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CERN Document Server 2,050 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 3.86 δευτερόλεπτα. 
1.
(100)
Measurement of the polarization amplitudes in $B^0 \to J/\psi K^{*}(892)^0$ decays / LHCb collaboration
An analysis of the decay $B^0 \to J/\psi K^{*}(892)^0$ is presented using data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected in $pp$ collisions at a centre-of-mass energy of 7TeV with the LHCb detector. The polarisation amplitudes and the corresponding phases are measured to be \[ \begin{array}{cclllllll} |A_{\parallel}|^2 &\;=\; & 0.227 &\pm & 0.004 & \text{(stat.)} &\pm & 0.011 & \text{(syst.)}, \\ |A_{\perp}|^2 &\;=\; & 0.201 &\pm & 0.004 & \text{(stat.)} &\pm & 0.008&\text{(syst.)},\\ \delta_{\parallel}\; \text{[rad]} &\;=\; & -2.94 &\pm & 0.02 &\text{(stat.)} &\pm &0.03&\text{(syst.)},\\ \delta_{\perp}\; \text{[rad]} &\;=\; & \phantom{-}2.94 &\pm & 0.02 &\text{(stat.)} &\pm &0.02&\text{(syst.)}.\\ \end{array} \] Comparing $B^0\to J/\psi K^{*}(892){^0}$ and $\overline{B}^0\to J/\psi \overline K^{*}(892){^0}$ decays, no evidence for direct CP violation is found..
arXiv:1307.2782; CERN-PH-EP-2013-104; LHCB-PAPER-2013-023; CERN-PH-EP-2013-104; LHCB-PAPER-2013-023.- Geneva : CERN, 2013-09-03 - 12 p. - Published in : Phys. Rev. D 88 (2013) 052002 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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2.
(88)
Measurement of $CP$ violation and the $B_s^0$ meson decay width difference with $B_s^0 \to J/\psi K^+K^-$ and $B_s^0\to J/\psi\pi^+\pi^-$ decays / LHCb Collaboration
The time-dependent $CP$ asymmetry in $B_s^0\to J/\psi K^+K^-$ decays is measured using $pp$ collision data at $\sqrt{s}=7$TeV, corresponding to an integrated luminosity of 1.0$fb^{-1}$, collected with the LHCb detector. The decay time distribution is characterised by the decay widths $\Gamma_{\mathrm{L}}$ and $\Gamma_{\mathrm{H}}$ of the light and heavy mass eigenstates of the $B_s^0$--$\overline{B}_s^0$ system and by a $CP$ -violating phase $\phi_s$. [...]
arXiv:1304.2600; CERN-PH-EP-2013-055; LHCB-PAPER-2013-002; CERN-PH-EP-2013-055; LHCB-PAPER-2013-002.- Geneva : CERN, 2013-06-21 - 21 p. - Published in : Phys. Rev. D 87 (2013) 112010 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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(86)
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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4.
(86)
Differential branching fraction and angular analysis of the decay $B_s^0 \to \phi \mu^+\mu^-$ / LHCb Collaboration
The determination of the differential branching fraction and the first angular analysis of the decay $B_s^0\to\phi\mu^{+}\mu^{-}$ are presented using data, corresponding to an integrated luminosity of $1.0\,{\rm fb}^{-1}$, collected by the LHCb experiment at $\sqrt{s}=7\,{\rm TeV}$. The differential branching fraction is determined in bins of $q^{2}$, the invariant dimuon mass squared. [...]
arXiv:1305.2168; CERN-PH-EP-2013-078; LHCB-PAPER-2013-017; CERN-PH-EP-2013-078; LHCB-PAPER-2013-017.- Geneva : CERN, 2013-07-11 - 18 p. - Published in : JHEP 07 (2013) 084 APS published version, local copy: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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5.
(86)
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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6.
(86)
Measurement of the $B^0_s \rightarrow J/\psi \bar{K}^{*0}$ branching fraction and angular amplitudes / LHCb collaboration
A sample of 114±11 $B_s^0 → J/ψK^-π^+$ signal events obtained with 0.37  fb$^{-1}$ of pp collisions at √s=7  TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the $B_s^0 → J/ψK̅ ^{*0}$ decay, with $K̅ ^{*0} → K^-π^+$. The $K^-π^+$ mass spectrum of the candidates in the $B_s^0$ peak is dominated by the $K̅ ^{*0}$ contribution. [...]
