CP Violation for the Heavens and the Earth
Electroweak baryogenesis can be driven by the top quark in a general two Higgs doublet model with extra Yukawa couplings. Higgs quartics provide the first order phase transition, while extra top Yukawa coupling <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" displ...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/8/4/234 |
| _version_ | 1797409155002138624 |
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| author | George Wei-Shu Hou |
| author_facet | George Wei-Shu Hou |
| author_sort | George Wei-Shu Hou |
| collection | DOAJ |
| description | Electroweak baryogenesis can be driven by the top quark in a general two Higgs doublet model with extra Yukawa couplings. Higgs quartics provide the first order phase transition, while extra top Yukawa coupling <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>ρ</mi><mrow><mi>t</mi><mi>t</mi></mrow></msub></semantics></math></inline-formula> can fuel the cosmic baryon asymmetry through the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>λ</mi><mi>t</mi></msub><mspace width="0.166667em"></mspace><mi>Im</mi><mspace width="0.166667em"></mspace><msub><mi>ρ</mi><mrow><mi>t</mi><mi>t</mi></mrow></msub></mrow></semantics></math></inline-formula> product, with flavor-changing <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>ρ</mi><mrow><mi>t</mi><mi>c</mi></mrow></msub></semantics></math></inline-formula> coupling as backup. The impressive ACME 2018 bound on the electron electric dipole moment calls for an extra electron coupling <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>ρ</mi><mrow><mi>e</mi><mi>e</mi></mrow></msub></semantics></math></inline-formula> for exquisite cancellation among dangerous diagrams, broadening the baryogenesis solution space. The mechanism suggests that extra Yukawa couplings echo the hierarchical structure of standard Yukawa couplings. Phenomenological consequences in the Higgs search and flavor physics are discussed, with <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>μ</mi></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>τ</mi></semantics></math></inline-formula> EDM touched upon. |
| first_indexed | 2024-03-09T04:10:15Z |
| format | Article |
| id | doaj.art-ff5b28ab78ff458a849d0b5de900f613 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T04:10:15Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-ff5b28ab78ff458a849d0b5de900f6132023-12-03T14:02:26ZengMDPI AGUniverse2218-19972022-04-018423410.3390/universe8040234CP Violation for the Heavens and the EarthGeorge Wei-Shu Hou0Department of Physics, National Taiwan University, Taipei 10617, TaiwanElectroweak baryogenesis can be driven by the top quark in a general two Higgs doublet model with extra Yukawa couplings. Higgs quartics provide the first order phase transition, while extra top Yukawa coupling <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>ρ</mi><mrow><mi>t</mi><mi>t</mi></mrow></msub></semantics></math></inline-formula> can fuel the cosmic baryon asymmetry through the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>λ</mi><mi>t</mi></msub><mspace width="0.166667em"></mspace><mi>Im</mi><mspace width="0.166667em"></mspace><msub><mi>ρ</mi><mrow><mi>t</mi><mi>t</mi></mrow></msub></mrow></semantics></math></inline-formula> product, with flavor-changing <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>ρ</mi><mrow><mi>t</mi><mi>c</mi></mrow></msub></semantics></math></inline-formula> coupling as backup. The impressive ACME 2018 bound on the electron electric dipole moment calls for an extra electron coupling <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>ρ</mi><mrow><mi>e</mi><mi>e</mi></mrow></msub></semantics></math></inline-formula> for exquisite cancellation among dangerous diagrams, broadening the baryogenesis solution space. The mechanism suggests that extra Yukawa couplings echo the hierarchical structure of standard Yukawa couplings. Phenomenological consequences in the Higgs search and flavor physics are discussed, with <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>μ</mi></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>τ</mi></semantics></math></inline-formula> EDM touched upon.https://www.mdpi.com/2218-1997/8/4/234baryogenesistop quark2HDMextra Yukawa couplingHiggs quarticsphase transition |
| spellingShingle | George Wei-Shu Hou CP Violation for the Heavens and the Earth Universe baryogenesis top quark 2HDM extra Yukawa coupling Higgs quartics phase transition |
| title | CP Violation for the Heavens and the Earth |
| title_full | CP Violation for the Heavens and the Earth |
| title_fullStr | CP Violation for the Heavens and the Earth |
| title_full_unstemmed | CP Violation for the Heavens and the Earth |
| title_short | CP Violation for the Heavens and the Earth |
| title_sort | cp violation for the heavens and the earth |
| topic | baryogenesis top quark 2HDM extra Yukawa coupling Higgs quartics phase transition |
| url | https://www.mdpi.com/2218-1997/8/4/234 |
| work_keys_str_mv | AT georgeweishuhou cpviolationfortheheavensandtheearth |