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CERN Document Server Znaleziono 42 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 1.05 sekund. 
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
2.
Measurements of $C\!P$ violation in the three-body phase space of charmless $B^{\pm}$ decays / LHCb Collaboration
Additional abstract: The additional document presents figures of the projections into the two-body invariant masses of the spectra of $B^{\pm} \to K^{\pm}\pi^+\pi^-, B^{\pm} \to K^{\pm}K^+K^-, B^{\pm} \to \pi^{\pm} K^+ K^-$ and $B^{\pm} \to \pi^{\pm} \pi^+ \pi^-$ decays. The figures show additional information related to the CP asymmetry in phase space, for section VII of the article Physical Review D 90, 112004 (2014)..
arXiv:1408.5373; CERN-PH-EP-2014-203; LHCB-PAPER-2014-044; LHCB-PAPER-2014-044; arXiv:1408.5373.- Geneva : CERN, 2014-12-11 - 17 p. - Published in : Phys. Rev. D 90 (2014) 112004 APS Open Access article: PDF; Additional document: PDF; Additional info: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): LHCb-PAPER-2014-044_supplementary - ZIP; LHCb-PAPER-2014-044_AddInfo_figs_v3 - ZIP; External link: Preprint
3.
Measurement of the forward $W$ boson cross-section in $pp$ collisions at $\sqrt{s} $ = 7 TeV / LHCb collaboration
A measurement of the inclusive $W \to \mu\nu$ production cross-section using data from $pp$ collisions at a centre-of-mass energy of $\sqrt{s} = 7 {\rm \, TeV}$ is presented. The analysis is based on an integrated luminosity of about $1.0 {\rm \, fb}^{-1}$ recorded with the LHCb detector. [...]
arXiv:1408.4354; LHCB-PAPER-2014-033; CERN-PH-EP-2014-175; LHCB-PAPER-2014-033; CERN-PH-EP-2014-175.- Geneva : CERN, 2014-12-10 - 29 p. - Published in : JHEP 12 (2014) 079 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
4.
Measurement of the CKM angle $\gamma$ using $B^\pm \to D K^\pm$ with $D \to K^0_{\rm S} \pi^+\pi^-, K^0_{\rm S} K^+ K^-$ decays / LHCb Collaboration
A binned Dalitz plot analysis of $B^\pm \to D K^\pm$ decays, with $D \to K^0_{\rm S} \pi^+\pi^-$ and $D \to K^0_{\rm S} K^+ K^-$, is performed to measure the $C\!P$-violating observables $x_{\pm}$ and $y_{\pm}$, which are sensitive to the Cabibbo-Kobayashi-Maskawa angle $\gamma$. The analysis exploits a sample of proton-proton collision data corresponding to 3.0 fb$^{-1}$ collected by the LHCb experiment. [...]
arXiv:1408.2748; LHCB-PAPER-2014-041; CERN-PH-EP-2014-202; LHCB-PAPER-2014-041; CERN-PH-EP-2014-202.- Geneva : CERN, 2014-10-16 - 32 p. - Published in : JHEP 10 (2014) 097 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
5.
Measurement of the track reconstruction efficiency at LHCb / LHCb collaboration
The determination of track reconstruction efficiencies at LHCb using $J/\psi\rightarrow\mu^{+}\mu^{-}$ decays is presented. Efficiencies above $95\%$ are found for the data taking periods in 2010, 2011, and 2012. [...]
arXiv:1408.1251; CERN-LHCB-DP-2013-002; LHCB-DP-2013-002.- 2015-02-12 - 24 p. - Published in : JINST 10 (2015) P02007 Fulltext: 10.1088_1748-0221_10_02_P02007 - PDF; arXiv:1408.1251 - PDF; IOP Open Access article: PDF; External link: Preprint
6.
First observations of the rare decays $B^+\!\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and $B^+\!\rightarrow\phi K^+\mu^+\mu^-$ / LHCb collaboration
First observations of the rare decays $B^+\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and $B^+\rightarrow \phi K^+\mu^+\mu^-$ are presented using data corresponding to an integrated luminosity of $3.0\,\mbox{fb}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of $7$ and $8\mathrm{\,TeV}$. The branching fractions of the decays are \begin{eqnarray*} \mathcal{B}(B^+\rightarrow K^+\pi^+\pi^-\mu^+\mu^-) &=& (4.36\,^{+0.29}_{-0.27}\,\mathrm{(stat)}\pm 0.21\,\mathrm{(syst)}\pm0.18\,\mathrm{(norm)})\times10^{-7},\\ \mathcal{B}(B^+\rightarrow\phi K^+\mu^+\mu^-) &=& (0.82 \,^{+0.19}_{-0.17}\,\mathrm{(stat)}\,^{+0.10}_{-0.04}\,\mathrm{(syst)}\pm0.27\,\mathrm{(norm)}) \times10^{-7},\end{eqnarray*} where the uncertainties are statistical, systematic, and due to the uncertainty on the branching fractions of the normalisation modes. [...]
arXiv:1408.1137; LHCB-PAPER-2014-030; CERN-PH-EP-2014-193; LHCB-PAPER-2014-030; CERN-PH-EP-2014-193.- Geneva : CERN, 2014-10-09 - 18 p. - Published in : JHEP 10 (2014) 064 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
7.
