J. Arnau Romeu

TL;DR: In this paper, a test of lepton universality, performed by measuring the ratio of the branching fractions of the $B^{0} \rightarrow K^{*0}\mu+}\mu^{+}e^{-}$ decays, is presented.

TL;DR: In this article, a test of lepton universality is performed by measuring the ratio of the branching fractions of the B$0$ → K$*0}$ e$+}$ π$−}$ decays, and the ratio is measured in two regions of the dilepton invariant mass squared.

TL;DR: This is the most precise measurement of R_{K} to date and is compatible with the standard model at the level of 2.5 standard deviations.

TL;DR: In this paper, a new pentaquark state, P_{c}(4312)+, was discovered with a statistical significance of 7.3σ in a data sample of Λ_{b}^{0}→J/ψpK^{-} decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration.

TL;DR: In this article, the τ lepton was reconstructed with three charged pions in the final state using a novel method that exploits the different vertex topologies of signal and background to isolate samples of semitauonic decays of b hadrons with high purity.