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CERN Document Server Sök i 2,050 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 5.84 sekunder. 
1.
(100)
First observation of top quark production in the forward region / LHCb collaboration
Top quark production in the forward region in proton-proton collisions is observed for the first time. The $W\!+\!b$ final state with $W\to\mu\nu$ is reconstructed using muons with a transverse momentum, $p_{\rm T}$, larger than 25 GeV in the pseudorapidity range $2.0<\eta<4.5$. [...]
arXiv:1506.00903; LHCB-PAPER-2015-022; CERN-PH-EP-2015-132; LHCB-PAPER-2015-022; CERN-PH-EP-2015-132.- Geneva : CERN, 2015-09-08 - 10 p. - Published in : Phys. Rev. Lett. 115 (2015) 112001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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2.
(91)
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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3.
(91)
Precision measurement of $D$ meson mass differences / LHCb Collaboration
Using three- and four-body decays of $D$ mesons produced in semileptonic $b$-hadron decays, precision measurements of $D$ meson mass differences are made together with a measurement of the $D^{0}$ mass. The measurements are based on a dataset corresponding to an integrated luminosity of 1.0 fb$^{-1}$ collected in $pp$ collisions at 7~TeV. [...]
arXiv:1304.6865; CERN-PH-EP-2013-053; LHCB-PAPER-2013-011; CERN-PH-EP-2013-053; LHCB-PAPER-2013-011.- Geneva : CERN, 2013 - 18 p. - Published in : JHEP 06 (2013) 065 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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4.
(91)
Measurements of the branching fractions of $B^{+} \to p \bar{p} K^{+}$ decays / LHCb Collaboration
The branching fractions of the decay $B^{+} \to p \bar p K^{+}$ for different intermediate states are measured using data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb experiment. The total branching fraction, its charmless component $(M_{p\bar p} <2.85 $ $ GeV/c^{2})$ and the branching fractions via the resonant $c\bar c$ states $\eta_{c}(1S)$ and $\psi(2S)$ relative to the decay via a $J/\psi$ intermediate state are \begin{align*} \frac{{\mathcal B}(B^{+} \to p \bar p K^{+})_{total}}{{\mathcal B}(B^{+} \to J/\psi K^{+} \to p \bar p K^{+})}=& \, 4.91 \pm 0.19 \, {(\rm stat)} \pm 0.14 \, {(\rm syst)},\\ \frac{{\mathcal B}(B^{+} \to p \bar p K^{+})_{M_{p\bar p} <2.85 {GeV/}c^{2}}}{{\mathcal B}(B^{+} \to J/\psi K^{+} \to p \bar p K^{+})}=& \, 2.02 \pm 0.10 \, {(\rm stat)}\pm 0.08 \, {(\rm syst)},\\ \frac{{\mathcal B} (B^{+} \to \eta_{c}(1S) K^{+} \to p \bar p K^{+})}{{\mathcal B}(B^{+} \to J/\psi K^{+} \to p \bar p K^{+})} = & \, 0.578 \pm 0.035 \, {(\rm stat)} \pm 0.027 \, {(\rm syst)},\\ \frac{{\mathcal B} (B^{+} \to \psi(2S) K^{+} \to p \bar p K^{+})}{{\mathcal B}(B^{+} \to J/\psi K^{+} \to p \bar p K^{+})}=& \, 0.080 \pm 0.012 \, {(\rm stat)} \pm 0.009 \, {(\rm syst)}.\\ \end{align*} Upper limits on the $B^{+}$ branching fractions into the $\eta_{c}(2S)$ meson and into the charmonium-like states $X(3872)$ and $X(3915)$ are also obtained..
arXiv:1303.7133; LHCB-PAPER-2012-047; CERN-PH-EP-2013-040; LHCB-PAPER-2012-047; CERN-PH-EP-2013-040.- Geneva : CERN, 2013-06-13 - 14 p. - Published in : Eur. Phys. J. C 73 (2013) 2462 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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5.
(91)
Measurement of $J/\psi$ production in $pp$ collisions at $\sqrt{s}=2.76$ TeV / LHCb Collaboration
The production of $J/\psi$ mesons is studied with the LHCb detector using data from $pp$ collisions at $\sqrt{s}=2.76\, {\rm TeV}$ corresponding to an integrated luminosity of $71\,{\rm nb}^{-1}$. The differential cross-section for inclusive $J/\psi$ production is measured as a function of its transverse momentum $p_{\rm T}$. [...]
arXiv:1212.1045; CERN-PH-EP-2012-349; LHCB-PAPER-2012-039; CERN-PH-EP-2012-349; LHCB-PAPER-2012-039.- Geneva : CERN, 2013 - 18 p. - Published in : JHEP 02 (2013) 041 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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6.
