scholarly journals Electric dipole moment constraints on CP-violating heavy-quark Yukawas at next-to-leading order

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Joachim Brod ◽  
Emmanuel Stamou
Keyword(s):  
Electric Dipole ◽  
Anomalous Dimension ◽  
Phenomenological Study ◽  
Dipole Moments ◽  
Charm Quark ◽  
Leading Order ◽  
Logarithmic Order ◽  
Electric Dipole Moments ◽  
Yukawa Couplings ◽  
Experimental Bound

Abstract Electric dipole moments are sensitive probes of new phases in the Higgs Yukawa couplings. We calculate the complete two-loop QCD anomalous dimension matrix for the mixing of CP-odd scalar and tensor operators and apply our results for a phenomenological study of CP violation in the bottom and charm Yukawa couplings. We find large shifts of the induced Wilson coefficients at next-to-leading-logarithmic order. Using the experimental bound on the electric dipole moments of the neutron and mercury, we update the constraints on CP-violating phases in the bottom and charm quark Yukawas.

scholarly journals Electric dipole moments in the extended scotogenic models

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Motoko Fujiwara ◽  
Junji Hisano ◽  
Chihiro Kanai ◽  
Takashi Toma
Keyword(s):  
Parameter Space ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Mass Hierarchy ◽  
Neutrino Mass Hierarchy ◽  
Electric Dipole Moments ◽  
Yukawa Couplings ◽  
Unitarity Bound ◽  
Charged Leptons ◽  
Electron Edm

Abstract Electric dipole moments (EDMs) of charged leptons arise from a new source of CP violation in the lepton sector. In this paper, we calculate the EDMs of the charged leptons in the minimal scotogenic model with two singlet fermions, and the models extended with one or two triplet fermions instead of the singlet fermions, taking into account the constraints of the neutrino oscillation data, the charged lepton flavor violation and perturbative unitarity bound for the Yukawa couplings. We show that the hybrid model with one singlet and one triplet fermions predicts an electron EDM larger than the other models in both normal and inverted neutrino mass hierarchy. We find some parameter space has already been ruled out by the current upper bound of the electron EDM and further parameter space can be explored by future experiments.

scholarly journals ν electroweak baryogenesis

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
E. Fernández-Martínez ◽  
J. López-Pavón ◽  
T. Ota ◽  
S. Rosauro-Alcaraz
Keyword(s):  
Cp Violation ◽  
Parameter Space ◽  
Electric Dipole ◽  
Dipole Moments ◽  
Baryon Asymmetry ◽  
Neutrino Masses ◽  
Electric Dipole Moments ◽  
Yukawa Couplings ◽  
Future Collider ◽  
The Universe

Abstract We investigate if the CP violation necessary for successful electroweak baryo- genesis may be sourced by the neutrino Yukawa couplings. In particular, we consider an electroweak scale Seesaw realization with sizable Yukawas where the new neutrino singlets form (pseudo)-Dirac pairs, as in the linear or inverse Seesaw variants. We find that the baryon asymmetry obtained strongly depends on how the neutrino masses vary within the bubble walls. Moreover, we also find that flavour effects critically impact the final asymmetry obtained and that, taking them into account, the observed value may be obtained in some regions of the parameter space. This source of CP violation naturally avoids the strong constraints from electric dipole moments and links the origin of the baryon asymmetry of the Universe with the mechanism underlying neutrino masses. Interestingly, the mixing of the active and heavy neutrinos needs to be sizable and could be probed at the LHC or future collider experiments.

scholarly journals Studies on the anomalous magnetic and electric dipole moments of the tau-neutrino in pp collisions at the LHC

2019 ◽  
Vol 55 (8) ◽  
Author(s):  
A. Gutiérrez-Rodríguez ◽  
M. Köksal ◽  
A. A. Billur ◽  
M. A. Hernández-Ruíz
Keyword(s):  
Electric Dipole ◽  
Dipole Moments ◽  
Pp Collisions ◽  
Electric Dipole Moments ◽  
Tau Neutrino

scholarly journals Left-right symmetry and electric dipole moments. A global analysis

2021 ◽  
Vol 815 ◽  
pp. 136136
Author(s):  
Michael J. Ramsey-Musolf ◽  
Juan Carlos Vasquez
Keyword(s):  
Electric Dipole ◽  
Dipole Moments ◽  
Global Analysis ◽  
Electric Dipole Moments
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