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CERN Document Server 256 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 1.31 секунд. 
1.
Model-independent confirmation of the $Z(4430)^-$ state / LHCb collaboration
The decay $B^0\to \psi(2S) K^+\pi^-$ is analyzed using $\rm 3~fb^{-1}$ of $pp$ collision data collected with the LHCb detector. A model-independent description of the $\psi(2S) \pi$ mass spectrum is obtained, using as input the $K\pi$ mass spectrum and angular distribution derived directly from data, without requiring a theoretical description of resonance shapes or their interference. [...]
arXiv:1510.01951; CERN-PH-EP-2015-244; LHCB-PAPER-2015-038; CERN-PH-EP-2015-244; LHCB-PAPER-2015-038.- 2015-12-29 - 15 p. - Published in : Phys. Rev. D 92 (2015) 112009 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.92.112009 - PDF; arXiv:1510.01951 - PDF; External link: Figures, tables and other information
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2.
The LHCb Data Acquisition during LHC Run 1 / Alessio, F (CERN) ; Brarda, L (CERN) ; Bonaccorsi, E (CERN) ; Campora Perez, D H (CERN) ; Chebbi, M (CERN) ; Frank, M (CERN) ; Gaspar, C (CERN) ; Granado Cardoso, L (CERN) ; Haen, C (CERN) ; v.Herwijnen, E (CERN) et al.
The LHCb Data Acquisition system reads data from over 300 read-out boards and distributes them to more than 1500 event-filter servers. It uses a simple push-protocol over Gigabit Ethernet. [...]
2014 - 7 p. - Published in : J. Phys.: Conf. Ser. 513 (2014) 012033
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.012033
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3.
A GPU offloading mechanism for LHCb / Badalov, Alexey (Ramon Llull U., Barcelona) ; Campora Perez, Daniel Hugo (CERN) ; Zvyagin, Alexander (CERN) ; Neufeld, Niko (Ramon Llull U., Barcelona) ; Vilasis Cardona, Xavier (Ramon Llull U., Barcelona)
The current computational infrastructure at LHCb is designed for sequential execution. It is possible to make use of modern multi-core machines by using multi-threaded algorithms and running multiple instances in parallel, but there is no way to make efficient use of specialized massively parallel hardware, such as graphical processing units and Intel Xeon/Phi. [...]
2014 - 5 p. - Published in : J. Phys.: Conf. Ser. 513 (2014) 052004
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.052004
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4.
LHCb Detector Performance / LHCb collaboration
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. [...]
arXiv:1412.6352; LHCB-DP-2014-002; CERN-PH-EP-2014-290; CERN-PH-EP-2014-290; LHCB-DP-2014-002.- Geneva : CERN, 2015-03-05 - 73 p. - Published in : Int. J. Mod. Phys. A 30 (2015) 1530022 Fulltext: PDF; World Scientific Open Access article: PDF; External link: Preprint
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5.
Precision luminosity measurements at LHCb / LHCb collaboration
Measuring cross-sections at the LHC requires the luminosity to be determined accurately at each centre-of-mass energy $\sqrt{s}$. In this paper results are reported from the luminosity calibrations carried out at the LHC interaction point 8 with the LHCb detector for $\sqrt{s}$ = 2.76, 7 and 8 TeV (proton-proton collisions) and for $\sqrt{s_{NN}}$ = 5 TeV (proton-lead collisions). [...]
arXiv:1410.0149; LHCB-PAPER-2014-047; CERN-PH-EP-2014-221; LHCB-PAPER-2014-047; CERN-PH-EP-2014-221.- Geneva : CERN, 2014-12-05 - 99 p. - Published in : JINST 9 (2014) P12005 Fulltext: arXiv:1410.0149 - PDF; 10.1088_1748-0221_9_12_P12005 - PDF; IOP Open Access article: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
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6.
Measurement of the $\eta_c (1S)$ production cross-section in proton-proton collisions via the decay $\eta_c (1S) \rightarrow p \bar{p}$ / LHCb collaboration
The production of the $\eta_c (1S)$ state in proton-proton collisions is probed via its decay to the $p \bar{p}$ final state with the LHCb detector, in the rapidity range $2.0 < y < 4.5$ and in the meson transverse-momentum range $p_T > 6.5$ GeV/c. The cross-section for prompt production of $\eta_c (1S)$ mesons relative to the prompt $J/\psi$ cross-section is measured, for the first time, to be $\sigma_{\eta_c (1S)}/\sigma_{J/\psi} = 1.74 \pm 0.29 \pm 0.28 \pm 0.18 _{B}$ at a centre-of-mass energy $\sqrt{s} = 7$ TeV using data corresponding to an integrated luminosity of 0.7 fb$^{-1}$, and $\sigma_{\eta_c (1S)}/\sigma_{J/\psi} = 1.60 \pm 0.29 \pm 0.25 \pm 0.17 _{B}$ at $\sqrt{s} = 8$ TeV using 2.0 fb$^{-1}$. [...]
arXiv:1409.3612; LHCB-PAPER-2014-029; CERN-PH-EP-2014-218; LHCB-PAPER-2014-029; CERN-PH-EP-2014-218.- Geneva : CERN, 2015-07-04 - 20 p. - Published in : Eur. Phys. J. C 75 (2015) 311 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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7.
