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CERN Document Server 86 records found  1 - 10próximoend  jump to record: Search took 1.10 seconds. 
1.
Prompt charm production in $pp$ collisions at $\sqrt{s}$ = 7 TeV / LHCb Collaboration
Charm production at the LHC in $pp$ collisions at $\sqrt{s}$ = 7 TeV is studied with the LHCb detector. The decays $D^0 \rightarrow K^- \pi^+$, $D^+ \rightarrow K^- \pi^+ \pi^+$, $D^{*+} \rightarrow D^0(K^- \pi^+) \pi^+$, $D^+_{\mathrm{s}} \rightarrow \phi(K^- K^+) \pi^+$, $\Lambda_{\mathrm{c}}^+ \rightarrow p K^- \pi^+$, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb$^{-1}$. [...]
arXiv:1302.2864; LHCB-PAPER-2012-041; CERN-PH-EP-2013-009; LHCB-PAPER-2012-041; CERN-PH-EP-2013-009.- Geneva : CERN, 2013-06-01 - 20 p. - Published in : Nucl. Phys. B 871 (2013) 1-20 Elsevier Open Access article: LHCb-1-20 - PDF; npb.871.1 - PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Rivet analyses reference
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2.
Amplitude analysis and the branching fraction measurement of $\bar{B}^0_s \to J/\psi K^+K^-$ / LHCb Collaboration
An amplitude analysis of the final state structure in the $\overline{B}_s^0 \to J/\psi K^+K^-$ decay mode is performed using $1.0~\rm fb^{-1}$ of data collected by the LHCb experiment in 7 TeV center-of-mass energy $pp$ collisions produced by the LHC. A modified Dalitz plot analysis of the final state is performed using both the invariant mass spectra and the decay angular distributions. [...]
arXiv:1302.1213; LHCB-PAPER-2012-040; CERN-PH-EP-2013-008; LHCB-PAPER-2012-040; CERN-PH-EP-2013-008.- Geneva : CERN, 2013-04-08 - 23 p. - Published in : Phys. Rev. D 87 (2013) 072004 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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3.
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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4.
Analysis of the resonant components in $\overline{B}^0 \to J/\psi \pi^+ \pi^-$ / LHCb collaboration
Interpretation of CP violation measurements using charmonium decays, in both the B0 and Bs systems, can be subject to changes due to "penguin" type diagrams. These effects can be investigated using measurements of the Cabibbo-suppressed B0->J/\psi pi+pi- decays. [...]
arXiv:1301.5347; LHCB-PAPER-2012-045; CERN-PH-EP-2013-004; LHCB-PAPER-2012-045; CERN-PH-EP-2013-004.- Geneva : CERN, 2013-03-01 - 21 p. - Published in : Phys. Rev. D 87 (2013) 052001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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5.
Measurement of the fragmentation fraction ratio $f_{s}/f_{d}$ and its dependence on $B$ meson kinematics / LHCb collaboration
The relative production rate of $B^{0}_{s}$ and $B^{0}$ mesons is determined with the hadronic decays $B^{0}_{s} \rightarrow D^{-}_{s}\pi^{+}$ and $B^0 \rightarrow D^{-}K^{+}$. The measurement uses data corresponding to 1.0 fb$^{-1}$ of $pp$ collisions at a centre-of-mass energy of $\sqrt{s}=7$ TeV recorded in the forward region with the LHCb experiment. [...]
arXiv:1301.5286; CERN-PH-EP-2013-006; LHCB-PAPER-2012-037; CERN-PH-EP-2013-006; LHCB-PAPER-2012-037.- Geneva : CERN, 2013 - 18 p. - Published in : JHEP 04 (2013) 001 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.
Measurement of $CP$ observables in $B^0\to D K^{*0}$ with $D\to K^+K^-$ / LHCb Collaboration
The decay $B^0 \to D K^{*0}$ and the charge conjugate mode are studied using 1.0${\mathrm fb}^-1$ of $pp$ collision data collected by the LHCb experiment at $\sqrt{s} = 7TeV$ in 2011. The CP asymmetry between the $B^0 \to D K^{*0}$ and the $\bar{B}^0 \to D \bar{K }^{*0}$ decay rates, with the neutral D meson in the CP-even final state $K^+K^-$, is found to be \begin{equation*} {\cal A}_d^{KK} = -0.45 \pm 0.23 \pm 0.02, \end{equation*} where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1212.5205; CERN-PH-EP-2012-362; LHCB-PAPER-2012-042; CERN-PH-EP-2012-362; LHCB-PAPER-2012-042.- Geneva : CERN, 2013 - 10 p. - Published in : JHEP 03 (2013) 067 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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7.
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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8.
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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9.
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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10.
Implications of LHCb measurements and future prospects / LHCb Collaboration
During 2011 the LHCb experiment at CERN collected $1.0 {\mbox{fb}^{-1}}$ of $\sqrt{s} = 7 {\mathrm{\,Te\kern -0.1em V}}$ $pp$ collisions. Due to the large heavy quark production cross-sections, these data provide unprecedented samples of heavy flavoured hadrons. [...]
arXiv:1208.3355; LHCb-PUB-2012-006; LHCB-PAPER-2012-031; CERN-PH-EP-2012-334; LHCb-PUB-2012-006; LHCB-PAPER-2012-031; CERN-PH-EP-2012-334.- Geneva : CERN, 2013-04-26 - 178 p. - Published in : Eur. Phys. J. C 73 (2013) 2373 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External links: PDF on ECONF; Proceedings write-up on ECONF
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