A strong electroweak phase transition in the 2HDM after LHC8

By G. Dorsch, S. Huber, J. No. 2013

149 citations recorded by the source corpus.

A bstractThe nature of the electroweak phase transition in two-Higgs-doublet models is revisited in light of the recent LHC results. A scan over an extensive region of their parameter space is performed, showing that a strongly first-order phase transition favours a light neutral scalar with SM-like properties, together with a heavy pseudo-scalar ($ {m_{{{A^0}}}} $ ≳ 400 GeV) and a mass hierarchy in the scalar sector, $ {m_{{{H^{\pm }}}}}\lesssim {m_{{{H^0}}}}<{m_{{{A^0}}}} $. We also investigate the h0 → γγ decay channel and find that an enhancement in the branching ratio is allowed, and in some cases even preferred, when a strongly first-order phase transition is required.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2516279ad7781d2ddebbfc0a7c069bf043bcfe49

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In Nuclear and High Energy Physics

Citations in the corpus

Science with the space-based interferometer eLISA. II: gravitational waves from cosmological phase transitions (2015, background): “Moreover, such a decrease in the free energy difference between the origin (in field space) and the vacuum with broken electroweak symmetry is highly correlated with a large mass splitting between the new states A0, H0 [68, 69], which provides an appealing connection to LHC signatures.”
Detecting gravitational waves from cosmological phase transitions with LISA: an update (2019, background): “The strength of the EWPT in the 2HDM and its early Universe implications have been widely studied in the literature [91–102].”
Physics at a 100 TeV pp collider: Higgs and EW symmetry breaking studies (2016, background): “However, it has been found [327,328] that a phenomenological consequence is the existence of the exotic decay channel for the CP-odd neutral scalar: A0 → ZH0.”
Building and testing models with extended Higgs sectors (2017, methodology): “the conclusions they get do not rely on this particular example. A similar conclusion was reached in [480]. Starting from early 1990s, many authors investigated the issue of EWPT within generic 2HDMs [482, 483, 484, 485, 486, 487, 488] and within the Inert doublet model [489, 490, 491, 492, 493, 494”
Higgs Physics at the HL-LHC and HE-LHC (2019, background): “[412, 413] have shown that the strong phase transition would be correlated with the presence of the A ! ZH decay and that a nearly definitive probe of this possibility could be achieved”
Anatomy of the inert two-Higgs-doublet model in the light of the LHC and non-LHC dark matter searches (2016, background): “the possibility within i2HDM that the early Universe, while cooling down, went through a sequence of phase transitions including a strong first-order phase transitions [44, 45, 46, 47, 48, 49, 50].”