Details
| Original language | English |
|---|---|
| Article number | 56 |
| Journal | Journal of high energy physics |
| Volume | 2020 |
| Issue number | 5 |
| Publication status | Published - May 2020 |
| Externally published | Yes |
Abstract
We explore the implications of the Standard Model effective field theory (SMEFT) with dimension-six terms involving the Higgs boson and third-generation fermion fields on the rate of Higgs boson production and decay into fermions, on the electric dipole moments (EDMs) of the electron, and on the baryon asymmetry of the Universe. We study the consequences of allowing these additional terms for each flavor separately and for combinations of two flavors. We find that a complex τ Yukawa coupling can account for the observed baryon asymmetry YBobs within current LHC and EDM bounds. A complex b (t) Yukawa coupling can account for 4% (2%) of YBobs, whereas a combination of the two can reach 12%. Combining τ with either t or b enlarges the viable parameter space owing to cancellations in the EDM and in either Higgs production times decay or the total Higgs width, respectively. Interestingly, in such a scenario there exists a region in parameter space where the SMEFT contributions to the electron EDM cancel and collider signal strengths are precisely SM-like, while producing sufficient baryon asymmetry. Measuring C P violation in Higgs decays to τ leptons is the smoking gun for this scenario.
Keywords
- CP violation, Cosmology of Theories beyond the SM, Higgs Physics
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
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In: Journal of high energy physics, Vol. 2020, No. 5, 56, 05.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - C P violation from τ , t and b dimension-6 Yukawa couplings — interplay of baryogenesis, EDM and Higgs physics
AU - Fuchs, Elina
N1 - Publisher Copyright: © 2020, The Author(s).
PY - 2020/5
Y1 - 2020/5
N2 - We explore the implications of the Standard Model effective field theory (SMEFT) with dimension-six terms involving the Higgs boson and third-generation fermion fields on the rate of Higgs boson production and decay into fermions, on the electric dipole moments (EDMs) of the electron, and on the baryon asymmetry of the Universe. We study the consequences of allowing these additional terms for each flavor separately and for combinations of two flavors. We find that a complex τ Yukawa coupling can account for the observed baryon asymmetry YBobs within current LHC and EDM bounds. A complex b (t) Yukawa coupling can account for 4% (2%) of YBobs, whereas a combination of the two can reach 12%. Combining τ with either t or b enlarges the viable parameter space owing to cancellations in the EDM and in either Higgs production times decay or the total Higgs width, respectively. Interestingly, in such a scenario there exists a region in parameter space where the SMEFT contributions to the electron EDM cancel and collider signal strengths are precisely SM-like, while producing sufficient baryon asymmetry. Measuring C P violation in Higgs decays to τ leptons is the smoking gun for this scenario.
AB - We explore the implications of the Standard Model effective field theory (SMEFT) with dimension-six terms involving the Higgs boson and third-generation fermion fields on the rate of Higgs boson production and decay into fermions, on the electric dipole moments (EDMs) of the electron, and on the baryon asymmetry of the Universe. We study the consequences of allowing these additional terms for each flavor separately and for combinations of two flavors. We find that a complex τ Yukawa coupling can account for the observed baryon asymmetry YBobs within current LHC and EDM bounds. A complex b (t) Yukawa coupling can account for 4% (2%) of YBobs, whereas a combination of the two can reach 12%. Combining τ with either t or b enlarges the viable parameter space owing to cancellations in the EDM and in either Higgs production times decay or the total Higgs width, respectively. Interestingly, in such a scenario there exists a region in parameter space where the SMEFT contributions to the electron EDM cancel and collider signal strengths are precisely SM-like, while producing sufficient baryon asymmetry. Measuring C P violation in Higgs decays to τ leptons is the smoking gun for this scenario.
KW - CP violation
KW - Cosmology of Theories beyond the SM
KW - Higgs Physics
UR - http://www.scopus.com/inward/record.url?scp=85084488344&partnerID=8YFLogxK
U2 - 10.1007/JHEP05(2020)056
DO - 10.1007/JHEP05(2020)056
M3 - Article
VL - 2020
JO - Journal of high energy physics
JF - Journal of high energy physics
SN - 1029-8479
IS - 5
M1 - 56
ER -