| Preprint | |
| Report number | arXiv:2105.11837 |
| Title | Anatomy of a new anomaly in non-leptonic B decays |
| Author(s) | Algueró, M. (Barcelona, IFAE ; Barcelona, Autonoma U.) ; Crivellin, A. (CERN ; Zurich U. ; PSI, Villigen) ; Descotes-Genon, S. (IJCLab, Orsay) ; Matias, J. (Barcelona, IFAE ; Barcelona, Autonoma U.) ; Novoa-Brunet, M. (IJCLab, Orsay) |
| Imprint | 2021-05-25 |
| Number of pages | 4 |
| Note | 4 pages, 2 figures, Contribution to the 2021 QCD session of the 55th Rencontres de Moriond |
| Presented at | 55th Rencontres de Moriond on QCD and High Energy Interactions, Online, Online, 27 Mar - 3 Apr 2021, pp. |
| Subject category | hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology |
| Abstract | We discuss the anatomy of the $L_{VV}$ observable designed as a ratio of the longitudinal components of $B_s \to VV$ versus $B_d \to VV$ decays. We focus on the particular case of $B_{d,s} \to K^{*0} {\bar K^{*0}}$ where we find for the SM prediction $L_{K^* \bar{K}^*}=19.5^{+9.3}_{-6.8}$ implying a 2.6$\sigma$ tension with respect to data. The interpretation of this tension in a model independent way identifies two Wilson coefficients ${\cal C}_{4}$ and ${\cal C}_{8g}$ as possible sources. The example of one simplified model including a Kaluza-Klein (KK) gluon is discussed. This KK gluon embedded inside a composite/extra dimensional model combined with a $Z^\prime$ can explain also the $b\to s\ell\ell$ anomalies albeit with a significant amount of fine-tuning. |
| Other source | Inspire |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) |
Notice créée le 2021-06-11, modifiée le 2023-07-27
