تقرير
Mixing asymmetries in B meson systems, the D0 like-sign dimuon asymmetry and generic New Physics
| العنوان: | Mixing asymmetries in B meson systems, the D0 like-sign dimuon asymmetry and generic New Physics |
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| المؤلفون: | Botella, F. J., Branco, G. C., Nebot, M., Sanchez, A. |
| المصدر: | Phys. Rev. D 91, 035013 (2015) |
| سنة النشر: | 2014 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | The measurement of a large like-sign dimuon asymmetry $A^b_{SL}$ by the D0 experiment at the Tevatron departs noticeably from Standard Model expectations and it may be interpreted as a hint of physics beyond the Standard Model contributing to $\Delta B\neq 0$ transitions. In this work we analyse how the natural suppression of $A^b_{SL}$ in the SM can be circumvented by New Physics. We consider generic Standard Model extensions where the charged current mixing matrix is enlarged with respect to the usual $3\times 3$ unitary Cabibbo-Kobayashi-Maskawa matrix, and show how, within this framework, a significant enhancement over Standard Model expectations for $A^b_{SL}$ is easily reachable through enhancements of the semileptonic asymmetries $A^d_{SL}$ and $A^s_{SL}$ of both $B^0_d$ - $\bar B^0_d$ and $B^0_s$ - $\bar B^0_s$ systems. Despite being insufficient to reproduce the D0 measurement, such deviations from SM expectations may be probed by the LHCb experiment. Comment: 17 pages, 10 figures, 1 table. Improved sections 2 and 3, updated results, conclusions unchanged |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.91.035013 |
| URL الوصول: | http://arxiv.org/abs/1402.1181 |
| رقم الأكسشن: | edsarx.1402.1181 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.91.035013 |
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