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CERN Document Server 232 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 0.54 δευτερόλεπτα. 
1.
Measurement of the electron structure function F$\frac{e}{2}$ at LEP energies / Abdallah, J (Paris U., VI-VII) ; Abreu, P (LIP, Lisbon) ; Adam, W (Vienna, OAW) ; Adzic, P (Democritos Nucl. Res. Ctr.) ; Albrecht, T (Karlsruhe U., EKP) ; Alemany-Fernandez, R (CERN) ; Allmendinger, T (Karlsruhe U., EKP) ; Allport, P P (Liverpool U.) ; Amaldi, U (INFN, Milan Bicocca ; Milan Bicocca U.) ; Amapane, N (INFN, Turin ; Turin U.) et al. /DELPHI
The hadronic part of the electron structure function F2e has been measured for the first time, using e+e− data collected by the DELPHI experiment at LEP, at centre-of-mass energies of s=91.2–209.5 GeV . The data analysis is simpler than that of the measurement of the photon structure function. [...]
2014 - 9 p. - Published in : Phys. Lett. B 737 (2014) 39-47 Elsevier Open Access article: PDF;
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2.
Measurement of $J/\psi$ polarization in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb collaboration
An angular analysis of the decay $J/\psi \rightarrow \mu^{+} \mu^{-}$ is performed to measure the polarization of prompt $J/\psi$ mesons produced in $pp$ collisions at $\sqrt{s}=7 \mathrm{TeV}$. The dataset corresponds to an integrated luminosity of 0.37 fb$^{-1}$ collected with the LHCb detector. [...]
arXiv:1307.6379; LHCB-PAPER-2013-008; CERN-PH-EP-2013-130; LHCB-PAPER-2013-008; CERN-PH-EP-2013-130.- Geneva : CERN, 2013-11-09 - 21 p. - Published in : Eur. Phys. J. C 73 (2013) 2631 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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3.
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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4.
Measurement of $B$ meson production cross-sections in proton-proton collisions at $\sqrt{s}=$ 7 TeV / LHCb Collaboration
The production cross-sections of $B$ mesons are measured using data, corresponding to a integrated luminosity of $0.36{\rm fb^{-1}}$, collected with the LHCb detector at a centre-of-mass energy of 7 TeV. The $B^+$, $B^0$ and $B_s^0$ mesons are reconstructed in the exclusive decays $B^+\to J/\psi K$, $B^0\to J/\psi K^{*0}$ and $B^0_s\to J/\psi\phi$, with $J/\psi\to\mu^+\mu^-$, $K^{*0}\to K^+\pi^-$ and $\phi\to K^+K^-$. [...]
arXiv:1306.3663; CERN-PH-EP-2013-095; LHCB-PAPER-2013-004; CERN-PH-EP-2013-095; LHCB-PAPER-2013-004.- Geneva : CERN, 2013 - 17 p. - Published in : JHEP 08 (2013) 117 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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5.
First observation of the decay $B_{c}^{+}\to J/\psi K^+$ / LHCb collaboration
The decay $B_c^+\to J/\psi K^+$ is observed for the first time using a data sample, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb experiment in $pp$ collisions at a centre-of-mass energy of 7 TeV. A yield of 46$\pm12$ events is reported, with a significance of 5.0 standard deviations. [...]
arXiv:1306.6723; CERN-PH-EP-2013-106; LHCB-PAPER-2013-021; CERN-PH-EP-2013-106; LHCB-PAPER-2013-021.- Geneva : CERN, 2013 - 14 p. - Published in : JHEP 09 (2013) 075 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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6.
Observation of $B^+_c \rightarrow J/\psi D_s^+$ and $B^+_c \rightarrow J/\psi D_s^{*+}$ decays / LHCb Collaboration
The decays $B^+_c \rightarrow J/\psi D_s^+$ and $B^+_c \rightarrow J/\psi D_s^{*+}$ are observed for the first time using a dataset, corresponding to an integrated luminosity of 3$fb^{-1}$, collected by the LHCb experiment in proton-proton collisions at centre-of-mass energies of $\sqrt{s}$=7 and 8 TeV. The statistical significance for both signals is in excess of 9 standard deviations. [...]
arXiv:1304.4530; CERN-PH-EP-2013-051; LHCB-PAPER-2013-010; CERN-PH-EP-2013-051; LHCB-PAPER-2013-010.- Geneva : CERN, 2013-06-28 - 10 p.
- Published in : Phys. Rev. D APS Open Access article: PDF; Fulltext: PDF; Publisher’s Note: PDF; Related data file(s): ZIP; External link: Preprint
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7.
