Articles publicats en revistes: Enviaments recents
Ara mostrant els elements 261-280 de 538
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Search for the lepton flavour violating decay τ − → μ − μ + μ −
(Journal of High Energy Physics, 2015, Vol. 2015, No.2 (Febrer), 2015-02-18)A search for the lepton flavour violating decay τ − → μ − μ + μ − is performed with the LHCb experiment. The data sample corresponds to an integrated luminosity of 1.0 fb−1 of proton-proton collisions ... -
Measurement of the inelastic pp cross-section at a centre-of-mass energy of s√ = 7 TeV
(Journal of High Energy Physics, 2015, Vol. 2015, No.2 (Febrer), 2015-02-19)The cross-section for inelastic proton-proton collisions, with at least one prompt long-lived charged particle of transverse momentum p T > 0.2GeV/c in the pseudorapidity range 2.0 < η < 4.5, is measured ... -
Measurement of ψ(2S) production cross-sections in proton-proton collisions at s√=7 and 13 TeV
(The European Phisical Journal C, 2020, 185, 2020-02)The cross-sections of ψ(2S) meson production in proton-proton collisions at s√=13 TeV are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of 275 pb−1. ... -
Measurement of σ(pp → bb X) at √s = 7 TeV in the forward region
(Physics Letters B , 2010, Vol. 694, No. 3 (Novembre), 2010-11-08)Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the bb production cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In ... -
Observation of New Ξ0c Baryons Decaying to Λ+cK−
(Physical Review Letters, 2020, Vol.124, 222001, 2020-06)The Λ+cK− mass spectrum is studied with a data sample of pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6 fb−1 collected by the LHCb experiment. Three ... -
First Observation of Excited Ω−b States
(Physical Review Letters, 2020, Vol.124, 082002, 2020-02)We report four narrow peaks in the Ξ0bK− mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb−1 recorded by ... -
Search for A′→μ+μ− Decays
(Physical Review Letters, 2020, Vol.124, 041801, 2020-01)Searches are performed for both promptlike and long-lived dark photons, A′, produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look for A′→μ+μ− decays using a data ... -
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon
(Physical Review Letters , 2014, Vol. 113, No.3 (Juliol), 2014-07-15)Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb−1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ0b→Ξ+cπ−, Ξ+c→pK−π+ signal decays ... -
Measurement of the B0s→J/ψ¯¯¯¯K*0 branching fraction and angular amplitudes
(Physical Review D, 2012, No. 86 (Octubre), 2012-10-08)A sample of 114±11 B0s→J/ψK−π+ signal events obtained with 0.37 fb−1 of pp collisions at √s=7 TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes ... -
First observation of the decay B+→π+μ+μ−
(Journal of High Energy Physics, 2012, Vol. 2012, No.12 (Desembre), 2012-12-21)A discovery of the rare decay B + → π + μ + μ − is presented. This decay is observed for the first time, with 5.2 σ significance. The observation is made using pp collision data, corresponding to an ... -
Measurement of CP observables in B± → DK± and B± → Dπ± with D → K0SK±π∓ decays
(Journal of High Energy Physics, 2020, 58, 2020-05)Measurements of CP observables in B± → DK± and B± → Dπ± decays are presented, where D represents a superposition of D0 and D¯¯¯¯0 states. The D meson is reconstructed in the three-body final states ... -
Measurement of the charge asymmetry in B±→ϕK±B±→ϕK± and search for B±→ϕπ±B±→ϕπ± decays
(Physics Letters B , 2014, Vol. 728, (Gener), 2014-01-20)The CP-violating charge asymmetry in B±→ϕK±B±→ϕK± decays is measured in a sample of pp collisions at 7 TeV centre-of-mass energy, corresponding to an integrated luminosity of 1.0 fb−1 collected by the ... -
First observation and amplitude analysis of the B−→D+K−π− decay
(Physical Review D, 2015, Vol.91, No.9 (Maig), 2015-05-05)The B−→D+K−π− decay is observed in a data sample corresponding to 3.0 fb−1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. Its branching fraction is measured to be ... -
Measurement of the Ξ−b and Ω−b baryon lifetimes
(Physics Letters B , 2014, Vol. 736, (Setembre), 2014-09-07)Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb−1, the Ξ−b and Ω−b baryons are reconstructed in the Ξ−b→J/ψΞ− and Ω−b→J/ψΩ− decay modes and their lifetimes measured ... -
Measurement of the isospin asymmetry inB→K(∗)μ+μ−decays
(Journal of High Energy Physics, 2012, Vol. 2012, No.7 (Juliol), 2012-07-20)The isospin asymmetries of B → K (∗) μ + μ − decays and the partial branching fractions of B 0 → K 0 μ + μ − and B + → K ∗+ μ + μ − are measured as a function of the di-muon mass squared q 2 using an ... -
Precision measurement of the ratio of the Λb0 to B¯0 lifetimes
(Physics Letters B , 2014, Vol. 734, (Juny), 2014-06-27)The LHCb measurement of the lifetime ratio of the Λ0b to the B⎯⎯⎯0 meson is updated using data corresponding to an integrated luminosity of 3.0 fb−1 collected using 7 and 8 TeV centre-of-mass energy pp ... -
Fractal Antennas: An Historical Perspective
(Fractal and Fractional, 2020, Vol. 4, No 1, 2020-01)Fractal geometry has been proven to be useful in several disciplines. In the field of antennaengineering, fractal geometry is useful to design small and multiband antenna and arrays, andhigh-directive ... -
Amplitude analysis of B0 → ¯D0K+π− decays
(Physical Review D, 2015, Vol.92, No.1 (Juliol), 2015-07-20)The Dalitz plot distribution of B0→¯D0K+π− decays is studied using a data sample corresponding to 3.0 fb−1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. The data are described ... -
Study of W boson production in association with beauty and charm
(Physical Review D, 2015, Vol. 92, No. 5 (Setembre), 2015-09-08)The associated production of a W boson with a jet originating from either a light parton or heavy-flavor quark is studied in the forward region using proton-proton collisions. The analysis uses data ... -
Model-independent confirmation of the Z(4430)− state
(Physical Review D, 2015, Vol. 92, No. 11 (Desembre), 2015-12-29)The decay B0→ψ(2S)K+π− is analyzed using 3 fb−1 of pp collision data collected with the LHCb detector. A model-independent description of the ψ(2S)π mass spectrum is obtained, using as input the Kπ ...