Electroweak baryogenesis in two Higgs doublet models and B meson anomalies

By J. Cline, K. Kainulainen, Michael Trott. 2011

220 citations recorded by the source corpus.

A bstractMotivated by 3.9σ evidence of a CP-violating phase beyond the standard model in the like-sign dimuon asymmetry reported by D∅, we examine the potential for two Higgs doublet models (2HDMs) to achieve successful electroweak baryogenesis (EWBG) while explaining the dimuon anomaly. Our emphasis is on the minimal flavour violating 2HDM, but our numerical scans of model parameter space include type I and type II models as special cases. We incorporate relevant particle physics constraints, including electroweak precision data, b → sγ, the neutron electric dipole moment, Rb, and perturbative coupling bounds to constrain the model. Surprisingly, we find that a large enough baryon asymmetry is only consistently achieved in a small subset of parameter space in 2HDMs, regardless of trying to simultaneously account for any B physics anomaly. There is some tension between simultaneous explanation of the dimuon anomaly and baryogenesis, but using a Markov chain Monte Carlo we find several models within 1σ of the central values. We point out shortcomings with previous studies that reached different conclusions. The restricted parameter space that allows for EWBG makes this scenario highly predictive for collider searches. We discuss the most promising signatures to pursue at the LHC for EWBG-compatible models.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f3e1b63f44b63c595b1ebc53e9ddaf4c4be66272

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In Artificial Intelligence

1. T. Konstandin
2. S. Huber
3. C. Caprini
4. Igor P. Ivanov
5. J. No
6. G. Servant
7. Marek Lewicki
8. John Ellis

In Nuclear and High Energy Physics

1. T. Konstandin
2. J. No
3. C. Caprini
4. Igor P. Ivanov
5. S. Huber
6. M. Hindmarsh
7. G. Servant
8. G. Nardini

Citations in the corpus

• Theoretical uncertainties for cosmological first-order phase transitions (2020, unknown): “on [28–30], monopoles in the early universe [31], modified couplings in the early universe [32, 33], utilising the QCD transition [34–36] and utilising vector-like fermions [37]. – 2 – from the origin [53, 54]. The Arnold-Espinosa resummation method avoids unphysical linear terms, though by only scre”
• Quantum transport and electroweak baryogenesis (2013, methodology): “ in the limit of very large or very small tanβ. Numerically, the study [57] found that a baryon asymmetry a few times larger than the observed one is possible in this setup. In contrast, the analysis [79] additionally implemented (very strict) constraints on Z→b¯band found generically a smaller bary”
• 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].”
• Building and testing models with extended Higgs sectors (2017, background): “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”