The LHCb detector at the LHC
- A. A. Alves, L. M. A. Filho, T. Ypsilantis
- Physics
- 14 August 2008
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.
- R. Aaij, B. Adeva, J. Rademacker
- PhysicsPhysical Review Letters
- 6 October 2014
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).
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.
Angular analysis of the B0 → K*0μ+μ− decay using 3 fb−1 of integrated luminosity
- R. Aaij, C. Abellán Beteta, M. Petruzzo
- Physics
- 14 December 2015
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 the Doubly Charmed Baryon Ξ_{cc}^{++}.
- R. Aaij, B. Adeva, I. Nasteva
- PhysicsPhysical Review Letters
- 5 July 2017
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.
Test of lepton universality with B0 → K*0ℓ+ℓ− decays
- R. Aaij, B. Adeva, C. Onderwater
- Physics
- 16 August 2017
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…
Test of lepton universality in beauty-quark decays
- L. C. R. Aaij, C. Beteta, G. Zunica
- PhysicsNature Physics
- 22 March 2021
The standard model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged leptons, the electron,…
Measurement of J/ψ production in pp collisions at √ s = 7T eV
- R. Aaij, M. Adinolfi, P. Koppenburg
- Physics
- 2011
The production of J/ψ mesons in proton–proton collisions at √ s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/ψ production is measured as…
Measurement of form-factor-independent observables in the decay B0→K(*0)μ(+)μ(-).
- R. Aaij, B. Adeva, M. Sannino
- PhysicsPhysical Review Letters
- 7 August 2013
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.
Observation of a Narrow Pentaquark State, P_{c}(4312)^{+}, and of the Two-Peak Structure of the P_{c}(4450)^{+}.
- R. Aaij, C. Abellán Beteta, J. Mead
- PhysicsPhysical Review Letters
- 8 April 2019
A narrow pentaquark state, P_{c}(4312)^{+}, decaying to J/ψp, is 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…
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