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CERN Document Server 找到 282 筆記錄  1 - 10下一個最後  跳到記錄: 檢索需時 0.57 秒. 
1.
Novel method for measuring charm-mixing parameters using multibody decays / Di Canto, A. (CERN) ; Garra Ticó, J. (Cambridge U.) ; Gershon, T. (Warwick U.) ; Jurik, N. (Oxford U.) ; Martinelli, M. (CERN) ; Pilař, T. (Warwick U.) ; Stahl, S. (CERN) ; Tonelli, D. (INFN, Trieste)
We propose a novel method to measure flavor-oscillations and charge-parity (CP) violation in charm mixing. The approach uses multibody charm decays, such as $D^0\to K_S^0\pi^+\pi^-$, and avoids the need for a fit of the decay amplitudes while suppressing biases due to nonuniform signal-reconstruction efficiencies as functions of phase space and decay time [...]
arXiv:1811.01032.- 2019-01-17 - 16 p. - Published in : Phys. Rev. D 99 (2019) 012007 Article from SCOAP3: PDF;
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2.
A precise measurement of the $B^0$ meson oscillation frequency / LHCb collaboration
The oscillation frequency, $\Delta m_d$, of $B^0$ mesons is measured using semileptonic decays with a $D^-$ or $D^{*-}$ meson in the final state, in a data sample of $pp$ collisions collected by the LHCb detector corresponding to an integrated luminosity of 3.0$\mbox{fb}^{-1}$. A combination of the two decay modes gives $\Delta m_d = (505.0 \pm 2.1 \pm 1.0) \rm \,ns^{-1}$, where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1604.03475; LHCB-PAPER-2015-031; CERN-EP-2016-084; LHCB-PAPER-2015-031; CERN-EP-2016-084.- Geneva : CERN, 2016-07-21 - 27 p. - Published in : Eur. Phys. J. C 76 (2016) 412 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information
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3.
Observation of the $B_s^0 \rightarrow J/\psi \phi \phi$ decay / LHCb collaboration
The $B_s^0 \rightarrow J/\psi \phi \phi$ decay is observed in $pp$ collision data corresponding to an integrated luminosity of 3 fb$^{-1}$ recorded by the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV. This is the first observation of this decay channel, with a statistical significance of 15 standard deviations. [...]
arXiv:1601.05284; LHCB-PAPER-2015-033; CERN-EP-2016-006; LHCB-PAPER-2015-033; CERN-EP-2016-006.- Geneva : CERN, 2016 - 20 p. - Published in : JHEP 03 (2016) 040 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Figures, tables and other information
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4.
Measurements of long-range near-side angular correlations in $\sqrt{s_{\text{NN}}}=5$TeV proton-lead collisions in the forward region / LHCb collaboration
Two-particle angular correlations are studied in proton-lead collisions at a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{\text{NN}}}=5$TeV, collected with the LHCb detector at the LHC. The analysis is based on data recorded in two beam configurations, in which either the direction of the proton or that of the lead ion is analysed. [...]
arXiv:1512.00439; LHCB-PAPER-2015-040; CERN-PH-EP-2015-308; LHCB-PAPER-2015-040; CERN-PH-EP-2015-308.- Geneva : CERN, 2016-11-10 - 11 p. - Published in : Phys. Lett. B 762 (2016) 473-483 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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5.
Search for the lepton-flavour violating decay $D^0 \to e^\pm\mu^\mp$ / LHCb Collaboration
A search for the lepton-flavour violating decay $D^0 \to e^\pm \mu^\mp$ is made with a dataset corresponding to an integrated luminosity of $3.0$ fb$^{-1}$ of proton-proton collisions at centre-of-mass energies of $7$ TeV and $8$ TeV, collected by the LHCb experiment. Candidate $D^0$ mesons are selected using the decay $D^{*+} \to D^0 \pi^+$ and the $D^0 \to e^\pm \mu^\mp$ branching fraction is measured using the decay mode $D^0 \to K^- \pi^+$ as a normalisation channel. [...]
arXiv:1512.00322; CERN-PH-EP-2015-306; LHCb-PAPER-2015-048; LHCB-PAPER-2015-048; LHCB-PAPER-2015-048; CERN-PH-EP-2015-306.- Geneva : CERN, 2016-03-10 - 9 p. - Published in : Phys. Lett. B 754 (2016) 167 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: 1512.00322 - PDF; arXiv:1512.00322 - PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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6.
