Visualitzant Articles publicats en revistes per matèria "53"
Ara mostrant els elements 1-20 de 93
-
A comprehensive sounding of the ionospheric HF radio link from Antarctica to Spain
(Radio Science, 2013. Vol.48, 1, Gener - Febrer, 2013-01)Since 2003, our group has been investigating the performance of different transmission techniques for low-power low-interference High Frequency (HF) ionospheric communication systems. Specifically, we ... -
A study of CP violation in B±→DK± and B±→Dπ± decays with D→K0SK±π∓ final states
(Physics Letters B , 2014, Vol. 733 (Juny), 2014-06-02)A first study of CP violation in the decay modes B±→[K0SK±π∓]Dh± and B±→[K0SK∓π±]Dh±, where h labels a K or π meson and D labels a D0 or D⎯⎯⎯0 meson, is performed. The analysis uses the LHCb data set ... -
Acoustic Comfort Prediction: Integrating Sound Event Detection and Noise Levels from a Wireless Acoustic Sensor Network
(Sensors, 2024-07-07)There is an increasing interest in accurately evaluating urban soundscapes to reflect citizens’ subjective perceptions of acoustic comfort. Various indices have been proposed in the literature to achieve ... -
Amplitude analysis and branching fraction measurement of ¯Bos → J/ψ K+K−
(Physical Review D, 2013, Vol. 87 , No.7 (Abril), 2013-04-08)An amplitude analysis of the final state structure in the ¯¯¯B0s→J/ψK+K− decay mode is performed using 1.0 fb−1 of data collected by the LHCb experiment in 7 TeV center-of-mass energy pp collisions ... -
An example of operation for a partly manned Antarctic geomagnetic observatory and the development of a radio link for data transmission
(Annals of Geophysics, 2009. Vol. 52, 1 (Febrer), 2009-02)The experience acquired from more than ten years of operation of an Antarctic geomagnetic observatory is described along with the development of data transmission facilities. The observatory was deployed ... -
Analysis of the resonant components in ¯B0s → J/ψ π+ π−
(Physical Review D, 2012, Vol. 86 , No.5 (Setembre), 2012-09-17)The decay ¯¯¯B0s→J/ψπ+π− can be exploited to study CP violation. A detailed understanding of its structure is imperative in order to optimize its usefulness. An analysis of this three-body final state ... -
Controlling chaotic oscillations in a symmetric two-mass model of the vocal folds
(Chaos, Solitons & Fractals, Vol. 159 , 2022 (juny), 2022-06)Human phonation is a highly non-linear process in which subglottal flow emanating from the lungs induces self-oscillations of the vocal folds. In normal conditions, this results in the generation of a ... -
Determination of fs/fd for 7 TeV pp Collisions and Measurement of the B0→D−K+ Branching Fraction
(Physical Review Letters, 2011, Vol. 107, No. 21 (Novembre), 2011-11-14)The relative abundance of the three decay modes B0→D−K+, B0→D−π+, and B0s→D−sπ+ produced in 7 TeV pp collisions at the LHC is determined from data corresponding to an integrated luminosity of 35 pb−1. ... -
Determination of the Sign of the Decay Width Difference in the B0s System
(Physical Review Letters, 2012, Vol. 108, No. 24 (Juny), 2012-06-11)The interference between the K+K− S-wave and P-wave amplitudes in B0s→J/ψK+K− decays with the K+K− pairs in the region around the ϕ(1020) resonance is used to determine the variation of the difference ... -
Determination of the X(3872) Meson Quantum Numbers
(Physical Review Letters, 2013, Vol. 110, No. 22 (Maig), 2013-05-29)The quantum numbers of the X(3872) meson are determined to be JPC=1++ based on angular correlations in B+→X(3872)K+ decays, where X(3872)→π+π−J/ψ and J/ψ→μ+μ−. The data correspond to 1.0 fb−1 of pp ... -
Determination of γ and −2βs from charmless two-body decays of beauty mesons
(Physics Letters B , 2015, Vol. 741 (Febrer), 2015-02-04)Using the latest LHCb measurements of time-dependent CP violation in the B-s(0) -> K+K- decay, a U-spin relation between the decay amplitudes of B-s(0) -> K+K- and B-0 -> p(+)p(-) decay processes allows ... -
Differential Branching Fraction and Angular Analysis of the Decay B0 → K*0 μ+ μ−
(Physical Review Letters, 2012, Vol. 108, No. 18 (Maig), 2012-05-03)The angular distributions and the partial branching fraction of the decay B0→K*0μ+μ− are studied by using an integrated luminosity of 0.37 fb−1 of data collected with the LHCb detector. The forward-backward ... -
Evidence for CP Violation in B+→p¯pK+ Decays
(Physical Review Letters, 2014, Vol. 113, No. 14 (Octubre), 2014-09-20)Three-body B+→p¯pK+ and B+→p¯pπ+ decays are studied using a data sample corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment in proton-proton collisions at center-of-mass ... -
Evidence for CP Violation in Time-Integrated D0→h−h+ Decay Rates
(Physical Review Letters, 2012, Vol. 108, No. 11 (Març), 2012-03-12)A search for time-integrated CP violation in D0→h−h+ (h=K, π) decays is presented using 0.62 fb−1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the ... -
Evidence for the Strangeness-Changing Weak Decay Ξ−b→Λ0bπ−
(Physical Review Letters, 2015, Vol. 115, No. 24 (Desembre), 2015-12-11)Using a pp collision data sample corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb detector, we present the first search for the strangeness-changing weak decay Ξ−b→Λ0bπ−. ... -
Finite element hybrid and direct computational aeroacoustics at low Mach numbers in slow time-dependent domains
(Computers & Fluids, 2022, Vol. 239 (Maig), 2022-05-15)In this work, we address the finite element computation of flow noise in the presence of arbitrarily slowly moving rigid bodies at low Mach numbers, by means of hybrid and direct computational aeroacoustics ... -
First Evidence for the Decay B0s→μ+μ−
(Physical Review Letters, 2013, Vol. 110, No. 2 (Gener), 2013-01-07)A search for the rare decays B0s→μ+μ− and B0→μ+μ− is performed with data collected in 2011 and 2012 with the LHCb experiment at the Large Hadron Collider. The data samples comprise 1.1 fb−1 of proton-proton ... -
First Measurement of the Charge Asymmetry in Beauty-Quark Pair Production
(Physical Review Letters, 2014, Vol. 113, No. 8 (Agosto), 2014-08-20)The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in b¯b pair production at a hadron collider. The ... -
First Measurement of the CP-Violating Phase in B0s→ϕϕ Decays
(Physical Review Letters, 2013, Vol. 110, No. 24 (Juny), 2013-06-12)A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B0s→ϕϕ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the ... -
First Observation of a Baryonic B+c Decay
(Physical Review Letters, 2014, Vol. 113, No. 15 (Octubre), 2014-10-10)A baryonic decay of the B+c meson, B+c→J/ψp¯pπ+, is observed for the first time, with a significance of 7.3 standard deviations, in pp collision data collected with the LHCb detector and corresponding ...