2013) 2333 [arXiv:1209.3299] [INSPIRE].
P. Cox, A.D. Medina, T.S. Ray and A. Spray, Radion/dilaton-Higgs mixing phenomenology in light of the LHC, JHEP 02 (2014) 032 [arXiv:1311.3663] [INSPIRE].
Z. Chacko, R.K. Mishra, D. Stolarski and C.B. Verhaaren, Interactions of a stabilized radion and duality, Phys. Rev. D 92 (2015) 056004 [arXiv:1411.3758] [INSPIRE].
R. Rattazzi and A. Zaffaroni, Comments on the holographic picture of the Randall-Sundrum model, JHEP 04 (2001) 021 [hep-th/0012248] [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].
B. Bellazzini, C. Csáki, J. Hubisz, J. Serra and J. Terning, A naturally light dilaton and a small cosmological constant, Eur. Phys. J. C 74 (2014) 2790 [arXiv:1305.3919] [INSPIRE].
F. Coradeschi, P. Lodone, D. Pappadopulo, R. Rattazzi and L. Vitale, A naturally light dilaton, JHEP 11 (2013) 057 [arXiv:1306.4601] [INSPIRE].
E. Megias and O. Pujolàs, Naturally light dilatons from nearly marginal deformations, JHEP 08 (2014) 081 [arXiv:1401.4998] [INSPIRE].
P. Cox and T. Gherghetta, A soft-wall dilaton, JHEP 02 (2015) 006 [arXiv:1411.1732] [INSPIRE].
K.F. Cleary and J. Terning, Marginal breaking of conformal SUSY QCD, arXiv:1510.08065 [INSPIRE].
K. Harigaya and Y. Nomura, Composite models for the 750 GeV diphoton excess, Phys. Lett. B 754 (2016) 151 [arXiv:1512.04850] [INSPIRE].
Y. Mambrini, G. Arcadi and A. Djouadi, The LHC diphoton resonance and dark matter, Phys. Lett. B 755 (2016) 426 [arXiv:1512.04913] [INSPIRE].
M. Backovic, A. Mariotti and D. Redigolo, Di-photon excess illuminates dark matter, JHEP 03 (2016) 157 [arXiv:1512.04917] [INSPIRE].
A. Angelescu, A. Djouadi and G. Moreau, Scenarii for interpretations of the LHC diphoton excess: two Higgs doublets and vector-like quarks and leptons, Phys. Lett. B 756 (2016) 126 [arXiv:1512.04921] [INSPIRE].
Y. Nakai, R. Sato and K. Tobioka, Footprints of new strong dynamics via anomaly, arXiv:1512.04924 [INSPIRE].
S. Knapen, T. Melia, M. Papucci and K. Zurek, Rays of light from the LHC, arXiv:1512.04928 [INSPIRE].
D. Buttazzo, A. Greljo and D. Marzocca, Knocking on new physics’ door with a scalar resonance, Eur. Phys. J. C 76 (2016) 116 [arXiv:1512.04929] [INSPIRE].
A. Pilaftsis, Diphoton signatures from heavy axion decays at the CERN Large Hadron Collider, Phys. Rev. D 93 (2016) 015017 [arXiv:1512.04931] [INSPIRE].
R. Franceschini et al., What is the γγ resonance at 750 GeV?, JHEP 03 (2016) 144 [arXiv:1512.04933] [INSPIRE].
S. Di Chiara, L. Marzola and M. Raidal, First interpretation of the 750 GeV di-photon resonance at the LHC, arXiv:1512.04939 [INSPIRE].
T. Higaki, K.S. Jeong, N. Kitajima and F. Takahashi, The QCD axion from aligned axions and diphoton excess, Phys. Lett. B 755 (2016) 13 [arXiv:1512.05295] [INSPIRE].
S.D. McDermott, P. Meade and H. Ramani, Singlet scalar resonances and the diphoton excess, Phys. Lett. B 755 (2016) 353 [arXiv:1512.05326] [INSPIRE].
J. Ellis, S.A.R. Ellis, J. Quevillon, V. Sanz and T. You, On the interpretation of a possible ∼750 GeV particle decaying into γγ, JHEP 03 (2016) 176 [arXiv:1512.05327] [INSPIRE].
M. Low, A. Tesi and L.-T. Wang, A pseudoscalar decaying to photon pairs in the early LHC Run 2 data, JHEP 03 (2016) 108 [arXiv:1512.05328] [INSPIRE].