(91)
Measurement of the charge asymmetry in $B^{\pm}\rightarrow \phi K^{\pm}$ and search for $B^{\pm}\rightarrow \phi \pi^{\pm}$ decays / LHCb collaboration
The CP-violating charge asymmetry in $B^{\pm}\rightarrow \phi K^{\pm}$ decays is measured in a sample of $pp$ collisions at 7 TeV centre-of-mass energy, corresponding to an integrated luminosity of 1.0 fb$^{-1}$ collected by the LHCb experiment. The result is $\mathcal{A}_{CP}(B^{\pm}\rightarrow \phi K^{\pm}) = \rm 0.022\pm 0.021 \pm 0.009$, where the first uncertainty is statistical and the second systematic. [...]
arXiv:1309.3742; LHCB-PAPER-2013-048; CERN-PH-EP-2013-166; LHCB-PAPER-2013-048; CERN-PH-EP-2013-166.- Geneva : CERN, 2014-01-20 - 10 p. - Published in : Phys. Lett. B 728 (2014) 85-94 APS published version, local copy: PDF; Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: arXiv:1309.3742 - PDF; S0370269313009398 - XML; Related data file(s): ZIP; Related supplementary data file(s): ZIP;
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7.
(91)
Measurements of $B_c^+$ production and mass with the $B_c^+ \to J/\psi \pi^+$ decay / LHCb Collaboration
Measurements of $B_c^+$ production and mass are performed with the decay mode $B_c^+ \to J/\psi \pi^+$ using 0.37 fb$^{-1}$ of data collected in $pp$ collisions at $\sqrt{s}=7$~TeV by the LHCb experiment. The ratio of the production cross-section times branching fraction between the $B_c^+ \to J/\psi \pi^+$ and the $B^+ \to J/\psi K^+$ decays is measured to be $(0.68 \pm 0.10\,({\rm stat.}) \pm 0.03\,({\rm syst.}) \pm 0.05\,({\rm lifetime}) )\%$ for $B_c^+$ and $B^+$ mesons with transverse momenta $p_{\rm T}>4~$GeV/$c$ and pseudorapidities $2.5<\eta<4.5$. [...]
arXiv:1209.5634; LHCB-PAPER-2012-028; CERN-PH-EP-2012-275; LHCB-PAPER-2012-028; CERN-PH-EP-2012-275.- Geneva : CERN, 2012 - 15 p. - Published in : Phys. Rev. Lett. 109 (2012) 232001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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8.
(90)
First evidence for the annihilation decay mode $B^{+} \to D_{s}^{+} \phi$ / LHCb Collaboration
Evidence for the hadronic annihilation decay mode $B^{+} \to D_s^{+}\phi$ is found with greater than $3\sigma$ significance. The branching fraction and \CP asymmetry are measured to be \begin{eqnarray} \mathcal{B}(B^{+} \to D_s^{+}\phi) &=& \left(1.87^{\,+1.25}_{\,-0.73}\,({\rm stat}) \pm 0.19\, ({\rm syst}) \pm 0.32\, ({\rm norm})\right) \times 10^{-6}, \nonumber\\ \mathcal{A}_{CP}(B^{+} \to D_s^{+}\phi) &=& -0.01 \pm 0.41\, ({\rm stat}) \pm 0.03\, ({\rm syst}). [...]
arXiv:1210.1089; CERN-PH-EP-2012-286; LHCB-PAPER-2012-025; CERN-PH-EP-2012-286; LHCB-PAPER-2012-025.- Geneva : CERN, 2013 - 19 p. - Published in : JHEP 02 (2013) 043 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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9.
(90)
Measurement of the cross-section for $Z\to e^+e^-$ production in $pp$ collisions at $\sqrt{s} =7$ TeV / LHCb Collaboration
A measurement of the cross-section for pp$ \rightarrow$Z$ \rightarrow$e$^+$e$^-$ is presented using data at $\sqrt{s}=7$ TeV corresponding to an integrated luminosity of 0.94 fb$^{-1}$. The process is measured within the kinematic acceptance $p_{\mathrm{T}}>20$GeV/$c$ and $2<\eta<4.5$ for the daughter electrons and dielectron invariant mass in the range 60-120 GeV/$c^2$. [...]
arXiv:1212.4620; CERN-PH-EP-2012-363; LHCB-PAPER-2012-036; CERN-PH-EP-2012-363; LHCB-PAPER-2012-036.- Geneva : CERN, 2013 - 22 p. - Published in : JHEP 02 (2013) 106 APS published version, local copy: PDF; Fulltext: arXiv:1212.4620 - PDF; LHCb-PAPER-2012-036 - PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Rivet analyses reference
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10.
(90)
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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