Phenomenology of a 750 GeV Singlet

Abstract

We study the recently reported excess in the diphoton resonance search by ATLAS and CMS. We investigate the available parameter space in the combined run-1 and run-2 diphoton data and study its interpretation in terms of a singlet scalar field which possibly mixes with the Standard Model Higgs boson. We show that the mixing angle is already strongly constrained by high-mass Higgs searches in the diboson channel, and by Higgs coupling measurements. While a broad resonance is slightly favored, we argue that the signal is consistent with a narrow-width singlet which couples to colored and electromagnetically-charged vector-like fermions. Dijet signals are predicted and may be visible in upcoming analyses. Allowing for additional decay modes could explain a broader resonance, however, we show that monojet searches disfavor a large invisible width. Finally, we comment on the possible relation of this scenario to the naturalness problem.

arXiv comment21 pages; v2: references added, figures smoothed out, added discussion of Z-gamma and ZZ; v3: replaced to match JHEP 1602 (2016) 152

References in corpus (44)

• A Large Mass Hierarchy from a Small Extra Dimension
• Parton distributions for the LHC
• Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
• Echoes of a Hidden Valley at Hadron Colliders
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• Search for dark matter, extra dimensions, and unparticles in monojet events in proton-proton collisions at sqrt(s) = 8 TeV
• Search for new phenomena in final states with an energetic jet and large missing transverse momentum in pp collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for new phenomena in the dijet mass distribution using $p-p$ collision data at $\sqrt{s}=8$ TeV with the ATLAS detector
• LHC Signals for a SuperUnified Theory of Dark Matter
• What is the gamma gamma resonance at 750 GeV?
• Higgs After the Discovery: A Status Report
• Search for new particles decaying into dijets in proton-antiproton collisions at sqrt(s) = 1.96 TeV
• Search for an additional, heavy Higgs boson in the $H\to ZZ$ decay channel at $\sqrt{s}$ = 8 TeV in $pp$ collision data with the ATLAS detector
• Scenarii for interpretations of the LHC diphoton excess: two Higgs doublets and vector-like quarks and leptons
• Composite Models for the 750 GeV Diphoton Excess
• Interpreting LHC Higgs Results from Natural New Physics Perspective
• LHC probes the hidden sector
• On the Interpretation of a Possible $\sim 750$ GeV Particle Decaying into $\gamma \gamma$
• A second Higgs from the Higgs portal
• Search for narrow resonances decaying to dijets in proton-proton collisions at sqrt(s) = 13 TeV
• Rays of light from the LHC
• Search for New Phenomena in Dijet Mass and Angular Distributions from $pp$ Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector
• The LHC diphoton resonance and dark matter
• The QCD Axion from Aligned Axions and Diphoton Excess
• Di-photon excess illuminates Dark Matter
• Search for diphoton resonances in the mass range from 150 to 850 GeV in pp collisions at sqrt(s) = 8 TeV
• A pseudoscalar decaying to photon pairs in the early LHC Run 2 data
• Footprints of New Strong Dynamics via Anomaly and the 750 GeV Diphoton
• Search for high-mass diphoton resonances in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Singlet Scalar Resonances and the Diphoton Excess
• Diphoton Signatures from Heavy Axion Decays at the CERN Large Hadron Collider
• First interpretation of the 750 GeV di-photon resonance at the LHC
• The 750 GeV diphoton excess from the goldstino superpartner
• Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• A search for pair production of new light bosons decaying into muons
• Search for pair-produced long-lived neutral particles decaying in the ATLAS hadronic calorimeter in $pp$ collisions at $\sqrt{s}$ = 8 TeV
• Constraining extra-fermion(s) from the Higgs boson data
• Stabilizing Electroweak Vacuum in a Vector-like Fermion Model
• Discovering Higgs Decays to Lepton Jets at Hadron Colliders
• A search for prompt lepton-jets in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector
• Search for displaced muonic lepton jets from light Higgs boson decay in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector
• A search for prompt lepton-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Search for WH production with a light Higgs boson decaying to prompt electron-jets in proton-proton collisions at sqrt(s)=7 TeV with the ATLAS detector
• New signals for singlet Higgs and vector-like quarks at the LHC

