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CERN Document Server Намерени са 2,050 записа  1 - 10следващкрай  отиване на запис: Търсенето отне 0.97 секунди. 
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Mapping the material in the LHCb vertex locator using secondary hadronic interactions / Alexander, M. (Glasgow U.) ; Barter, W. (Manchester U.) ; Bay, A. (Ecole Polytechnique, Lausanne) ; Bel, L.J. (NIKHEF, Amsterdam) ; van Beuzekom, M. (NIKHEF, Amsterdam) ; Bogdanova, G. (SINP, Moscow) ; Borghi, S. (Manchester U.) ; Bowcock, T.J.V. (Liverpool U.) ; Buchanan, E. (Bristol U.) ; Buytaert, J. (CERN) et al.
Precise knowledge of the location of the material in the LHCb vertex locator (VELO) is essential to reducing background in searches for long-lived exotic particles, and in identifying jets that originate from beauty and charm quarks. Secondary interactions of hadrons produced in beam-gas collisions are used to map the location of material in the VELO. [...]
arXiv:1803.07466; CERN-LHCb-DP-2018-002; CERN-LHCB-DP-2018-002.- 2018-06-13 - 11 p. - Published in : JINST 13 (2018) P06008 Fulltext: PDF; Fulltext from Publisher: PDF; External link: Figures, tables and other information
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Velo Upgrade Module Nomenclature / Coco, Victor (European Organization for Nuclear Research (CERN), Geneva, Switzerland) ; Akiba, Kazu (Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands) ; Back, John (Department of Physics, University of Warwick, Coventry, United Kingdom) ; Bertella, Claudia (European Organization for Nuclear Research (CERN), Geneva, Switzerland) ; Bitadze, Alexander (School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom) ; Boente García, Oscar (Instituto Galego de Física de Altás (IGFAE), Universidade de Santiago de Compostela,Santiago de Compostela, Spain) ; Bogdanova, Galina (Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia) ; Borghi, Silvia (School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom) ; Bowcock, Themis (Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom) ; Bridges, Kieran (Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom) et al.
The nomenclature and geometry of the various constituents of velo upgrade hybrid sensors are defined, as well as their position within the modules. The modules nomenclature and their position along the z-axis are defined..
LHCb-PUB-2019-008; CERN-LHCb-PUB-2019-008.- Geneva : CERN, 2019 - 14. Fulltext: PDF;
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The LHCb VELO Upgrade module construction / Akiba, K. (NIKHEF, Amsterdam) ; Alexander, M. (Glasgow U.) ; Bertella, C. (Manchester U.) ; Biolchini, A. (NIKHEF, Amsterdam) ; Bitadze, A. (Manchester U.) ; Bogdanova, G. (Higher Sch. of Economics, Moscow) ; Borghi, S. (Manchester U.) ; Bowcock, T.J.V. (Liverpool U.) ; Bridges, K. (Liverpool U.) ; Brock, M. (Oxford U.) et al.
The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I detector facilitates operation at higher luminosity and utilises full-detector information at the LHC collision rate, critically including the use of vertex information. [...]
arXiv:2404.13615; LHCb-DP-2024-001; LHCb-PAPER-2024-001.- 2024-06-17 - 66 p. - Published in : JINST 19 (2024) P06023 Fulltext: 2404.13615 - PDF; Publication - PDF;
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Measurement of thermal properties of the LHCb VELO detector using track-based software alignment / LHCb VELO Collaboration
The thermal properties of the LHCb Vertex Locator (VELO) are studied using the real-time detector alignment procedure. The variation of the position and orientation of the detector elements as a function of the operating temperature of the VELO is presented. [...]
arXiv:2205.13477.- 2023-10-02 - 13 p. - Published in : JINST 18 (2023) P10003 Fulltext: 2205.13477 - PDF; document - PDF;
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Measurement of $\Upsilon$ production in $pp$ collisions at $\sqrt{s} = 7$ TeV / LHCb Collaboration
The production of Upsilon(1S), Upsilon(2S) and Upsilon(3S) mesons in proton-proton collisions at the centre-of-mass energy of sqrt(s)=7 TeV is studied with the LHCb detector. The analysis is based on a data sample of 25 pb-1 collected at the Large Hadron Collider. [...]
