Visualitzant Recerca per autor/a "CERN"
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First observation of the decay B¯0s→D0K∗0 and a measurement of the ratio of branching fractions B(B¯0s→D0K∗0)/B(B¯0→D0ρ0)
Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physics Letters B, Vol. 706, No. 1 (Novembre 2011), 2011-11-30)The first observation of the decay B¯s0→D0K⁎0 using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb−1 , is reported. A ... -
First Observation of the Decay B∗s2(5840)0→B*+K− and Studies of Excited B0s Mesons
Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2013, Vol. 110, No. 15 (Abril), 2013-04-09)The properties of the orbitally excited (L=1) B0s states are studied by using 1.0 fb−1 of pp collisions at √s=7 TeV collected with the LHCb detector. The first observation of the B∗s2(5840)0 meson ... -
First observation of the decays ¯B0(s) → D+sK−π+π− and ¯B0s → Ds1(2536)+π−
Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2012, Vol. 86 , No.11 (Desembre), 2012-12-20)The first observation of the decays ¯¯¯B0s→D+sK−π+π− and ¯¯¯B0→D+sK−π+π− are reported using an integrated luminosity of 1.0 fb−1 recorded by the LHCb experiment. The branching fractions, normalized ... -
First Observation of Top Quark Production in the Forward Region
Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2015, Vol. 115, No. 11 (Setembre), 2015-09-08)Top quark production in the forward region in proton-proton collisions is observed for the first time. The W+b final state with W→μν is reconstructed using muons with a transverse momentum, pT, larger ... -
First observation of ¯¯¯B0→J/ψK+K− and search for ¯¯¯B0→J/ψϕ decays
Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review D, 2013, Vol. 88 , No.7 (Octubre), 2013-10-14)The first observation of the ¯¯¯B0→J/ψK+K− decay is presented with a data sample corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions at a center-of-mass energy of 7 TeV collected ... -
First observations of the rare decays B + → K + π + π − μ + μ − and B +→ ϕK + μ + μ −
Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2014, Vol. 2014, No.10 (Octubre), 2014-10-09)First observations of the rare decays B + → K + π + π − μ + μ − and B +→ ϕK +μ+μ− are presented using data corresponding to an integrated luminosity of 3.0 fb−1, collected by the LHCb experiment at ... -
Flavour Tagging at LHCb
Calvo Gómez, Míriam; LHCb Collaboration - CERN (2012-06)The identification of the flavour of reconstructed Bd and Bs mesons at production is necessary for the measurements of oscillations and time-dependent CP asymmetries. The calibration and performance of ... -
Forward production of Υ mesons in pp collisions at s√=7 and 8 TeV
Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of High Energy Physics, 2015, Vol. 2015, No.11 (Novembre), 2015-11-16)The production of Υ mesons in pp collisions at s√=7 and 8 TeV is studied with the LHCb detector using data samples corresponding to an integrated luminosity of 1 fb−1 and 2 fb−1 respectively. The ... -
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 ... -
Identification of beauty and charm quark jets at LHCb
Badalov, Alexey; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Journal of Instrumentation, 2015, Vol. 10, 2015-06)Identification of jets originating from beauty and charm quarks is important for measuring Standard Model processes and for searching for new physics. The performance of algorithms developed to select ... -
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 ... -
Isospin Amplitudes in Λ0b→J/ψΛ(Σ0) and Ξ0b→J/ψΞ0(Λ) Decays
Camboni, Alessandro; Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (Physical Review Letters, 2020, Vol.124, 111802, 2020-02)Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first ... -
LHCb Calorimeters: Technical Design Report
Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (2000-09-07) -
LHCb computing: Technical Design Report
Ballabriga Suñé, Rafel; Luengo Álvarez, Sonia; Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (2005-06-20) -
LHCb detector performance
Calvo Gómez, Míriam; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (International Journal of Modern Physics A, 2015, Vol. 30, No. 7, 2015-03)The LHCb detector is a forward spectrometer at the Large Hadron Collider (LHC) at CERN. The experiment is designed for precision measurements of CP violation and rare decays of beauty and charm hadrons. ... -
LHCb inner tracker: Technical Design Report
Ballabriga Suñé, Rafel; Luengo Álvarez, Sonia; Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (2002-11-08)The LHCb experiment [1] is designed to exploit the large bb production cross section at the LHC in order to perform a wide range of precision studies of CP violating phenomena. The copious production ... -
LHCb Muon System: Technical Design Report
Ballabriga Suñé, Rafel; Luengo Álvarez, Sonia; Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (2001-05-28) -
LHCb online system, data acquisition and experiment control: Technical Design Report
Ballabriga Suñé, Rafel; Luengo Álvarez, Sonia; Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (2001-12-19) -
LHCb outer tracker: Technical Design Report
Ballabriga Suñé, Rafel; Luengo Álvarez, Sonia; Roselló Canal, Mar; Vilasís Cardona, Xavier; LHCb Collaboration - CERN (2001-09-14)