تقرير
Anatomy of a new anomaly in non-leptonic B decays
| العنوان: | Anatomy of a new anomaly in non-leptonic B decays |
|---|---|
| المؤلفون: | Algueró, M., Crivellin, A., Descotes-Genon, S., Matias, J., Novoa-Brunet, M. |
| سنة النشر: | 2021 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | 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. Comment: 4 pages, 2 figures, Contribution to the 2021 QCD session of the 55th Rencontres de Moriond |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/2105.11837Test |
| رقم الانضمام: | edsarx.2105.11837 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |