Taming New Physics in b to c bar u d (s) with τ (B^+)/τ(B_d) and a_(sl)^d
Reviewed by Pith T0 review T1 audit T2 compute T3 formal T4 kernel pith:53HJXODRrecord.jsonopen to challenge →
read the original abstract
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.
This paper has not been read by Pith yet.
Forward citations
Cited by 4 Pith papers
-
Predictions for $b$-baryon lifetimes at NNLO-QCD
NNLO-QCD corrections to the free b-quark decay and NLO corrections to dimension-five operators reduce uncertainties in HQE predictions for b-baryon lifetimes, yielding excellent agreement with experiment.
-
New insights into the $b\rightarrow c \bar{u}q$ puzzle through Top-Bottom synergies
Anomalies in b to c u-bar q transitions remain puzzling as proposed new physics scenarios involving SU(2) doublets are not significantly relaxed by collider dilution or factorization breakdown.
-
$b\to c \bar u q$ decay and CP violating observables in the presence of new physics contributions
Phenomenological constraints on complex Wilson coefficients in b→cūq transitions from branching fraction tensions, yielding predictions for ACP, γ, and mixing observables under color-singlet and color-rearranged scenarios.
-
$b\to c \bar u q$ decay and CP violating observables in the presence of new physics contributions
Phenomenological constraints on complex Wilson coefficients for b→cūq transitions from branching fraction tensions, yielding predictions for ΔΓd/Γd, ASL^d and ACP under color-singlet and color-rearranged scenarios.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.