First observation of the decay $B_s^0 \rightarrow \phi \bar{K}^{*0}$ / LHCb collaboration
A first observation of the decay $B_s^0 \rightarrow \phi \bar{K}^{*0}$ is reported from an analysis based on a data sample, corresponding to an integrated luminosity of 1.0 fb$^{-1}$ of $pp$ collisions at $\sqrt{s} = 7 TeV$, collected with the LHCb detector. A yield of $30 \pm 6$ $B_s^0 \to (KK)(K\pi)$ candidates is found in the mass windows $1012.5 < M(KK) < 1026.5 MeV/c^2$ and $746 < M(K\pi)< 1046 MeV/c^2$, corresponding to a signal significance of 6.1 standard deviations. [...]
arXiv:1306.2239; LHCB-PAPER-2013-012; CERN-PH-EP-2013-087; LHCB-PAPER-2013-012; CERN-PH-EP-2013-087.- Geneva : CERN, 2013-11-12 - 22 p. - Published in : JHEP 11 (2013) 092 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
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8.
Search for the rare decay $D^0 \to \mu^+ \mu^-$ / LHCb collaboration
A search for the rare decay $D^0 \to \mu^+ \mu^-$is performed using a data sample, corresponding to an integrated luminosity of 0.9 fb$^{-1}$, of $pp$ collisions collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The observed number of events is consistent with the background expectations and corresponds to an upper limit of ${\cal B}(D^0 \to \mu^+ \mu^-) < 6.2(7.6) \times 10^{-9}$ at 90% (95%) confidence level. [...]
arXiv:1305.5059; CERN-PH-EP-2013-083; LHCB-PAPER-2013-013; CERN-PH-EP-2013-083 LHCb-PAPER-2013-013; CERN-PH-EP-2013-083; LHCB-PAPER-2013-013.- 2013-08-09 - 22 p. - Published in : Phys. Lett. B 725 (2013) 15-24 APS published version, local copy: PDF; Elsevier Open Access article: PDF; Fulltext: 1305.5059 - PDF; arXiv:1305.5059 - PDF; Related data file(s): ZIP; External link: Preprint
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9.
Study of $B^{0} \rightarrow D^{*-}\pi^{+}\pi^{-}\pi^{+}$ and $B^{0} \rightarrow D^{*-}K^{+}\pi^{-}\pi^{+}$ decays / LHCb Collaboration
Using proton-proton collision data collected by the LHCb experiment at $\sqrt{s} =$ 7 TeV, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, the ratio of branching fractions of the $B^{0}\rightarrow D^{*-}\pi^{+}\pi^{-}\pi^{+}$ decay relative to the $B^{0} \rightarrow D^{*-}\pi^{+}$ decay is measured to be \begin{equation*} \frac{\mathcal{B}(B^{0}\rightarrow D^{*-}\pi^{+}\pi^{-}\pi^{+})}{\mathcal{B}(B^{0} \rightarrow D^{*-}\pi^{+})} = 2.64 \pm 0.04\,(\text{stat.}) \pm 0.13\,(\text{syst.})\, . \label{eq:CF_BF_ratio_result} \end{equation*} The Cabibbo-suppressed decay $B^{0}\rightarrow D^{*-}K^{+}\pi^{-}\pi^{+}$ is observed for the first time and the measured ratio of branching fractions is \begin{equation*} \frac{\mathcal{B}(B^{0}\rightarrow D^{*-}K^{+}\pi^{-}\pi^{+})}{\mathcal{B}(B^{0} \rightarrow D^{*-}\pi^{+}\pi^{-}\pi^{+})} = (6.47 \pm 0.37\,(\text{stat.}) \pm 0.35\,(\text{syst.})) \times 10^{-2} \label{eq:CS_BF_ratio_result}\, . [...]
arXiv:1303.6861; LHCB-PAPER-2012-046; CERN-PH-EP-2013-041; CERN-EP-PH-2013-041; LHCB-PAPER-2012-046; CERN-PH-EP-2013-041.- Geneva : CERN, 2013-05-03 - 10 p. - Published in : Phys. Rev. D 87 (2013) 092001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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10.
Measurement of the CKM angle $\gamma$ from a combination of $B^{\pm} \to Dh^{\pm}$ analyses / LHCb collaboration
A combination of three LHCb measurements of the CKM angle $\gamma$ is presented. The decays $B^\pm\to DK^\pm$ and $B^\pm\to D\pi^\pm$ are used, where $D$ denotes an admixture of $D^0$ and $\overline{D^0}$ mesons, decaying into $K^+K^-$, $\pi^+\pi^-$, $K^\pm \pi^\mp$, $K^\pm \pi^\mp \pi^\pm \pi^\mp$, $K_S\pi^+\pi^-$, or $K_S K^+K^-$ final states. [...]
arXiv:1305.2050; CERN-PH-EP-2013-079; LHCB-PAPER-2013-020; CERN-PH-EP-2013-079; LHCB-PAPER-2013-020.- Geneva : CERN, 2013-10-07 - 13 p. - Published in : Phys. Lett. B 726 (2013) 151-163 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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CERN Document Server : 232 εγγραφές βρέθηκαν   1 - 10επόμενοτέλος  μετάβαση στην εγγραφή:
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