Browsing by Author "Badalov, Alexey"

Now showing items 1-20 of 110

    • A study of CP violation in B±→DK± and B±→Dπ± decays with D→K0SK±π∓ final states 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (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 ...

    • Amplitude analysis of B0 → ¯D0K+π− decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2015, Vol.92, No.1 (Juliol), 2015-07-20)
      The Dalitz plot distribution of B0→¯D0K+π− decays is studied using a data sample corresponding to 3.0  fb−1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. The data are described ...

    • Angular analysis and differential branching fraction of the decay B 0 s  → ϕμ + μ − 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.9 (Setembre), 2015-09-25)
      An angular analysis and a measurement of the differential branching fraction of the decay B 0 s  → ϕμ + μ − are presented, using data corresponding to an integrated luminosity of 3.0 fb−1 of pp collisions ...

    • Angular analysis of charged and neutral B → Kμ + μ − decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; LHCb Collaboration - CERN (Journal of High Energy Physics, 2014, Vol. 2014, No.5 (Maig), 2014-05-19)
      The angular distributions of the rare decays B + → K + μ + μ − and B0→K0Sμ+μ− are studied with data corresponding to 3fb−1 of integrated luminosity, collected in proton-proton collisions at 7 and 8 TeV ...

    • Angular analysis of the B0 → K*0e+e− decay in the low-q2 region 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.4 (Abril), 2015-04-14)
      An angular analysis of the B0 → K*0e+e− decay is performed using a data sample, corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment in pp collisions at centre-of-mass ...

    • B flavour tagging using charm decays at the LHCb experiment 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of Instrumentation, 2015, Vol. 10, 2015-10)
      An algorithm is described for tagging the flavour content at production of neutral B mesons in the LHCb experiment. The algorithm exploits the correlation of the flavour of a B meson with the charge of ...

    • Dalitz plot analysis of B0 → D¯ 0πþπ− decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2015, Vol. 92, No. 3, 2015-08)
      The resonant substructures of B0 → D¯ 0πþπ− decays are studied with the Dalitz plot technique. In this study a data sample corresponding to an integrated luminosity of 3.0 fb−1 of pp collisions collected ...

    • Dalitz plot analysis of B0s→¯D0K−π+ decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2014, Vol. 90 , No.7 (Octubre), 2014-10-14)
      The resonant substructure of B0s→¯D0K−π+ decays is studied with the Dalitz plot analysis technique. The study is based on a data sample corresponding to an integrated luminosity of 3.0  fb−1 of pp ...

    • Determination of the branching fractions of B 0S  → D ∓S K ∓ and B 0 → D −S K + 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.19 (Abril), 2015-04-07)

    • Determination of the quark coupling strength |Vub| using baryonic decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Nature Physics, 2015, Vol. 11, 2015-07)
      In the Standard Model of particle physics, the strength of the couplings of the b quark to the u and c quarks, |Vub| and |Vcb|, are governed by the coupling of the quarks to the Higgs boson. Using data ...

    • Differential branching fraction and angular analysis of Λ 0 b  → Λμ+μ− decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.115 (Juny), 2015-06-17)
      The differential branching fraction of the rare decay Λ 0 b  → Λμ+μ− is measured as a function of q2, the square of the dimuon invariant mass. The analysis is performed using proton-proton collision ...

    • Differential branching fractions and isospin asymmetries of B → K (*) μ + μ − decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2014, Vol. 2014, No.6 (Juny), 2014-06-26)
      The isospin asymmetries of B → Kμ + μ − and B → K * μ + μ − decays and the partial branching fractions of the B 0 → K 0 μ + μ −, B + → K + μ + μ − and B + → K *+ μ + μ − decays are measured as functions ...

    • Effective lifetime measurements in the B0s → K+K− , B0 → K+π− and B0s → π+K− decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (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. ...

    • Evidence for CP Violation in B+→p¯pK+ Decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (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 the decay B+c→J/ψ3π+2π− 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2014, Vol. 2014, No.2 (Febrer), 2014-05-30)
      Evidence is presented for the decay B+c→J/ψ3π+2π− using proton-proton collision data, corresponding to an integrated luminosity of 3 fb−1, collected with the LHCb detector. A signal yield of 32 ± 8 ...

    • Evidence for the decay X(3872) →ψ(2S)γ 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Nuclear Physics B, 2014, Vol. 886, 2014-09)
      Evidence for the decay mode X(3872) →ψ(2S)γ in B+→X(3872)K+decays is found with a sig-nificance of 4.4 standard deviations. The analysis is based on a data sample of proton–proton collisions, corresponding ...

    • Evidence for the Strangeness-Changing Weak Decay Ξ−b→Λ0bπ− 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (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−. ...

    • First Measurement of the Charge Asymmetry in Beauty-Quark Pair Production 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (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 observation and amplitude analysis of the B−→D+K−π− decay 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2015, Vol.91, No.9 (Maig), 2015-05-05)
      The B−→D+K−π− decay is observed in a data sample corresponding to 3.0  fb−1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. Its branching fraction is measured to be ...

    • First observation and measurement of the branching fraction for the decay B 0 s  → D ∗ s ∓ K ± 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.6 (Juny), 2015-06-18)
      The first observation of the B 0 s  → D ∗ s ∓ K ± decay is reported using 3.0 fb−1 of proton-proton collision data collected by the LHCb experiment. The D ∗ s ∓ mesons are reconstructed through the decay ...