Siddi, Benedetto Gianluca (2017) b-hadron semileptonic decays with τ leptons in final states in LHCb. Il nuovo cimento C, 40 (1). pp. 1-3. ISSN 1826-9885
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Abstract
Lepton universality, described in the Standard Model, predicts equal coupling between gauge bosons and the three lepton families. SM extensions give additional interactions, implying in some cases a stronger coupling with the third generation of leptons. Semileptonic decays of b-hadrons provide a sensitive probe to such New Physics effects. The presence of additional charged Higgs bosons, required by such SM extensions, can have significant effect on the semileptonic decay rate of ¯ B0 → D∗+τ−¯ ντ. The combination of experimental measurements give a deviation from the standard model prediction of about 4 σ. It is therefore important to perform additional measurements in this sector in order to improve the precision and confirm or disprove this deviation. Results obtained by LHCb on B0 → D∗−τ+ντ decays, where the τ decays leptonically, are reported. The LHCb perspectives with other final states are discussed.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 16 Nov 2020 21:23 |
| Last Modified: | 16 Nov 2020 21:23 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/19808 |
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