CP asymmetry in τ → Kπν τ within non-minimal SU(5)
Abstract Direct CP asymmetry in semi-leptonic τ decays is an intriguing hint for new physics beyond the standard model. We investigate the CP asymmetry in τ − → K S 0 π − ν τ $$ {\tau}^{-}\to {K}_S^0{\pi}^{-}{\nu}_{\tau } $$ and τ − → K − π 0 ν τ decays in the context of the non-minimal SU(5) model,...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-05-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP05(2023)099 |
| _version_ | 1797736458498342912 |
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| author | Gaber Faisel S. Khalil |
| author_facet | Gaber Faisel S. Khalil |
| author_sort | Gaber Faisel |
| collection | DOAJ |
| description | Abstract Direct CP asymmetry in semi-leptonic τ decays is an intriguing hint for new physics beyond the standard model. We investigate the CP asymmetry in τ − → K S 0 π − ν τ $$ {\tau}^{-}\to {K}_S^0{\pi}^{-}{\nu}_{\tau } $$ and τ − → K − π 0 ν τ decays in the context of the non-minimal SU(5) model, with 45-dimensional Higgs multiplet. We show that the associate color-triplet scalar, which is a natural example of a scalar leptoquark, can mediate the τ → s u ¯ ν τ $$ \tau \to s\overline{u}{\nu}_{\tau } $$ transition and account for the observed 2.8 σ discrepancy in A CP τ − → K S 0 π − ν τ $$ {A}_{\textrm{CP}}\left({\tau}^{-}\to {K}_S^0{\pi}^{-}{\nu}_{\tau}\right) $$ compared to the SM expectation. We also predict a sizable A CP(τ − → K − π 0 ν τ ), of O $$ \mathcal{O} $$ (10 −3), which can be experimentally accessible in current and near future experiments. |
| first_indexed | 2024-03-12T13:13:06Z |
| format | Article |
| id | doaj.art-22ad59806038499d8a80f3c429dc325f |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-12T13:13:06Z |
| publishDate | 2023-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-22ad59806038499d8a80f3c429dc325f2023-08-27T11:06:05ZengSpringerOpenJournal of High Energy Physics1029-84792023-05-012023511310.1007/JHEP05(2023)099CP asymmetry in τ → Kπν τ within non-minimal SU(5)Gaber Faisel0S. Khalil1Department of Physics, Faculty of Arts and Sciences, Süleyman Demirel UniversityCenter for Fundamental Physics, Zewail City of Science and TechnologyAbstract Direct CP asymmetry in semi-leptonic τ decays is an intriguing hint for new physics beyond the standard model. We investigate the CP asymmetry in τ − → K S 0 π − ν τ $$ {\tau}^{-}\to {K}_S^0{\pi}^{-}{\nu}_{\tau } $$ and τ − → K − π 0 ν τ decays in the context of the non-minimal SU(5) model, with 45-dimensional Higgs multiplet. We show that the associate color-triplet scalar, which is a natural example of a scalar leptoquark, can mediate the τ → s u ¯ ν τ $$ \tau \to s\overline{u}{\nu}_{\tau } $$ transition and account for the observed 2.8 σ discrepancy in A CP τ − → K S 0 π − ν τ $$ {A}_{\textrm{CP}}\left({\tau}^{-}\to {K}_S^0{\pi}^{-}{\nu}_{\tau}\right) $$ compared to the SM expectation. We also predict a sizable A CP(τ − → K − π 0 ν τ ), of O $$ \mathcal{O} $$ (10 −3), which can be experimentally accessible in current and near future experiments.https://doi.org/10.1007/JHEP05(2023)099Grand UnificationMulti-Higgs ModelsTheories of Flavour |
| spellingShingle | Gaber Faisel S. Khalil CP asymmetry in τ → Kπν τ within non-minimal SU(5) Journal of High Energy Physics Grand Unification Multi-Higgs Models Theories of Flavour |
| title | CP asymmetry in τ → Kπν τ within non-minimal SU(5) |
| title_full | CP asymmetry in τ → Kπν τ within non-minimal SU(5) |
| title_fullStr | CP asymmetry in τ → Kπν τ within non-minimal SU(5) |
| title_full_unstemmed | CP asymmetry in τ → Kπν τ within non-minimal SU(5) |
| title_short | CP asymmetry in τ → Kπν τ within non-minimal SU(5) |
| title_sort | cp asymmetry in τ kπν τ within non minimal su 5 |
| topic | Grand Unification Multi-Higgs Models Theories of Flavour |
| url | https://doi.org/10.1007/JHEP05(2023)099 |
| work_keys_str_mv | AT gaberfaisel cpasymmetryintkpntwithinnonminimalsu5 AT skhalil cpasymmetryintkpntwithinnonminimalsu5 |