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CERN Document Server 185 elementer funnet  1 - 10nesteslutt  gå til element: Søket tok 0.57 sekunder. 
1.
Study of the kinematic dependences of $\Lambda_b^0$ production in $pp$ collisions and a measurement of the $\Lambda_b^0 \rightarrow \Lambda_c^+ \pi^-$ branching fraction / LHCb collaboration
The kinematic dependences of the relative production rates, $f_{\Lambda_b^0}/f_d$, of $\Lambda_b^0$ baryons and $\bar{B}^0$ mesons are measured using $\Lambda_b^0 \rightarrow \Lambda_c^+ \pi^-$ and $\bar{B}^0 \rightarrow D^+ \pi^-$ decays. The measurements use proton-proton collision data, corresponding to an integrated luminosity of 1 fb$^{-1}$ at a centre-of-mass energy of 7 TeV, recorded in the forward region with the LHCb experiment. [...]
arXiv:1405.6842; CERN-PH-EP-2014-106; LHCB-PAPER-2014-004; CERN-PH-EP-2014-106; LHCB-PAPER-2014-004.- Geneva : CERN, 2014 - 19 p. - Published in : JHEP 08 (2014) 143 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; Supplementary related data file(s): ZIP; External link: Preprint
2.
Measurement of the resonant and CP components in $\overline{B}^0\rightarrow J/\psi \pi^+\pi^-$ decays / LHCb Collaboration
The resonant structure of the reaction $\overline{B}^0\rightarrow J/\psi \pi^+\pi^-$ is studied using data from 3 fb$^{-1}$ of integrated luminosity collected by the LHCb experiment, one-third at 7 Tev center-of-mass energy and the remainder at 8 Tev. The invariant mass of the $\pi^+\pi^-$ pair and three decay angular distributions are used to determine the fractions of the resonant and non-resonant components. [...]
arXiv:1404.5673; CERN-PH-EP-2014-069; LHCB-PAPER-2014-012; CERN-PH-EP-2014-069; LHCB-PAPER-2014-012.- Geneva : CERN, 2014-07-10 - 21 p. - Published in : Phys. Rev. D 90 (2014) 012003 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
3.
Evidence for the decay $X(3872)\rightarrow\psi(2S)\gamma$ / LHCb collaboration
Evidence for the decay mode $X(3872)\rightarrow\psi(2S)\gamma$ in $B^+\rightarrow X(3872)K^+$ decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton-proton collisions, corresponding to an integrated luminosity of 3fb$^{-1}$ collected with the LHCb detector, at centre-of-mass energies of 7 and 8TeV. [...]
arXiv:1404.0275; CERN-PH-EP-2014-050; LHCB-PAPER-2014-008; CERN-PH-EP-2014-050; LHCB-PAPER-2014-008.- Geneva : CERN, 2014-09 - 16 p. - Published in : Nucl. Phys. B 886 (2014) 665-680 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: arXiv:1404.0275 - PDF; S0550321314001941 - XML; Related data file(s): ZIP;
4.
Angular analysis of charged and neutral $B \to K \mu^+\mu^-$ decays / LHCb collaboration
The angular distributions of the rare decays $B^+ \to K^+\mu^+\mu^-$ and $B^0 \to K^0_{\rm\scriptscriptstyle S}\mu^+\mu^-$ are studied with data corresponding to 3$~$fb$^{-1}$ of integrated luminosity, collected in proton-proton collisions at 7 and 8$~$TeV centre-of-mass energies with the LHCb detector. The angular distribution is described by two parameters, $F_{\rm H}$ and the forward-backward asymmetry of the dimuon system $A_{\rm FB}$, which are determined in bins of the dimuon mass squared. [...]
arXiv:1403.8045; LHCB-PAPER-2014-007; CERN-PH-EP-2014-056; LHCB-PAPER-2014-007; CERN-PH-EP-2014-056.- Geneva : CERN, 2014 - 25 p. - Published in : JHEP 05 (2014) 082 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
5.
Differential branching fractions and isospin asymmetries of $B \to K^{(*)} \mu^+ \mu^-$ decays / LHCb collaboration
The isospin asymmetries of $B \to K\mu^+\mu^-$ and $B \to K^{*}\mu^+\mu^-$ decays and the partial branching fractions of the $B^0 \to K^0\mu^+\mu^-$, $B^+ \to K^+\mu^+\mu^-$ and $B^+ \to K^{*+}\mu^+\mu^-$ decays are measured as functions of the dimuon mass squared, $q^2$. The data used correspond to an integrated luminosity of 3 fb$^{-1}$ from proton-proton collisions collected with the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV in 2011 and 2012, respectively. [...]
arXiv:1403.8044; LHCB-PAPER-2014-006; CERN-PH-EP-2014-055; LHCB-PAPER-2014-006; CERN-PH-EP-2014-055.- Geneva : CERN, 2014 - 22 p. - Published in : JHEP 06 (2014) 133 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
6.
