Visualitzant La Salle per matèria "Col·lisions (Física nuclear)"
Ara mostrant els elements 41-60 de 219
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First observation of ¯¯¯B0→J/ψK+K− and search for ¯¯¯B0→J/ψϕ decays
(Physical Review D, 2013, Vol. 88 , No.7 (Octubre), 2013-10-14)The first observation of the ¯¯¯B0→J/ψK+K− decay is presented with a data sample corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions at a center-of-mass energy of 7 TeV collected ... -
Flavour Tagging at LHCb
(2012-06)The identification of the flavour of reconstructed Bd and Bs mesons at production is necessary for the measurements of oscillations and time-dependent CP asymmetries. The calibration and performance of ... -
Forward production of Υ mesons in pp collisions at s√=7 and 8 TeV
(Journal of High Energy Physics, 2015, Vol. 2015, No.11 (Novembre), 2015-11-16)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 ... -
Identification of beauty and charm quark jets at LHCb
(Journal of Instrumentation, 2015, Vol. 10, 2015-06)Identification of jets originating from beauty and charm quarks is important for measuring Standard Model processes and for searching for new physics. The performance of algorithms developed to select ... -
Implications of LHCb measurements and future prospects
(The European Physical Journal C, 2013, Vol. 73, no. 4 (Abril), 2013-04-26)During 2011 the LHCb experiment at CERN collected 1.0 fb−1 of s√=7~TeV pp collisions. Due to the large heavy quark production cross-sections, these data provide unprecedented samples of heavy flavoured ... -
LHCb detector performance
(International Journal of Modern Physics A, 2015, Vol. 30, No. 7, 2015-03)The LHCb detector is a forward spectrometer at the Large Hadron Collider (LHC) at CERN. The experiment is designed for precision measurements of CP violation and rare decays of beauty and charm hadrons. ... -
Limits on neutral Higgs boson production in the forward region in pp collisions at s√=7 TeV
(Journal of High Energy Physics, 2013, Vol. 2013, No.5 (Maig), 2013-05-27)Limits on the cross-section times branching fraction for neutral Higgs bosons, produced in pp collisions at s√=7 TeV, and decaying to two tau leptons with pseudorapidities between 2.0 and 4.5, are ... -
Measurement of Ξ++cc production in pp collisions at √s= 13TeV
(Chinese Physics C, 2020, Vol. 44, no 2, 2020-02)The production of $\varXi _{cc}^ {++}$ baryons in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13\;{\rm{TeV}}$ is measured in the transverse-momentum range $4 \lt p_{\rm{T}} \lt ... -
Measurement of b hadron production fractions in 7 TeV pp collisions
(Physiccal Review D , 2012, Vol. 85, No.3 (Febrer), 2012-02-24)Measurements of b hadron production ratios in proton-proton collisions at a center-of-mass energy of 7 TeV with an integrated luminosity of 3 pb−1 are presented. We study the ratios of strange B meson ... -
Measurement of B+c Production in Proton-Proton Collisions at √s=8 TeV
(Physical Review Letters, 2015, Vol. 114, No. 13 (Abril), 2015-04-02)Production of B+c mesons in proton-proton collisions at a center-of-mass energy of 8 TeV is studied with data corresponding to an integrated luminosity of 2.0 fb−1 recorded by the LHCb experiment. The ... -
Measurement of b-hadron masses
(Physics Letters B , 2012, Vol. 708, No. 3 -5 (Febrer), 2012-02-28)Measurements of b-hadron masses are performed with the exclusive decay modes B+ -> J/psi K+, B0 -> J/psi K*0, B0 -> J/psi K0S, B0_s -> J/psi phi and Lambda_b -> J/psi Lambda using an integrated luminosity ... -
Measurement of charged particle multiplicities and densities in pp collisions at s√=7TeV in the forward region
(The European Physical Journal C, 2014. Vol. 74, No. 5 (Maig), 2014-05-24)Charged particle multiplicities are studied in proton–proton collisions in the forward region at a centre-of-mass energy of s√=7TeV with data collected by the LHCb detector. The forward spectrometer ... -
Measurement of CP asymmetries and polarisation fractions in B0s→K∗0K¯¯¯¯¯∗0 decays
(Journal of High Energy Physics, 2015, Vol. 2015, No.7 (Juliol), 2015-07-30)An angular analysis of the decay B0s→K∗0K¯¯¯¯¯∗0 is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment at a centre-of-mass energy s√=7 ... -
Measurement of CP asymmetries in the decays B 0 → K *0 μ + μ − and B + → K + μ + μ −
(Journal of High Energy Physics, 2014, Vol. 2014, No.9 (Setembre), 2014-09-30)The direct CP asymmetries of the decays B 0 → K *0 μ + μ − and B + → K + μ + μ − are measured using pp collision data corresponding to an integrated luminosity of 3.0 fb−1 collected with the LHCb detector. ... -
Measurement of CP observables in B 0 → DK ∗0 with D →K + K −
(Journal of High Energy Physics, 2013, Vol. 2013, No.3 (Març), 2013-03-12)The decay B 0 → DK *0 and the charge conjugate mode are studied using 1.0 fb−1 of pp collision data collected by the LHCb experiment at s√=7 TeV in 2011. The CP asymmetry between the B 0 → DK *0 and the ... -
Measurement of CP observables in B± → DK± and B± → Dπ± with D → K0SK±π∓ decays
(Journal of High Energy Physics, 2020, 58, 2020-05)Measurements of CP observables in B± → DK± and B± → Dπ± decays are presented, where D represents a superposition of D0 and D¯¯¯¯0 states. The D meson is reconstructed in the three-body final states ... -
Measurement of CP violation and constraints on the CKM angle γ in B±→DK±with D→K0S π+π− decays
(Nuclear Physics B, 2014, Vol. 888, 2014-11)A model-dependent amplitude analysis of B± → DK± with D → KS0π+π− decays is performed using proton–proton collision data, corresponding to an integrated luminosity of 1fb−1, recorded by LHCb at a ... -
Measurement of CP violation and the B0s meson decay width difference with B0s→J/ψK+K− and B0s→J/ψπ+π− decays
(Physical Review D, 2013, Vol. 87 , No.11 (Juny), 2013-06-21)The time-dependent CP asymmetry in B0s→J/ψK+K− decays is measured using pp collision data at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector. The ... -
Measurement of CP violation in B0s → ϕϕ decays
(Physical Review D, 2014, Vol. 90 , No.5 (Setembre), 2014-09-30)A measurement of the decay time-dependent CP-violating asymmetry in B0s→ϕϕ decays is presented, along with measurements of the T-odd triple-product asymmetries. In this decay channel, the CP-violating ... -
Measurement of CP violation in B0→ D∗±D∓ decays
(Journal of High Energy Physics, 2020, 147, 2020-02)The decay-time-dependent CP asymmetry in B0→ D∗±D∓ decays is mea- sured using a data set corresponding to an integrated luminosity of 9 fb−1 recorded by the LHCb detector in proton-proton collisions at ...