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CERN Document Server 2,050 záznamov nájdených  1 - 10ďalšíkoniec  skoč na záznam: Hľadanie trvalo 4.34 sekúnd. 
1.
(100)
Measurement of the effective $B_s^0 \to K^+ K^-$ lifetime / LHCb Collaboration
A precise determination of the effective $B_s^0 \rightarrow K^+ K^-$ lifetime can be used to constrain contributions from physics beyond the Standard Model in the $B_s^0$ meson system. Conventional approaches select $B$ meson decay products that are significantly displaced from the $B$ meson production vertex [...]
arXiv:1207.5993; LHCB-PAPER-2012-013; CERN-PH-EP-2012-172; LHCB-PAPER-2012-013; CERN-PH-EP-2012-172.- Geneva : CERN, 2012-10-02 - 8 p. - Published in : Phys. Lett. B 716 (2012) 393-400 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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2.
(91)
First observation of the decay $B_s^0 \rightarrow \phi \bar{K}^{*0}$ / LHCb collaboration
A first observation of the decay $B_s^0 \rightarrow \phi \bar{K}^{*0}$ is reported from an analysis based on a data sample, corresponding to an integrated luminosity of 1.0 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 7 TeV$, collected with the LHCb detector. A yield of $30 \pm 6$ $B_s^0 \to (KK)(K\pi)$ candidates is found in the mass windows $1012.5 < M(KK) < 1026.5 MeV/c^2$ and $746 < M(K\pi)< 1046 MeV/c^2$, corresponding to a signal significance of 6.1 standard deviations. [...]
arXiv:1306.2239; LHCB-PAPER-2013-012; CERN-PH-EP-2013-087; LHCB-PAPER-2013-012; CERN-PH-EP-2013-087.- Geneva : CERN, 2013-11-12 - 22 p. - Published in : JHEP 11 (2013) 092 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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3.
(90)
Measurement of the branching fractions of the decays $B_s^0 \rightarrow D_s^\mp K^\pm$ and $B_s^0 \rightarrow D_s^- \pi^+$ / LHCb Collaboration
The decay mode $B^{0}_{s} \to D^{\mp}_{s} K^{\pm} $ allows for one of the theoretically cleanest measurements of the CKM angle $\gamma$ through the study of time-dependent $CP$ violation. This paper reports a measurement of its branching fraction relative to the Cabibbo-favoured mode $B^{0}_{s} \to D^{-}_{s} \pi^{+}$ based on a data sample of 0.37 fb$^{-1}$ proton-proton collisions at $\sqrt{s} = 7$ TeV collected in 2011 with the LHCb detector. [...]
arXiv:1204.1237; CERN-PH-EP-2012-091; LHCB-PAPER-2011-022; CERN-PH-EP-2012-091; LHCB-PAPER-2011-022.- Geneva : CERN, 2012 - 4 p. - Published in : JHEP 06 (2012) 115 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article : PDF; External link: Preprint
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4.
(89)
Observation of the decay $B_c^+ \to B_s^0 \pi^+$ / LHCb collaboration
The result of a search for the decay $B_c^+ \to B_s^0 \pi^+$ is presented, using the $B_s^0 \to D_s^- \pi^+$ and $B_s^0 \to J/\psi \phi$ channels. The analysis is based on a data sample of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of 1 fb$^{-1}$ taken at a center-of-mass energy of 7 TeV, and 2 fb$^{-1}$ taken at 8 TeV. [...]
arXiv:1308.4544; CERN-PH-EP-2013-136; LHCB-PAPER-2013-044; CERN-PH-EP-2013-136; LHCB-PAPER-2013-044.- Geneva : CERN, 2013-11-01 - 9 p. - Published in : Phys. Rev. Lett. 111 (2013) 181801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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5.
(88)
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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6.
(84)
Study of $B_{\scriptscriptstyle (s)}^0 \to K_{\rm \scriptscriptstyle S}^0 h^{+} h^{\prime -}$ decays with first observation of $B_{\scriptscriptstyle s}^0 \to K_{\rm \scriptscriptstyle S}^0 K^{\pm} \pi^{\mp}$ and $B_{\scriptscriptstyle s}^0 \to K_{\rm \scriptscriptstyle S}^0 \pi^{+} \pi^{-}$ / LHCb collaboration
A search for charmless three-body decays of $B^0$ and $B_{\scriptscriptstyle s}^0$ mesons with a $K_{\rm \scriptscriptstyle S}^0$ meson in the final state is performed using the $pp$ collision data, corresponding to an integrated luminosity of $1.0\mathrm{\,fb}^{-1}$, collected at a centre-of-mass energy of $7\mathrm{\,Te\kern -0.1em V}$ recorded by the LHCb experiment. Branching fractions of the $B_{\scriptscriptstyle (s)}^0 \to K_{\rm \scriptscriptstyle S}^0 h^{+} h^{\prime -}$ decay modes ($h^{(\prime)} = \pi, K$), relative to the well measured $B^0 \to K_{\rm \scriptscriptstyle S}^0 \pi^{+} \pi^{-}$ decay, are obtained [...]
