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Model-independent confirmation of the $Z(4430)^-$ state / LHCb collaboration
The decay $B^0\to \psi(2S) K^+\pi^-$ is analyzed using $\rm 3~fb^{-1}$ of $pp$ collision data collected with the LHCb detector. A model-independent description of the $\psi(2S) \pi$ mass spectrum is obtained, using as input the $K\pi$ mass spectrum and angular distribution derived directly from data, without requiring a theoretical description of resonance shapes or their interference. [...]
arXiv:1510.01951; CERN-PH-EP-2015-244; LHCB-PAPER-2015-038; CERN-PH-EP-2015-244; LHCB-PAPER-2015-038.- 2015-12-29 - 15 p. - Published in : Phys. Rev. D 92 (2015) 112009 APS Open Access article: PDF; Fulltext: 10.1103_PhysRevD.92.112009 - PDF; arXiv:1510.01951 - PDF; External link: Figures, tables and other information

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Measurement of $CP$ violation and constraints on the CKM angle $\gamma$ in $B^{\pm}\rightarrow D K^{\pm}$ with $D \rightarrow K_S^0 \pi^+ \pi^-$ decays / LHCb collaboration
A model-dependent amplitude analysis of $B^{\pm} \rightarrow D K^{\pm}$ with $D \rightarrow K_S^0 \pi^+ \pi^-$ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of $1$ fb$^{-1}$, recorded by LHCb at a centre-of-mass energy of $7$ TeV in $2011$. Values of the $CP$ violation observables $x_{\pm}$ and $y_{\pm}$, which are sensitive to the CKM angle $\gamma$, are measured to be \begin{align*} x_- &= +0.027 \pm 0.044 ^{+0.010}_{-0.008} \pm 0.001, \\ y_- &= +0.013 \pm 0.048 ^{+0.009}_{-0.007} \pm 0.003, \\ x_+ &= -0.084 \pm 0.045 \pm 0.009 \pm 0.005, \\ y_+ &= -0.032 \pm 0.048 ^{+0.010}_{-0.009} \pm 0.008, \end{align*} where the first uncertainty is statistical, the second systematic and the third arises from the uncertainty of the $D \rightarrow K_S^0 \pi^+ \pi^-$ amplitude model. [...]
arXiv:1407.6211; LHCB-PAPER-2014-017; CERN-PH-EP-2014-166; LHCB-PAPER-2014-017; CERN-PH-EP-2014-166.- Geneva : CERN, 2014-11 - 25 p. - Published in : Nucl. Phys. B 888 (2014) 169-193 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: S0550321314002934 - XML; arXiv:1407.6211 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP;

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First measurement of the charge asymmetry in beauty-quark pair production / LHCb collaboration
The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in $b\bar{b}$ pair production at a hadron collider. The data used correspond to an integrated luminosity of 1.0fb$^{-1}$ collected at 7TeV center-of-mass energy in proton-proton collisions with the LHCb detector. [...]
arXiv:1406.4789; CERN-PH-EP-2014-130; LHCB-PAPER-2014-023; CERN-PH-EP-2014-130; LHCB-PAPER-2014-023.- Geneva : CERN, 2014-08-20 - 9 p. - Published in : Phys. Rev. Lett. 113 (2014) 082003 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Observation of the $\Lambda_b^0 \rightarrow J/\psi p \pi^-$ decay / LHCb collaboration
The first observation of the Cabibbo-suppressed decay $\Lambda_b^0\rightarrow J/\psi p \pi^-$ is reported using a data sample of proton-proton collisions at 7 and 8 TeV, corresponding to an integrated luminosity of 3 $\rm fb^{-1}$. A prominent signal is observed and the branching fraction relative to the decay mode $\Lambda_b^0\rightarrow J/\psi p K^-$ is determined to be $$ \frac{{\cal B}(\Lambda_b^0\rightarrow J/\psi p \pi^-)}{{\cal B}(\Lambda_b^0\rightarrow J/\psi p K^-)}=0.0824\pm0.0025\:(\text{stat})\pm0.0042\:(\text{syst}). [...]
arXiv:1406.0755; LHCB-PAPER-2014-020; CERN-PH-EP-2014-115; LHCB-PAPER-2014-020; CERN-PH-EP-2014-115.- Geneva : CERN, 2014 - 19 p. - Published in : JHEP 07 (2014) 103 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF;

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Precision measurement of the mass and lifetime of the $\Xi_b^0$ baryon / LHCb collaboration
Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 $\Xi_b^0\to\Xi_c^+\pi^-$, $\Xi_c^+\to pK^-\pi^+$ signal decays are reconstructed. From this sample, the first measurement of the $\Xi_b^0$ baryon lifetime is made, relative to that of the $\Lambda_b^0$ baryon. [...]
arXiv:1405.7223; CERN-PH-EP-2014-107; LHCB-PAPER-2014-021; LHCB-PAPER-2014-021; CERN-PH-EP-2014-107.- Geneva : CERN, 2014-07-15 - 10 p. - Published in : Phys. Rev. Lett. 113 (2014) 032001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP.ZIP; External link: Preprint

