New physics solutions for R D and R D∗
Abstract Recent measurements of R D∗ have reduced tension with the Standard Model prediction. Taking all the present data into account, we obtain the values of the Wilson coefficients of each new physics four-fermion operator of a given Lorentz structure. We find that the combined data rule out most...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-09-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP09(2018)152 |
| _version_ | 1828496129468137472 |
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| author | Ashutosh Kumar Alok Dinesh Kumar Jacky Kumar Suman Kumbhakar S. Uma Sankar |
| author_facet | Ashutosh Kumar Alok Dinesh Kumar Jacky Kumar Suman Kumbhakar S. Uma Sankar |
| author_sort | Ashutosh Kumar Alok |
| collection | DOAJ |
| description | Abstract Recent measurements of R D∗ have reduced tension with the Standard Model prediction. Taking all the present data into account, we obtain the values of the Wilson coefficients of each new physics four-fermion operator of a given Lorentz structure. We find that the combined data rule out most of the solutions based on scalar/pseudoscalar operators. By studying the inter-relations between different solutions, we find that there are only four allowed solutions, which are based on operators with (V − A), linear combination of (V − A) and (V + A), tensor and linear combination of scalar/pseudoscalar and tensor structure. We demonstrate that the need for new physics is driven by those measurement of R D and R D∗ where the τ lepton is not studied. Further, we show that new physics only in b→cμν¯ $$ b\to c\ \mu \overline{\nu} $$ is not compatible with the full set of observables in the decays B→Dlν¯ $$ B\to Dl\overline{\nu} $$ and B→D∗lν¯ $$ B\to {D}^{\ast }l\overline{\nu} $$. |
| first_indexed | 2024-12-11T12:24:26Z |
| format | Article |
| id | doaj.art-7c0067eb6bd7404ba12b045bed89aef1 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-11T12:24:26Z |
| publishDate | 2018-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-7c0067eb6bd7404ba12b045bed89aef12022-12-22T01:07:26ZengSpringerOpenJournal of High Energy Physics1029-84792018-09-012018911910.1007/JHEP09(2018)152New physics solutions for R D and R D∗Ashutosh Kumar Alok0Dinesh Kumar1Jacky Kumar2Suman Kumbhakar3S. Uma Sankar4Indian Institute of Technology JodhpurDepartment of Physics, University of RajasthanDepartment of High Energy Physics, Tata Institute of Fundamental ResearchDepartment of Physics, Indian Institute of Technology BombayDepartment of Physics, Indian Institute of Technology BombayAbstract Recent measurements of R D∗ have reduced tension with the Standard Model prediction. Taking all the present data into account, we obtain the values of the Wilson coefficients of each new physics four-fermion operator of a given Lorentz structure. We find that the combined data rule out most of the solutions based on scalar/pseudoscalar operators. By studying the inter-relations between different solutions, we find that there are only four allowed solutions, which are based on operators with (V − A), linear combination of (V − A) and (V + A), tensor and linear combination of scalar/pseudoscalar and tensor structure. We demonstrate that the need for new physics is driven by those measurement of R D and R D∗ where the τ lepton is not studied. Further, we show that new physics only in b→cμν¯ $$ b\to c\ \mu \overline{\nu} $$ is not compatible with the full set of observables in the decays B→Dlν¯ $$ B\to Dl\overline{\nu} $$ and B→D∗lν¯ $$ B\to {D}^{\ast }l\overline{\nu} $$.http://link.springer.com/article/10.1007/JHEP09(2018)152Beyond Standard ModelHeavy Quark Physics |
| spellingShingle | Ashutosh Kumar Alok Dinesh Kumar Jacky Kumar Suman Kumbhakar S. Uma Sankar New physics solutions for R D and R D∗ Journal of High Energy Physics Beyond Standard Model Heavy Quark Physics |
| title | New physics solutions for R D and R D∗ |
| title_full | New physics solutions for R D and R D∗ |
| title_fullStr | New physics solutions for R D and R D∗ |
| title_full_unstemmed | New physics solutions for R D and R D∗ |
| title_short | New physics solutions for R D and R D∗ |
| title_sort | new physics solutions for r d and r d∗ |
| topic | Beyond Standard Model Heavy Quark Physics |
| url | http://link.springer.com/article/10.1007/JHEP09(2018)152 |
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