Cited by in corpus (166)

• Dark Matter through the Higgs portal
• Building and testing models with extended Higgs sectors
• Di-photon excess illuminates Dark Matter
• The diphoton resonance as a gravity mediator of dark matter
• Quark Seesaw, Vectorlike Fermions and Diphoton Excess
• A hidden confining world on the 750 GeV diphoton excess
• The 750 GeV $S$-cion: Where else should we look for it?
• Interpretation of the diphoton excess at CMS and ATLAS
• Higgs singlet boson as a diphoton resonance in a vector-like quark model
• Vector Leptoquarks and the 750 GeV Diphoton Resonance at the LHC
• Implication of the 750 GeV diphoton resonance on two-Higgs-doublet model and its extensions with Higgs field
• 750 GeV Diphotons from a D3-brane
• A resonance without resonance: scrutinizing the diphoton excess at 750 GeV
• A SUSY Inspired Simplified Model for the 750 GeV Diphoton Excess
• On the 750 GeV di-photon excess
• Interpreting the 750 GeV Di-photon Resonance using photon-jets in Hidden-Valley-like models
• Indirect Constraints on the Scalar Di-Photon Resonance at the LHC
• Flavor Anomalies, the Diphoton Excess and a Dark Matter Candidate
• The 750 GeV Diphoton Excess May Not Imply a 750 GeV Resonance
• Asymmetric Dark Matter in the Sun and the Diphoton Excess at the LHC
• 750 GeV Resonance in the Dark Left-Right Model
• Could the width of the diphoton anomaly signal a three-body decay ?
• Symmetries Behind the 750 GeV Diphoton Excess
• Trinification can explain the di-photon and di-boson LHC anomalies
• Scalar Explanation of Diphoton Excess at LHC
• Higgs Stability and the 750 GeV Diphoton Excess
• Effective interpretations of a diphoton excess
• 750 GeV Diphoton Resonance, 125 GeV Higgs and Muon g-2 Anomaly in Deflected Anomaly Mediation SUSY Breaking Scenario
• Radion Candidate for the LHC Diphoton Resonance
• Gluon vs. Photon Production of a 750 GeV Diphoton Resonance
• Running after Diphoton
• Model-independent combination of diphoton constraints at 750 GeV
• Measuring the diphoton coupling of a 750 GeV resonance
• The LHC diphoton resonance from gauge symmetry
• Di-photon Excess Explained by a Resonant Sneutrino in R-parity Violating Supersymmetry
• Electroweak Vacuum Stability and Diphoton Excess at 750 GeV
• Interpreting the 750 GeV diphoton excess in minimal extensions of Two-Higgs-Doublet models
• Goldstones in Diphotons
• Shedding Light on Diphoton Resonances
• Diphoton excess at 750 GeV: Singlet scalars confront triviality
• The 750 GeV diphoton excess and its explanation in 2-Higgs Doublet Models with a real inert scalar multiplet
• A 750 GeV Portal: LHC Phenomenology and Dark Matter Candidates
• The Diphoton Excess, Low Energy Theorem and the 331 Model
• The 750 GeV Diphoton excess in a $U(1)$ hidden symmetry model
• Diphoton resonance at 750 GeV in the broken MRSSM
• LHC diphoton excess from colorful resonances
• 750 GeV Diphoton Resonance from Singlets in an Exceptional Supersymmetric Standard Model
• Implications of the diphoton excess on Left-Right models and gauge unification
• Two Higgs doublets to explain the excesses $pp\to \gamma \gamma (750\mathrm{GeV})$ and $h\to {\tau }^{\pm }{\mu }^{\mp }$
• Perturbativity, vacuum stability and inflation in the light of 750 GeV diphoton excess
• A natural Coleman-Weinberg theory explains the diphoton excess
• The 750 GeV Diphoton Excess as a First Light on Supersymmetry Breaking
• Explanation of $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and muon $g-2$, and implications at the LHC
• The 750 GeV diphoton resonance as a singlet scalar in an extra dimensional model
• LHC 750 GeV Diphoton excess in a radiative seesaw model
• A Loop-philic Pseudoscalar
• The 750 GeV diphoton LHC excess and Extra Z's in Heterotic-String Derived Models
