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CERN Document Server Pronađeno je 2,049 zapisa  1 - 10slijedećikraj  idi na zapis: Pretraživanje je potrajalo 0.34 sekundi 
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Characterisation of Medipix3 Silicon Detectors in a Charged-Particle Beam / Akiba, K. (Rio de Janeiro Federal U.) ; Alozy, J. (CERN) ; Aoude, R.Tourinho (Rio de Janeiro, Pont. U. Catol.) ; van Beuzekom, M. (NIKHEF, Amsterdam) ; Buytaert, J. (CERN) ; Collins, P. (CERN) ; Dosil Suárez, A. (Santiago de Compostela U.) ; Dumps, R. (CERN) ; Gallas, A. (Santiago de Compostela U.) ; Hombach, C. (Manchester U.) et al.
While designed primarily for X-ray imaging applications, the Medipix3 ASIC can also be used for charged-particle tracking. In this work, results from a beam test at the CERN SPS with irradiated and non-irradiated sensors are presented and shown to be in agreement with simulation, demonstrating the suitability of the Medipix3 ASIC as a tool for characterising pixel sensors..
arXiv:1509.02387; LHCB-PUB-2016-002; CERN-LHCb-PUB-2016-002; CERN-LHCb-PUB-2016-002.- 2016-01-21 - 13 p. - Published in : JINST 11 (2016) P01011 Fulltext: LHCb-PUB-2016-002 - PDF; 10.1088_1748-0221_11_01_P01011 - PDF; arXiv:1509.02387 - PDF; IOP: PDF; External link: Preprint
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An approach to new physics at LHCb: study of penguin pollution to $\phi_s$($B_s^0{\to}J/\psi{\phi}$) using $B_s^0{\to}J/\psi{\bar{K}^{*0}}$ decays, and search for a light $A_1^0$ Higgs boson in the NMSSM. / Vazquez Sierra, Carlos
This LHCb Thesis consists of three main parts [...]
CERN-THESIS-2016-281 - 266 p.

[] Fulltext
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3.
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Test of lepton universality with $B^{0} \rightarrow K^{*0}\ell^{+}\ell^{-}$ decays / LHCb Collaboration
A test of lepton universality, performed by measuring the ratio of the branching fractions of the $B^{0} \rightarrow K^{*0}\mu^{+}\mu^{-}$ and $B^{0} \rightarrow K^{*0}e^{+}e^{-}$ decays, $R_{K^{*0}}$, is presented. The $K^{*0}$ meson is reconstructed in the final state $K^{+}\pi^{-}$, which is required to have an invariant mass within 100$\mathrm{\,MeV}c^2$ of the known $K^{*}(892)^{0}$ mass. [...]
arXiv:1705.05802; LHCB-PAPER-2017-013; CERN-EP-2017-100; LHCB-PAPER-2017-013.- Geneva : CERN, 2017-08-16 - 31 p. Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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Probing active-edge silicon sensors using a high precision telescope / Akiba, K (Rio de Janeiro Federal U.) ; Artuso, M (Syracuse U.) ; van Beveren, V (NIKHEF, Amsterdam) ; van Beuzekom, M (NIKHEF, Amsterdam) ; Boterenbrood, H (NIKHEF, Amsterdam) ; Buytaert, J (CERN) ; Collins, P (CERN) ; Dumps, R (CERN) ; van der Heijden, B (NIKHEF, Amsterdam) ; Hombach, C (Manchester U.) et al.
The performance of prototype active-edge VTT sensors bump-bonded to the Timepix ASIC is presented. Non-irradiated sensors of thicknesses 100–200 μm and pixel-to-edge distances of 50 μm and 100 μm were probed with a beam of charged hadrons with sub-pixel precision using the Timepix telescope assembled at the SPS at CERN. [...]
2015 - 8 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 777 (2015) 110-117 Elsevier Open Access article: PDF;
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First observation of a baryonic $B_s^0$ decay / LHCb Collaboration
We report the first observation of a baryonic $B_s^0$ decay, $B_s^0 \to p \kern 0.1em\overline{\kern -0.1em\Lambda} K^-$, using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of $3.0\,\mathrm{fb}^{-1}$. The branching fraction is measured to be $ \mathcal{B}(B_s^0 \to p \kern 0.1em\overline{\kern -0.1em\Lambda} K^-) + \mathcal{B}(B_s^0 \to \bar{p} \Lambda K^+) = \left[5.46 \pm 0.61 \pm 0.57 \pm 0.50 (\mathcal{B}) \pm 0.32 (f_s/f_d)\right]\times 10^{-6}, $ where the first uncertainty is statistical and the second systematic, the third uncertainty accounts for the experimental uncertainty on the branching fraction of the $B^0 \to p \kern 0.1em\overline{\kern -0.1em\Lambda} \pi^-$ decay used for normalization, and the fourth uncertainty relates to the knowledge of the ratio of $b$-quark hadronization probabilities $f_s/f_d$..
arXiv:1704.07908; LHCB-PAPER-2017-012; CERN-EP-2017-067.- 2017-07-25 - 10 p. - Published in : Phys. Rev. Lett. 119 (2017) 041802 Fulltext: arXiv:1704.07908 - PDF; 10.1103_PhysRevLett.119.041802 - PDF; Related data file(s): ZIP; Supplementary information: ZIP; External link: Figures, tables and other information
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Search for long-lived scalar particles in $B^+ \to K^+ \chi (\mu^+\mu^-)$ decays / LHCb Collaboration
A search for a long-lived scalar particle $\chi$ is performed, looking for the decay ${B^+ \to K^+ \chi}$ with ${\chi \to \mu^+\mu^-}$ in $pp$ collision data corresponding to an integrated luminosity of $3\, {\rm fb}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of $\sqrt{s}=7$ and 8$\,$TeV. This new scalar particle, predicted by Hidden Sector models, is assumed to have a narrow width. [...]
arXiv:1612.07818; CERN-EP-2016-302; LHCB-PAPER-2016-052.- 2017-04-14 - 9 p. - Published in : Phys. Rev. D 95 (2017) 071101 APS Open Access article: PDF; Figures: ZIP; Fulltext: arXiv:1612.07818 - PDF; 10.1103_PhysRevD.95.071101 - PDF; Supplementary information: ZIP; External link: Figures, tables and other information
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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 $\Upsilon$ 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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