Listando La Salle por materia "Col·lisions (Física nuclear)"
Mostrando ítems 101-120 de 219
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Measurement of the polarization amplitudes in B0→J/ψK∗(892)0 decays
(Physical Review D, 2013, Vol. 88 , No.5 (Setembre), 2013-09-03)An analysis of the decay B0→J/ψK∗(892)0 is presented using data, corresponding to an integrated luminosity of 1.0 fb−1, collected in pp collisions at a center-of-mass energy of 7 TeV with the LHCb ... -
Measurement of the ratio of B+c branching fractions to J/ψπ+ and J/ψμ+νμ final states
(Physical Review D, 2014, Vol. 90 , No.3 (Agost), 2014-08-27)The first measurement that relates semileptonic and hadronic decay rates of the B+c meson is performed using proton-proton collision data corresponding to 1.0 fb−1 of integrated luminosity collected ... -
Measurement of the ratio of branching fractions B(B0 → K∗0γ )/B(B0 s → φγ ) and the direct CP asymmetry in B0 → K∗0γ
(Nuclear Physics B, 2012, Vol. 867, 2012-09)The ratio of branching fractions of the radiative B decays B0→K∗0γ andB0s→φγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a ... -
Measurement of the ratio of branching fractions B(B0→K*0γ)/B(B0s→ϕγ)
(Physical Review D, 2012, Vol. 85 , No.11 (Juny), 2012-06-25)The ratio of branching fractions of the radiative B decays B0→K*0γ and B0s→ϕγ has been measured using 0.37 fb−1 of pp collisions at a center of mass energy of √s=7 TeV, collected by the LHCb experiment. ... -
Measurement of the ratio of branching fractions B(Bd→K∗0γ)/B(Bs→ϕγ) with the LHCb experiment at s√=7~TeV
(2011-08)The ratio of branching ratios of the radiative B decays Bd→K∗0γ and Bs→ϕγ has been measured using 340.1~pb−1 of \emph{pp} collisions at a centre of mass energy of s√=7~TeV taken with the LHCb detector. ... -
Measurement of the Ratio of Branching Fractions B(¯B0→D*+τ−¯ντ)/B(¯B0→D*+μ−¯νμ)
(Physical Review Letters, 2015, Vol. 115, No. 11 (Setembre), 2015-09-09)The branching fraction ratio R(D∗)≡B(¯B0→D*+τ−¯ντ)/B(¯B0→D*+μ−¯νμ) is measured using a sample of proton-proton collision data corresponding to 3.0 fb−1 of integrated luminosity recorded by the LHCb ... -
Measurement of the ratio of prompt χc to J/ψ production in pp collisions at √s=7TeV
(Physics Letters B , 2012, Vol. 718, No. 2 (Desembre), 2012-12-05)The prompt production of charmoniumχcandJ/ψstates is studied in proton–proton collisionsat a centre-of-mass energy of√s=7 TeV at the Large Hadron Collider. TheχcandJ/ψmesonsare identified through their ... -
Measurement of the relative rate of prompt χ c0, χ c1 and χ c2 production at s√=7 TeV
(Journal of High Energy Physics, 2013, Vol. 2013, No.10 (Octubre), 2013-10-18)Prompt production of charmonium χ c0, χ c1 and χ c2 mesons is studied using proton-proton collisions at the LHC at a centre-of-mass energy of s√=7 TeV. The χ c mesons are identified through their decay ... -
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 time-dependent CP asymmetries in B 0s → J/ψK 0S
(Journal of High Energy Physics, 2015, Vol. 2015, No.6 (Juny), 2015-06-18) -
Measurement of the time-dependent CP asymmetry in B0 → J/ψ K0S decays
(Physics Letters B, Vol. 721, No. 1-3 (Abril 2013), 2013-04-10)This Letter reports a measurement of the CP violation observables S J/ψK0S and C J/ψK0S in the decay channel B0 → J/ψ K0S performed with 1.0 fb-1 of pp collisions at √s = 7 TeV collected by the LHCb ... -
Measurement of the time-integrated CP asymmetry in D 0 → K 0S K 0S decays
(Journal of High Energy Physics, 2015, Vol. 2015, No.10 (Octubre), 2015-10-08)The time-integrated CP asymmetry in the decay D 0 → K 0S K 0S is measured using 3 fb−1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The ... -
Measurement of the track reconstruction efficiency at LHCb
(Journal of Instrumentation, 2015, Vol. 10, No. 7, 2015-02)The determination of track reconstruction efficiencies at LHCb using J/ψ→μ+μ- decays is presented. Efficiencies above 95% are found for the data taking periods in 2010, 2011, and 2012. The ratio of the ... -
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 the ¯B0s Meson Lifetime in D+sπ− Decays
(Physical Review Letters, 2014, Vol. 113, No. 17 (Octubre), 2014-10-24)We present a measurement of the ratio of the ¯B0s meson lifetime, in the flavor-specific decay to D+sπ−, to that of the ¯B0 meson. The pp collision data used correspond to an integrated luminosity of ... -
Measurement of the ¯B0s→D−sD+s and ¯B0s→D−D+s Effective Lifetimes
(Physical Review Letters, 2014, Vol. 112, No. 11 (Març), 2014-03-19)The first measurement of the effective lifetime of the ¯B0s meson in the decay ¯B0s→D−sD+s is reported using a proton-proton collision data set, corresponding to an integrated luminosity of 3 fb−1, ... -
Measurement of the ηc(1S) production cross-section in p p collisions at s√=13 TeV
(The European Phisical Journal C, 2020, 191, 2020-03)Using a data sample corresponding to an integrated luminosity of 2.0 fb−1, collected by the LHCb experiment, the production of the ηc(1S) state in proton–proton collisions at a centre-of-mass energy of ... -
Measurement of the ηc(1S) production cross-section in proton–proton collisions via the decay ηc(1S)→pp¯¯¯
(The European Physical Journal C, 2015, Vol. 75, no. 7 (Juliol), 2015-07-04)High centre-of-mass energies available in proton-proton collisions at the LHC allow models describing charmonium production to be tested. We distinguish promptly produced charmonia from those originating ... -
Measurement of the Λ0b → J/ψΛ angular distribution angular distribution and the Λ0b polarisation in pp collisions
(Journal of High Energy Physics, 2020, 110, 2020-06-17)This paper presents an analysis of the Λ0b→ J/ψΛ angular distribution and the transverse production polarisation of Λ0b baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. ... -
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 ...