Visualitzant Articles publicats en revistes per títol
Ara mostrant els elements 346-365 de 538
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Observation of a new baryon state in the Λ0bπ+π− mass spectrum
(Journal of High Energy Physics, 2020, 136, 2020-06)A new baryon state is observed in the Λ0bπ+π− mass spectrum with high significance using a data sample of pp collisions, collected with the LHCb detector at centre-of-mass energies s√ = 7, 8 and 13 TeV, ... -
Observation of a New Excited D+s Meson in B0→D−D+K+π− Decays
(Physical Review Letters, 2021, Vol. 126, 2021-03)Using pp collision data corresponding to an integrated luminosity of 5.4 fb−1 collected with the LHCb detector at a center-of-mass energy of 13 TeV, the B0→D−D+K+π− decay is studied. A new excited D+s ... -
Observation of a new Ξ0 b state
(Physical Review D, 2021, Vol. 103, No. 1, 2021-01)Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb−1, the observation of a new excited Ξ0 b resonance decaying to the Ξ− b ... -
Observation of a new Ξ0b state
(Physical Review D, 2021, Vol. 103, 2021-01)Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to anintegrated luminosity of8.5fb−1, the observation of a new excitedΞ0bresonance decaying to theΞ−bπþfinal ... -
Observation of a Resonance in B+→K+μ+μ− Decays at Low Recoil
(Physical Review Letters, 2013, Vol. 111, No. 11 (Setembre), 2013-09-10)A broad peaking structure is observed in the dimuon spectrum of B+→K+μ+μ− decays in the kinematic region where the kaon has a low recoil against the dimuon system. The structure is consistent with ... -
Observation of associated production of a Z boson with a D meson in the forward region
(Journal of High Energy Physics, 2014, Vol. 2014, No.4 (Abril), 2014-04-14)A search for associated production of a Z boson with an open charm meson is presented using a data sample, corresponding to an integrated luminosity of 1.0 fb−1 of proton-proton collisions at a ... -
Observation of B(s)(0) → J/ψf(2)'(1525) in J/ψK+ K- final states
(Physical Review Letters, 2012, Vol. 108, No. 15 (Abril), 2012-04-09)The decay ¯¯¯B0s→J/ψK+K− is investigated using 0.16 fb−1 of data collected with the LHCb detector using 7 TeV pp collisions. Although the J/ψϕ channel is well known, final states at higher K+K− masses ... -
Observation of B0 s→K 7 K ∓ and evidence for B0 s→K − π + decays
(New Journal of Physics, 2014, Vol. 16, 2014-12)Measurements of the branching fractions of → ± ∓ B KK * s 0 and → π± ∓ B K* s 0 decays are performed using a data sample corresponding to − 1.0 fb 1 of protonproton collision data collected with the ... -
Observation of B0s –B¯¯¯¯0s mixing and measurement of mixing frequencies using semileptonic B decays
(The European Physical Journal C, 2013, Vol. 73, no. 12 (Desembre), 2013-12-04)The B0s and B 0 mixing frequencies, Δm s and Δm d , are measured using a data sample corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment in pp collisions at a centre ... -
Observation of B0s→χc1φ decay and study of B0→χ c1,2K∗0 decays
(Nuclear Physics B, 2013, Vol. 874, No. 3, 2013-09)The first observation of the decay B0s→χc1φ and a study of B0→χc1,2K∗0 decays are presented. The analysis is performed using a dataset, corresponding to an integrated luminosity of 1.0 fb−1, collected ... -
Observation of B0→¯¯¯D0K+K− and Evidence for B0s→¯¯¯D0K+K−
(Physical Review Letters, 2012, Vol. 109, No. 13 (Setembre), 2012-09-26)The first observation of the decay B0→¯¯¯D0K+K− is reported from an analysis of 0.62 fb−1 of pp collision data collected with the LHCb detector. Its branching fraction is measured relative to that of ... -
Observation of charmonium pairs produced exclusively in pp collisions
(Journal of Physics G-Nuclear and Particle Physics, 2014, Vol. 41, No. 11, 2014-09)A search is performed for the central exclusive production of pairs of charmonia produced in proton-proton collisions. Using data corresponding to an integrated luminosity of 3 fb−1 collected at ... -
Observation of CP violation in B ± → D K ± decays
(Physics Letters B, 2012, Vol. 712, No. 3 (Juny), 2012-06-06)An analysis of B+ to DK+ and B+ to Dpi+ decays is presented where the D meson is reconstructed in the two-body final states: K+pi-, K+K-, pi+pi- and pi+K-. Using 1.0 fb-1 of LHCb data, measurements of ... -
Observation of CP violation in two-body B0(s) -meson decays to charged pions and kaons
(Journal of High Energy Physics, 2021, No. 75, 2021-03)The time-dependent CP asymmetries of B0 → π+π− and B0s → K+K− decays are measured using a data sample of pp collisions corresponding to an integrated luminosity of 1.9 fb−1, collected with the LHCb ... -
Observation of D0−¯¯¯D0 Oscillations
(Physical Review Letters, 2013, Vol. 110, No. 10 (Març), 2013-03-05)We report a measurement of the time-dependent ratio of D0→K+π− to D0→K−π+ decay rates in D*+-tagged events using 1.0 fb−1 of integrated luminosity recorded by the LHCb experiment. We measure the mixing ... -
Observation of Excited Λ0b Baryons
(Physical Review Letters, 2012, Vol. 109, No. 7 (Octubre), 2012-10-26)Using pp collision data corresponding to 1.0 fb−1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Λ0bπ+π− spectrum with masses 5911.97±0.12(stat)±0.02(syst ... -
Observation of J/ψ-pair production in pp collisions at s=7 TeV
(Physics Letters B, Vol. 707, No. 1 (Gener 2012), 2012-01-16)The production of J/ψpairs in proton–proton collisions at a centre-of-mass energy of 7 TeV has beenobserved using an integrated luminosity of 37.5 pb−1collected with the LHCb detector. The productionc ... -
Observation of J/ψp Resonances Consistent with Pentaquark States in Λ0b→J/ψK−p Decays
(Physical Review Letters, 2015, Vol. 115, No. 7 (Agost), 2015-08-12)Observations of exotic structures in the J/ψp channel, which we refer to as charmonium-pentaquark states, in Λ0b→J/ψK−p decays are presented. The data sample corresponds to an integrated luminosity of ... -
Observation of Multiplicity Dependent Prompt χc1(3872) and ψ(2S) Production in pp Collisions
(Physical Review Letters, 2021, Vol. 126, 2021-03)The production of χc1(3872) and ψ(2S) hadrons is studied as a function of charged particle multiplicity in pp collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity ... -
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 ...