Muon (g − 2) and XENON1T excess with boosted dark matter in Lμ − Lτ model

Borah, Debasish; Dutta, Manoranjan; Mahapatra, Satyabrata; Sahu, Narendra

doi:10.1016/j.physletb.2021.136577

Muon (g − 2) and XENON1T excess with boosted dark matter in Lμ − Lτ model

Apr 12, 2021

9 pages

Published in:

Phys.Lett.B 820 (2021) 136577

Published: Sep 10, 2021

e-Print:

2104.05656 [hep-ph]

DOI:

10.1016/j.physletb.2021.136577 (publication)

View in:

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Abstract: (Elsevier B.V.)

Motivated by the growing evidence for lepton flavour universality violation after the first results from Fermilab's muon

(g - 2)

measurement, we revisit one of the most widely studied anomaly free extensions of the standard model namely, gauged

L_{μ} - L_{τ}

model, known to be providing a natural explanation for muon

(g - 2)

. We also incorporate the presence of dark matter (DM) in this model in order to explain the recently reported electron recoil excess by the XENON1T collaboration. We show that the same neutral gauge boson responsible for generating the required muon

(g - 2)

can also mediate interactions between electron and dark fermions boosted by dark matter annihilation. The required DM annihilation rate into dark fermion require a hybrid setup of thermal and non-thermal mechanisms to generate DM relic density. The tightly constrained parameter space from all requirements remains sensitive to ongoing and near future experiments, keeping the scenario very predictive.

Note:

9 pages, 6 figures, References Added, Accepted for publication in Phys. Lett. B

dark matter: annihilation
dark matter: relic density
lepton: universality: violation
lepton: flavor: universality
universality: violation
flavor: universality
electron: recoil
lepton: flavor
muon: magnetic moment
gauge boson

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