Recerca: Enviaments recents

Ara mostrant els elements 1201-1220 de 2793

    • Differential branching fraction and angular analysis of the B+ → K+ μ+ μ− decay 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2013, Vol. 2013, No.2 (Febrer), 2013-02-19)
      The angular distribution and differential branching fraction of the decay B +→ K + μ + μ − are studied with a dataset corresponding to 1.0fb−1 of integrated luminosity, collected by the LHCb experiment. ...

    • Measurement of the B¯0−B0 and B¯0s−B0s production asymmetries in pp collisions at s√=7 TeV 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physics Letters B , 2014, Vol. 739 (Desembre), 2014-12-12)
      The B¯0−B0 and B¯0s−B0s production asymmetries, AP(B0) and AP(B0s), are measured by means of a time-dependent analysis of B0→J/ψK∗0, B0→D−π+ and B0s→D−sπ+ decays, using a data sample corresponding to ...

    • First observation of the decay Bbar0s->D0K*0 and a measurement of the ratio of branching fractions Br(Bbar0s->D0K*0) / Br(Bbar0s->D0 rho0) 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physics Letters B , 2011, Vol. 706, No. 1 (Novembre), 2011-11-30)
      The first observation of the decay B0s →D0K∗0 using pp data collected by the LHCb detector at a centreof- mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb−1, is reported. A ...

    • Search for the rare decays B0s → μ+ μ− and B0 → μ+ μ- 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physics Letters B , 2011, Vol. 699, No.5 (Maig), 2011-05-23)
      A search for the decays B0s →μ+μ− and B0→μ+μ− is performed with about 37 pb−1 of pp collisions at √ s = 7 TeV collected by the LHCb experiment at the Large Hadron Collider at CERN. The observed numbers ...

    • 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 ...

    • Measurement of b-hadron branching fractions fortwo-body decays into charmless charged hadrons 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2012, Vol. 2012, No.10 (Octubre), 2012-10-04)
      Based on data corresponding to an integrated luminosity of 0.37 fb−1 collected by the LHCb experiment in 2011, the following ratios of branching fractions are measured: $ B(B0→π+π−)/B(B0→K+π−)=0.262±0 ...

    • Addendum: Observation of double charm production involving open charm in pp collisions at√s= 7 TeV 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2041, Vol. 2014, No.3 (Març), 2014-03-24)

    • Search for the Λ 0b  → Λη ′ and Λ 0b  → Λη decays with the LHCb detector 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.6 (Setembre), 2015-09-01)
      A search is performed for the as yet unobserved baryonic Λ 0b  → Λη ′ and Λ 0b  → Λη decays with 3 fb−1 of proton-proton collision data recorded by the LHCb experiment. The B0 → K 0s η ′ decay is used ...

    • 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 ...

    • Measurement of the ratio of prompt χc to J/ψ production in pp collisions at √s=7TeV 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physics Letters B , 2012, Vol. 718, No. 2 (Desembre), 2012-12-05)
      The prompt production of charmoniumχcandJ/ψstates is studied in proton–proton collisionsat a centre-of-mass energy of√s=7 TeV at the Large Hadron Collider. TheχcandJ/ψmesonsare identified through their ...

    • First evidence for the annihilation decay mode B+→D+sφ 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2013, Vol. 2013, No.2 (Febrer), 2013-02-07)
      Evidence for the hadronic annihilation decay mode B+→D+sϕ is found with greater than 3σ significance. The branching fraction and CP asymmetry are measured to be $ B(B+→D+sϕ)=(1.87+1.25−0.73(stat)±0.1 ...

    • Searches for B0(s) →J/ψpp¯¯¯ and B + → J/ψ p p¯¯¯ π + decays 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2013, Vol. 2013, No. (Setembre), 2013-09-02)
      The results of searches for B0(s)→J/ψ pp¯¯¯ and B + → J/ψ p p¯¯¯π+ decays are reported. The analysis is based on a data sample, corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions, ...

    • First evidence of direct CP violation in charmless two-body decays of B0s mesons 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters , 2012, Vol. 108, No.20 (Maig), 2012-05-16)
      Using a data sample corresponding to an integrated luminosity of 0.35  fb−1 collected by LHCb in 2011, we report the first evidence of CP violation in the decays of B0s mesons to K±π∓ pairs, ...

    • 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 ...

    • 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 ...

    • First measurement of time-dependent CP violation in B0s→K+K− decays 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2013, Vol. 2013, No.10 (Octubre), 2013-10-25)
      Direct and mixing-induced CP-violating asymmetries in B0s→K+K− decays are measured for the first time using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb−1, collected ...

    • 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 ...

    • Measurement of CP asymmetries and polarisation fractions in B0s→K∗0K¯¯¯¯¯∗0 decays 

      Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.7 (Juliol), 2015-07-30)
      An angular analysis of the decay B0s→K∗0K¯¯¯¯¯∗0 is performed using pp collisions corresponding to an integrated luminosity of 1.0 fb−1 collected by the LHCb experiment at a centre-of-mass energy s√=7 ...

    • A Three Methods Proactive Improvement Model for Buildings Construction Processes 

      Banawi, Abdul-Aziz; Besné Yanguas, Alia; Ferrandiz, José; Fonseca Escudero, David (Sustainability, 2020, Vol. 12, No 10, 2020-05)
      This paper proposes a proactive model to improve the overall performance of constructionprocesses. The main advantage is that potential waste and associate impacts could be identified in theearly stages ...

    • First observation of the decay B+c → J/ψ K+ 

      Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2013, Vol. 2013, No.9 (Setembre), 2013-09-13)
      The decay B+c→J/ψK+ is observed for the first time 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-of-mass energy ...