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Production of dark matter in association with a Higgs boson via exclusive photon fusion in $pp$ collisions at $\sqrt{s}=13$ TeV

M. A. Arroyo-Ureña, H. Hernández-Arellano, I. Pedraza, S. Rosado-Navarro, T. A. Valencia-Pérez

Abstract

In this work we study the production of a dark matter (DM) particle in association with a Higgs boson via a central exclusive photon-fusion initiated process. We explore this type of production through the Inert Doublet Model plus a complex Singlet (IDMS), where an extension of the Standard Model by an additional $U(1)_X$ gauge symmetry and a $SU(2)$ inert scalar doublet gives rise to a DM candidate $χ$. This particular process involves the collision of two protons exchanging two colorless particles (in our case, photons), from which a central process occurs. Such interaction can be detected in the LHC using forward proton detectors, where the resulting missing mass spectrum can be observed after proton reconstruction, thus allowing a search for physics Beyond the Standard Model (BSM). We present results for different values of the difference of masses of a heavy scalar coming from the complex singlet, the DM candidate and the Higgs boson, $Δ= M_S - M_χ- M_h$, which is the phase space available for the final state in the central exclusive process.

Production of dark matter in association with a Higgs boson via exclusive photon fusion in $pp$ collisions at $\sqrt{s}=13$ TeV

Abstract

In this work we study the production of a dark matter (DM) particle in association with a Higgs boson via a central exclusive photon-fusion initiated process. We explore this type of production through the Inert Doublet Model plus a complex Singlet (IDMS), where an extension of the Standard Model by an additional gauge symmetry and a inert scalar doublet gives rise to a DM candidate . This particular process involves the collision of two protons exchanging two colorless particles (in our case, photons), from which a central process occurs. Such interaction can be detected in the LHC using forward proton detectors, where the resulting missing mass spectrum can be observed after proton reconstruction, thus allowing a search for physics Beyond the Standard Model (BSM). We present results for different values of the difference of masses of a heavy scalar coming from the complex singlet, the DM candidate and the Higgs boson, , which is the phase space available for the final state in the central exclusive process.
Paper Structure (13 sections, 22 equations, 6 figures, 3 tables)

This paper contains 13 sections, 22 equations, 6 figures, 3 tables.

Table of Contents

  1. Introduction
  2. Theoretical framework
  3. Scalar fields
  4. Scalar potential
  5. $Z_2$ symmetry and $x_1=x_2$ case
  6. $U(1)_X$ gauge symmetry, $x_1\neq x_2$ case
  7. Yukawa Lagrangian
  8. Gauge bosons interactions
  9. IDMS parameter space
  10. Collider analysis
  11. Signal cross sections
  12. Comparison with current experimental limits
  13. Conclusions

Figures (6)

  • Figure 1: The value of the relic density ($\Omega_{IDMS} h^{2}$) in relation to the value of the dark matter candidate mass, $M_{\chi}$. The solid circle markers represent the all the different parameter configurations studied, while the diamond markers represent those not excluded by direct detection limits (lux-zeplin).
  • Figure 2: Values of $\lambda_{2x}$ and $v_{x}$ requiring relic density to be below or equal to the PLANCK estimation (solid circles), and with the additional direct detection bound consistency requirement (diamonds).
  • Figure 3: Dark Matter - Nucleon scattering cross section for the chosen parameter space in comparison with the LUX-ZEPLIN limits (lux-zeplin).
  • Figure 4: Feynman diagram of the signal $pp\to p(S\to h\chi)p$.
  • Figure 5: Cross section $\sigma(pp\to p(S\to h\chi)p)$ as a function of the coupling constant $g_Sh\chi$ for $M_S=800,\,1000,\,1200,\,1400,\,1600,\,1800$ and (a) $\Delta=20$ GeV, (b) $\Delta=30$ GeV, (c) $\Delta=40$ GeV, (d) $\Delta=50$ GeV.
  • ...and 1 more figures