arXiv:1202.6579; CERN-PH-EP-2012-051; LHCB-PAPER-2011-036; CERN-PH-EP-2012-051; LHCB-PAPER-2011-036.- Geneva : CERN, 2012-06-07 - 22 p. - Published in : Eur. Phys. J. C 72 (2012) 2025 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: DURHAM
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Measurement of the $B^\pm$ production cross-section in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb Collaboration
The production of B+- mesons in proton-proton collisions at sqrt(s)=7 TeV is studied using 35 pb-1 of data collected by the LHCb detector. The B+- mesons are reconstructed exclusively in the B+- -> J/psi K+- mode, with J/psi -> mu+ mu-. [...]
arXiv:1202.4812; CERN-PH-EP-2012-047; LHCB-PAPER-2011-043; CERN-PH-EP-2012-047; LHCB-PAPER-2011-043.- Geneva : CERN, 2012 - 7 p. - Published in : JHEP 04 (2012) 093 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: DURHAM
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Opposite-side flavour tagging of $B$ mesons at the LHCb experiment / LHCb Collaboration
The calibration and performance of the opposite-side flavour tagging algorithms used for the measurements of time-dependent asymmetries at the LHCb experiment are described. The algorithms have been developed using simulated events and optimized and calibrated with B+ -> J/psi K+, B0 -> J/psi K*0 and B0 -> D*- mu+ nu_mu decay modes with 0.37 fb^-1 of data collected in pp collisions at sqrt(s) = 7 TeV during the 2011 physics run. [...]
arXiv:1202.4979; CERN-PH-EP-2012-039; LHCB-PAPER-2011-027; CERN-PH-EP-2012-039; LHCB-PAPER-2011-027.- Geneva : CERN, 2012-06-07 - 22 p. - Published in : Eur. Phys. J. C 72 (2012) 2022 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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Search for the rare decays $B^0_s \to \mu^+\mu^-$ and $B^0 \to \mu^+\mu^-$ / LHCb Collaboration
A search for the decays $B^0_s \to \mu^+ \mu^-$ and $B^0 \to \mu^+ \mu^-$ is performed with 0.37 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}$ = 7~TeV collected by the LHCb experiment in 2011. The upper limits on the branching fractions are ${\cal B} (B^0_s \to \mu^+ \mu^-) < 1.6 \times 10^{-8}$ and ${\cal B}(B^0 \to \mu^+ \mu^-) <3.6 \times 10^{-9}$ at 95% confidence level. [...]
arXiv:1112.1600; CERN-PH-EP-2011-186; LHCB-PAPER-2011-025; CERN-PH-EP-2011-186; LHCB-PAPER-2011-025.- Geneva : CERN, 2013-07-16 - 13 p. - Published in : Phys. Lett. B 708 (2012) 55-67 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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Measurement of charged particle multiplicities in $pp$ collisions at $\sqrt{s}$ = 7 TeV in the forward region / LHCb Collaboration
The charged particle production in proton-proton collisions is studied with the LHCb detector at a centre-of-mass energy of ${\sqrt{s} =7}$TeV in different intervals of pseudorapidity $\eta$. The charged particles are reconstructed close to the interaction region in the vertex detector, which provides high reconstruction efficiency in the $\eta$ ranges $-2.5<\eta<-2.0$ and $2.0<\eta<4.5$. [...]
arXiv:1112.4592; LHCB-PAPER-2011-011; CERN-PH-EP-2011-209; LHCB-PAPER-2011-011; CERN-PH-EP-2011-209.- Geneva : CERN, 2012-04-20 - 23 p. - Published in : Eur. Phys. J. C 72 (2012) 1947 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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Evidence for CP violation in time-integrated $D^0 \rightarrow h^-h^+$ decay rates / LHCb Collaboration
A search for time-integrated CP violation in D0 -> h-h+ (h=K, pi) decays is presented using 0.62 fb^-1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D*+ -> D0 pi+ and D*- -> D0bar pi- decay chains. [...]
arXiv:1112.0938; LHCB-PAPER-2011-023; CERN-PH-EP-2011-208; LHCB-PAPER-2011-023; CERN-PH-EP-2011-208.- Geneva : CERN, 2012 - 8 p. APS Open Access article: PDF; Extra material: ZIP; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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