Browsing Recerca by Subject "539"
Now showing items 141-160 of 236
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Measurements of CP violation in the three-body phase space of charmless B± decays
(Physical Review D, 2014, Vol. 90 , No. 11 (Desembre), 2014-12-11)The charmless three-body decay modes B± → K± π+π−, B± → K± K+ K−, B± → π± K+ K− and B± → π± π+ π− are reconstructed using data, corresponding to an integrated luminosity of 3.0 fb−1, collected by the ... -
Measurements of the B +, B 0, B0s meson and Λ0b baryon lifetimes
(Journal of High Energy Physics, 2014, Vol. 2014, No.a (Abril), 2014-04-16)Measurements of b-hadron lifetimes are reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using ... -
Measurements of the branching fractions of B+ → ppK¯ + decays
(The European Physical Journal C, 2013, Vol. 73, No. 2462, 2013-06)The branching fractions of the decay B+ → ppK¯ + for different intermediate states are measured using data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb experiment. The ... -
Measurements of the branching fractions of the decays B0s→D∓sK± and B0s→D−sπ+
(Journal of High Energy Physics, 2012, Vol. 2012, No.6 (Juny), 2012-06-20)The decay mode B0s→D∓sK± allows for one of the theoretically cleanest measurements of the CKM angle γ through the study of time-dependent CP violation. This paper reports a measurement of its branching ... -
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 ... -
Model-independent search for CP violation in D0→K-K+π-π+ and D0→π-π+π+π- decays
(Physics Letters B , 2013, Vol. 726, No.4-5 (Novembre), 2013-11-04)A search for CP violation in the phase-space structures of D0 and D0bar decays to the final states K-K+pi-pi+ and pi-pi+pi+pi- is presented. The search is carried out with a data set corresponding to ... -
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 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 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 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 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 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 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 ...