Uniting low-energy semileptonic and hadronic anomalies within SMEFT
Abstract Two categories of four-fermion SMEFT operators are semileptonic (two quarks and two leptons) and hadronic (four quarks). At tree level, an operator of a given category contributes only to processes of the same category. However, when the SMEFT Hamiltonian is evolved down from the new-physic...
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2024-12-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP12(2024)175 |
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| author | Alakabha Datta Jacky Kumar Suman Kumbhakar David London |
| author_facet | Alakabha Datta Jacky Kumar Suman Kumbhakar David London |
| author_sort | Alakabha Datta |
| collection | DOAJ |
| description | Abstract Two categories of four-fermion SMEFT operators are semileptonic (two quarks and two leptons) and hadronic (four quarks). At tree level, an operator of a given category contributes only to processes of the same category. However, when the SMEFT Hamiltonian is evolved down from the new-physics scale to low energies using the renormalization-group equations (RGEs), due to operator mixing this same SMEFT operator can generate operators of the other category at one loop. Thus, to search for a SMEFT explanation of a low-energy anomaly, or combination of anomalies, one must: (i) identify the candidate semileptonic and hadronic SMEFT operators, (ii) run them down to low energy with the RGEs, (iii) generate the required low-energy operators with the correct Wilson coefficients, and (iv) check that all other constraints are satisfied. In this paper, we illustrate this method by finding all SMEFT operators that, by themselves, provide a combined explanation of the (semileptonic) b ¯ → s ¯ ℓ + ℓ − $$ \overline{b}\to \overline{s}{\ell}^{+}{\ell}^{-} $$ anomalies and the (hadronic) B → πK puzzle. |
| format | Article |
| id | doaj-art-56ba40a7d06d472d9bbedacd36e652d2 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-56ba40a7d06d472d9bbedacd36e652d22025-01-05T12:06:48ZengSpringerOpenJournal of High Energy Physics1029-84792024-12-0120241212710.1007/JHEP12(2024)175Uniting low-energy semileptonic and hadronic anomalies within SMEFTAlakabha Datta0Jacky Kumar1Suman Kumbhakar2David London3Department of Physics and Astronomy, University of MississippiTheoretical Division, Los Alamos National LaboratoryPhysique des Particules, Université de MontréalPhysique des Particules, Université de MontréalAbstract Two categories of four-fermion SMEFT operators are semileptonic (two quarks and two leptons) and hadronic (four quarks). At tree level, an operator of a given category contributes only to processes of the same category. However, when the SMEFT Hamiltonian is evolved down from the new-physics scale to low energies using the renormalization-group equations (RGEs), due to operator mixing this same SMEFT operator can generate operators of the other category at one loop. Thus, to search for a SMEFT explanation of a low-energy anomaly, or combination of anomalies, one must: (i) identify the candidate semileptonic and hadronic SMEFT operators, (ii) run them down to low energy with the RGEs, (iii) generate the required low-energy operators with the correct Wilson coefficients, and (iv) check that all other constraints are satisfied. In this paper, we illustrate this method by finding all SMEFT operators that, by themselves, provide a combined explanation of the (semileptonic) b ¯ → s ¯ ℓ + ℓ − $$ \overline{b}\to \overline{s}{\ell}^{+}{\ell}^{-} $$ anomalies and the (hadronic) B → πK puzzle.https://doi.org/10.1007/JHEP12(2024)175Rare DecaysSemi-Leptonic DecaysSMEFT |
| spellingShingle | Alakabha Datta Jacky Kumar Suman Kumbhakar David London Uniting low-energy semileptonic and hadronic anomalies within SMEFT Journal of High Energy Physics Rare Decays Semi-Leptonic Decays SMEFT |
| title | Uniting low-energy semileptonic and hadronic anomalies within SMEFT |
| title_full | Uniting low-energy semileptonic and hadronic anomalies within SMEFT |
| title_fullStr | Uniting low-energy semileptonic and hadronic anomalies within SMEFT |
| title_full_unstemmed | Uniting low-energy semileptonic and hadronic anomalies within SMEFT |
| title_short | Uniting low-energy semileptonic and hadronic anomalies within SMEFT |
| title_sort | uniting low energy semileptonic and hadronic anomalies within smeft |
| topic | Rare Decays Semi-Leptonic Decays SMEFT |
| url | https://doi.org/10.1007/JHEP12(2024)175 |
| work_keys_str_mv | AT alakabhadatta unitinglowenergysemileptonicandhadronicanomalieswithinsmeft AT jackykumar unitinglowenergysemileptonicandhadronicanomalieswithinsmeft AT sumankumbhakar unitinglowenergysemileptonicandhadronicanomalieswithinsmeft AT davidlondon unitinglowenergysemileptonicandhadronicanomalieswithinsmeft |