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CERN Document Server 找到 93 筆記錄  1 - 10下一個最後  跳到記錄: 檢索需時 0.63 秒. 
1.
Observation of the decay $B_{s}^{0} \to \eta_{c} \phi$ and evidence for $B_{s}^{0} \to \eta_{c} \pi^{+} \pi^{-} $ / LHCb Collaboration
A study of $B^{0}_{s} \to \eta_{c} \phi$ and $B^{0}_{s} \to \eta_{c} \pi^{+}\pi^{-}$ decays is performed using $pp$ collision data corresponding to an integrated luminosity of 3.0$\,\rm fb^{-1}$, collected with the LHCb detector in Run~1 of the LHC. The observation of the decay $B^{0}_{s} \to \eta_{c} \phi$ is reported, where the $\eta_{c}$ meson is reconstructed in the $p\bar p$, $K^+K^-\pi^+\pi^-$, $\pi^+\pi^-\pi^+\pi^-$ and $K^+K^-K^+K^-$ decay modes and the $\phi(1020)$ in the $K^+ K^-$ decay mode. [...]
arXiv:1702.08048; CERN-EP-2017-026; LHCB-PAPER-2016-056.- 2017-07-05 - 30 p. - Published in : JHEP 07 (2017) 021 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; External link: Figures, tables and other information
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2.
Observation of the $\varXi^{-}_{b}\to J/\psi\varLambda K^{-}$ decay / LHCb Collaboration
The observation of the decay $\varXi_{b}^{-}\to J/\psi\varLambda K^{-}$ is reported, using a data sample corresponding to an integrated luminosity of $3~\mathrm{fb}^{-1}$, collected by the LHCb detector in $pp$ collisions at centre-of-mass energies of $7$ and $8~\mathrm{TeV}$. The production rate of $\varXi_{b}^{-}$ baryons detected in the decay $\varXi_{b}^{-}\to J/\psi\varLambda K^{-}$ is measured relative to that of $\varLambda_{b}^{0}$ baryons using the decay $\varLambda_{b}^{0}\to J/\psi \varLambda$ [...]
arXiv:1701.05274; CERN-EP-2016-318; LHCB-PAPER-2016-053; LHCB-PAPER-2016-053.- Geneva : CERN, 2017-09-10 - 9 p. - Published in : Phys. Lett. B 772 (2017) 265-273 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Figures, tables and other information
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3.
Study of $J/\psi$ production in jets / LHCb Collaboration
The production of $J/\psi$ mesons in jets is studied in the forward region of proton-proton collisions using data collected with the LHCb detector at a center-of-mass energy of 13 TeV. The fraction of the jet transverse momentum carried by the $J/\psi$ meson, $z \equiv p_{\rm T}(J/\psi)/p_{\rm T}({\rm jet})$, is measured using jets with $p_{\rm T}({\rm jet}) > 20$ GeV in the pseudorapidity range $2.5 < \eta({\rm jet}) < 4.0$. [...]
arXiv:1701.05116; LHCB-PAPER-2016-064; CERN-EP-2017-006; LHCB-PAPER-2016-064.- Geneva : CERN, 2017-05-08 - 11 p. - Published in : Phys. Rev. Lett. 118 (2017) 192001 Fulltext: 10.1103_PhysRevLett.118.192001 - PDF; arXiv:1701.05116 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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4.
Measurement of $CP$ asymmetries in $D^{\pm}\rightarrow \eta^{\prime} \pi^{\pm}$ and $D_s^{\pm}\rightarrow \eta^{\prime} \pi^{\pm}$ decays / LHCb Collaboration
A search for $CP$ violation in $D^{\pm}\rightarrow \eta^{\prime} \pi^{\pm}$ and $D^{\pm}_{s}\rightarrow \eta^{\prime} \pi^{\pm}$ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of $3$ fb$^{-1}$, recorded by the LHCb experiment at centre-of-mass energies of $7$ and $8$ TeV. The measured $CP$-violating charge asymmetries are $A_{CP}(D^{\pm} \rightarrow \eta^{\prime} \pi^{\pm})=(-0.61\pm 0.72 \pm 0.53 \pm 0.12)\%$ and $A_{CP}(D^{\pm}_{s}\rightarrow \eta^{\prime} \pi^{\pm})=(-0.82\pm 0.36 \pm 0.22 \pm 0.27)\%$, where the first uncertainties are statistical, the second systematic, and the third are the uncertainties on the $A_{CP}(D^{\pm} \rightarrow K^0_S \pi^{\pm})$ and $A_{CP}(D^{\pm}_{s}\rightarrow \phi \pi^{\pm})$ measurements used for calibration. [...]
arXiv:1701.01871; LHCB-PAPER-2016-041; CERN-EP-2016-315.- Geneva : CERN, 2017-08-10 - 10 p. - Published in : Phys. Lett. B 771 (2017) 21-30 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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5.
Observation of $B_{c}^{+} \rightarrow D^{0} K^{+}$ decays / LHCb Collaboration
Using proton-proton collision data corresponding to an integrated luminosity of 3.0 fb$^{-1}$, recorded by the LHCb detector at centre-of-mass energies of 7 and 8 TeV, the $B_{c}^{+} \rightarrow D^{0} K^{+}$ decay is observed with a statistical significance of 5.1 standard deviations. By normalising to $B^{+} \rightarrow \bar{D}^{0} \pi^{+}$ decays, a measurement of the branching fraction multiplied by the production rates for $B_{c}^{+}$ relative to $B^{+}$ mesons in the LHCb acceptance is obtained, R_{D^{0} K} = \frac{f_{c}}{f_{u}}\times\mathcal{B}(B_{c}^{+} \rightarrow D^{0} K^{+}) = (9.3\,^{+2.8}_{-2.5} \pm 0.6) \times 10^{-7}\,where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1701.01856; LHCB-PAPER-2016-058; CERN-EP-2016-314; LHCB-PAPER-2016-058.- Geneva : CERN, 2017-03-15 - 9 p. - Published in : Phys. Rev. Lett. 118 (2017) 111803 APS Open Access article: PDF; Fulltext: arXiv:1701.01856 - PDF; 10.1103_PhysRevLett.118.111803 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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6.
