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CERN Document Server Encontrados 34 registros  1 - 10siguientefinal  ir al registro: La búsqueda tardó 0.54 segundos. 
1.
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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2.
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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3.
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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4.
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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5.
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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6.
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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7.
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
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8.
Observation of the resonant character of the $Z(4430)^-$ state / LHCb collaboration
Resonant structures in $B^0\to\psi'\pi^-K^+$ decays are analyzed by performing a four-dimensional fit of the decay amplitude, using $pp$ collision data corresponding to $\rm 3 fb^{-1}$ collected with the LHCb detector. The data cannot be described with $K^+\pi^-$ resonances alone, which is confirmed with a model-independent approach. [...]
arXiv:1404.1903; LHCB-PAPER-2014-014; CERN-PH-EP-2014-061; LHCB-PAPER-2014-014; CERN-PH-EP-2014-061.- Geneva : CERN, 2014-06-04 - 9 p. - Published in : Phys. Rev. Lett. 112 (2014) 222002 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External links: Interactions.org article; Symmetry Magazine article
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9.
Evidence for the decay $B_c^+ \rightarrow J/\psi 3\pi^+ 2\pi^-$ / LHCb collaboration
Evidence is presented for the decay $B_c+\rightarrow J/\psi 3\pi^+2\pi^-$ using proton-proton collision data, corresponding to an integrated luminosity of 3fb$^{-1}$, collected with the LHCb detector. A signal yield of $32\pm8$ decays is found with a significance of 4.5 standard deviations. [...]
arXiv:1404.0287; CERN-PH-EP-2014-054; LHCB-PAPER-2014-009; CERN-PH-EP-2014-054; LHCB-PAPER-2014-009.- Geneva : CERN, 2014 - 17 p. - Published in : JHEP 05 (2014) 148 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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10.
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;
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CERN Document Server : Encontrados 34 registros   1 - 10siguientefinal  ir al registro:
Vea también: autores con nombres similares
277 Powell, A
1 Powell, A J
1 Powell, A L
2 Powell, A M
1 Powell, A S
53 Powell, A.
1 Powell, Aaron W
1 Powell, Alex W
1 Powell, Alexander M
1 Powell, Alvin
1 Powell, Amanda
1 Powell, Andrea
6 Powell, Andrew J
2 Powell, Andrew S
1 Powell, Andrew Stephen
1 Powell, Annie
7 Powell, Anthony
4 Powell, Arthur B
1 Powell, Asher
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