2016
DOI: 10.1007/jhep12(2016)106
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Explaining dark matter and B decay anomalies with an L μ − L τ model

Abstract: 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, and the loop-suppressed dark matter-nucleon scattering cross section, and compare our predictions with current and future experimental … Show more

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Cited by 184 publications
(120 citation statements)
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“…Unlike the scalar case, this kind of scenario offers a much richer collider phenomenology since one could assume gauge-like interactions (contrary to Yukawa-like interactions for spin-0 mediators) of the mediator with the SM light quarks and leptons, leading to visible signals, implying stronger constraints [223][224][225][226][227][228][229][230][231][232][233][234][235][236][237][238][239][240][241]. As a consequence we will consider a wider mass range, for both DM and the spin-1 mediator, in our analysis.…”
Section: Vector Dark Mattermentioning
confidence: 99%
“…Unlike the scalar case, this kind of scenario offers a much richer collider phenomenology since one could assume gauge-like interactions (contrary to Yukawa-like interactions for spin-0 mediators) of the mediator with the SM light quarks and leptons, leading to visible signals, implying stronger constraints [223][224][225][226][227][228][229][230][231][232][233][234][235][236][237][238][239][240][241]. As a consequence we will consider a wider mass range, for both DM and the spin-1 mediator, in our analysis.…”
Section: Vector Dark Mattermentioning
confidence: 99%
“…It has been noted, however, that gauging any difference between two lepton family numbers with an Abelian group leads to an anomaly free theory [468,469,469,470]. L µ − L τ is an explicit example which has been investigated in detail in [471][472][473][474][475][476][477][478][479][480][481]. The gauge group …”
Section: Existing Limitsmentioning
confidence: 99%
“…Moreover, recent studies reveal that the gauge boson with an MeV-scale mass, which resolves the discrepancy in muon anomalous magnetic moment, can simultaneously explain either the deficit in the highenergy cosmic neutrino spectrum [23][24][25][26] or the problem of the relic abundance of DM in the scenario with a light weakly interacting massive particle [37][38][39][40]. The L µ − L τ symmetry has been discussed also in the context of the lepton-flavor nonuniversality in B decays [41][42][43], leptonflavor-violating decay of the Higgs boson [42,44], the flavor structure of neutrino mass matrix [40,[45][46][47][48][49], and dark matter phenomenology [38,40,43,49]. 1 In this paper, we propose a test of the models with the U (1) L µ −L τ gauge symmetry which is spontaneously broken below the electroweak scale, by searching for the process e + e − → γ + missing energy at the upcoming Belle-II experiment.…”
Section: Introductionmentioning
confidence: 99%