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CERN Document Server Pronađeno je 2,049 zapisa  1 - 10slijedećikraj  idi na zapis: Pretraživanje je potrajalo 5.21 sekundi 
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Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $\sqrt{s}$ = 7 TeV / LHCb collaboration
A measurement of the production cross-section for $Z$ bosons that decay to muons is presented. The data were recorded by the LHCb detector during $pp$ collisions at a centre-of-mass energy of 7 TeV, and correspond to an integrated luminosity of 1.0 fb$^{-1}$ [...]
arXiv:1505.07024; LHCB-PAPER-2015-001; CERN-PH-EP-2015-102; LHCB-PAPER-2015-001; CERN-PH-EP-2015-102.- Geneva : CERN, 2015-08-10 - 41 p. - Published in : JHEP 08 (2015) 039 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: Preprint
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2.
(91)
Exclusive J/$\psi$ and $\psi$(2S) production in $pp$ collisions at $\sqrt{s} = 7$ TeV / LHCb Collaboration
Exclusive $J/\psi$ and $\psi(2S)$ vector meson production has been observed in the dimuon channel using the LHCb detector. The cross-section times branching fractions to two muons with pseudorapidities between 2.0 and 4.5 are measured to be \begin{equation*} \sigma_{pp\rightarrow J/\psi (\rightarrow \mu^{+} \mu^{-})} (2.0 <\eta_{\mu^{\pm}}< 4.5) = 307 \pm 21 \pm 36~\text{pb}, \end{equation*} \begin{equation*} \sigma_{pp\rightarrow \psi(2S) (\rightarrow \mu^{+} \mu^{-})} (2.0 <\eta_{\mu^{\pm}}< 4.5) = 7.8 \pm 1.3 \pm 1.0~\text{pb}, \end{equation*} where the first uncertainties are statistical and the second are systematic. [...]
arXiv:1301.7084; CERN-PH-EP-2013-005; LHCB-PAPER-2012-044; CERN-PH-EP-2013-005; LHCB-PAPER-2012-044.- Geneva : CERN, 2013 - 17 p. - Published in : J. Phys. G 40 (2013) 045001 IOP Open Access article: PDF; Related data file(s): ZIP; External link: Preprint
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3.
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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.
(90)
Measurement of relative branching fractions of B decays to $\psi(2S)$ and $J/\psi$ mesons / LHCb collaboration
The relative rates of B-meson decays into $J/\psi$ and $\psi(2S)$ mesons are measured for the three decay modes in pp collisions recorded with the LHCb detector. The ratios of branching fractions ($\mathcal{B}$) are measured to be \begin{equation*} \begin{array}{lll} \frac{\mathcal{B}( B^+ \to \psi(2S) K^+)}{\mathcal{B}( B^+ \to J/\psi K^+ )} &=& 0.594 \pm 0.006 (stat) \pm 0.016 (syst) \pm 0.015\,(R_{\psi}), \\ \frac{\mathcal{B}( B^0 \to \psi(2S) K^{*0})}{\mathcal{B}( B^0 \to J/\psi K^{*0})} &=& 0.476 \pm 0.014 (stat) \pm 0.010 (syst) \pm 0.012\,(R_{\psi}), \\ \frac{\mathcal{B}^{0}_{s}( B^0_s \to \psi(2S)\phi)}{\mathcal{B}( B^0_s \to J/\psi\phi)} &=& 0.489 \pm 0.026 (stat) \pm 0.021 (syst) \pm 0.012\,(R_{\psi}), \end{array} \end{equation*} where the third uncertainty is from the ratio of the $\psi(2S)$ and $J/\psi$ branching fractions to $\mu\mu$..
arXiv:1205.0918; CERN-PH-EP-2012-113; LHCB-PAPER-2012-010; CERN-PH-EP-2012-113; LHCB-PAPER-2012-010.- 2012-08-29 - 14 p. - Published in : Eur. Phys. J. C 72 (2012) 2118 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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5.
(89)
Observation of the decay $B_c^+ \to \psi(2S)\pi^+$ / LHCb Collaboration
The decay $B_c^+ \to \psi(2S)\pi^+$ with $\psi(2S) \to \mu^+\mu^-$ is observed with a significance of $5.2\,\sigma$ using $pp$ collision data corresponding to an integrated luminosity of 1.0 $fb^{-1}$ collected by the LHCb experiment. The branching fraction of $B_c^+ \to \psi(2S)\pi^+$ decays relative to that of the $B_c^+ \to J/\psi\pi^+$ mode is measured to be \begin{equation*} \frac{\mathcal{B}(B_c^+ \to \psi(2S)\pi^+)}{\mathcal{B}(B_c^+ \to J/\psi\pi^+)} = 0.250 \pm 0.068 \,\text{stat} \pm 0.014 \,\text{\syst} \pm 0.006 \,(\mathcal{B}). [...]
arXiv:1303.1737; CERN-PH-EP-2013-028; LHCB-PAPER-2012-054; LHCB-PAPER-2012-054; CERN-PH-EP-2013-028.- Geneva : CERN, 2013-04-26 - 12 p. - Published in : Phys. Rev. D 87 (2013) 071103 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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6.
