Quantum Chromodynamics, the theory of quarks and gluons, whose interactions can be
described by a local SU (3) gauge symmetry with charges called “color quantum numbers” …

At the present time (2022), there are discrepancies with the predictions of the Standard
Model in several observables involving b→ s ℓ+ ℓ− and decays. These are the B flavor …

The standard model of particle physics currently provides our best description of
fundamental particles and their interactions. The theory predicts that the different charged …

The ratios of branching fractions $\mathcal {R}(D^{*})\equiv\mathcal {B}(\bar {B}\to
D^{*}\tau^{-}\bar {\nu} _ {\tau})/\mathcal {B}(\bar {B}\to D^{*}\mu^{-}\bar {\nu} _ {\mu}) $ and …

The ratio of branching fractions R (D*-)≡ B (B 0→ D*-τ+ ν τ)/B (B 0→ D*-μ+ ν μ) is measured
using a data sample of proton-proton collisions collected with the LHCb detector at center-of …

A bstract We investigate the high-p T tails of the pp→ ℓν and pp→ ℓℓ Drell-Yan processes as
probes of New Physics in semileptonic interactions with an arbitrary flavor structure. For this …

A bstract Stringent relations between the B (∗)→ D (∗) form factors exist in the heavy quark
limit and the leading symmetry breaking corrections are known. We reconsider their …

A measurement is reported of the ratio of branching fractions R (J/ψ)= B (B c+→ J/ψ τ+ ν τ)/B
(B c+→ J/ψ μ+ ν μ), where the τ+ lepton is identified in the decay mode τ+→ μ+ ν μ ν¯ τ. This …

The experimental results on the ratios of branching fractions R (D)= B (B¯→ D τ-ν¯ τ)/B
(B¯→ D ℓ-ν¯ ℓ) and R (D*)= B (B¯→ D* τ-ν¯ τ)/B (B¯→ D* ℓ-ν¯ ℓ), where ℓ denotes an …

A search for leptoquarks produced singly and in pairs in proton-proton collisions is
presented. We consider the leptoquark (LQ) to be a scalar particle of charge− 1/3e coupling …