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Study of $\Upsilon$ production and cold nuclear matter effects in pPb collisions at $\sqrt{s_{NN}}=5~\mathrm{TeV}$ / LHCb collaboration
Production of $\Upsilon$ mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy $\sqrt{s_{NN}}=5 \mathrm{TeV}$ is studied with the LHCb detector. The analysis is based on a data sample corresponding to an integrated luminosity of $1.6 \mathrm{nb}^{-1}$. [...]
arXiv:1405.5152; LHCB-PAPER-2014-015; CERN-PH-EP-2014-102; LHCB-PAPER-2014-015; CERN-PH-EP-2014-102.- Geneva : CERN, 2014-07-21 - 19 p. - Published in : JHEP 07 (2014) 094 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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Measurement of the CP-violating phase $\phi_s$ in $\overline{B}^0_s\rightarrow J/\psi \pi^+\pi^-$ decays / LHCb collaboration
The mixing-induced CP-violating phase $\phi_s$ in ${B}^0_s$ and $\overline{B}^0_s$ decays is measured using the $J/\psi \pi^+\pi^-$ final state in data, taken from 3 fb$^{-1}$ of integrated luminosity, collected with the LHCb detector in 7 and 8 TeV centre-of-mass $pp$ collisions at the LHC. A time-dependent flavour-tagged amplitude analysis, allowing for direct CP violation, yields a value for the phase $\phi_s=70\pm 68\pm 8$ mrad. [...]
arXiv:1405.4140; CERN-PH-EP-2014-086; LHCB-PAPER-2014-019; CERN-PH-EP-2014-086; LHCB-PAPER-2014-019.- Geneva : CERN, 2014-09-07 - 10 p. - Published in : Phys. Lett. B 736 (2014) 186 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: S0370269314004845 - XML; arXiv:1405.4140 - PDF; Related data file(s): ZIP; Supplementary data file(s): PDF; External link: Preprint

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Observation of the $B^{0}_{s}\rightarrow J/\psi K_{{\rm S}}^{0} K^{\pm} \pi^{\mp}$ decay / LHCb collaboration
Decays of the form $B^{0}_{(s)}\rightarrow J/\psi K_{{\rm S}}^{0} h^+ h^{\left(\prime\right) -}$ ($h^{(\prime)} = K, \pi$) are searched for in proton-proton collision data corresponding to an integrated luminosity of $1.0 \, {\rm fb}^{-1}$ recorded with the LHCb detector. The first observation of the $B^{0}_{s}\rightarrow J/\psi K_{{\rm S}}^{0} K^{\pm} \pi^{\mp}$ decay is reported, with significance in excess of 10 standard deviations. [...]
arXiv:1405.3219; LHCB-PAPER-2014-016; CERN-PH-EP-2014-085; LHCB-PAPER-2014-016; CERN-PH-EP-2014-085.- Geneva : CERN, 2014 - 29 p. - Published in : JHEP 07 (2014) 140 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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Measurement of $CP$ asymmetry in $D^0 \rightarrow K^- K^+$ and $D^0 \rightarrow \pi^- \pi^+$ decays / LHCb collaboration
Time-integrated $CP$ asymmetries in $D^0$ decays to the final states $K^- K^+$ and $\pi^- \pi^+$ are measured using proton-proton collisions corresponding to $3\mathrm{\,fb}^{-1}$ of integrated luminosity collected at centre-of-mass energies of $7\mathrm{\,Te\kern -0.1em V}$ and $8\mathrm{\,Te\kern -0.1em V}$. The $D^0$ mesons are produced in semileptonic $b$-hadron decays, where the charge of the accompanying muon is used to determine the initial flavour of the charm meson. [...]
arXiv:1405.2797; CERN-PH-EP-2014-082; LHCB-PAPER-2014-013; CERN-PH-EP-2014-082; LHCB-PAPER-2014-013.- Geneva : CERN, 2014 - 25 p. - Published in : JHEP 07 (2014) 014 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

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10.

Measurement of the $\Xi_b^-$ and $\Omega_b^-$ baryon lifetimes / LHCb collaboration
Using a data sample of pp collisions corresponding to an integrated luminosity of $3~ \rm fb^{-1}$, the $\Xi_b^-$ and $\Omega_b^-$ baryons are reconstructed in the $\Xi_b^- \rightarrow J/\psi \Xi^-$ and $\Omega_b^- \rightarrow J/\psi \Omega^-$ decay modes and their lifetimes measured to be $\tau (\Xi_b^-) = 1.55\, ^{+0.10}_{-0.09}~{\rm(stat)} \pm 0.03\,{\rm(syst)}$ ps, $\tau (\Omega_b^-) = 1.54\, ^{+0.26}_{-0.21}~{\rm(stat)} \pm 0.05\,{\rm(syst)}$ ps. These are the most precise determinations to date. [...]
arXiv:1405.1543; CERN-PH-EP-2014-081; LHCB-PAPER-2014-010; CERN-PH-EP-2014-081; LHCB-PAPER-2014-010.- Geneva : CERN, 2014-09-07 - 9 p. - Published in : Phys. Lett. B 736 (2014) 154-162 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: arXiv:1405.1543 - PDF; S0370269314004699 - XML; Related data file(s): ZIP; External link: Preprint

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Voir aussi: noms d'auteurs similaires
228	LANCIOTTI, E
228	Lanciotti, E
50	Lanciotti, E.

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