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Major changes to the LHCb Grid computing model in year 2 of LHC data / Arrabito, L (CC, Villeurbanne) ; Bernardoff, V (CERN) ; Bouvet, D (CC, Villeurbanne) ; Cattaneo, M (CERN) ; Charpentier, P (CERN) ; Clarke, P (Edinburgh U.) ; Closier, J (CERN) ; Franchini, P (INFN, Ferrara) ; Graciani, R (Barcelona U.) ; Lanciotti, E (CERN) et al.
The increase of luminosity of the LHC in 2011 also introduced an increase of computing requirements for data processing. This paper describes the data processing operations during 2011 prompt reconstruction as well as the end of year re-processing of the full data sample. [...]
2012 - 8 p.

In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.032092

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LHCb conditions database operation assistance systems / Clemencic, M (CERN) ; Shapoval, I (CERN ; Kharkov, KIPT) ; Cattaneo, M (CERN) ; Degaudenzi, H (CERN ; Ecole Polytechnique, Lausanne) ; Santinelli, R (CERN)
The Conditions Database (CondDB) of the LHCb experiment provides versioned, time dependent geometry and conditions data for all LHCb data processing applications (simulation, high level trigger (HLT), reconstruction, analysis) in a heterogeneous computing environment ranging from user laptops to the HLT farm and the Grid. These different use cases impose front-end support for multiple database technologies (Oracle and SQLite are used). [...]
2012 - 22 p.

In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.052022

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Measurement of the forward energy flow in $pp$ collisions at $\sqrt{s}$= 7 TeV / LHCb Collaboration
The energy flow created in pp collisions at $\sqrt{s}$=7 TeV is studied within the pseudorapidity range 1.9<eta<4.9 with data collected by the LHCb experiment. The measurements are performed for inclusive minimum-bias interactions, hard scattering processes and events with an enhanced or suppressed diffractive contribution. [...]
arXiv:1212.4755; CERN-PH-EP-2012-346; LHCB-PAPER-2012-034; CERN-PH-EP-2012-346; LHCB-PAPER-2012-034.- Geneva : CERN, 2013 - 17 p. - Published in : Eur. Phys. J. C 73 (2013) 2421 APS published version, local copy: PDF; Fulltext: PDF; Related data (files): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference

