Articles publicats en revistes: Envíos recientes
Mostrando ítems 181-200 de 546
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Measurement of the χ b (3P) mass and of the relative rate of χ b1(1P) and χ b2(1P) production
(Journal of High Energy Physics, 2014, Vol. 2014, No.10 (Octubre), 2014-10-14)The production of χ b mesons in proton-proton collisions is studied using a data sample collected by the LHCb detector, at centre-of-mass energies of s√ =7 and 8 TeV and corresponding to an integrated ... -
Measurement of J/Ψ production in pp collisions at s√=7 TeV
(The European Physical Journal C, 2011. Vol. 71, No. 5 (Maig), 2011-05-19)The production of J/ψ mesons in proton–proton collisions at s√=7\ensuremath TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/ψ production is measured as a ... -
Observation of the Λ 0 b → J/ψ pπ − decay
(Journal of High Energy Physics, 2014, Vol. 2014, No.7 (Juliol), 2014-07-22)The first observation of the Cabibbo-suppressed decay Λ 0 b → J/ψpπ − is reported using a data sample of proton-proton collisions at 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. A ... -
Measurement of the fraction of Υ (1S) originating from χb (1P) decays in pp collisions at√s= 7 TeV
(Journal of High Energy Physics, 2012, Vol. 2012, No. 11 (Novembre), 2012-11-08)The production of χb(1P ) mesons in pp collisions at a centre-of-mass energy of 7 TeV is studied using 32 pb−1 of data collected with the LHCb detector. The χb(1P ) mesons are reconstructed in the decay ... -
Limits on neutral Higgs boson production in the forward region in pp collisions at s√=7 TeV
(Journal of High Energy Physics, 2013, Vol. 2013, No.5 (Maig), 2013-05-27)Limits on the cross-section times branching fraction for neutral Higgs bosons, produced in pp collisions at s√=7 TeV, and decaying to two tau leptons with pseudorapidities between 2.0 and 4.5, are ... -
Measurement of the cross-section for Z → e+e- production in pp collisions at s√=7 TeV
(Journal of High Energy Physics, 2013, Vol. 2013, No.2 (Febrer), 2013-02-19)A measurement of the cross-section for pp → Z → e+e− is presented using data at s√=7 TeV corresponding to an integrated luminosity of 0.94 fb−1. The process is measured within the kinematic acceptance ... -
Differential branching fraction and angular analysis of the decay B0s → ϕμ + μ −
(Journal of High Energy Physics, 2013, Vol. 2013, No.7 (Juliol), 2013-07-11)The determination of the differential branching fraction and the first angular analysis of the decay B0s → ϕμ + μ − are presented using data, corresponding to an integrated luminosity of 1.0 fb−1, ... -
Time alignment of the front end electronics of the LHCb calorimeters
(Journal of Instrumentation, 2012, Vol. 7, No.8 (Agost), 2012-08-21)LHCb is the experiment at the Large Hadron Collider at CERN designed for performing studies of CP-symmetry violation and rare decays of B-hadrons. Its calorimeter system allows to trigger on photons and ... -
A study of the Z production cross-section in pp collisions at s√=7TeV using tau final states
(Journal of High Energy Physics, 2013, Vol. 2013, No.1 (Gener), 2013-01-16)A measurement of the inclusive Z → ττ cross-section in pp collisions at s√=7TeV is presented based on a dataset of 1.0 fb−1 collected by the LHCb detector. Candidates for Z → τ τ decays are identified ... -
Measurement of |Vcb| with Bs → Ds(*) −μ +νμ decays
(Physical Review D, 2020, Vol. 101, n.7 (Abril), 2020-03)The element |Vcb| of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic B0s decays produced in proton-proton collision data collected with the LHCb detector at center-of-mass energies ... -
Measurement of CP asymmetries in the decays B 0 → K *0 μ + μ − and B + → K + μ + μ −
(Journal of High Energy Physics, 2014, Vol. 2014, No.9 (Setembre), 2014-09-30)The direct CP asymmetries of the decays B 0 → K *0 μ + μ − and B + → K + μ + μ − are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector. ... -
Study of B0(s)→K0Sh+h′− decays with first observation of B0s→K0SK±π∓ and B0s→K0Sπ+π−
(Journal of High Energy Physics, 2013, Vol. 2013, No.10 (Octubre), 2013-10-22) -
Study of η − η′ mixing from measurement of B 0(s) → J/ψη(′) decay rates
(Journal of High Energy Physics, 2015, Vol. 2015, No.1 (Gener), 2015-01-08)A study of B and Bs meson decays into J/ψ η and J/ψ η′ final states is performed using a data set of proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, collected by the LCHb experiment ... -
Measurement of CP asymmetry in B 0 s → D ∓ s K ± decays
(Journal of High Energy Physics, 2014, Vol. 2014, No.11 (Novembre), 2014-11-13)We report on measurements of the time-dependent CP violating observables in B 0 s → D ∓ s K ± decays using a dataset corresponding to 1.0 fb−1 of pp collisions recorded with the LHCb detector. We find ... -
Measurement of the Z+b-jet cross-section in pp collisions at s√ = 7 TeV in the forward region
(Journal of High Energy Physics, 2015, Vol. 2015, No.1 (Gener), 2015-01-13)The associated production of a Z boson or an off-shell photon γ * with a bottom quark in the forward region is studied using proton-proton collisions at a centre-of-mass energy of 7 TeV. The Z bosons ... -
Measurement of J/ψ production in pp collisions at s√=2.76TeV
(Journal of High Energy Physics, 2013, Vol. 2013, No.2 (Febrer), 2013-02-07)The production of J/ψ mesons is studied with the LHCb detector using data from pp collisions at s√=2.76 TeV corresponding to an integrated luminosity of 71 nb−1. The differential cross-section for ... -
Measurement of the Semileptonic C P Asymmetry in B0 - ̄B0 Mixing
(Physical Review Letters , 2015, Vol. 114, No. 4 (Gener), 2015-01-28)The semileptonic CP asymmetry in B0-¯B0 mixing, adsl, is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb−1, recorded by the LHCb experiment. Semileptonic ... -
Measurement of the forward Z boson production cross-section in pp collisions at s√=7 TeV
(Journal of High Energy Physics, 2015, Vol. 2015, No.8 (Agost), 2015-08-10)A measurement of the production cross-section for Z bosons that decay to muons is presented. The data were recorded by the LHCb detector during pp collisions at a centre-of-mass energy of 7 TeV, and ... -
Forward production of Υ mesons in pp collisions at s√=7 and 8 TeV
(Journal of High Energy Physics, 2015, Vol. 2015, No.11 (Novembre), 2015-11-16)The production of Υ mesons in pp collisions at s√=7 and 8 TeV is studied with the LHCb detector using data samples corresponding to an integrated luminosity of 1 fb−1 and 2 fb−1 respectively. The ... -
Measurement of CP observables in B 0 → DK ∗0 with D →K + K −
(Journal of High Energy Physics, 2013, Vol. 2013, No.3 (Març), 2013-03-12)The decay B 0 → DK *0 and the charge conjugate mode are studied using 1.0 fb−1 of pp collision data collected by the LHCb experiment at s√=7 TeV in 2011. The CP asymmetry between the B 0 → DK *0 and the ...