Squarkonium, diquarkonium and octetonium at the LHC and their di-photon decays

Abstract

Motivated by the recent di-photon excess by both ATLAS and CMS collaborations at the LHC, we systematically investigate the production and di-photon decay of onia formed by pair of all possible color exotic scalars in minimal extension. When such scalar massive meta-stable colored and charged (MMCC) particles are produced in pair near threshold, $\eta$ onium can be formed and decay into di-photon through annihilation as $pp\to \eta \to \gamma \gamma$. Squarkonium is formed by meta-stable squarks in supersymmetric models such as stoponium. Diquarkonium is formed by meta-stable color sextet diquarks which may be realized in the Pati-Salam model. Octetonium is formed by color octet scalars bosons as in the Manohar-Wise model. Stoponium prediction is much smaller than the required signal to account for the di-photon excess. Due to the enhancement factor from color and electric charge, predictions of diquarkonium and octetonium are of $\mathcal{O}$(10 fb) which are significantly greater than the stoponium prediction. Since the color enhancement also results in large production at the colliders, such light color exotic states of $\mathcal{O}$(375 GeV) suffer from severe direct search constraints. On the other hand, if their dominant decay mode involve top quark, they may be buried in the $t\bar{t}$ plus jets samples and can potentially be searched via $t+j$ resonance.

16 pages, 1 figure, improved version to appear in Phys. Rev. D

References in corpus (18)

• Composite Models for the 750 GeV Diphoton Excess
• Flavor Changing Neutral Currents, an Extended Scalar Sector, and the Higgs Production Rate at the LHC
• Search for narrow resonances decaying to dijets in proton-proton collisions at sqrt(s) = 13 TeV
• Search for New Phenomena in Dijet Mass and Angular Distributions from $pp$ Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector
• Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at sqrt(s) = 8 TeV
• Search for pair-produced resonances decaying to jet pairs in proton-proton collisions at sqrt(s) = 8 TeV
• Di-photon resonance around 750 GeV: shedding light on the theory underneath
• Post--Sphaleron Baryogenesis
• The Minimal Scalar-Stealth Top Interpretation of the Diphoton Excess
• A Boost Test of Anomalous Diphoton Resonance at the LHC
• Searches for heavy long-lived charged particles with the ATLAS detector in proton-proton collisions at $\sqrt{s}$ = 8 TeV
• Search for pair-produced long-lived neutral particles decaying in the ATLAS hadronic calorimeter in $pp$ collisions at $\sqrt{s}$ = 8 TeV
• Color Sextet Scalars at the CERN Large Hadron Collider
• Search for decays of stopped long-lived particles produced in proton-proton collisions at sqrt(s) = 8 TeV
• Diphoton decays of stoponium at the Large Hadron Collider
• Diquark Higgs at LHC
• Pair Production of Color-Octet Scalars at the LHC
• Color Octet Scalar Bound States at the LHC

Cited by in corpus (55)

• Exotic hadrons: review and perspectives
• Quark Seesaw, Vectorlike Fermions and Diphoton Excess
• On the 750 GeV di-photon excess
• Indirect Constraints on the Scalar Di-Photon Resonance at the LHC
• Running after Diphoton
• Measuring the diphoton coupling of a 750 GeV resonance
• Electroweak Vacuum Stability and Diphoton Excess at 750 GeV
• Di-photon Excess Explained by a Resonant Sneutrino in R-parity Violating Supersymmetry
• 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
• 750 GeV Diphoton Resonance from Singlets in an Exceptional Supersymmetric Standard Model
• Perturbativity, vacuum stability and inflation in the light of 750 GeV diphoton excess
• 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 750 GeV dark matter messenger at the Galactic Center
• 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
• Interpreting the 750 GeV digamma excess: a review
• A Promising Interpretation of Diphoton Resonance at 750 GeV
• 750 GeV Diphoton excess from $E_6$ in F-theory GUTs
• Dark sector shining through 750 GeV dark Higgs boson at the LHC
• Higgs precision study of the 750 GeV diphoton resonance and the 125 GeV standard model Higgs boson with Higgs-singlet mixing
• NMSSM extended with vectorlike particles and the diphoton excess at the LHC
• Top-phobic heavy Higgs boson as the 750 GeV diphoton resonance
• 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
• Models of LHC Diphoton Excesses Valid up to the Planck scale
• Threshold enhancement of diphoton resonances
• One Bump or Two Peaks? The 750 GeV Diphoton Excess and Dark Matter with a Complex Mediator
• Note on Spin-2 Particle Interpretation of the 750~GeV Diphoton Excess
• Heavy Fermion Bound States for Diphoton Excess at 750GeV $\sim$ Collider and Cosmological Constraints $\sim$
• Di-Photon excess in the 2HDM: hasting towards the instability and the non-perturbative regime
• The 750GeV diphoton excess: who introduces it?
• Asymmetric Dark Matter Models and the LHC Diphoton Excess
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy
• Learning from the New Higgs-like Scalar before It Vanishes
• Diphoton decay for a 750 GeV scalar boson in a $SU(6)\otimes U(1{)}_X$ model
• Minimal Dilaton Model and the Diphoton Excess
• Resonant Higgs pair production as a probe of stop at the LHC
• Models of 750 GeV quarkonium and the LHC excesses
• Implications of the 750 GeV gamma-gamma Resonance as a Case Study for the International Linear Collider
• Constraints on 750 GeV colorless Q-onia from running couplings
• Connecting the LHC diphoton excess to the Galatic center gamma-ray excess
• Investigation of Mass and Decay Characteristics of the Light-Strange Tetraquark
• The 750 GeV threshold to a new particle world
• 750 GeV Diphoton Resonance in a Vector-like Extension of Hill Model
• Probing a new strongly interacting sector via composite diboson resonances
• 750 GeV diphoton excess confronted with a top-pion in the TTM model