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First observation of the $B_{s2}^\ast(5840)^0 \to B^{\ast+} K^-$ and studies of excited $B^0_s$ mesons / LHCb Collaboration
Properties of the orbitally excited (L=1) $B_s$ states are studied using 1.0 fb$^{-1}$ of pp collisions at $\sqrt{s} =7$ TeV collected with the LHCb detector. The first observation of the $B_{s2}^*(5840)^0$ meson decaying to $B^{*+} K^-$ is reported, and the corresponding branching fraction measured relative to the $B^+ K^-$ decay mode. [...]
arXiv:1211.5994; LHCB-PAPER-2012-030; CERN-PH-EP-2012-340; LHCB-PAPER-2012-030; CERN-PH-EP-2012-340.- Geneva : CERN, 2013-04-09 - 9 p. - Published in : Phys. Rev. Lett. 110 (2013) 151803 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Measurement of the time-dependent $CP$ asymmetry in $B^0 \to J/\psi K^0_{\rm S}$ decays / LHCb Collaboration
This Letter reports a measurement of the $CP$ violation observables $S_{J/\psi K^0_{\rm S}}$ and $C_{J/\psi K^0_{\rm S}}$ in the decay channel $B^0 \rightarrow J/\psi K^0_{\rm S}$ performed with 1.0 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=7$ TeV collected by the LHCb experiment. The fit to the data yields $S_{J/\psi K^0_{\rm S}}= 0.73 \pm 0.07 {\rm (stat)} \pm 0.04 {\rm (syst)}$ and $C_{J/\psi K^0_{\rm S}}= 0.03 \pm 0.09 {\rm (stat)} \pm 0.01 {\rm (syst)}$. [...]
arXiv:1211.6093; LHCB-PAPER-2012-035; CERN-PH-EP-2012-331; LHCB-PAPER-2012-035; CERN-PH-EP-2012-331.- Geneva : CERN, 2013-04-10 - 16 p. - Published in : Phys. Lett. B 721 (2013) 24-31 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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First observation of the decays $\bar{B}^0_{(s)}\to D_s^+K^-\pi^+\pi^-$ and $\bar{B}^0_s\to D_{s1}(2536)^+\pi^-$ / LHCb collaboration
The first observation of the decays $\bar{B}^0_{s}\to D_s^+K^-\pi^+\pi^-$ and $\bar{B}^0\to D_s^+K^-\pi^+\pi^-$ are reported using an integrated luminosity of 1.0 fb$^{-1}$ recorded by the LHCb experiment. The branching fractions, normalized with respect to $\bar{B}^0_{s}\to D_s^+\pi^-\pi^+\pi^-$ and $\bar{B}^0_{s}\to D_s^+K^-\pi^+\pi^-$, respectively, are measured to be $\frac{B(\bar{B}^0_{s}\to D_s^+K^-\pi^+\pi^-)}{B(\bar{B}^0_{s}\to D_s^+\pi^-\pi^+\pi^-)} = (5.2\pm0.5\pm0.3)\times10^{-2}$, $\frac{B(\bar{B}^0\to D_s^+K^-\pi^+\pi^-)}{B(\bar{B}^0_{s}\to D_s^+K^-\pi^+\pi^-)} = 0.54\pm0.07\pm0.07$, where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1211.1541; LHCB-PAPER-2012-033; CERN-PH-EP-2012-327; LHCB-PAPER-2012-033; CERN-PH-EP-2012-327.- 2012 - 17 p. - Published in : Phys. Rev. D 86 (2012) 112005 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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A study of the $Z$ production cross-section in $pp$ collisions at $\sqrt{s}$ = 7 TeV using tau final states / LHCb Collaboration
A measurement of the inclusive $Z \to \tau\tau$ cross-section in $pp$ collisions at $\sqrt{s} = 7$ TeV is presented based on a dataset of 1.0 fb$^{-1}$ collected by the LHCb detector. Candidates for $Z \to \tau\tau$ decays are identified through reconstructed final states with two muons, a muon and an electron, a muon and a hadron, or an electron and a hadron. [...]
arXiv:1210.6289; LHCB-PAPER-2012-029; CERN-PH-EP-2012-314; LHCB-PAPER-2012-029; CERN-PH-EP-2012-314.- Geneva : CERN, 2013 - 15 p. - Published in : JHEP 01 (2013) 111 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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Measurement of the $B^0$--$\bar B^0$ oscillation frequency $\Delta m_d$ with the decays $B^0 \to D^- \pi^+$ and $B^0 \to J\ \psi K^{*0}$ / LHCb Collaboration
The $B^0$--$\bar B^0$ oscillation frequency $\Delta m_d$ is measured by the LHCb experiment using a dataset corresponding to an integrated luminosity of $1.0\,$fb$^{-1}$ of proton-proton collisions at $\sqrt{s} = 7\,$TeV, and is found to be $\Delta m_d = 0.5156 \pm 0.0051\,($stat.$) \pm 0.0033\,($syst.$)\,$ps$^{-1}$. The measurement is based on results from analyses of the decays $B^0 \to D^- \pi^+$ ($D^- \to K^+ \pi^- \pi^-$) and $B^0 \to J\ \psi K^{*0}$ ($J\ \psi \to \mu^+ \mu^-$, $K^{*0} \to K^+ \pi^-$) and their charge conjugated modes..
arXiv:1210.6750; LHCB-PAPER-2012-032; CERN-PH-EP-2012-315; LHCB-PAPER-2012-032; CERN-PH-EP-2012-315.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 719 (2013) 318-325 APS published version, local copy: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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First observation of the decay $B^+ \to \pi^+ \mu^+\mu^-$ / LHCb Collaboration
A discovery of the rare decay $B^{+} \rightarrow \pi^{+} \mu^{+} \mu^{-}$ is presented. This decay is observed for the first time, with 5.2 $\sigma$ significance. [...]
arXiv:1210.2645; LHCB-PAPER-2012-020; CERN-PH-EP-2012-284; LHCB-PAPER-2012-020; CERN-PH-EP-2012-284.- Geneva : CERN, 2012 - 20 p. - Published in : JHEP 12 (2012) 125 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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10.

Measurement of the $C\!P$ asymmetry in $B^0 \to K^{*0} \mu^+ \mu^-$ decays / LHCb Collaboration
A measurement of the $C\!P$ asymmetry in $B^0 \rightarrow K^{*0} \mu^+ \mu^-$ decays is presented, based on 1.0$\mbox{\,fb}^{-1}$ of $pp$ collision data recorded by the LHCb experiment during 2011. The measurement is performed in six bins of invariant mass squared of the $\mu^+\mu^-$ pair, excluding the $\mathrm{J}\mskip -3mu/\mskip -2mu\psi\mskip 2mu$ and $\psi(2S)$ resonance regions. [...]
arXiv:1210.4492; LHCB-PAPER-2012-021; CERN-PH-EP-2012-302; LHCB-PAPER-2012-021; CERN-PH-EP-2012-302.- Geneva : CERN, 2013-01-17 - 8 p. - Published in : Phys. Rev. Lett. 110 (2013) 031801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Vedi anche: autori con nomi simili
124	SANTINELLI, R
42	Santinelli, R.
10	Santinelli, Roberto

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