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CERN Document Server 31 record trovati  1 - 10successivofine  salta al record: La ricerca ha impiegato 0.75 secondi. 
1.
Search for the $X(4140)$ state in $B^+\to J/\psi\phi K^+$ decays / LHCb Collaboration
A search for the X(4140) state in B+ to J/psi phi K+ decays is performed with 0.37 fb-1 of pp collisions at sqrt(s)=7 TeV collected by the LHCb experiment. No evidence for this state is found, in 2.4 sigma disagreement with a measurement by CDF. [...]
arXiv:1202.5087; CERN-PH-EP-2012-004; LHCB-PAPER-2011-033; CERN-PH-EP-2012-004; LHCB-PAPER-2011-033.- Geneva : CERN, 2012 - 15 p. - Published in : Phys. Rev. D 85 (2012) 091103 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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2.
Measurement of the cross-section ratio $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ for prompt $\chi_c$ production at $\sqrt{s}=7$ TeV / LHCb Collaboration
The prompt production of the charmonium $\chi_{c1}$ and $\chi_{c2}$ mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of $\sqrt{s}=7$ TeV. The $\chi_c$ mesons are identified through their decays $\chi_c\to J/\psi\,\gamma$ with $J/\psi \to \mu^+ \mu^-$ using 36 $\mathrm{pb^{-1}}$ of data collected by the LHCb detector in 2010. [...]
arXiv:1202.1080; LHCB-PAPER-2011-019; CERN-PH-EP-2011-227; LHCB-PAPER-2011-019; CERN-PH-EP-2011-227.- Geneva : CERN, 2013-07-16 - 9 p. - Published in : Phys. Lett. B 714 (2012) 215-223 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: DURHAM
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3.
First observation of the decays $\overline{B}^0 \to D^+ K^- \pi^+ \pi^-$ and $B^- \to D^0 K^- \pi^+ \pi^-$ / LHCb Collaboration
First observations of the Cabibbo suppressed decays $\bar{B}^0\to D^+K^-\pi^+\pi^-$ and $B^-\to D^0K^-\pi^+\pi^-$ are reported using 35~pb$^{-1}$ of data collected with the LHCb detector. Their branching fractions are measured with respect to the corresponding Cabibbo favored decays, from which we obtain ${\cal{B}}(\bar{B}^0\to D^+K^-\pi^+\pi^-)/{\cal{B}}(\bar{B}^0\to D^+\pi^-\pi^+\pi^-)=(5.9\pm1.1\pm0.5)\times10^{-2}$ and ${\cal{B}}(B^-\to D^0K^-\pi^+\pi^-)/{\cal{B}}(B^-\to D^0\pi^-\pi^+\pi^-)=(9.4\pm1.3\pm0.9)\times10^{-2}$, where the uncertainties are statistical and systematic, respectively. [...]
arXiv:1201.4402; LHCB-PAPER-2011-040; CERN-EP-PH-2011-229; CERN-PH-EP-2011-229; LHCB-PAPER-2011-040; CERN-PH-EP-2011-229.- Geneva : CERN, 2012 - 9 p. - Published in : Phys. Rev. Lett. 108 (2012) 161801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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4.
Observation of X(3872) production in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb Collaboration
Using 34.7 pb-1 of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at sqrt(s) = 7 TeV is observed for the first time. Candidates are selected in the X(3872) -> J/psi pi+ pi- decay mode, and used to measure sigma(pp -> X(3872) + anything) B(X(3872)-> J/psi pi+ pi-) = 4.7 +- 1.1 (stat) +- 0.7 (syst), where sigma(pp -> X(3872) + anything) is the inclusive production cross-section of X(3872) mesons with rapidity in the range 2.5-4.5 and transverse momentum in the range 5-20 GeV/c [...]
arXiv:1112.5310; LHCB-PAPER-2011-034; CERN-PH-EP-2011-216; LHCB-PAPER-2011-034; CERN-PH-EP-2011-216.- Geneva : CERN, 2012-05-04 - 11 p. - Published in : Eur. Phys. J. C 72 (2012) 1972 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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5.