First observation of the decay $D^{0}\rightarrow K^{-}\pi^{+}\mu^{+}\mu^{-}$ in the $\rho^{0}$-$\omega$ region of the dimuon mass spectrum / LHCb collaboration
A study of the decay $D^{0}\rightarrow K^{-}\pi^{+}\mu^{+}\mu^{-}$ is performed using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2.0 fb$^{-1}$. Decay candidates with muon pairs that have an invariant mass in the range 675--875 MeV$/c^2$ are considered. [...]
arXiv:1510.08367; LHCB-PAPER-2015-043; CERN-PH-EP-2015-283.- Geneva : CERN, 2016-06-10 - 10 p. - Published in : Phys. Lett. B 757 (2016) 558 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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7.
Production of associated $\Upsilon$ and open charm hadrons in $pp$ collisions at $\sqrt{s}=7$ and $8$ TeV via double parton scattering / LHCb collaboration
Associated production of bottomonia and open charm hadrons in $pp$ collisions at $\sqrt{s}=7$ and $8$TeV is observed using data corresponding to an integrated luminosity of 3$fb^{-1}$ accumulated with the LHCb detector. The observation of five combinations, $\Upsilon(1S)D^0$, $\Upsilon(2S)D^0$, $\Upsilon(1S)D^+$, $\Upsilon(2S)D^+$ and $\Upsilon(1S)D^+_{s}$, is reported. [...]
arXiv:1510.05949; CERN-PH-EP-2015-279; CERN-LHCB-PAPER-2015-046; LHCB-PAPER-2015-046; CERN-PH-EP-2015-279; LHCB-PAPER-2015-046.- Geneva : CERN, 2016-07-11 - 36 p. - Published in : JHEP 07 (2016) 052 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: Figures, tables and other information
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8.
Search for the rare decays $B^{0}\to J/\psi \gamma$ and $B^{0}_{s} \to J/\psi \gamma$ / LHCb collaboration
A search for the rare decay of a $B^{0}$ or $B^{0}_{s}$ meson into the final state $J/\psi\gamma$ is performed, using data collected by the LHCb experiment in $pp$ collisions at $\sqrt{s}=7$ and $8$ TeV, corresponding to an integrated luminosity of 3 fb$^{-1}$. The observed number of signal candidates is consistent with a background-only hypothesis. [...]
arXiv:1510.04866; LHCB-PAPER-2015-044; CERN-PH-EP-2015-276; LHCB-PAPER-2015-044; CERN-PH-EP-2015-276.- Geneva : CERN, 2015-12-07 - 9 p. - Published in : Phys. Rev. D 92 (2015) 112002 APS Open Access article: PDF; Fulltext: arXiv:1510.04866 - PDF; 10.1103_PhysRevD.92.112002 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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9.
Evidence for the strangeness-changing weak decay $\Xi_b^-\to\Lambda_b^0\pi^-$ / LHCb collaboration
Using a $pp$ collision data sample corresponding to an integrated luminosity of 3.0~fb$^{-1}$, collected by the LHCb detector, we present the first search for the strangeness-changing weak decay $\Xi_b^-\to\Lambda_b^0\pi^-$. No $b$ hadron decay of this type has been seen before. [...]
arXiv:1510.03829; LHCB-PAPER-2015-047; CERN-PH-EP-2015-277; LHCB-PAPER-2015-047; CERN-PH-EP-2015-277.- 2015-12-11 - 10 p. - Published in : Phys. Rev. Lett. 115 (2015) 241801 APS Open Access article: PDF; Figures: ZIP; Fulltext: 10.1103_PhysRevLett.115.241801 - PDF; arXiv:1510.03829 - PDF; External link: Figures, tables and other information
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10.
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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