Journal
PHYSICS LETTERS B
Volume 788, Issue -, Pages 519-529Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2018.11.045
Keywords
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Funding
- National Natural Science Foundation of China [11575152, 11675242, 11851303, 11821505]
- Natural Science Foundation of Shandong Province [ZR2017MA004, ZR2017JL002]
- Peng-Huan-Wu Theoretical Physics Innovation Center [11747601]
- CAS Center for Excellence in Particle Physics (CCEPP)
- CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-SYS007]
- Key RAMP
- D Program of Ministry of Science and Technology [2017YFA0402200-04]
- IBS [IBS-R018-D1]
- ARC Centre of Excellence for Particle Physics at the Tera-scale [CE110001004]
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We examine the lepton-specific 2HDM as a solution of muon g - 2 anomaly under various theoretical and experimental constraints, especially the direct search limits from the LHC and the requirement of a strong first-order phase transition in the early universe. We find that the muon g - 2 anomaly can be explained in the region of 32 < tan beta< 80, 10 GeV < m(A) < 65 GeV, 260 GeV < m(H) < 620 GeV and 180 GeV < m(H +/-) < 620 GeV after imposing the joint constraints from the theory, the precision electroweak data, the 125 GeV Higgs data, the leptonic/semi-hadronic tau decays, the leptonic Z decays and Br(B-s -> mu(+)mu(-)). The direct searches from the h -> AA channels can impose stringent upper limits on Br(h -> AA) and the multi-lepton event searches can sizably reduce the allowed region of m(A) and tan beta (10 GeV < m(A) < 44 GeV and 32 < tan beta < 60). Finally, we find that the model can produce a strong first-order phase transition in the region of 14 GeV < m(A) < 25 GeV, 310 GeV < m(H) < 355 GeV and 250 GeV < m(H +/-) < 295 GeV, allowed by the explanation of the muon g - 2 anomaly. (C) 2018 The Authors. Published by Elsevier B.V.
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