Measurement of the $\chi_b(3P)$ mass and of the relative rate of $\chi_{b1}(1P)$ and $\chi_{b2}(1P)$ production / LHCb collaboration
The production of $\chi_b$ mesons in proton-proton collisions is studied using a data sample collected by the LHCb detector, at centre-of-mass energies of $\sqrt{s}=7$ and $8$ TeV and corresponding to an integrated luminosity of 3.0 fb$^{-1}$. The $\chi_b$ mesons are identified through their decays to $\Upsilon(1S)\gamma$ and $\Upsilon(2S)\gamma$ using photons that converted to $e^+e^-$ pairs in the detector [...]
arXiv:1409.1408; LHCB-PAPER-2014-040; CERN-PH-EP-2014-206; LHCB-PAPER-2014-040-CERN_PH_EP_2014_206; LHCB-PAPER-2014-040; CERN-PH-EP-2014-206.- Geneva : CERN, 2014-10-14 - 22 p. - Published in : JHEP 10 (2014) 088 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF;
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8.
Measurements of $C\!P$ violation in the three-body phase space of charmless $B^{\pm}$ decays / LHCb Collaboration
Additional abstract: The additional document presents figures of the projections into the two-body invariant masses of the spectra of $B^{\pm} \to K^{\pm}\pi^+\pi^-, B^{\pm} \to K^{\pm}K^+K^-, B^{\pm} \to \pi^{\pm} K^+ K^-$ and $B^{\pm} \to \pi^{\pm} \pi^+ \pi^-$ decays. The figures show additional information related to the CP asymmetry in phase space, for section VII of the article Physical Review D 90, 112004 (2014)..
arXiv:1408.5373; CERN-PH-EP-2014-203; LHCB-PAPER-2014-044; LHCB-PAPER-2014-044; arXiv:1408.5373.- Geneva : CERN, 2014-12-11 - 17 p. - Published in : Phys. Rev. D 90 (2014) 112004 APS Open Access article: PDF; Additional document: PDF; Additional info: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): LHCb-PAPER-2014-044_supplementary - ZIP; LHCb-PAPER-2014-044_AddInfo_figs_v3 - ZIP; External link: Preprint
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9.
Determination of $\gamma$ and $-2\beta_s$ from charmless two-body decays of beauty mesons / LHCb collaboration
Using the latest LHCb measurements of time-dependent $C\!P$ violation in the $B^0_s \to K^+K^-$ decay, a U-spin relation between the decay amplitudes of $B^0_s \to K^+K^-$ and $B^0\to \pi^+\pi^-$ decay processes allows constraints to be placed on the angle $\gamma$ of the unitarity triangle and on the $B^0_s$ mixing phase $-2\beta_s$. Results from an extended approach, which uses additional inputs on $B^0\to \pi^0\pi^0$ and $B^+\to \pi^+\pi^0$ decays from other experiments and exploits isospin symmetry, are also presented. [...]
arXiv:1408.4368; CERN-PH-EP-2014-207; LHCB-PAPER-2014-045; CERN-PH-EP-2014-207; LHCB-PAPER-2014-045.- Geneva : CERN, 2015-02-04 - 11 p. - Published in : Phys. Lett. B 741 (2015) 1 Article from SCOAP3: PDF; Elsevier Open Access article : PDF; Fulltext: arXiv:1408.4368 - PDF; S0370269314008867 - XML; Related data file(s): ZIP;
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10.
Measurement of the forward $W$ boson cross-section in $pp$ collisions at $\sqrt{s} $ = 7 TeV / LHCb collaboration
A measurement of the inclusive $W \to \mu\nu$ production cross-section using data from $pp$ collisions at a centre-of-mass energy of $\sqrt{s} = 7 {\rm \, TeV}$ is presented. The analysis is based on an integrated luminosity of about $1.0 {\rm \, fb}^{-1}$ recorded with the LHCb detector. [...]
arXiv:1408.4354; LHCB-PAPER-2014-033; CERN-PH-EP-2014-175; LHCB-PAPER-2014-033; CERN-PH-EP-2014-175.- Geneva : CERN, 2014-12-10 - 29 p. - Published in : JHEP 12 (2014) 079 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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