Measurement of $b$-hadron masses / LHCb Collaboration
Measurements of $b$-hadron masses are performed with the exclusive decay modes $B^+\to J/\psi K^+$, $B^0 \to J/\psi K^{*0}$, $B^0 \to J/\psi K^0_{\rm S}$, $B_s^0 \to J/\psi\phi$ and $\Lambda^0_b\to J/\psi\Lambda$ using an integrated luminosity of 35 pb$^{-1}$ collected in $pp$ collisions at a centre-of-mass energy of 7 TeV by the LHCb experiment. The momentum scale is calibrated with $J/\psi \to \mu^+\mu^-$ decays and verified to be known to a relative precision of $2 \times 10^{-4}$ using other two-body decays. [...]
arXiv:1112.4896; LHCB-PAPER-2011-035; CERN-PH-EP-2011-226; LHCB-PAPER-2011-035; CERN-PH-EP-2011-226.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 708 (2012) 241-248 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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6.
Observation of $\overline{B}^0_s \to J/\psi f'_2(1525)$ in $J/\psi K^+K^-$ final states / LHCb Collaboration
In this Letter the decay $\overline{B}^0_s \to J/\psi K^+ K^-$ is investigated. Although the $J/\psi \phi$ channel is well known, final states at higher $K^+K^-$ masses have not previously been studied. [...]
arXiv:1112.4695; CERN-PH-EP-2011-212; LHCB-PAPER-2011-026; CERN-PH-EP-2011-212; LHCB-PAPER-2011-026.- Geneva : CERN, 2012 - 8 p. - Published in : Phys. Rev. Lett. 108 (2012) 151801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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7.
Measurement of mixing and CP violation parameters in two-body charm decays / LHCb Collaboration
A study of mixing and indirect CP violation in D0 mesons through the determination of the parameters y_CP and A_\Gamma\ is presented. The parameter y_CP is the deviation from unity of the ratio of effective lifetimes measured in D0 decays to the CP eigenstate K+K- with respect to decays to the Cabibbo favoured mode K-\pi+. [...]
arXiv:1112.4698; LHCB-PAPER-2011-032; CERN-PH-EP-2011-206; LHCB-PAPER-2011-032; CERN-PH-EP-2011-206.- Geneva : CERN, 2012 - 20 p. - Published in : JHEP 04 (2012) 129 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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8.
Measurement of the $B^0_s-\overline{B}^0_s$ oscillation frequency $\Delta m_s$ in $B^0_s \to D^-_s (3)\pi$ decays / LHCb Collaboration
The $B^0_s$-$\overline{B}^0_s$ oscillation frequency $\Delta m_s$ is measured with 36 pb$^{-1}$ of data collected in $pp$ collisions at $\sqrt{s}$ = 7 TeV by the LHCb experiment at the Large Hadron Collider. A total of 1381 $B^0_s \rightarrow D_s^- \pi^+$ and $B^0_s \rightarrow D_s^- \pi^+\pi^-\pi^+$ signal decays are reconstructed, with average decay time resolutions of 44~fs and 36~fs, respectively. [...]
arXiv:1112.4311; LHCB-PAPER-2011-010; CERN-PH-EP-2011-194; LHCB-PAPER-2011-010; CERN-PH-EP-2011-194.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 709 (2012) 177-184 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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9.
Measurement of charged particle multiplicities in $pp$ collisions at $\sqrt{s}$ = 7 TeV in the forward region / LHCb Collaboration
The charged particle production in proton-proton collisions is studied with the LHCb detector at a centre-of-mass energy of ${\sqrt{s} =7}$TeV in different intervals of pseudorapidity $\eta$. The charged particles are reconstructed close to the interaction region in the vertex detector, which provides high reconstruction efficiency in the $\eta$ ranges $-2.5<\eta<-2.0$ and $2.0<\eta<4.5$. [...]
arXiv:1112.4592; LHCB-PAPER-2011-011; CERN-PH-EP-2011-209; LHCB-PAPER-2011-011; CERN-PH-EP-2011-209.- Geneva : CERN, 2012-04-20 - 23 p. - Published in : Eur. Phys. J. C 72 (2012) 1947 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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10.
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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CERN Document Server : 31 record trovati   1 - 10successivofine  salta al record:
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39 Esteve, L
39 Estève, L
29 Estève, L.
39 Estéve, L
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