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CERN Document Server 2,050 notices trouvées  1 - 10suivantfin  aller vers la notice: La recherche a duré 3.77 secondes. 
1.
(100)
Measurement of the branching fractions of the decays $B^0_s \rightarrow \overline{D}^0 K^- \pi^+$ and $B^0 \rightarrow \overline{D}^0 K^+ \pi^-$ / LHCb Collaboration
The first observation of the decay $B^0_s \rightarrow \overline{D}^0 K^-\pi^+$ is reported. The analysis is based on a data sample, corresponding to an integrated luminosity of $1.0 {\mbox{fb}^{-1}}$ of $pp$ collisions, collected with the LHCb detector [...]
arXiv:1304.6317; LHCB-PAPER-2013-022; CERN-PH-EP-2013-070; LHCB-PAPER-2013-022; CERN-PH-EP-2013-070.- Geneva : CERN, 2013-06-20 - 10 p. - Published in : Phys. Rev. D 87 (2013) 112009 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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2.
(91)
Measurement of $D^{0}-\bar{D}^0$ mixing parameters and search for CP violation using $D^{0} \to K^{+}\pi^{-}$ decays / LHCb collaboration
Measurements of charm mixing parameters from the decay-time-dependent ratio of $D^0 \to K^+ \pi^-$ to $D^0 \to K^- \pi^+$ rates and the charge-conjugate ratio are reported. The analysis uses data, corresponding to 3 fb$^{-1}$ of integrated luminosity, from proton-proton collisions at 7 and 8 TeV center-of-mass energies recorded by the LHCb experiment. [...]
arXiv:1309.6534; CERN-PH-EP-2013-176; LHCB-PAPER-2013-053; CERN-PH-EP-2013-176; LHCB-PAPER-2013-053.- Geneva : CERN, 2013-12-18 - 9 p. - Published in : Phys. Rev. Lett. 111 (2013) 251801 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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3.
(86)
Differential branching fraction and angular analysis of the decay $B_s^0 \to \phi \mu^+\mu^-$ / LHCb Collaboration
The determination of the differential branching fraction and the first angular analysis of the decay $B_s^0\to\phi\mu^{+}\mu^{-}$ are presented using data, corresponding to an integrated luminosity of $1.0\,{\rm fb}^{-1}$, collected by the LHCb experiment at $\sqrt{s}=7\,{\rm TeV}$. The differential branching fraction is determined in bins of $q^{2}$, the invariant dimuon mass squared. [...]
arXiv:1305.2168; CERN-PH-EP-2013-078; LHCB-PAPER-2013-017; CERN-PH-EP-2013-078; LHCB-PAPER-2013-017.- Geneva : CERN, 2013-07-11 - 18 p. - Published in : JHEP 07 (2013) 084 APS published version, local copy: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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4.
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Measurement of the forward energy flow in $pp$ collisions at $\sqrt{s}$= 7 TeV / LHCb Collaboration
The energy flow created in pp collisions at $\sqrt{s}$=7 TeV is studied within the pseudorapidity range 1.9<eta<4.9 with data collected by the LHCb experiment. The measurements are performed for inclusive minimum-bias interactions, hard scattering processes and events with an enhanced or suppressed diffractive contribution. [...]
arXiv:1212.4755; CERN-PH-EP-2012-346; LHCB-PAPER-2012-034; CERN-PH-EP-2012-346; LHCB-PAPER-2012-034.- Geneva : CERN, 2013 - 17 p. - Published in : Eur. Phys. J. C 73 (2013) 2421 APS published version, local copy: PDF; Fulltext: PDF; Related data (files): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference
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5.
(86)
Production of $J/\psi$ and $\Upsilon$ mesons in $pp$ collisions at $\sqrt{s}$ = 8 TeV / LHCb Collaboration
The production of $J/\psi$ and $\Upsilon$ mesons in $pp$ collisions at $\sqrt{s}$ = 8 TeV is studied with the LHCb detector. The $J/\psi$ and $\Upsilon$ mesons are reconstructed in the $\mu^+ \mu^-$ decay mode and the signal yields are determined to fit to the $\mu^+ \mu^-$ invariant mass distributions. [...]
arXiv:1304.6977; CERN-PH-EP-2013-071; LHCB-PAPER-2013-016; CERN-PH-EP-2013-071; LHCB-PAPER-2013-016.- Geneva : CERN, 2013-06 - 35 p. - Published in : JHEP 06 (2013) 064 APS published version, local copy: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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6.
(86)
First observation of $CP$ violation in the decays of $B^0_s$ mesons / LHCb Collaboration
Using $pp$ collision data corresponding to an integrated luminosity of $1.0 \mathrm{fb}^{-1}$ and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct $C\!P$ violation in $B^0_s \to K^-\pi^+$ decays, $A_{C\!P}(B^0_s \rightarrow K^- \pi^+)=0.27 \pm 0.04\,\mathrm{(stat)} \pm 0.01\,\mathrm{(syst)}$, with significance exceeding 5 standard deviations. This is the first observation of $C\!P$ violation in the decays of $B^0_s$ mesons. [...]
arXiv:1304.6173; CERN-PH-EP-2013-068; LHCB-PAPER-2013-018; CERN-PH-EP-2013-068; LHCB-PAPER-2013-018.- Geneva : CERN, 2013-05-30 - 9 p. - Published in : Phys. Rev. Lett. 110 (2013) 221601 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External links: Interactions.org article; Physics Synopsis
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7.