arXiv:1307.7648; CERN-PH-EP-2013-139; LHCB-PAPER-2013-042; CERN-PH-EP-2013-139; LHCB-PAPER-2013-042.- Geneva : CERN, 2013 - 22 p. - Published in : JHEP 10 (2013) 143 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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7.
(84)
Measurement of the $B^0_s \rightarrow J/\psi \bar{K}^{*0}$ branching fraction and angular amplitudes / LHCb collaboration
A sample of 114±11 $B_s^0 → J/ψK^-π^+$ signal events obtained with 0.37  fb$^{-1}$ of pp collisions at √s=7  TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the $B_s^0 → J/ψK̅ ^{*0}$ decay, with $K̅ ^{*0} → K^-π^+$. The $K^-π^+$ mass spectrum of the candidates in the $B_s^0$ peak is dominated by the $K̅ ^{*0}$ contribution. [...]
arXiv:1208.0738; CERN-PH-EP-2012-214; LHCB-PAPER-2012-014; CERN-PH-EP-2012-214; LHCB-PAPER-2012-014.- 2012-10-08 - 16 p. - Published in : Phys. Rev. D 86 (2012) 071102 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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8.
(84)
Search for the decay $B_s^0 \to D^{*\mp} \pi^\pm$ / LHCb Collaboration
A search for the decay $B_s^0 \to D^{*\mp} \pi^\pm$ is presented using a data sample corresponding to an integrated luminosity of $1.0 \ {\rm fb}^{-1}$ of $pp$ collisions collected by LHCb. This decay is expected to be mediated by a $W$-exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help to understand the mechanism behind related decays such as $B_s^0 \to \pi^+\pi^-$ and $B_s^0 \to D \overline{D}$. [...]
arXiv:1302.6446; CERN-PH-EP-2013-025; LHCB-PAPER-2012-056; LHCB-PAPER-2012-056; CERN-PH-EP-2013-025.- Geneva : CERN, 2013-04-23 - 14 p. - Published in : Phys. Rev. D 87 (2013) 071101 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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9.
(82)
First measurement of the $CP$-violating phase in $B_s^0 \to \phi \phi$ decays / LHCb Collaboration
A first flavor-tagged measurement of the time-dependent $CP$-violating asymmetry in $B_s^0 \to \phi\phi$ decays is presented. In this decay channel, the $CP$-violating weak phase arises due to $CP$ violation in the interference between $B_s^0$-$\overline{B}_s^0$ mixing and the $b \to s \overline{s} s $ gluonic penguin decay amplitude. [...]
arXiv:1303.7125; LHCB-PAPER-2013-007; CERN-PH-EP-2013-046; LHCB-PAPER-2013-007; CERN-PH-EP-2013-046.- Geneva : CERN, 2013-06-12 - 8 p. - Published in : Phys. Rev. Lett. 110 (2013) 241802 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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10.
(80)
Measurement of the polarization amplitudes and triple product asymmetries in the $B_s^0 \to \phi\phi$ decay / LHCb collaboration
Using 1.0 fb$^{-1}$ of pp collision data collected at a centre-of-mass energy of $\sqrt{s}$=7 TeV with the LHCb detector, measurements of the polarization amplitudes, strong phase difference and triple product asymmetries in the $B_s^0 \to \phi\phi$ decay mode are presented. The measured values are $|A_0|^2 = 0.365 \pm 0.022 (stat) \pm 0.012 (syst)$, $|A_{\perp}|^2 = 0.291 \pm 0.024 (stat) \pm 0.010 (syst)$, $cos(\delta_{\parallel}) = -0.844 \pm 0.068 (stat) \pm 0.029 (syst)$, $A_U = -0.055 \pm 0.036 (stat) \pm 0.018 (syst)$, $A_V = 0.010 \pm 0.036 (stat) \pm 0.018 (syst)$..
arXiv:1204.2813; CERN-PH-EP-2012-092; LHCB-PAPER-2012-004; CERN-PH-EP-2012-092; LHCB-PAPER-2012-004.- 2013-07-16 - 9 p. - Published in : Phys. Lett. B 713 (2012) 369-377 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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