Search for the $B^{0}_{s} \to \eta^{\prime}\phi$ decay / LHCb Collaboration
A search for the charmless $B^{0}_{s} \to \eta^{\prime}\phi$ decay is performed using $pp$ collision data collected by the LHCb experiment at centre-of-mass energies of $7$ and $8$ TeV, corresponding to an integrated luminosity of 3 fb$^{-1}$. No signal is observed and upper limits on the $B^{0}_{s} \to \eta^{\prime}\phi$ branching fraction are set to $0.82\times 10^{-6}$ at $90\%$ and $1.01\times 10^{-6}$ at $95\%$ confidence level..
arXiv:1612.08110; CERN-EP-2016-304; LHCB-PAPER-2016-060.- 2017-05-31 - 18 p. - Published in : JHEP 05 (2017) 158 Article from SCOAP3: PDF; Fulltext: PDF; External link: Figures, tables and other information
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7.
Measurement of the $J/\psi$ pair production cross-section in $pp$ collisions at $\sqrt{s} = 13 \,{\mathrm{TeV}}$ / LHCb Collaboration
The production cross-section of $J/\psi$ pairs is measured using a data sample of $pp$ collisions collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s} = 13 \,{\mathrm{TeV}}$, corresponding to an integrated luminosity of $279 \pm 11 \,{\mathrm{pb^{-1}}}$. The measurement is performed for $J/\psi$ mesons with a transverse momentum of less than $10 \,{\mathrm{GeV}}/c$ in the rapidity range $2.0<y<4.5$. [...]
arXiv:1612.07451; CERN-EP-2016-307; LHCB-PAPER-2016-057.- 2017-06-09 - 38 p.
Article from SCOAP3: PDF; Fulltext: DoubleJpsi_PAPER_v12 - PDF; arXiv:1612.07451 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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8.
Observation of $B_{c}^{+} \to J/\psi D^{(*)} K^{(*)}$ decays / LHCb Collaboration
A search for the decays $B_c^+ \to J/\psi D^{(*)0} K^+$ and $B_c^+ \to J/\psi D^{(*)+} K^{*0}$ is performed with data collected at the LHCb experiment corresponding to an integrated luminosity of 3 fb$^{-1}$. The decays $B_c^+ \to J/\psi D^0 K^+$ and $B_c^+ \to J/\psi D^{*0} K^+$ are observed for the first time, while first evidence is reported for the $B_c^+ \to J/\psi D^{*+} K^{*0}$ and $B_c^+ \to J/\psi D^+ K^{*0}$ decays. [...]
arXiv:1612.07421; CERN-EP-2016-303; LHCB-PAPER-2016-055.- Geneva : CERN, 2017-02-21 - 12 p. - Published in : Phys. Rev. D 95 (2017) 032005 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.95.032005 - PDF; arXiv:1612.07421 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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9.
Measurement of the phase difference between short- and long-distance amplitudes in the $B^{+}\to K^{+}\mu^{+}\mu^{-}$ decay / LHCb Collaboration
A measurement of the phase difference between the short- and long-distance contributions to the $B^{+}\to K^{+}\mu^{+}\mu^{-}$ decay is performed by analysing the dimuon mass distribution. The analysis is based on $pp$ collision data corresponding to an integrated luminosity of 3 $\rm fb^{-1}$ collected by the LHCb experiment in 2011 and 2012. [...]
arXiv:1612.06764; CERN-EP-2016-301; LHCB-PAPER-2016-045.- Geneva : CERN, 2017-03-16 - 25 p. - Published in : Eur. Phys. J. C 77 (2017) 161 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Figures, tables and other information
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10.
Measurement of the ratio of branching fractions and difference in $CP$ asymmetries of the decays $B^+\to J/\psi\pi^+$ and $B^+\to J/\psi K^+$ / LHCb Collaboration
The ratio of branching fractions and the difference in $CP$ asymmetries of the decays $B^+\to J/\psi \pi^+$ and $B^+\to J/\psi K^+$ are measured using a data sample of $pp$ collisions collected by the LHCb experiment, corresponding to an integrated luminosity of $3~{{\,\mbox{fb}^{-1}}}$ at centre-of-mass energies of 7 and $8~\mathrm{\,Te\kern -0.1em V}$. The results are \begin{equation*} {\mathcal{B}(B^+\to J/\psi \pi^+)\over\mathcal{B}(B^+\to J/\psi K^+)}=(3.83\pm0.03\pm0.03)\times10^{-2}\,, \end{equation*} \begin{equation*} \mathcal{A}^{CP}(B^+\to J/\psi \pi^+)-\mathcal{A}^{CP}(B^+\to J/\psi K^+)=(1.82\pm0.86\pm0.14)\times10^{-2}, \end{equation*} where the first uncertainties are statistical and the second are systematic [...]
arXiv:1612.06116; LHCB-PAPER-2016-051; CERN-EP-2016-298.- Geneva : CERN, 2017-03-07 - 16 p. - Published in : JHEP 03 (2017) 036 Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Figures, tables and other information
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