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CERN Document Server 240 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 0.72 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.
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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3.
Measurement of the inelastic $pp$ cross-section at a centre-of-mass energy of $\sqrt{s}=7$ TeV / LHCb Collaboration
The cross-section for inelastic proton-proton collisions, with at least one prompt long-lived charged particle of transverse momentum $p_{\rm T}>0.2$ GeV/$c$ in the pseudorapidity range $2.0<\eta<4.5$, is measured by the LHCb experiment at a centre-of-mass energy of $\sqrt{s}=7$ TeV. The cross-section in this kinematic range is determined to be $\sigma_{\rm inel}^{\rm acc} = 55.0 \pm 2.4$ mb within the spectrometer acceptance with an experimental uncertainty that is dominated by systematic contributions. [...]
arXiv:1412.2500; CERN-PH-EP-2014-285; LHCB-PAPER-2014-057; LHCB-PAPER-2014-057; CERN-PH-EP-2014-285.- Geneva : CERN, 2015-02-19 - 15 p. - Published in : JHEP 02 (2015) 129 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference
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4.
Measurement of the lifetime of the $B_c^+$ meson using the $B_c^+ \rightarrow J/\psi\pi^+$ decay mode / LHCb collaboration
The difference in total widths between the $B_c^+$ and $B^+$ mesons is measured using 3.0fb$^{-1}$ of data collected by the LHCb experiment in 7 and 8 TeV centre-of-mass energy proton-proton collisions at the LHC. Through the study of the time evolution of $B_c^+ \rightarrow J/\psi \pi^+$ and $B^+\rightarrow J/\psi K^+$ decays, the width difference is measured to be $ \Delta\Gamma \equiv \Gamma_{B_c^+} - \Gamma_{B^+} = 4.46 \pm 0.14 \pm 0.07mm^{-1}c,$ where the first uncertainty is statistical and the second systematic. [...]
arXiv:1411.6899; CERN-PH-EP-2014-283; LHCB-PAPER-2014-060; CERN-PH-EP-2014-283; LHCB-PAPER-2014-060.- Geneva : CERN, 2015-03-06 - 9 p. - Published in : Phys. Lett. B 742 (2015) 29-37 Article from SCOAP3: PDF; Elsevier Open Access article : PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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5.
Observation of two new $\Xi_b^-$ baryon resonances / LHCb collaboration
Two structures are observed close to the kinematic threshold in the $\Xi_b^0\pi^-$ mass spectrum in a sample of proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb$^{-1}$ recorded by the LHCb experiment. In the quark model, two baryonic resonances with quark content $bds$ are expected in this mass region: the spin-parity $J^P = \frac{1}{2}^+$ and $J^P=\frac{3}{2}^+$ states, denoted $\Xi_b^{\prime -}$ and $\Xi_b^{*-}$. [...]
arXiv:1411.4849; CERN-PH-EP-2014-279; LHCB-PAPER-2014-061; CERN-PH-EP-2014-279; LHCB-PAPER-2014-061.- Geneva : CERN, 2015-02-10 - 9 p. - Published in : Phys. Rev. Lett. 114 (2015) 062004 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External links: Interactions.org article; LHCb website article; Press Release; Symmetry Magazine article
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6.
Observation of the rare $B^0_s\to\mu^+\mu^-$ decay from the combined analysis of CMS and LHCb data / CMS and LHCb Collaborations
A joint measurement is presented of the branching fractions $B^0_s\to\mu^+\mu^-$ and $B^0\to\mu^+\mu^-$ in proton-proton collisions at the LHC by the CMS and LHCb experiments. The data samples were collected in 2011 at a centre-of-mass energy of 7 TeV, and in 2012 at 8 TeV. [...]
arXiv:1411.4413; CERN-PH-EP-2014-220; CMS-BPH-13-007; LHCB-PAPER-2014-049; CERN-PH-EP-2014-220; CMS-BPH-13-007; LHCB-PAPER-2014-049.- 2015-05-13 - 46 p. - Published in : Nature 522 (2015) 68-72 Fulltext: openaccess_nature14474 - PDF; arXiv:1411.4413 - PDF; Fulltext from Publisher: 10.1038_nature14474 - PDF; nature14474 - PDF; Related data file(s): ZIP; External links: Interactions.org article; Fermilab News article; Los Angeles Times article
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7.