Measurement of $C\!P$ asymmetries in the decays $B^0 \rightarrow K^{*0} \mu^+ \mu^-$ and $B^+ \rightarrow K^{+} \mu^+ \mu^-$ / LHCb collaboration
The direct $C\!P$ asymmetries of the decays $B^0 \rightarrow K^{*0} \mu^+ \mu^-$ and $B^+ \rightarrow K^{+} \mu^+ \mu^-$ are measured using $pp$ collision data corresponding to an integrated luminosity of 3.0$\mbox{fb}^{-1}$ collected with the LHCb detector. The respective control modes $B^0 \rightarrow J/\psi K^{*0}$ and $B^+ \rightarrow J/\psi K^{+}$ are used to account for detection and production asymmetries. [...]
arXiv:1408.0978; CERN-PH-EP-2014-191; LHCB-PAPER-2014-032; CERN-PH-EP-2014-191; LHCB-PAPER-2014-032.- Geneva : CERN, 2014-09-30 - 19 p. - Published in : JHEP 09 (2014) 177 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
8.
First observation of a baryonic $B_c^+$ decay / LHCb collaboration
A baryonic decay of the $B_c^+$ meson, $B_c^+\to J/\psi p\overline{p}\pi^+$, is observed for the first time, with a significance of $7.3$ standard deviations, in $pp$ collision data collected with the LHCb detector and corresponding to an integrated luminosity of $3.0$ fb$^{-1}$ taken at center-of-mass energies of $7$ and $8$ $\mathrm{TeV}$. With the $B_c^+\to J/\psi \pi^+$ decay as normalization channel, the ratio of branching fractions is measured to be \begin{equation*} \frac{\mathcal{B}(B_c^+\to J/\psi p\overline{p}\pi^+)}{\mathcal{B}(B_c^+\to J/\psi \pi^+)} = 0.143^{\,+\,0.039}_{\,-\,0.034}\,(\mathrm{stat})\pm0.013\,(\mathrm{syst}). [...]
arXiv:1408.0971; CERN-PH-EP-2014-187; LHCB-PAPER-2014-039; CERN-PH-EP-2014-187; LHCB-PAPER-2014-039.- Geneva : CERN, 2014-10-10 - 9 p. - Published in : Phys. Rev. Lett. 113 (2014) 152003 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
9.
Measurement of the $\bar{B}^0-B^0$ and $\bar{B}^0_s-B^0_s$ production asymmetries in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb collaboration
The $\bar{B}^0-B^0$ and $\bar{B}^0_s-B^0_s$ production asymmetries, $A_\mathrm{P}(B^0)$ and $A_\mathrm{P}(B^0_s)$, are measured by means of a time-dependent analysis of $B^0 \to J/\psi K^{*0}$, $B^0 \to D^- \pi^+$ and $B^0_s \to D_s^- \pi^+$ decays, using a data sample corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by LHCb in $pp$ collisions at a centre-of-mass energy of 7 TeV. The measurements are performed as a function of transverse momentum and pseudorapidity of the $B^0$ and $B^0_s$ mesons within the LHCb acceptance. [...]
arXiv:1408.0275; CERN-PH-EP-2014-181; LHCB-PAPER-2014-042; CERN-PH-EP-2014-181; LHCB-PAPER-2014-042.- Geneva : CERN, 2014-12-12 - 11 p. - Published in : Phys. Lett. B 739 (2014) 218 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: S037026931400728X - XML; arXiv:1408.0275 - PDF; Related data file(s): ZIP; External link: Preprint
10.
Measurement of $CP$ violation parameters in $B^0 \to D K^{*0}$ decays / LHCb collaboration
An analysis of $B^0 \to D K^{*0}$ decays is presented, where $D$ represents an admixture of $D^0$ and $\overline{D}^0$ mesons reconstructed in four separate final states: $K^-\pi^+$, $\pi^-K^+$, $K^+ K^-$ and $\pi^+\pi^-$. The data sample corresponds to 3.0 fb$^-1$ of proton-proton collision, collected by the LHCb experiment. [...]
arXiv:1407.8136; LHCB-PAPER-2014-028; CERN-PH-EP-2014-182; LHCB-PAPER-2014-028; CERN-PH-EP-2014-182.- Geneva : CERN, 2014-12-02 - 14 p. - Published in : Phys. Rev. D 90 (2014) 112002 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint

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