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Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb / LHCb Collaboration
Searches for the lepton flavour violating decay $\tau^-\to \mu^-\mu^+\mu^-$ and the lepton flavour and baryon number violating decays $\tau^-\to \bar{p}\mu^+\mu^-$ and $\tau^-\to p\mu^-\mu^-$ have been carried out using proton-proton collision data, corresponding to an integrated luminosity of $1.0$ fb$^{-1}$, taken by the LHCb experiment at $\sqrt{s} = 7$ TeV. No evidence has been found for any signal, and limits have been set at $90\%$ confidence level on the branching fractions: $\cal B(\tau^-\to \mu^-\mu^+\mu^-) < 8.0 \times 10^{-8}$, $\cal B(\tau^-\to \bar{p}\mu^+\mu^-) < 3.3 \times 10^{-7}$ and $\cal B(\tau^-\to p\mu^-\mu^-) < 4.4 \times 10^{-7}$. [...]
arXiv:1304.4518; LHCB-PAPER-2013-014; CERN-PH-EP-2013-062; LHCB-PAPER-2013-014; CERN-PH-EP-2013-062.- Geneva : CERN, 2013-07-09 - 10 p. - Published in : Phys. Lett. B 724 (2013) 36-45 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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8.
(86)
Measurement of the effective $B_s^0\rightarrow J/\psi K_{\mathrm S}^0$ lifetime / LHCb Collaboration
This paper reports the first measurement of the effective $B_s^0\rightarrow J/\psi K_{\mathrm S}^0$ lifetime and an updated measurement of its time-integrated branching fraction. Both measurements are performed with a data sample, corresponding to an integrated luminosity of $1.0\:\text{fb}^{-1}$ of $pp$ collisions, recorded by the LHCb experiment in 2011 at a centre-of-mass energy of $7\:\text{TeV}$. [...]
arXiv:1304.4500; CERN-PH-EP-2013-063; LHCB-PAPER-2013-015; CERN-PH-EP-2013-063; LHCB-PAPER-2013-015.- Geneva : CERN, 2013-08-11 - 21 p. - Published in : Nucl. Phys. B 873 (2013) 275-292 APS published version, local copy: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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9.
(86)
Measurement of the polarization amplitudes in $B^0 \to J/\psi K^{*}(892)^0$ decays / LHCb collaboration
An analysis of the decay $B^0 \to J/\psi K^{*}(892)^0$ is presented using data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected in $pp$ collisions at a centre-of-mass energy of 7TeV with the LHCb detector. The polarisation amplitudes and the corresponding phases are measured to be \[ \begin{array}{cclllllll} |A_{\parallel}|^2 &\;=\; & 0.227 &\pm & 0.004 & \text{(stat.)} &\pm & 0.011 & \text{(syst.)}, \\ |A_{\perp}|^2 &\;=\; & 0.201 &\pm & 0.004 & \text{(stat.)} &\pm & 0.008&\text{(syst.)},\\ \delta_{\parallel}\; \text{[rad]} &\;=\; & -2.94 &\pm & 0.02 &\text{(stat.)} &\pm &0.03&\text{(syst.)},\\ \delta_{\perp}\; \text{[rad]} &\;=\; & \phantom{-}2.94 &\pm & 0.02 &\text{(stat.)} &\pm &0.02&\text{(syst.)}.\\ \end{array} \] Comparing $B^0\to J/\psi K^{*}(892){^0}$ and $\overline{B}^0\to J/\psi \overline K^{*}(892){^0}$ decays, no evidence for direct CP violation is found..
arXiv:1307.2782; CERN-PH-EP-2013-104; LHCB-PAPER-2013-023; CERN-PH-EP-2013-104; LHCB-PAPER-2013-023.- Geneva : CERN, 2013-09-03 - 12 p. - Published in : Phys. Rev. D 88 (2013) 052002 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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10.
(86)
First observation of the decay $B_{c}^{+}\to J/\psi K^+$ / LHCb collaboration
The decay $B_c^+\to J/\psi K^+$ is observed for the first time using a data sample, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb experiment in $pp$ collisions at a centre-of-mass energy of 7 TeV. A yield of 46$\pm12$ events is reported, with a significance of 5.0 standard deviations. [...]
arXiv:1306.6723; CERN-PH-EP-2013-106; LHCB-PAPER-2013-021; CERN-PH-EP-2013-106; LHCB-PAPER-2013-021.- Geneva : CERN, 2013 - 14 p. - Published in : JHEP 09 (2013) 075 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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