Browsing Física de Partículas by Subject "QCD"
Now showing items 1-20 of 27
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Bose-Einstein correlations of same-sign charged pions in the forward region in pp collisions at √s=7 TeV
(Springer, 2017)Bose-Einstein correlations of same-sign charged pions, produced in proton-proton collisions at a 7 TeV centre-of-mass energy, are studied using a data sample collected by the LHCb experiment. The signature for Bose-Einstein ... -
Centrality dependence of inclusive J/ψ production in p-Pb collisions at √sNN =5.02 TeV
(Springer, 2015)We present a measurement of inclusive J=ψ production in p-Pb collisions at √ sNN = 5:02TeV as a function of the centrality of the collision, as estimated from the energy deposited in the Zero Degree Calorimeters. The ... -
Evidence for the decay B+c→J/ψ3π+2π−
(Springer, 2014)Evidence is presented for the decay B + c → J/ψ3π +2π − using proton-proton collision data, corresponding to an integrated luminosity of 3 fb−1 , collected with the LHCb detector. A signal yield of 32 ± 8 decays is ... -
Forward production of Υ mesons in pp collisions at √s=7 and 8 TeV
(Springer, 2015)The production of Υ mesons in pp collisions at √s=7 and 8 TeV is studied with the LHCb detector using data samples corresponding to an integrated luminosity of 1 fb−1 and 2 fb−1 respectively. The production cross-sections ... -
KLWMIJ Reggeon field theory beyond the large Nc limit
(Springer, 2014)We extend the analysis of KLWMIJ evolution in terms of QCD Reggeon fields beyond leading order in the 1/Nc expansion. We show that there is only one type of corrections to the leading order Hamiltonian discussed in [1]. ... -
Measurement of D ±s production asymmetry in pp collisions at √s=7 and 8 TeV
(Springer, 2018)The inclusive D ±s production asymmetry is measured in pp collisions collected by the LHCb experiment at centre-of-mass energies of √s=7 and 8 TeV. Promptly produced D ±s mesons are used, which decay as D ±s → ϕπ±, with ... -
Measurement of forward top pair production in the dilepton channel in pp collisions at √s=13 TeV
(Springer, 2018)Forward top quark pair production is studied in pp collisions in the μeb final state using a data sample corresponding to an integrated luminosity of 1.93 fb−1 collected with the LHCb experiment at a centre-of-mass energy ... -
Measurement of forward W and Z boson production in association with jets in proton-proton collisions at √s=8 TeV
(Springer, 2016)The production of W and Z bosons in association with jets is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 TeV by the LHCb experiment, corresponding to an integrated ... -
Measurement of forward W → eν production in pp collisions at √s=8 TeV
(Springer, 2016)A measurement of the cross-section for W → eν production in pp collisions is presented using data corresponding to an integrated luminosity of 2 fb−1 collected by the LHCb experiment at a centre-of-mass energy of √s=8 TeV. ... -
Measurement of forward Z → e+e− production s√s=8 TeV
(Springer, 2015)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 reconstructed using the ... -
Measurement of the forward W boson cross-section in pp collisions at √s=7 TeV
(Springer, 2014)A measurement of the inclusive W → μν production cross-section using data from pp collisions at a centre-of-mass energy of √s=7 TeV is presented. The analysis is based on an integrated luminosity of about 1.0 fb−1 recorded ... -
Measurement of the forward Z boson production cross-section in pp collisions at √s =7 TeV
(Springer, 2015)A measurement of the production cross-section for Z bosons that decay to muons is presented. The data were recorded by the LHCb detector during pp collisions at a centre-of-mass energy of 7 TeV, and correspond to an ... -
Measurement of the J/ψ pair production cross-section in pp collisions at √s=13 TeV
(Springer, 2017)The production cross-section of J/ψ pairs is measured using a data sample of pp collisions collected by the LHCb experiment at a centre-of-mass energy of √s=13 TeV, corresponding to an integrated luminosity of 279 ±11 pb−1. ... -
Measurement of the ratio of branching fractions B(B+c→J/ψK+)/B(B+c→J/ψπ+)
(Springer, 2016)The ratio of branching fractions RK/π≡B(B+c→J/ψK+)/B(B+c→J/ψπ+) is measured with pp collision data collected by the LHCb experiment at centre-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity ... -
Measurement of the Y(nS) polarizations in pp collisions at √s=7 and 8 TeV
(Springer, 2017)The polarization of the Y(1S), Y(2S) and Y(3S) mesons, produced in pp collisions at centre-of-mass energies √s=7 and 8 TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated ... -
Measurement of ϒ production in pp collisions at √s=13 TeV
(Springer, 2018)The production cross-sections of ϒ(1S), ϒ(2S) and ϒ(3S) mesons in proton-proton collisions at √s=13 TeV are measured with a data sample corresponding to an integrated luminosity of 277 ± 11 pb−1 recorded by the LHCb ... -
Measurements of prompt charm production cross-sections in pp collisions at √s=5 TeV
(Springer, 2017)Production cross-sections of prompt charm mesons are measured using data from pp collisions at the LHC at a centre-of-mass energy of 5 TeV. The data sample corresponds to an integrated luminosity of 8.60 ± 0.33 pb−1 collected ... -
Next-to-next-to-eikonal corrections in the CGC
(Springer, 2016)We extend the study of corrections to the eikonal approximation that was initiated in ref. [1] to higher orders. These corrections associated with the finite width of the target are investigated and the gluon propagator ... -
PDF reweighting in the Hessian matrix approach
(Springer, 2014)We introduce the Hessian reweighting of parton distribution functions (PDFs). Similarly to the better-known Bayesian methods, its purpose is to address the compatibil- ity of new data and the quantitative modifications ... -
Precise measurements of the properties of the B1(5721)0,+ and B *2(5747)0,+ states and observation of B+,0π−,+ mass structures
(Springer, 2015)Invariant mass distributions of B+π− and B0π+ combinations are investigated in order to study excited B mesons. The analysis is based on a data sample corresponding to 3.0 fb−1 of pp collision data, recorded by the LHCb ...