arXiv:1208.0738; CERN-PH-EP-2012-214; LHCB-PAPER-2012-014; CERN-PH-EP-2012-214; LHCB-PAPER-2012-014.- 2012-10-08 - 16 p. - Published in : Phys. Rev. D 86 (2012) 071102 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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(86)
Study of $D_{sJ}$ decays to $D^+K^0_{\rm S}$ and $D^0K^+$ final states in $pp$ collisions / LHCb Collaboration
A study of $D^+K_S^0$ and $D^0K^+$ final states is performed in a sample of 1.0 fb$^{-1}$ of $pp$ collision data collected at a centre-of-mass energy of $\sqrt{s}=7$ TeV with the LHCb detector. We confirm the existence of the $D_{s1}^*(2700)^+$ and $D_{sJ}^*(2860)^+$ excited states and measure their masses and widths to be \begin{eqnarray} m(D_{s1}^*(2700)^+) &=& 2709.2 \pm 1.9(\mbox{stat})\pm\,\,\,4.5(\mbox{syst})~{\rm MeV}/c^2,\cr \Gamma(D_{s1}^*(2700)^+) &=& \,\,\,115.8 \pm 7.3(\mbox{stat}) \pm12.1(\mbox{syst})~{\rm MeV}/c^2,\cr m(D_{sJ}^*(2860)^+) &=& 2866.1 \pm 1.0(\mbox{stat}) \pm\,\,\,6.3(\mbox{syst})~{\rm MeV}/c^2,\cr \Gamma(D_{sJ}^*(2860)^+) &=& \,\,\,\,\,\,69.9 \pm 3.2(\mbox{stat}) \pm\,\,\,6.6(\mbox{syst})~{\rm MeV}/c^2.\cr\nonumber \end{eqnarray}
arXiv:1207.6016; CERN-PH-EP-2012-181; LHCB-PAPER-2012-016; CERN-PH-EP-2012-181; LHCB-PAPER-2012-016.- Geneva : CERN, 2012 - 12 p. - Published in : JHEP 10 (2012) 151 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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(86)
Production of $J/\psi$ and $\Upsilon$ mesons in $pp$ collisions at $\sqrt{s}$ = 8 TeV / LHCb Collaboration
The production of $J/\psi$ and $\Upsilon$ mesons in $pp$ collisions at $\sqrt{s}$ = 8 TeV is studied with the LHCb detector. The $J/\psi$ and $\Upsilon$ mesons are reconstructed in the $\mu^+ \mu^-$ decay mode and the signal yields are determined to fit to the $\mu^+ \mu^-$ invariant mass distributions. [...]
arXiv:1304.6977; CERN-PH-EP-2013-071; LHCB-PAPER-2013-016; CERN-PH-EP-2013-071; LHCB-PAPER-2013-016.- Geneva : CERN, 2013-06 - 35 p. - Published in : JHEP 06 (2013) 064 APS published version, local copy: 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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(86)
Measurement of the branching fractions of the decays $B^0_s \rightarrow \overline{D}^0 K^- \pi^+$ and $B^0 \rightarrow \overline{D}^0 K^+ \pi^-$ / LHCb Collaboration
The first observation of the decay $B^0_s \rightarrow \overline{D}^0 K^-\pi^+$ is reported. The analysis is based on a data sample, corresponding to an integrated luminosity of $1.0 {\mbox{fb}^{-1}}$ of $pp$ collisions, collected with the LHCb detector [...]
arXiv:1304.6317; LHCB-PAPER-2013-022; CERN-PH-EP-2013-070; LHCB-PAPER-2013-022; CERN-PH-EP-2013-070.- Geneva : CERN, 2013-06-20 - 10 p. - Published in : Phys. Rev. D 87 (2013) 112009 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
10.
(86)
First observation of $CP$ violation in the decays of $B^0_s$ mesons / LHCb Collaboration
Using $pp$ collision data corresponding to an integrated luminosity of $1.0 \mathrm{fb}^{-1}$ and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct $C\!P$ violation in $B^0_s \to K^-\pi^+$ decays, $A_{C\!P}(B^0_s \rightarrow K^- \pi^+)=0.27 \pm 0.04\,\mathrm{(stat)} \pm 0.01\,\mathrm{(syst)}$, with significance exceeding 5 standard deviations. This is the first observation of $C\!P$ violation in the decays of $B^0_s$ mesons. [...]
arXiv:1304.6173; CERN-PH-EP-2013-068; LHCB-PAPER-2013-018; CERN-PH-EP-2013-068; LHCB-PAPER-2013-018.- Geneva : CERN, 2013-05-30 - 9 p. - Published in : Phys. Rev. Lett. 110 (2013) 221601 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External links: Interactions.org article; Physics Synopsis
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