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TITLE

Inverse seesaw and (g -2) anomalies in B - L extended two Higgs doublet model

KIAS AUTHORS Mondal, Tanmoy
JOURNAL NUCLEAR PHYSICS B, 2022
ARCHIVE  
ABSTRACT We propose a gauged U(1)(B-L) extended two Higgs doublet model to explain both neutrino mass and lepton anomalous magnetic moments (g - 2). Neutrino mass is generated via an inverse seesaw mechanism by introducing singlet fermions. Especially, we update the result of muon (g - 2) in light of the very recent report by E989 experiment at Fermilab, indicating a(mu)(FNAL) = 116592040(54) x 10(-11). Combining BNL result, we have the following deviation from the standard model prediction Aa(mu) = (2.51 +/- 5.9) x 10(-10) at 4.2 sigma. Thanks to an appropriate assignment for U(1)(B-L) x Z(2) symmetry and larger (20 (sic)) tan beta that is favored by type-X model, we realize natural hierarchies among neutral fermions. The lepton anomalous magnetic moments can be induced at the one loop level by introducing an iso-spin singlet singly-charged boson. This charged scalar plays a significant role in evading chiral suppression of these phenomenologies. We show sizable lepton (g - 2) can be obtained after satisfying all the flavor constraints, such as mu -> e gamma and flavor conserving leptonic Z boson decays. (C) 2022 The Author(s). Published by Elsevier B.V.
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