B. Bellazzini, R. Franceschini, F. Sala and J. Serra, Goldstones in diphotons, arXiv:1512.05330 [INSPIRE].
R.S. Gupta, S. Jäger, Y. Kats, G. Perez and E. Stamou, Interpreting a 750 GeV diphoton resonance, arXiv:1512.05332 [INSPIRE].
C. Petersson and R. Torre, The 750 GeV diphoton excess from the goldstino superpartner, arXiv:1512.05333 [INSPIRE].
E. Molinaro, F. Sannino and N. Vignaroli, Minimal composite dynamics versus axion origin of the diphoton excess, arXiv:1512.05334 [INSPIRE].
P. Agrawal, J. Fan, B. Heidenreich, M. Reece and M. Strassler, Experimental considerations motivated by the diphoton excess at the LHC, arXiv:1512.05775 [INSPIRE].
A. Ahmed, B.M. Dillon, B. Grzadkowski, J.F. Gunion and Y. Jiang, Higgs-radion interpretation of 750 GeV di-photon excess at the LHC, arXiv:1512.05771 [INSPIRE].
D. Aloni, K. Blum, A. Dery, A. Efrati and Y. Nir, On a possible large width 750 GeV diphoton resonance at ATLAS and CMS, arXiv:1512.05778 [INSPIRE].
Y. Bai, J. Berger and R. Lu, A 750 GeV dark pion: cousin of a dark G-parity-odd WIMP, arXiv:1512.05779 [INSPIRE].
D. Becirevic, E. Bertuzzo, O. Sumensari and R.Z. Funchal, Can the new resonance at LHC be a CP-odd Higgs boson?, arXiv:1512.05623 [INSPIRE].
L. Bian, N. Chen, D. Liu and J. Shu, A hidden confining world on the 750 GeV diphoton excess, arXiv:1512.05759 [INSPIRE].
Q.-H. Cao, Y. Liu, K.-P. Xie, B. Yan and D.-M. Zhang, A boost test of anomalous diphoton resonance at the LHC, arXiv:1512.05542 [INSPIRE].
J. Chakrabortty, A. Choudhury, P. Ghosh, S. Mondal and T. Srivastava, Di-photon resonance around 750 GeV: shedding light on the theory underneath, arXiv:1512.05767 [INSPIRE].
W. Chao, R. Huo and J.-H. Yu, The minimal scalar-stealth top interpretation of the diphoton excess, arXiv:1512.05738 [INSPIRE].
P. Cox, A.D. Medina, T.S. Ray and A. Spray, Diphoton excess at 750 GeV from a radion in the bulk-Higgs scenario, arXiv:1512.05618 [INSPIRE].
C. Csáki, J. Hubisz and J. Terning, Minimal model of a diphoton resonance: Production without gluon couplings, Phys. Rev. D 93 (2016) 035002 [arXiv:1512.05776] [INSPIRE].
D. Curtin and C.B. Verhaaren, Quirky explanations for the diphoton excess, Phys. Rev. D 93 (2016) 055011 [arXiv:1512.05753] [INSPIRE].
S.V. Demidov and D.S. Gorbunov, On sgoldstino interpretation of the diphoton excess, arXiv:1512.05723 [INSPIRE].
B. Dutta, Y. Gao, T. Ghosh, I. Gogoladze and T. Li, Interpretation of the diphoton excess at CMS and ATLAS, Phys. Rev. D 93 (2016) 055032 [arXiv:1512.05439] [INSPIRE].
A. Falkowski, O. Slone and T. Volansky, Phenomenology of a 750 GeV singlet, JHEP 02 (2016) 152 [arXiv:1512.05777] [INSPIRE].
A. Kobakhidze, F. Wang, L. Wu, J.M. Yang and M. Zhang, 750 GeV diphoton resonance in a top and bottom seesaw model, arXiv:1512.05585 [INSPIRE].
R. Martínez, F. Ochoa and C.F. Sierra, Diphoton decay for a 750 GeV scalar boson in an U(1)′ model, arXiv:1512.05617 [INSPIRE].
S. Matsuzaki and K. Yamawaki, 750 GeV diphoton signal from one-family walking technipion, arXiv:1512.05564 [INSPIRE].
J.M. No, V. Sanz and J. Setford, See-saw composite higgses at the LHC: linking naturalness to the 750 GeV di-photon resonance, arXiv:1512.05700 [INSPIRE].
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Bellazzini, B., Franceschini, R., Sala, F. et al. Goldstones in diphotons. J. High Energ. Phys. 2016, 72 (2016). https://doi.org/10.1007/JHEP04(2016)072
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DOI: https://doi.org/10.1007/JHEP04(2016)072