Articles publicats en revistes: Enviaments recents
Ara mostrant els elements 161-180 de 538
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Observation of Two New Ξ−b Baryon Resonances
(Physical Review Letters , 2015, Vol. 114, No. 6 (Febrer), 2015-02-10)Two structures are observed close to the kinematic threshold in the Ξ0bπ− mass spectrum in a sample of proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb−1, recorded by ... -
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 ... -
Effective lifetime measurements in the B0s → K+K− , B0 → K+π− and B0s → π+K− decays
(Physics Letters B , 2014, Vol. 736 (Setembre), 2014-09-07)Measurements of the effective lifetimes in the B0s→K+K−, B0→K+π− and B0s→π+K− decays are presented using 1.0 fb−1 of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. ... -
Measurement of the B 0 → K ∗0 e + e − branching fraction at low dilepton mass
(Journal of High Energy Physics, 2013, Vol. 2013, No.5 (Maig), 2013-05-29)The branching fraction of the rare decay B 0 → K ∗0 e + e − in the dilepton mass region from 30 to 1000 MeV/c 2 has been measured by the LHCb experiment, using pp collision data, corresponding to an ... -
First observation of the decay B0s→ϕK¯¯¯¯¯∗0
(Journal of High Energy Physics, 2013, Vol. 2013, No.10 (Octubre), 2013-10-28)The first observation of the decay B0s→ϕK¯¯¯¯¯∗0 is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions at s√=7 TeV, collected with ... -
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 ... -
Measurement of the Λ0b → J/ψΛ angular distribution angular distribution and the Λ0b polarisation in pp collisions
(Journal of High Energy Physics, 2020, 110, 2020-06-17)This paper presents an analysis of the Λ0b→ J/ψΛ angular distribution and the transverse production polarisation of Λ0b baryons in proton-proton collisions at centre-of-mass energies of 7, 8 and 13 TeV. ... -
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, ... -
Sensing System for Remote Areas in Antarctica
(Radio Science, 2020, Vol.55 No 3, 2020-02)Every year, the number of Internet of Things devices is growing exponentially. The current Internet of Things technology to support the connectivity of such a huge number of devices is limited by the ... -
A Heuristic to Create Prosumer Community Groups in the Social Internet of Energy
(Sensors, 2020, Vol. 20 No 13, 2020-07)Contrary to the rapid evolution experienced in the last decade of Information andCommunication Technologies and particularly the Internet of Things, electric power distributionsystems have ... -
An Educational Approach for Present and Future of Digital Transformation in Portuguese Organizations
(Applied Sciences, 2020, 10(3), 757;, 2020-01)The current technological evolution allows us to easily and quickly obtain more information, computing capacity, ommunication and connectivity, in addition to allowing new forms of collaboration between ... -
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 ... -
Measurement of the χ b (3P) mass and of the relative rate of χ b1(1P) and χ b2(1P) production
(Journal of High Energy Physics, 2014, Vol. 2014, No.10 (Octubre), 2014-10-14)The production of χ b mesons in proton-proton collisions is studied using a data sample collected by the LHCb detector, at centre-of-mass energies of s√ =7 and 8 TeV and corresponding to an integrated ... -
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 ... -
Observation of the Λ 0 b → J/ψ pπ − decay
(Journal of High Energy Physics, 2014, Vol. 2014, No.7 (Juliol), 2014-07-22)The first observation of the Cabibbo-suppressed decay Λ 0 b → J/ψpπ − is reported using a data sample of proton-proton collisions at 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. A ... -
Measurement of the fraction of Υ (1S) originating from χb (1P) decays in pp collisions at√s= 7 TeV
(Journal of High Energy Physics, 2012, Vol. 2012, No. 11 (Novembre), 2012-11-08)The production of χb(1P ) mesons in pp collisions at a centre-of-mass energy of 7 TeV is studied using 32 pb−1 of data collected with the LHCb detector. The χb(1P ) mesons are reconstructed in the decay ... -
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 the cross-section for Z → e+e- production in pp collisions at s√=7 TeV
(Journal of High Energy Physics, 2013, Vol. 2013, No.2 (Febrer), 2013-02-19)A measurement of the cross-section for pp → Z → e+e− is presented using data at s√=7 TeV corresponding to an integrated luminosity of 0.94 fb−1. The process is measured within the kinematic acceptance ... -
Differential branching fraction and angular analysis of the decay B0s → ϕμ + μ −
(Journal of High Energy Physics, 2013, Vol. 2013, No.7 (Juliol), 2013-07-11)The determination of the differential branching fraction and the first angular analysis of the decay B0s → ϕμ + μ − are presented using data, corresponding to an integrated luminosity of 1.0 fb−1, ... -
Time alignment of the front end electronics of the LHCb calorimeters
(Journal of Instrumentation, 2012, Vol. 7, No.8 (Agost), 2012-08-21)LHCb is the experiment at the Large Hadron Collider at CERN designed for performing studies of CP-symmetry violation and rare decays of B-hadrons. Its calorimeter system allows to trigger on photons and ...