• Digamma, what next?
• Realizing Dark Matter and Higgs Inflation in Light of LHC Diphoton Excess
• Diphoton Excess at 750 GeV in leptophobic U(1)${}^{\prime }$ model inspired by $E_6$ GUT
• 750 GeV Diphoton excess from $E_6$ in F-theory GUTs
• Interpreting the 750 GeV digamma excess: a review
• A Promising Interpretation of Diphoton Resonance at 750 GeV
• Simplified Models for Higgs Physics: Singlet Scalar and Vector-like Quark Phenomenology
• Higgs precision study of the 750 GeV diphoton resonance and the 125 GeV standard model Higgs boson with Higgs-singlet mixing
• Loop Induced Single Top Partner Production and Decay at the LHC
• The NMSSM lives: with the 750 GeV diphoton excess
• Diphoton Excess in Consistent Supersymmetric SU(5) Models with Vector-like Particles
• NMSSM extended with vectorlike particles and the diphoton excess at the LHC
• Vector-Like Exotics in F-Theory and 750 GeV Diphotons
• Di-photon portal to warped gravity
• 750 GeV Resonance in the Gauged $U(1{)}^{\prime }$-Extended MSSM
• Top-phobic heavy Higgs boson as the 750 GeV diphoton resonance
• Future Collider Signatures of the Possible 750 GeV State
• Studying 750 GeV Di-photon Resonance at Photon-Photon Collider
• 750 GeV Di-photon excess at CERN LHC from a dark sector assisted scalar decay
• Interpreting The 750 GeV Diphoton Excess Within Topflavor Seesaw Model
• How Resonance-Continuum Interference Changes 750 GeV Diphoton Excess: Signal Enhancement and Peak Shift
• Left-right asymmetry and 750 GeV diphoton excess
• Confronting a New Three-loop Seesaw Model with the 750 GeV Diphoton Excess
• Diphoton Excess and Running Couplings
• Diphoton excess at 750 GeV and LHC constraints in models with vector-like particles
• One Bump or Two Peaks? The 750 GeV Diphoton Excess and Dark Matter with a Complex Mediator
• Comments on the diphoton excess: critical reappraisal of effective field theory interpretations
• A 96 GeV scalar tagged to dark matter models
• One jet to rule them all: monojet constraints and invisible decays of a 750 GeV diphoton resonance
• Models of LHC Diphoton Excesses Valid up to the Planck scale
• Note on Spin-2 Particle Interpretation of the 750~GeV Diphoton Excess
• An Extended Colored Zee-Babu Model
• A Diphoton Resonance from Bulk RS
• Diphotons from Diaxions
• Heavy Fermion Bound States for Diphoton Excess at 750GeV $\sim$ Collider and Cosmological Constraints $\sim$
• Searching for signatures of $E_6$
• A new scalar resonance at 750 GeV: Towards a proof of concept in favor of strongly interacting theories
• Di-Photon excess in the 2HDM: hasting towards the instability and the non-perturbative regime
• Interpreting 750 GeV Diphoton Excess in Plain NMSSM
• Resonant Diphoton Phenomenology Simplified
• On Electroweak Phase Transition and Di-photon Excess with a 750 GeV Scalar Resonance
• Systematic Study of Diphoton Resonance at 750 GeV from Sgoldstino
• Enlarging the scope of resonant di-Higgs searches: Hunting for Higgs-to-Higgs cascades in $4b$ final states at the LHC and future colliders
• Spotting hidden sectors with Higgs binoculars
• Resonances from QCD bound states and the 750 GeV diphoton excess
• Diphoton resonances in a U(1)_{B-L} extension of the minimal supesymmetric standard model
• The $750$ GeV Diphoton Excesses in a Realistic D-brane Model
• Probing New Physics by the Tail of the Off-shell Higgs in $V_L{V}_L$ Mode
• The 750 GeV diphoton resonance as an sgoldstino: a reappraisal
• A 750 GeV Diphoton Signal from a Very Light Pseudoscalar in the NMSSM
• Diphoton excess at 750 GeV: gluon-gluon fusion or quark-antiquark annihilation?
• The 750GeV diphoton excess: who introduces it?
• A Dark Sector for $g_{\mu }-2$, $R_K$ and a Diphoton Resonance
• Diphotons from an Electroweak Triplet-Singlet
