Visualitzant La Salle per autor/a "Abellan Beteta, Carlos"
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Evidence for the decay B0 → J/ψω and measurementof the relative branching fractions of B0s meson decays to J/ψη and J/ψη′
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Domingo Bonal, Francesc; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Nuclear Physics B, 2012, Vol. 867, No. 3, 2012-10)First evidence of the B0→J/ψω decay is found and the B0s→J/ψη and B0s→J/ψη′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experimentin ... -
Exclusive J/ψ and ψ(2S) production in pp collisions at √s= 7 TeV
Abellan Beteta, Carlos; Domingo Bonal, Francesc; Camboni, Alessandro; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of Physics G-Nuclear and Particle Physics, 2013, Vol. 40, No. 4, 2013-02)Exclusive J/ψ and ψ(2S) vector meson production has been observed in the dimuon channel using the LHCb detector. The cross-section times branching fractions to two muons with pseudorapidities between ... -
Framework TDR for the LHCb Upgrade: Technical Design Report
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Domingo Bonal, Francesc; Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (2012-03-25)This document is a Framework Technical Design Report for the upgrade of the LHCb experiment. It adds to the information in the Letter of Intent, in particular concerning the foreseen schedule, cost and ... -
Implications of LHCb measurements and future prospects
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (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 ... -
Integrated test environment for a part of the LHCb calorimeter
Abellan Beteta, Carlos; Roselló Canal, Mar; Gaspar de Valenzuela, Álvaro; Riera Baburés, Jordi; Gascón, D.; Picatoste, E.; Comerma, A.; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Proceedings of the Topical Workshop on Electronics for Particle Physics, 2009-09)An integrated test environment for the data acquisition electronics of the Scintillator Pad Detector (SPD) from the calorimeter of the LHCb experiment is presented. It allows to test ... -
Low noise front end ICECAL ASIC for the upgrade of the LHCb calorimeter
Abellan Beteta, Carlos; Vilasís Cardona, Xavier (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 J/ψ polarization in pp collisions at s√=7 TeV
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2013, Vol. 73, no. 11 (Novembre), 2013-11-09)An angular analysis of the decay J/ψ→μ + μ − is performed to measure the polarization of prompt J/ψ mesons produced in pp collisions at s√=7 TeV. The dataset corresponds to an integrated luminosity of ... -
Measurement of prompt hadron production ratios in pp collisions at s√=0.9 and 7 TeV
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2012, Vol. 72, no. 8 (Agost), 2012-08-16)All underlying interactions responsible for pp collisions at the Large Hadron Collider (LHC) and the subsequent hadronisation process can be understood within the context of quantum chromodynamics (QCD). ... -
Measurement of relative branching fractions of B decays to ψ(2S) and J/ψ mesons
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Domingo Bonal, Francesc; Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2012, Vol. 72, No. 2118, 2012-08)The relative rates of B-meson decays into J/ψ and ψ(2S) mesons are measured for the three decay modes in pp collisions recorded with the LHCb detector. The ratios of branching fractions (B) are measured ... -
Measurement of the B0–B0 oscillation frequency md with the decays B0→D−π+ and B0→J/ψK∗0
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Domingo Bonal, Francesc; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Letters B, Vol. 719, 2013-01)The B0–B0oscillation frequency mdis measured by the LHCb experiment using a dataset correspondingto an integrated luminosity of 1.0fb−1of proton–proton collisions at√s=7TeV,and is found to be ... -
Measurement of the effective B0s→J/ψK0S lifetime
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Nuclear Physics B, 2013, Vol. 873, No. 2, 2013-08)This paper reports the first measurement of the effective B0s→J/ψK0S lifetime and an updated mea-surement of its time-integrated branching fraction. Both measurements are performed with a data sample, ... -
Measurement of the forward energy flow in pp collisions at √s = 7 TeV
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Domingo Bonal, Francesc; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2013, Vol. 73, No. 2421, 2013-05)The energy flow created in pp collisions at √s = 7 TeV is studied within the pseudorapidity range 1.9 <η< 4.9 with data collected by the LHCb experiment. The measurements are performed for inclusive ... -
Measurement of the ratio of branching fractions B(B0 → K∗0γ )/B(B0 s → φγ ) and the direct CP asymmetry in B0 → K∗0γ
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Domingo Bonal, Francesc; Roselló Canal, Mar; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Nuclear Physics B, 2012, Vol. 867, 2012-09)The ratio of branching fractions of the radiative B decays B0→K∗0γ andB0s→φγ has been measured using an integrated luminosity of 1.0 fb−1 of pp collision data collected by the LHCb experiment at a ... -
Measurement of ψ(2S) meson production in pp collisions at s√=7 TeV
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Domingo Bonal, Francesc; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2012, Vol. 72, No. 2100, 2012-08)The differential cross-section for the inclusive production of ψ(2S) mesons in pp collisions at √s = 7 TeV has been measured with the LHCb detector. The data sample corresponds to an integrated luminosity ... -
Measurements of the branching fractions of B+ → ppK¯ + decays
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Domingo Bonal, Francesc; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2013, Vol. 73, No. 2462, 2013-06)The branching fractions of the decay B+ → ppK¯ + for different intermediate states are measured using data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb experiment. The ... -
Observations of B0 s → ψ(2S)η and B0 (s) → ψ(2S)π+π− decays
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Nuclear Physics B, 2013, Vol. 871, No. 3, 2013-06)First observations of the B0s→ψ(2S)η,B0→ψ(2S)π+π− and B0s→ψ(2S)π+π− decays are made using a dataset corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment in proton–proton ... -
Precision measurement of the B0 s –B 0 s oscillation frequency with the decay B0 s → D − s π +
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (New Journal of Physics, 2013, Vol. 15, 2013-05)A key ingredient to searches for physics beyond the Standard Model in B0 s mixing phenomena is the measurement of the B0 s – B 0 s oscillation frequency, which is equivalent to the mass difference 1ms ... -
Prompt charm production inppcollisions at √s=7 TeV
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Domingo Bonal, Francesc; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Nuclear Physics B, 2013, Vol. 871, No. 1, 2013-06)Charm production at the LHC in pp collisions at √s=7 TeV is studied with the LHCb detector. The decays D0→K−π+,D+→K−π+π+,D∗+→D0(K−π+)π+,D+s→φ(K−K+)π+,Λ+c→pK−π+, and their charge conjugates are analysed ... -
The Front End Electronics of the Scintillator Pad Detector of the LHCb Calorimeter
Abellan Beteta, Carlos; Bota, S.; Comerma, A.; Dieguez, A.; Garrido, L.; Gascon, D.; Gaspar de Valenzuela, Álvaro; Graciani, R.; Grauges, E.; Herms, A.; Llorens, M.; Luengo Alvarez, Sonia; Picatoste, E.; Riera, J.; Roselló Canal, Mar; Ruiz, H.; Tortella, S.; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Proceedings of the Twelfth Workshop on Electronics for LHC and Future Experiments, 2006-09)In this paper the Front End electronics of the Scintillator Pad Detector (SPD) is outlined. The SPD is a sub-system of the Calorimeter of the LHCb experiment designed to discriminate between charged and ... -
Time alignment of the front end electronics of the LHCb calorimeters
Abellan Beteta, Carlos; Calvo Gómez, Míriam; Camboni, Alessandro; Roselló Canal, Mar; Vilasís Cardona, Xavier (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 ...