Taming New Physics in $b \to c \bar u d (s) $ with $\tau (B^+)/\tau(B_d)$ and $a_{sl}^d$

Autor:	Lenz, Alexander, Müller, Jakob, Piscopo, Maria Laura, Rusov, Aleksey V.
Rok vydání:	2022
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Experiment
Druh dokumentu:	Working Paper
Popis:	Inspired by the recently observed tensions between the experimental data and the theoretical predictions, based on QCD factorisation, for several colour-allowed non-leptonic $B$-meson decays, we study the potential size of new physics (NP) effects in the decay channels $b \to c \bar{u} d(s)$. Starting from the most general effective Hamiltonian describing the $b \to c \bar{u} d(s)$ transitions, we compute NP contributions to the theoretical predictions of $B$-meson lifetime and of $B$-mixing observables. The well-known lifetime ratio $\tau (B^+)/\tau (B_d)$ and the experimental bound on the semi-leptonic CP asymmetry $a_{sl}^d$, provide strong, complementary constraints on some of the NP Wilson coefficients. Comment: 29 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2211.02724 Zobrazit plný text záznamu View this record from Arxiv