Precision measurement of $CP$ violation in $B_s^0 \to J/\psi K^+K^-$ decays / LHCb Collaboration
The time-dependent $CP$ asymmetry in $B_s^0 \to J/\psi K^+K^-$ decays is measured using $pp$ collision data, corresponding to an integrated luminosity of $3.0$fb$^{-1}$, collected with the LHCb detector at centre-of-mass energies of $7$ and $8$TeV. In a sample of 96 000 $B_s^0 \to J/\psi K^+K^-$ decays, the $CP$-violating phase $\phi_s$ is measured, as well as the decay widths $\Gamma_{L}$ and $\Gamma_{H}$ of the light and heavy mass eigenstates of the $B_s^0-\bar{B}_s^0$ system. [...]
arXiv:1411.3104; LHCB-PAPER-2014-059; CERN-PH-EP-2014-271; LHCB-PAPER-2014-059; CERN-PH-EP-2014-271.- Geneva : CERN, 2015-01-30 - 9 p. - Published in : Phys. Rev. Lett. 114 (2015) 041801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
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8.
Measurement of $B_c^+$ production in proton-proton collisions at $\sqrt{s}=8$ TeV / LHCb Collaboration
Production of $B_c^+$ mesons in proton-proton collisions at a center-of-mass energy of 8 TeV is studied with data corresponding to an integrated luminosity of $2.0~{\rm fb^{-1}}$ recorded by the LHCb experiment. The ratio of production cross-sections times branching fractions between the $B_c^+\to J/\psi \pi^+$ and $B^+\to J/\psi K^+$ decays is measured as a function of transverse momentum and rapidity in the regions $0 < p_{\rm T} < 20{\rm GeV}/c$ and $2.0 < y < 4.5$. [...]
arXiv:1411.2943; CERN-PH-EP-2014-269; LHCB-PAPER-2014-050; LHCB-PAPER-2014-050; CERN-PH-EP-2014-269.- Geneva : CERN, 2015-04-02 - 9 p. - Published in : Phys. Rev. Lett. 114 (2015) 132001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data files(s): ZIP; External link: Preprint
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9.
Measurement of the CP-violating phase $\beta$ in $B^0\rightarrow J/\psi \pi^+\pi^-$ decays and limits on penguin effects / LHCb Collaboration
Time-dependent CP violation is measured in the $B^0\rightarrow J/\psi\pi^+\pi^-$ channel for each $\pi^+\pi^-$ resonant final state using data collected with an integrated luminosity of 3.0 fb$^{-1}$ in $pp$ collisions using the LHCb detector. The final state with the largest rate, $J/\psi\rho^0(770)$, is used to measure the CP-violating angle $2\beta^{\rm eff}$ to be $(41.7\pm 9.6_{-6.3}^{+2.8})^{\circ}$. [...]
arXiv:1411.1634; CERN-PH-EP-2014-268; LHCB-PAPER-2014-058; LHCB-PAPER-2014-058; CERN-PH-EP-2014-268.- Geneva : CERN, 2015-03-06 - 12 p. - Published in : Phys. Lett. B 742 (2015) 38-49 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
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10.
Study of $\eta-\eta'$ mixing from measurement of $B^0_{(s)}\to J/\psi\eta^{(')}$ decay rates / LHCb Collaboration
A study of $B^0$and $B^0_s$ meson decays into $J/\psi\eta$ and $J/\psi\eta^{\prime}$ final states is performed using a data set of proton-proton collisions at centre-of-mass energies of 7 and 8TeV, collected by the LHCb experiment and corresponding to 3.0fb$^{-1}$ of integrated luminosity. The decay $B^0 \rightarrow J/\psi \eta^{\prime}$ is observed for the first time. [...]
arXiv:1411.0943; CERN-PH-EP-2014-266; LHCB-PAPER-2014-056; LHCB-PAPER-2014-056; CERN-PH-EP-2014-266.- Geneva : CERN, 2015-01-08 - 26 p. - Published in : JHEP 01 (2015) 024 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF;
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55 Jaton, P.
75 Jaton, Pierre
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