Listando Recerca por materia "539"
Mostrando ítems 61-80 de 236
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Low noise front end ICECAL ASIC for the upgrade of the LHCb calorimeter
(Journal of Instrumentation, 2012, Vol. 7, No.1 (Gener), 2012-01-23)A fully differential ASIC with cooled input termination is presented as a solution for the Upgrade of the Calorimeter front end electronics. The LHCb experiment needs to increase about ten times the ... -
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-hadron branching fractions fortwo-body decays into charmless charged hadrons
(Journal of High Energy Physics, 2012, Vol. 2012, No.10 (Octubre), 2012-10-04)Based on data corresponding to an integrated luminosity of 0.37 fb−1 collected by the LHCb experiment in 2011, the following ratios of branching fractions are measured: $ B(B0→π+π−)/B(B0→K+π−)=0.262±0 ... -
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 asymmetry in B 0 s → D ∓ s K ± decays
(Journal of High Energy Physics, 2014, Vol. 2014, No.11 (Novembre), 2014-11-13)We report on measurements of the time-dependent CP violating observables in B 0 s → D ∓ s K ± decays using a dataset corresponding to 1.0 fb−1 of pp collisions recorded with the LHCb detector. We find ... -
Measurement of CP asymmetry in D0 → K−K+ and D0 → π −π + decays
(Journal of High Energy Physics, 2014, No. 41, 2014-07)Time-integrated CP asymmetries in D0 decays to the final states K−K+ and π −π + are measured using proton-proton collisions corresponding to 3 fb−1 of integrated luminosity collected at centre-of-mass ... -
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 ... -
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 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-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 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 ...