QCD corrections in two-Higgs-doublet extensions of the standard model with minimal flavor violation

Motivated by 3.9σ evidence of a CP-violating phase beyond the standard model in the like-sign dimuon asymmetry reported by DO / , 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, R b , 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.

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“…10 See also [35,36] for recent discussions on R b constraints in models of this form focused on charged scalar exchange.…”

Section: Z → Bb Constraintsmentioning

confidence: 99%

Electroweak baryogenesis in two Higgs doublet models and B meson anomalies

Cline

Kainulainen

Trott

2011

J. High Energ. Phys.

193

216

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“…Since these diagrams are the dominant contributions to this decay, the effects of many new physics (NP) scenarios, either enhancing or suppressing this transition rate by introducing new mediators within the loop, can be constrained by precision measurements of the total b → sγ transition rate [1][2][3][4][5].…”

mentioning

confidence: 99%

Exclusive measurements ofb→sγtransition rate and photon energy spectrum

Lees¹,

Poireau²,

Tisserand³

et al. 2012

Phys. Rev. D

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We use 429 fb −1 of e + e − collision data collected at the Υ (4S) resonance with the BABAR detector to measure the radiative transition rate of b → sγ with a sum of 38 exclusive final states. The inclusive branching fraction with a minimum photon energy of 1.9 GeV is found to be B(B → Xsγ) = (3.29 ± 0.19 ± 0.48) × 10 −4 where the first uncertainty is statistical and the second is systematic. We also measure the first and second moments of the photon energy spectrum and extract the best fit values for the heavy-quark parameters, m b and µ 2 π , in the kinetic and shape function models.

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“…[77], we can obtain the contributions of the charged and neutral Higgses to the tree-level couplingsḡ L b andḡ R b , and the QCD corrections is included, whose expressions are given in ref. [78].…”

Section: Numerical Calculationsmentioning

confidence: 99%

Study of the heavy CP-even Higgs with mass 125 GeV in two-Higgs-doublet models at the LHC and ILC

Wang

Han

2014

J. High Energ. Phys.

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We assume that the 125 GeV Higgs discovered at the LHC is the heavy CP-even Higgs of the two-Higgs-doublet models, and examine the parameter space in the Type-I, Type-II, Lepton-specific and Flipped models allowed by the latest Higgs signal data, the relevant experimental and theoretical constraints. Further, we show the projected limits on tan β, sin(β − α), Hff and HV V couplings from the future measurements of the 125 GeV Higgs at the LHC and ILC, including the LHC with integrated luminosity of 300 fb −1 (LHC-300 fb −1 ) and 3000 fb −1 (LHC-3000 fb −1 ) as well as the ILC at √ s = 250 GeV (ILC-250 GeV), √ s = 500 GeV (ILC-500 GeV) and √ s = 1000 GeV (ILC-1000 GeV). Assuming that the future Higgs signal data have no deviation from the SM expectation, the LHC-300 fb −1 , LHC-3000 fb −1 and ILC-1000 GeV can exclude the wrong-sign Yukawa coupling regions of the Type-II, Flipped and Lepton-specific models at the 2σ level, respectively. The future experiments at the LHC and ILC will constrain the Higgs couplings to be very close to SM values, especially for the HV V coupling.

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QCD corrections in two-Higgs-doublet extensions of the standard model with minimal flavor violation

Cited by 54 publications

References 55 publications

Electroweak baryogenesis in two Higgs doublet models and B meson anomalies

Electroweak baryogenesis in two Higgs doublet models and B meson anomalies

Exclusive measurements ofb→sγtransition rate and photon energy spectrum

Study of the heavy CP-even Higgs with mass 125 GeV in two-Higgs-doublet models at the LHC and ILC

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