Visualitzant Recerca per autor/a "CERN"

Ara mostrant els elements 314-324 de 324

    • Study of η − η′ mixing from measurement of B 0(s)  → J/ψη(′) decay rates 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.1 (Gener), 2015-01-08)
      A study of B and Bs meson decays into J/ψ η and J/ψ η′ final states is performed using a data set of proton-proton collisions at centre-of-mass energies of 7 and 8 TeV, collected by the LCHb experiment ...

    • Study of Υ production and cold nuclear matter effects in pPb collisions at √sNN = 5 TeV 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2014, Vol. 2014, No.7 (Juliol), 2014-07-21)
      Production of Υ mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy sNN−−−−√ = 5 TeV is studied with the LHCb detector. The analysis is based on a data sample corresponding to ...

    • Study of χb meson production in pp collisions at s√=7 and 8TeV and observation of the decay χb(3P)→Υ(3S)γ 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2014, Vol. 74, no. 10 (Octubre), 2014-10-08)
      A study of χb meson production at LHCb is performed on proton–proton collision data, corresponding to 3.0 fb−1of integrated luminosity collected at centre-of-mass energies s√ = 7 and 8 TeV. The fraction ...

    • Tagged time-dependent angular analysis of B0s→J/ψϕ decays with the 2010 LHCb data 

      LHCb Collaboration - CERN (2011-04)
      The interference between B0s decays to Jψϕ either directly or via B0s−B¯0s oscillation gives rise to a CP violating phase ϕJ/ψϕs. In the Standard Model, this phase is approximately -2βs, where βs = arg ...

    • Tagged time-dependent angular analysis of Bs→J/ψϕ decays with 337~pb−1 at LHCb 

      LHCb Collaboration - CERN (2011-08)
      The interference between Bs decays to J/ψϕ either directly or via Bs−B¯¯¯¯s oscillation gives rise to a CP violating phase ϕJψϕs. Using a sample of 8276±94 Bs→J/ψϕ events extracted from 337~pb−1 of pp ...

    • Test of Lepton Universality Using B+→K+ℓ+ℓ− Decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2014, Vol. 113, No. 15 (Octubre), 2014-10-06)
      A measurement of the ratio of the branching fractions of the B+→K+μ+μ− and B+→K+e+e− decays is presented using proton-proton collision data, corresponding to an integrated luminosity of 3.0  fb−1, ...

    • Test of lepton universality with Λ0b→pK−ℓ+ℓ− decays 

      Calvo Gómez, Míriam; Camboni, Alessandro; Golobardes, Elisabet; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2020, 40, 2020-04)
      The ratio of branching fractions of the decays Λ0b → pK−e+e− and Λ0b → pK−μ+μ−, R−1pK, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 ...

    • 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 and Calibration of the LHCb Calorimeter 

      Calvo Gómez, Míriam; LHCb Collaboration - CERN (2010)

    • Updated measurement of decay-time-dependent CP asymmetries in D0→K+K− and D0→π+π− decays 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2020, Vol. 101, n.1 (Gener), 2020-01)
      A search for decay-time-dependent charge-parity (CP) asymmetry in D0→K+K− and D0→π+π− decays is performed at the LHCb experiment using proton-proton collision data recorded at a center-of-mass energy ...

    • Updated measurements of exclusive J/ψ and ψ(2S) production cross-sections in pp collisions at s√=7 TeV 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of Physics G: Nuclear and Particle Physics, 2014, Vol. 41, No. 5, 2014-02)
      The differential cross-section as a function of rapidity has been measured for the exclusive production of J/ψ and ψ(2S) mesons in proton–proton collisions at √s = 7 TeV, using data collected by the ...