14 papers found.

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Stefano Profumo 3 4
**Farinaldo** **S**. **Queiroz** 2
0 Centre de Physique Théorique, Ecole Polytechnique, CNRS, Université Paris-Saclay , 91128 Palaiseau Cedex , France
1 Laboratoire de Physique Théorique, CNRS

Baryon and lepton numbers being accidental global symmetries of the Standard Model (SM), it is natural to promote them to local symmetries. However, to preserve anomaly-freedom, only combinations of B–L are viable. In this spirit, we investigate possible dark matter realizations in the context of the \(U(1)_\mathrm{B{-}L}\) model: (i) Dirac fermion with unbroken B–L; (ii) Dirac...

It was recently pointed out that direct detection signals from at least three different targets may be used to determine whether the Dark Matter (DM) particle is different from its antiparticle. In this work, we examine in detail the feasibility of this test under different conditions, motivated by proposals for future detectors. Specifically, we perform likelihood fits to mock...

We propose several Two Higgs Doublet Models with the addition of an Abelian gauge group which free the usual framework from flavor changing neutral interactions and explain neutrino masses through the seesaw mechanism. We discuss the kinetic and mass-mixing gripping phenomenology which encompass several constraints coming from atomic parity violation, the muon anomalous magnetic...

We present a dark sector model based on gauging the L μ − L τ symmetry that addresses anomalies in b → sμ + μ − decays and that features a particle dark matter candidate. The dark matter particle candidate is a vector-like Dirac fermion coupled to the Z′ gauge boson of the L μ − L τ symmetry. We compute the dark matter thermal relic density, its pair-annihilation cross section...

Dirac fermion dark matter models with heavy Z ′ mediators are subject to stringent constraints from spin-independent direct searches and from LHC bounds, cornering them to live near the Z ′ resonance. Such constraints can be relaxed, however, by turning off the vector coupling to Standard Model fermions, thus weakening direct detection bounds, or by resorting to light Z ′ masses...

We show that the proposed Large Hadron electron Collider (LHeC) will provide an opportunity to search for left-right symmetry and establish lepton number violation, complementing current and planned searches based on LHC data and neutrinoless double beta decay. We consider several plausible configurations for the LHeC — including different electron energies and polarizations, as...

Weakly Interacting Massive Particles (WIMPs) and axions are arguably the most compelling dark matter candidates in the literature. Could they coexist as dark matter particles? More importantly, can they be incorporated in a well motivated framework in agreement with experimental data? In this work, we show that this two component dark matter can be realized in the Inert Doublet...

Stefano Profumo
0
**Farinaldo** **S**. **Queiroz**
0
0
Department of Physics, Santa Cruz Institute for Particle Physics, University of California
, Santa Cruz,
CA 95064, USA
We investigate a so-called 331

We study a number of U(1)X models featuring a Dirac fermion dark matter particle. We perform a comprehensive analysis which includes the study of corrections to the muon magnetic moment, dilepton searches with LHC data, as well as direct and indirect dark matter detection constraints. We consider four different coupling structures, namely U(1) B−L , U(1) d−u , U(1)universal, and...

We perform a detailed study of the dark Z′ portal using a generic parametrization of the Z′-quarks couplings, both for light (8-15) GeV and heavy (100-1000) GeV dark matter scenarios. We present a comprehensive study of the collider phenomenology including jet clustering, hadronization, and detector artifacts, which allows us to derive accurate bounds from the search for new...

We study the muon anomalous magnetic moment \((g-2)_{\mu }\) in the context of the reduced minimal 3-3-1 model recently proposed in the literature. In particular, its spectrum contains a doubly charged scalar (\(H^{\pm \pm }\)) and gauge boson (\(U^{\pm \pm }\)), new singly charged vectors (\(V^{\pm }\)) and a \(Z^{\prime }\) boson, each of which might give a sizeable...

Recent observations suggest that the number of relativistic degrees of freedom in the early universe might exceed what is predicted in the standard cosmological model. If even a small, percent-level fraction of dark matter particles are produced relativistically, they could mimic the effect of an extra realistic species at matter–radiation equality while obeying BBN, CMB and...