Physics beyond the Standard Model through 𝑏 → 𝑠𝜇+ 𝜇- transition

Pramana

Diptimoy Ghosh1¹ 

[1] Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India$$

关键词: 𝐵 Physics;    CP violation;    beyond Standard Model.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

A comprehensive study of the impact of new-physics operators with different Lorentz structures on decays involving the 𝑏 → 𝑠𝜇+ 𝜇- transition is performed. The effects of new vector– axial vector (VA), scalar–pseudoscalar (SP) and tensor (T) interactions on the differential branching ratios, forward–backward asymmetries ($A_{ext{FB}}$ ’s), and direct CP asymmetries of $ar{B}_{s}^{0} → 𝜇^{+} 𝜇^{-}, ar{B}_{d}^{0} → X_{s} 𝜇^{+} 𝜇^{-}, ar{B}_{s}^{0} → 𝜇^{+} 𝜇^{-} 𝛾, ar{B}_{d}^{0} → ar{K} 𝜇^{+} 𝜇^{-}$, and $ar{B}_{d}^{0} → ar{K}^{*} 𝜇^{+} 𝜇^{-}$ are examined. In $ar{B}_{d}^{0} → ar{K}^{*} 𝜇^{+} 𝜇^{-}$, we also explore the longitudinal polarization fraction $f_{ext{L}}$ and the angular asymmetries $A_{ext{T}}^{2}$ and $A_{ext{LT}}$, the direct CP asymmetries in them, as well as the triple-product CP asymmetries $A_{ext{T}}^{ext{(im)}}$ and $A_{ext{{LT}}^{ext{(im)}}$. While the new VA operators can significantly enhance most of the observables beyond the Standard Model predictions, the SP and T operators can do this only for $A_{ext{FB}}$ in $ar{B}_{d}^{0} → ar{K} 𝜇^{+} 𝜇^{-}$.

【 授权许可】

Unknown