Visualitzant Articles publicats en revistes per títol
Ara mostrant els elements 353-372 de 538
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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 ... -
Observation of Overlapping Spin-1 and Spin-3 ¯D0K− Resonances at Mass 2.86 GeV/c2
(Physical Review Letters, 2014, Vol. 113, No. 16 (Octubre), 2014-10-14)The resonant substructure of B0s→¯D0K−π+ decays is studied using a data sample corresponding to an integrated luminosity of 3.0 fb−1 of pp collision data recorded by the LHCb detector. An excess at ... -
Observation of Photon Polarization in the b→sγ Transition
(Physical Review Letters, 2014, Vol. 112, No. 16 (Abril), 2014-04-22)This Letter presents a study of the flavor-changing neutral current radiative B±→K±π∓π±γ decays performed using data collected in proton-proton collisions with the LHCb detector at 7 and 8 TeV center-of-mass ... -
Observation of several sources of CP violation in B+ → π+ π+ π− decays
(Physical Review Letters, 2020, Vol.124, 031801, 2020-01)Observations are reported of different sources of CP violation from an amplitude analysis of B+→π+π+π− decays, based on a data sample corresponding to an integrated luminosity of 3 fb−1 of pp collisions ... -
Observation of the B0 s → J/ψ K0 SK±π ∓ decay
(Journal of High Energy Physics, 2014, No. 140, 2014-07)Decays of the form B0 (s) → J/ψ K0 S h +h (0)− (h (0) = K, π) are searched for in proton-proton collision data corresponding to an integrated luminosity of 1.0 fb−1 recorded with the LHCb detector. The ... -
Observation of the B0 → ρ0ρ0 decay from an amplitude analysis of B0 → (π+π−)(π+π−) decays
(Physics Letters B , 2015, Vol. 747, (Juliol), 2015-07-30) -
Observation of the B0s → D*±D∓ decay
(Journal of High Energy Physics, 2021, Vol.3, No. 99, 2021-03)A search for the B0s → D*±D∓ decay is performed using proton-proton collision data at centre-of-mass energies of 7, 8 and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity ... -
Observation of the B0s→η′η′ Decay
(Physical Review Letters, 2015, Vol. 115, No. 5 (Juliol), 2015-07-28)The first observation of the B0s→η′η′ decay is reported. The study is based on a sample of proton-proton collisions corresponding to 3.0 fb−1 of integrated luminosity collected with the LHCb detector. ...