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Measurement of the $B^0$--$\bar B^0$ oscillation frequency $\Delta m_d$ with the decays $B^0 \to D^- \pi^+$ and $B^0 \to J\ \psi K^{*0}$ / LHCb Collaboration
The $B^0$--$\bar B^0$ oscillation frequency $\Delta m_d$ is measured by the LHCb experiment using a dataset corresponding to an integrated luminosity of $1.0\,$fb$^{-1}$ of proton-proton collisions at $\sqrt{s} = 7\,$TeV, and is found to be $\Delta m_d = 0.5156 \pm 0.0051\,($stat.$) \pm 0.0033\,($syst.$)\,$ps$^{-1}$. The measurement is based on results from analyses of the decays $B^0 \to D^- \pi^+$ ($D^- \to K^+ \pi^- \pi^-$) and $B^0 \to J\ \psi K^{*0}$ ($J\ \psi \to \mu^+ \mu^-$, $K^{*0} \to K^+ \pi^-$) and their charge conjugated modes..
arXiv:1210.6750; LHCB-PAPER-2012-032; CERN-PH-EP-2012-315; LHCB-PAPER-2012-032; CERN-PH-EP-2012-315.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 719 (2013) 318-325 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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Measurement of the $C\!P$ asymmetry in $B^0 \to K^{*0} \mu^+ \mu^-$ decays / LHCb Collaboration
A measurement of the $C\!P$ asymmetry in $B^0 \rightarrow K^{*0} \mu^+ \mu^-$ decays is presented, based on 1.0$\mbox{\,fb}^{-1}$ of $pp$ collision data recorded by the LHCb experiment during 2011. The measurement is performed in six bins of invariant mass squared of the $\mu^+\mu^-$ pair, excluding the $\mathrm{J}\mskip -3mu/\mskip -2mu\psi\mskip 2mu$ and $\psi(2S)$ resonance regions. [...]
arXiv:1210.4492; LHCB-PAPER-2012-021; CERN-PH-EP-2012-302; LHCB-PAPER-2012-021; CERN-PH-EP-2012-302.- Geneva : CERN, 2013-01-17 - 8 p. - Published in : Phys. Rev. Lett. 110 (2013) 031801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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Differential branching fraction and angular analysis of the $B^+ \to K^+ \mu^+ \mu^-$ decay / LHCb Collaboration
The angular distribution and differential branching fraction of the decay $B^+ \to K^+ \mu^+\mu^-$ are studied with a dataset corresponding to 1.0 fb$^{-1}$ of integrated luminosity, collected by the LHCb experiment. The angular distribution is measured in bins of dimuon invariant mass squared and found to be consistent with Standard Model expectations. [...]
arXiv:1209.4284; LHCB-PAPER-2012-024; CERN-PH-EP-2012-263; LHCB-PAPER-2012-024; CERN-PH-EP-2012-263.- Geneva : CERN, 2013 - 17 p. - Published in : JHEP 02 (2013) 105 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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Search for direct $CP$ violation in $D^0 \rightarrow h^- h^+$ modes using semileptonic $B$ decays / LHCb Collaboration
A search for direct $CP$ violation in $D^0\rightarrow h^-h^+$ (where $h=K$ or $\pi$) is presented using data corresponding to an integrated luminosity of 1.0 fb$^{-1}$ collected in 2011 by LHCb in $pp$ collisions at a centre-of-mass energy of 7 TeV. The analysis uses $D^0$ mesons produced in inclusive semileptonic $b$-hadron decays to the $D^0\mu X$ final state, where the charge of the accompanying muon is used to tag the flavour of the $D^0$ meson. [...]
arXiv:1303.2614; CERN-PH-EP-2013-039; LHCB-PAPER-2013-003; LHCB-PAPER-2013-003; CERN-PH-EP-2013-039.- Geneva : CERN, 2013-06-10 - 15 p. - Published in : Phys. Lett. B 723 (2013) 33-43 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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10.
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Differential branching fraction and angular analysis of the decay $B^{0} \rightarrow K^{*0} \mu^+ \mu^-$ / LHCb Collaboration
The angular distributions and the partial branching fraction of the decay $B^{0} \rightarrow K^{*0} \mu^+ \mu^-$ are studied using an integrated luminosity of $0.37\,fb^{-1}$ of data collected with the LHCb detector. The forward-backward asymmetry of the muons, $A_{\mathrm{FB}}$, the fraction of longitudinal polarisation, $F_{\mathrm{L}}$, and the partial branching fraction, $\mathrm{d}{\mathcal B}/\mathrm{d}q^{2}$, are determined as a function of the dimuon invariant mass. [...]
arXiv:1112.3515; LHCB-PAPER-2011-020; CERN-PH-EP-2011-211; LHCB-PAPER-2011-020; CERN-PH-EP-2011-211.- Geneva : CERN, 2012 - 11 p. - Published in : Phys. Rev. Lett. 108 (2012) 181806 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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