Browsing La Salle by Title
Now showing items 349-368 of 737
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Measurement of CP Violation in the Decay B+→K+π0
(Physical Review Letters, 2021, Vol. 126, 2021-03)A measurement of CP violation in the decay B+→K+π0 is reported using data corresponding to an integrated luminosity of 5.4 fb−1 collected with the LHCb experiment at a center-of-mass energy of √s=13 TeV. ... -
Measurement of CP Violation in the Phase Space of B±→K±π+π− and B±→K±K+K− Decays
(Physical Review Letters, 2013, Vol. 111, No. 10 (Setembre), 2013-09-03)The charmless decays B±→K±π+π− and B±→K±K+K− are reconstructed using data, corresponding to an integrated luminosity of 1.0 fb−1, collected by LHCb in 2011. The inclusive charge asymmetries of these ... -
Measurement of CP violation parameters and polarisation fractions in B0s→J/ψK¯¯¯¯∗0 decays
(Journal of High Energy Physics, 2015, Vol. 2015, No.11 (Novembre), 2015-11-12)The first measurement of CP asymmetries in the decay B0s→J/ψK¯¯¯¯∗(892)0 and an updated measurement of its branching fraction and polarisation fractions are presented. The results are obtained using ... -
Measurement of CP violation parameters in B0 → DK*0 decays
(Physical Review D, 2014, Vol. 90 , No. 11 (Desembre), 2014-12-02)An analysis of B0→DK*0 decays is presented, where D represents an admixture of D0 and ¯D0 mesons reconstructed in four separate final states: K−π+, π−K+, K+K− and π+π−. The data sample corresponds to ... -
Measurement of CP-Averaged Observables in the B0→K*0μ+μ− Decay
(Physical Review Letters, 2020, Vol.125, 011802, 2020-07)An angular analysis of the B0→K*0(→K+π−)μ+μ− decay is presented using a dataset corresponding to an integrated luminosity of 4.7 fb−1 of pp collision data collected with the LHCb experiment. The full ... -
Measurement of D0–¯¯¯D0 Mixing Parameters and Search for CP Violation Using D0→K+π− Decays
(Physical Review Letters, 2013, Vol. 111, No. 25 (Desembre), 2013-12-18)Measurements of charm mixing parameters from the decay-time-dependent ratio of D0→K+π− to D0→K−π+ rates and the charge-conjugate ratio are reported. The analysis uses data, corresponding to 3 fb−1 of ... -
Measurement of differential b¯b- and cc¯-dijet cross-sections in the forward region of pp collisions at √s = 13 TeV
(Journal of High Energy Physics, 2021, No. 23, 2021-02)The inclusive b ¯b- and cc¯-dijet production cross-sections in the forward region of pp collisions are measured using a data sample collected with the LHCb detector at a centre-of-mass energy of 13 TeV ... -
Measurement of forward J/ψ production cross-sections in pp collisions at s√=13 TeV
(Journal of High Energy Physics, 2015, Vol. 2015, No.10 (Octubre), 2015-10-26)The production of J/ψ mesons in proton-proton collisions at a centre-of-mass energy of s√=13 TeV is studied with the LHCb detector. Cross-section measurements are performed as a function of the transverse ... -
Measurement of forward Z → e+e− production at s√=8 TeV
(Journal of High Energy Physics, 2015, Vol. 2015, No.109 (Maig), 2015-05-21)A measurement of the cross-section for Z-boson production in the forward region of pp collisions at 8 TeV centre-of-mass energy is presented. The measurement is based on a sample of Z → e+e− decays ... -
Measurement of fs/fu Variation with Proton-Proton Collision Energy and B-Meson Kinematics
(Physical Review Letters, 2020, Vol.124, 122002, 2020-03)The ratio of the B0s and B+ fragmentation fractions fs and fu is studied with B0s→J/ψϕ and B+→J/ψK+ decays using data collected by the LHCb experiment in proton-proton collisions at 7, 8, and 13 TeV ... -
Measurement of indirect CP asymmetries in D0 → K−K+ and D0 → π −π + decays using semileptonic B decays
(Journal of High Energy Physics, 2015, No. 43, 2015-04)Time-dependent CP asymmetries in the decay rates of the singly Cabibbosuppressed decays D0 → K−K+ and D0 → π −π + are measured in pp collision data corresponding to an integrated luminosity of 3.0 ... -
Measurement of J/ψ polarization in pp collisions at s√=7 TeV
(The European Physical Journal C, 2013, Vol. 73, no. 11 (Novembre), 2013-11-09)An angular analysis of the decay J/ψ→μ + μ − is performed to measure the polarization of prompt J/ψ mesons produced in pp collisions at s√=7 TeV. The dataset corresponds to an integrated luminosity of ... -
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 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 ... -
Measurement of mixing and CP violation parameters in two-body charm decays
(Journal of High Energy Physics, 2012, Vol. 2012, No.4 (Abril), 2012-04-27)A study of mixing and indirect CP violation in D 0 mesons through the determination of the parameters y CP and A Γ is presented. The parameter y CP is the deviation from unity of the ratio of effective ... -
Measurement of polarization amplitudes and CP asymmetries in B 0 → ϕK *(892)0
(Journal of High Energy Physics, 2014, Vol. 2014, No.5 (Maig), 2014-05-16)An angular analysis of the decay B 0 → ϕK *(892)0 is reported based on a pp collision data sample, corresponding to an integrated luminosity of 1.0 fb−1, collected at a centre-of-mass energy of s√ = 7 ... -
Measurement of prompt hadron production ratios in pp collisions at s√=0.9 and 7 TeV
(The European Physical Journal C, 2012, Vol. 72, no. 8 (Agost), 2012-08-16)All underlying interactions responsible for pp collisions at the Large Hadron Collider (LHC) and the subsequent hadronisation process can be understood within the context of quantum chromodynamics (QCD). ... -
Measurement of relative branching fractions of B decays to ψ(2S) and J/ψ mesons
(The European Physical Journal C, 2012, Vol. 72, No. 2118, 2012-08)The relative rates of B-meson decays into J/ψ and ψ(2S) mesons are measured for the three decay modes in pp collisions recorded with the LHCb detector. The ratios of branching fractions (B) are measured ... -
Measurement of resonant and CP components in ¯B0s→J/ψπ+π− decays
(Physical Review D, 2014, Vol. 89 , No.9 (Maig), 2014-05-14)Structure of the decay ¯B0s→J/ψπ+π− is studied using data corresponding to 3 fb−1 of integrated luminosity from pp collisions produced by the LHC and collected by the LHCb detector. Five interfering ... -
Measurement of sigma(pp -> b anti-b X) at sqrt(s)=7 TeV in the forward region
(Physics Letters B, Vol. 694, No. 3 (Novembre 2010), 2010)Decays of b hadrons into final states containing a Dº meson and a muon are used to measure the bb production cross-section in proton–proton collisions at a centre-of-mass energy of 7 TeV at the LHC. In ...