• 750 GeV Diphotons and Supersymmetric Grand Unification
• Exo-Higgs at 750 GeV and Genesis of Baryons
• A Flippon Related Singlet at the LHC II
• 750 GeV Di-photon Excess and Strongly First-Order Electroweak Phase Transition
• Asymmetric Dark Matter Models and the LHC Diphoton Excess
• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy
• Diphotons at the $Z$-pole in Models of the 750 GeV Resonance Decaying to Axion-Like Particles
• Photo-production of a 750 GeV di-photon resonance mediated by Kaluza-Klein leptons in the loop
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Analyzing of singlet fermionic dark matter via the updated direct detection data
• Electroweak Baryogenesis in a Scalar-Assisted Vector-Like Fermion Model
• A closer look to the sgoldstino interpretation of the diphoton excess
• Diphoton excess and VV-scattering
• An SU(6) GUT Origin of the TeV-Scale Vector-like Particles Associated with the 750 GeV Diphoton Resonance
• Signal-background interference for a singlet spin-0 digluon resonance at the LHC
• Model-independent constraints with extended dark matter EFT
• Diphoton resonance confronts dark matter
• Phenomenology of dark matter in chiral U(1)${}_X$ dark sector
• Uncovering the relation of a scalar resonance to the Higgs boson
• Diphoton decay for a 750 GeV scalar boson in a $SU(6)\otimes U(1{)}_X$ model
• Learning from the New Higgs-like Scalar before It Vanishes
• Has a Higgs-flavon with a $750$ GeV mass been detected at the LHC13?
• On a possible large width 750 GeV diphoton resonance at ATLAS and CMS
• Characterising the 750 GeV diphoton excess
• Minimal Dilaton Model and the Diphoton Excess
• From the 750 GeV Diphoton Resonance to Multilepton Excesses
• Diphoton resonance at e+e- and photon colliders
• Precision Drell-Yan Measurements at the LHC and Implications for the Diphoton Excess
• Can the 750 GeV diphoton LHC excess be due to a radion-dominated state?
• Novel kinematics from a custodially protected diphoton resonance
• Higgs mass and unified gauge coupling in the NMSSM with Vector Matter
• A Megaxion at 750 GeV as a First Hint of Low Scale String Theory
• Boosted scalar confronting 750 GeV di-photon excess
• Cornering diphoton resonance models at the LHC
• Astrophysical Constraints on Singlet Scalars at LHC
• Diphoton signal via Chern-Simons interaction in a warped geometry scenario
• The Observed Diphoton Excess in F-theory Inspired Heterotic String-Derived Model
• Phenomenology of an $SU(2{)}_1\times SU(2{)}_2\times U(1{)}_Y$ model at the LHC
• Electroweak and Majorana Sector Higgs Bosons and Pseudo-Nambu-Goldstone Bosons
• Connecting the LHC diphoton excess to the Galatic center gamma-ray excess
• 750 GeV Diphoton Resonance in a Vector-like Extension of Hill Model
• Loop induced singlet scalar production through the vector like top quark at future lepton colliders
• Bounds on supersymmetric effective operators from heavy diphoton searches
• Diphoton Excess through Dark Mediators
• Scrutinizing a di-photon resonance at the LHC through Moscow zero
• The 750 GeV diphoton excess and SUSY
• Quarks and Bosons as Composite Particles
• The 750 GeV LHC diphoton excess from a baryon number conserving string model
• Hadron Correlations at Energies from GeV to TeV
• Implications of perturbative unitarity for scalar di-boson resonance searches at LHC
• Noncommutative approach to disclose a Higgs group
• CP sensitive observables of a hypothetical heavy spin-0 particle with $\gamma \gamma -$interactions dominant
• 750 GeV diphoton excess confronted with a top-pion in the TTM model
• Annihilation of singlet fermionic dark matter into two photons via pseudo-scalar mediator
• Positivity and unitarity constraints on dipole gluon distributions