Visualitzant Recerca per autor/a "Camboni, Alessandro"

Ara mostrant els elements 121-140 de 209

    • Measurement of ψ(2S) production cross-sections in proton-proton collisions at s√=7 and 13 TeV 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Phisical Journal C, 2020, 185, 2020-02)
      The cross-sections of ψ(2S) meson production in proton-proton collisions at s√=13 TeV are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of 275 pb−1. ...

    • Measurement of ϒ production in pp collisions at s−−√=7 TeV 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2012. Vol. 72, No. 6 (Juny), 2012-06-07)
      The production of ϒ(1S), ϒ(2S) and ϒ(3S) mesons in proton-proton collisions at the centre-of-mass energy of s√=7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb−1 ...

    • Measurement of ϒ production in pp collisions at √ s = 2.76 TeV 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2014, Vol. 74, no. 4 (Abril), 2014-04-29)
      The production of Υ(1S), Υ(2S) and Υ(3S) mesons decaying into the dimuon final state is studied with the LHCb detector using a data sample corresponding to an integrated luminosity of 3.3pb−1 collected ...

    • Measurements of Bþ c Production and Mass with the Bþ c ! J=c þ Decay 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2012, Vol. 109, No. 23 (Desembre), 2012-12-05)
      Measurements of B+c production and mass are performed with the decay mode B+c→J/ψπ+ using 0.37  fb−1 of data collected in pp collisions at √s=7  TeV by the LHCb experiment. The ratio of the production ...

    • Measurements of the B +, B 0, B0s meson and Λ0b baryon lifetimes 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2014, Vol. 2014, No.a (Abril), 2014-04-16)
      Measurements of b-hadron lifetimes are reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. Using ...

    • Measurements of the branching fractions and CP asymmetries of B± → J/ψ π± and B± → ψ(2S) π± decays 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2012, Vol. 85 , No.9 (Maig), 2012-05-07)
      A study of B±→J/ψπ± and B±→ψ(2S)π± decays is performed with data corresponding to 0.37  fb−1 of proton-proton collisions at √s=7  TeV. Their branching fractions are found to be B(B±→J/ψπ±)=(3.88±0.11± ...

    • 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 ...

    • Measurements of the branching fractions of the decays B0s→D∓sK± and B0s→D−sπ+ 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2012, Vol. 2012, No.6 (Juny), 2012-06-20)
      The decay mode B0s→D∓sK± allows for one of the theoretically cleanest measurements of the CKM angle γ through the study of time-dependent CP violation. This paper reports a measurement of its branching ...

    • Measurements of the Λ0b → J/ψ Λ decay amplitudes and the Λ0b polarisation in pp collisions at √s=7 TeV 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physics Letters B , 2013, Vol. 724, No.1-3 (Juliol), 2013-07-09)
      An angular analysis of Lambda_b0 -> J/psi Lambda decays is performed using a data sample corresponding to 1.0 fb^{-1} collected in pp collisions at sqrt(s) = 7 TeV with the LHCb detector at the LHC. A ...

    • Model-independent confirmation of the Z(4430)− state 

      Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2015, Vol. 92, No. 11 (Desembre), 2015-12-29)
      The decay B0→ψ(2S)K+π− is analyzed using 3  fb−1 of pp collision data collected with the LHCb detector. A model-independent description of the ψ(2S)π mass spectrum is obtained, using as input the Kπ ...

    • Model-independent search for CP violation in D0→K-K+π-π+ and D0→π-π+π+π- decays 

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

    • Observation of a new baryon state in the Λ0bπ+π− mass spectrum 

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

    • Observation of a Resonance in B+→K+μ+μ− Decays at Low Recoil 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2013, Vol. 111, No. 11 (Setembre), 2013-09-10)
      A broad peaking structure is observed in the dimuon spectrum of B+→K+μ+μ− decays in the kinematic region where the kaon has a low recoil against the dimuon system. The structure is consistent with ...

    • Observation of associated production of a Z boson with a D meson in the forward region 

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

    • Observation of B(s)(0) → J/ψf(2)'(1525) in J/ψK+ K- final states 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2012, Vol. 108, No. 15 (Abril), 2012-04-09)
      The decay ¯¯¯B0s→J/ψK+K− is investigated using 0.16  fb−1 of data collected with the LHCb detector using 7 TeV pp collisions. Although the J/ψϕ channel is well known, final states at higher K+K− masses ...

    • Observation of B0s –B¯¯¯¯0s mixing and measurement of mixing frequencies using semileptonic B decays 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (The European Physical Journal C, 2013, Vol. 73, no. 12 (Desembre), 2013-12-04)
      The B0s and B 0 mixing frequencies, Δm s and Δm d , are measured using a data sample corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment in pp collisions at a centre ...

    • Observation of B0s→χc1φ decay and study of B0→χ c1,2K∗0 decays 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Nuclear Physics B, 2013, Vol. 874, No. 3, 2013-09)
      The first observation of the decay B0s→χc1φ and a study of B0→χc1,2K∗0 decays are presented. The analysis is performed using a dataset, corresponding to an integrated luminosity of 1.0 fb−1, collected ...

    • Observation of B0→¯¯¯D0K+K− and Evidence for B0s→¯¯¯D0K+K− 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2012, Vol. 109, No. 13 (Setembre), 2012-09-26)
      The first observation of the decay B0→¯¯¯D0K+K− is reported from an analysis of 0.62  fb−1 of pp collision data collected with the LHCb detector. Its branching fraction is measured relative to that of ...

    • Observation of CP violation in B ± → D K ± decays 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physics Letters B, 2012, Vol. 712, No. 3 (Juny), 2012-06-06)
      An analysis of B+ to DK+ and B+ to Dpi+ decays is presented where the D meson is reconstructed in the two-body final states: K+pi-, K+K-, pi+pi- and pi+K-. Using 1.0 fb-1 of LHCb data, measurements of ...

    • Observation of D0−¯¯¯D0 Oscillations 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2013, Vol. 110, No. 10 (Març), 2013-03-05)
      We report a measurement of the time-dependent ratio of D0→K+π− to D0→K−π+ decay rates in D*+-tagged events using 1.0  fb−1 of integrated luminosity recorded by the LHCb experiment. We measure the mixing ...