Spin-one dark matter and gamma ray signals from the galactic center

Abstract

In this work we study the possibility that the gamma ray excess (GRE) at the Milky Way galactic center come from the annihilation of dark matter with a (1, 0) ⊕ (0, 1) space-time structure (spin-one dark matter, SODM). We calculate the production of prompt photons from initial state radiation, internal bremsstrahlung, final state radiation including the emission from the decay products of the µ, τ or hadronization of quarks. Next we study the delayed photon emission from the inverse Compton scattering (ICS) of electrons (produced directly or in the prompt decay of µ, τ leptons or in the hadronization of quarks produced in the annihilation of SODM) with the cosmic microwave background or starlight. All these mechanisms yield significant contributions only for Higgs resonant exchange, i.e. for M ≈ M H /2, and the results depend on the Higgs scalar coupling to SODM, g s. The dominant mechanism at the GRE bump is the prompt photon production in the hadronization of b quarks produced inDD →bb, whereas the delayed photon emission from the ICS of electrons coming from the hadronization of b quarks produced in the same reaction dominates at low energies (ω < 0.3 GeV) and prompt photons from c and τ , as well as from internal bremsstrahlung, yield competitive contributions at the end point of the spectrum (ω ≥ 30 GeV). Taking into account all these contributions, our results for photons produced in the annihilation of SODM are in good agreement with the GRE data for g s ∈ [0.98, 1.01]×10 −3 and M ∈ [62.470, 62.505] GeV. We study the consistency of the corresponding results for the dark matter relic density, the spin-independent dark matter-nucleon cross-section σ p and the cross section for the annihilation of dark matter intobb, τ + τ − , µ + µ − and γγ, taking into account the Higgs resonance effects, finding consistent results in all cases.

Space-time origin of gauge symmetry

“…The possibility that dark matter fields transforms in this representation of the HLG and the phenomenology of the leading terms in the corresponding effective theory for their interactions with standard model fields in a hidden scenario can be found in [57,58]. Here we are concerned with the ultraviolet behavior on the view of the canonical dimension one of this field which can be read from equation (110) and in turn yields dimension four for the leading terms of the effective theory [57].…”

“…This includes the equations for the Dirac and Proca representations of the homogeneous Lorentz group transformations important for the standard model, but also reproduces the equation of motion for the (1, 0) ⊕ (0, 1) representation which arises in different contexts of physics beyond the standard model or hadronic physics. It has been pointed out recently that the algebraic structure of this representation has appealing properties for the description of dark matter which motivated the study of the quantum field theory and the phenomenology of the allowed interactions with standard model fields in an effective theory approach [55][56][57][58]. The leading terms in the effective theory for (1, 0) ⊕ (0, 1) dark matter interactions with standard model fields turn out to have canonical dimension four, which opens the door for a renormalizable theory.…”

Higher-spin particles at high-energy colliders

“…[42] has been used in refs. [49,50] to study spin-1 DM. General theoretical limitations on massive higher spin fields based on the analyticity of the S-matrix have been discussed in refs.…”

Latin American Strategy for Research Infrastructures for High Energy, Cosmology, Astroparticle Physics LASF4RI for HECAP

“…The community is ripe to move to the next step of strongly supporting new developments of experimental groups within and beyond the currents efforts. Latin American scientists have played a relevant role in both formulating and studying simplified WIMP-like DM scenarios [2][3][4][5][6][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57], , [79][80][81][82][83][84][85][86][87][88]. At the same time, in many theoretical studies across high energy physics, astrophysics and cosmology Latin American communities have been dedicated to explore DM solutions based on axions, ALPs , dark photon particles [89][90][91][92][93], and more general ULDM [94][95][96][97][98], including a recent review [99].…”