Charming new physics in rare B-decays and mixing?
| Autor: | Jäger, Sebastian, Kirk, Matthew, Lenz, Alexander, Leslie, Kirsten |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 97, 015021 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.97.015021 |
| Popis: | We conduct a systematic study of the impact of new physics in quark-level $b \to c \bar{c} s$ transitions on $B$-physics, in particular rare $B$-decays and $B$-meson lifetime observables. We find viable scenarios where a sizable effect in rare semileptonic $B$-decays can be generated, compatible with experimental indications and with a possible dependence on the dilepton invariant mass, while being consistent with constraints from radiative $B$-decay and the measured $B_s$ width difference. We show how, if the effect is generated at the weak scale or beyond, strong renormalisation-group effects can enhance the impact on semileptonic decays while leaving radiative $B$-decay largely unaffected. A good complementarity of the different $B$-physics observables implies that precise measurements of lifetime observables at LHCb may be able to confirm, refine, or rule out this scenario. Comment: 7 pagers, 5 figures (v2: journal version) |
| Databáze: | arXiv |
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