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The LHCb detector at the LHC
The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva). The initial configuration and expected
Test of lepton universality using b+ → K+ℓ+ℓ- decays.
The value of the ratio of branching fractions for the dilepton invariant mass squared range 1 < q(2) < 6 GeV(2)/c(4) is measured to be 0.745(-0.074)(+0.090)(stat) ± 0.036(syst).
Angular analysis of the B0 → K*0μ+μ− decay using 3 fb−1 of integrated luminosity
A bstractAn angular analysis of the B0 → K*0(→ K+π−)μ+μ− decay is presented. The dataset corresponds to an integrated luminosity of 3.0 fb−1 of pp collision data collected at the LHCb experiment. The
Observation of J/ψp Resonances Consistent with Pentaquark States in Λ_{b}^{0}→J/ψK^{-}p Decays.
To obtain a satisfactory fit of the structures seen in the J/ψp mass spectrum, it is necessary to include two Breit-Wigner amplitudes that each describe a resonant state.
Differential branching fractions and isospin asymmetries of B → K(*)μ+μ− decays
A bstractThe isospin asymmetries of B → Kμ+μ− and B → K*μ+μ− decays and the partial branching fractions of the B0 → K0μ+μ−, B+ → K+μ+μ− and B+ → K*+μ+μ− decays are measured as functions of the dimuon
Test of lepton universality with B0 → K*0ℓ+ℓ− decays
A bstractA test of lepton universality, performed by measuring the ratio of the branching fractions of the B0 → K*0μ+μ− and B0 → K*0e+e− decays, RK*0$$ {R}_{K^{*0}} $$, is presented. The K*0 meson is
Observation of the Doubly Charmed Baryon Ξ_{cc}^{++}.
The doubly charmed baryon Ξ_{cc}^{++} state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7  fb^{-1}, and confirmed in an additional sample of data collected at 8  TeV.
Measurement of form-factor-independent observables in the decay B0→K(*0)μ(+)μ(-).
A measurement of form-factor-independent angular observables in the decay B(0)→K*(892)(0)μ(+)μ(-) is presented, based on a data sample collected by the LHCb experiment in pp collisions at a center-of-mass energy of 7 TeV.
Measurement of J/ψ production in pp collisions at √ s = 7T eV
The production of mesons in proton–proton collisions at is studied with the LHCb detector at the LHC. The differential cross-section for prompt production is measured as a function of the transverse