Study of beauty hadron decays into pairs of charm hadrons / LHCb collaboration
First observations of the decays $\Lambda_b^0 \to \Lambda_c^+ D_{(s)}^-$ are reported using data corresponding to an integrated luminosity of $3\,{\rm fb}^{-1}$ collected at 7 and 8 TeV center-of-mass energy in proton-proton collisions with the LHCb detector. In addition, the most precise measurement of the branching fraction ${\mathcal{B}(B_s^0 \to D^+D_s^-)}$ is made and a search is performed for the decays $B^0_{(s)} \to \Lambda_c^+ \Lambda_c^-$. [...]
arXiv:1403.3606; CERN-PH-EP-2014-033; LHCB-PAPER-2014-002; CERN-PH-EP-2014-033; LHCB-PAPER-2014-002.- Geneva : CERN, 2014-05-21 - 9 p. - Published in : Phys. Rev. Lett. 112 (2014) 202001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
7.
Measurement of polarization amplitudes and $CP$ asymmetries in $B^0 \to \phi K^*(892)^0$ / LHCb collaboration
An angular analysis of the decay $B^0 \to \phi K^*(892)^0$ is reported based on a $pp$ collision data sample, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected at a centre-of-mass energy of $\sqrt{s} = 7$ TeV with the LHCb detector. The P-wave amplitudes and phases are measured with a greater precision than by previous experiments, and confirm about equal amounts of longitudinal and transverse polarization. [...]
arXiv:1403.2888; CERN-PH-EP-2014-038; LHCB-PAPER-2014-005; CERN-PH-EP-2014-038; LHCB-PAPER-2014-005.- Geneva : CERN, 2014 - 23 p. - Published in : JHEP 05 (2014) 069 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF;
8.
Measurement of $\psi(2S)$ polarisation in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb collaboration
The polarisation of prompt $\psi(2S)$ mesons is measured by performing an angular analysis of $\psi(2S)\rightarrow \mu^{+} \mu^{-}$ decays using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb detector at a centre-of-mass energy of 7 TeV. The polarisation is measured in bins of transverse momentum $p_\mathrm{T}$ and rapidity $y$ in the kinematic region $3.5<p_\mathrm{T}<15$ GeV$/c$ and $2.0<y<4.5$, and is compared to theoretical models. [...]
arXiv:1403.1339; LHCB-PAPER-2013-067; CERN-PH-EP-2014-029; CERN-PH-EP-2014-029; LHCB-PAPER-2013-067.- Geneva : CERN, 2014-05-20 - 22 p. - Published in : Eur. Phys. J. C 74 (2014) 2872 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
9.
Observation of photon polarization in the $b \to s\gamma$ transition / LHCb collaboration
This Letter presents a study of the flavor-changing neutral current radiative $B^{\pm} \to K^{\pm}\pi^{\mp}\pi^{\pm}\gamma$ decays performed using data collected in proton-proton collisions with the LHCb detector at $7$ and $8\,$TeV center-of-mass energies. In this sample, corresponding to an integrated luminosity of $3\,\text{fb}^{-1}$, nearly $14\,000$ signal events are reconstructed and selected, containing all possible intermediate resonances with a $K^{\pm}\pi^{\mp}\pi^{\pm}$ final state in the $[1.1, 1.9]\,$GeV/$c^{2}$ mass range. [...]
arXiv:1402.6852; CERN-PH-EP-2014-026; LHCB-PAPER-2014-001; CERN-PH-EP-2014-026; LHCB-PAPER-2014-001.- Geneva : CERN, 2014-04-22 - 8 p. - Published in : Phys. Rev. Lett. 112 (2014) 161801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
10.
Measurement of resonant and $CP$ components in $\overline{B}_s^0\to J/\psi\pi^+\pi^-$ decays / LHCb Collaboration
The resonant structure of the decay $\overline{B}_s^0\to J/\psi\pi^+\pi^-$ is studied using data corresponding to 3 fb$^{-1}$ of integrated luminosity from $pp$ collisions by the LHC and collected by the LHCb detector. Five interfering $\pi^+\pi^-$ states are required to describe the decay: $f_0(980),~f_0(1500),~f_0(1790),~f_2(1270)$, and $f_2^{\prime}(1525)$. [...]
arXiv:1402.6248; LHCB-PAPER-2013-069; CERN-PH-EP-2014-024; LHCB-PAPER-2013-069; CERN-PH-EP-2014-024.- Geneva : CERN, 2014-05-14 - 21 p. - Published in : Phys. Rev. D 89 (2014) 092006 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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