CERN Accelerating science

CERN Document Server 177 registres trobats  1 - 10següentfinal  anar al registre: La cerca s'ha fet en 0.84 segons. 
1.
Performance of the LHCb Vertex Locator / Aaij, R. (Nikhef, Amsterdam) ; Affolder, A. (Liverpool U.) ; Akiba, K. (UFRJ, Rio de Janeiro) ; Alexander, M. (Glasgow U.) ; Ali, S. (Nikhef, Amsterdam) ; Appleby, R.B. (Manchester U.) ; Artuso, M. (Syracuse U. (main)) ; Bates, A. (Glasgow U.) ; Bay, A. (Ecole Polytechnique, Lausanne) ; Behrendt, O. (CERN) et al. /LHCb VELO Group
The Vertex Locator (VELO) is a silicon microstrip detector that surrounds the proton-proton interaction region in the LHCb experiment. The performance of the detector during the first years of its physics operation is reviewed. [...]
arXiv:1405.7808; CERN-LHCB-DP-2014-001.- 2014 - 61 p. - Published in : JINST 9 (2014) P09007 Fulltext: arXiv:1405.7808 - PDF; 10.1088_1748-0221_9_09_P09007 - PDF; IOP Open Access article: PDF; External link: Preprint
2.
Searches for $\Lambda^0_{b}$ and $\Xi^{0}_{b}$ decays to $K^0_{\rm S} p \pi^{-}$ and $K^0_{\rm S}p K^{-}$ final states with first observation of the $\Lambda^0_{b} \rightarrow K^0_{\rm S}p \pi^{-}$ decay / LHCb collaboration
A search for previously unobserved decays of beauty baryons to the final states $K^0_{\rm\scriptscriptstyle S} p \pi^{-}$ and $K^0_{\rm\scriptscriptstyle S}p K^{-}$ is reported. The analysis is based on a data sample corresponding to an integrated luminosity of $1.0\,$fb$^{-1}$ of $pp$ collisions. [...]
arXiv:1402.0770; LHCB-PAPER-2013-061; CERN-PH-EP-2014-012; LHCB-PAPER-2013-061; CERN-PH-EP-2014-012.- Geneva : CERN, 2014 - 24 p. - Published in : JHEP 04 (2014) 087 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF;
3.
Measurement of the $B_c^+$ meson lifetime using $B_c^+ \to J/\psi\mu^+ \nu_{\mu} X$ decays / LHCb collaboration
The lifetime of the $B_c^+$ meson is measured using semileptonic decays having a $J/\psi$ meson and a muon in the final state. The data, corresponding to an integrated luminosity of $2\mathrm{~fb^{-1}}$, are collected by the LHCb detector in $pp$ collisions at a centre-of-mass energy of $8\,\mathrm{TeV}$. [...]
arXiv:1401.6932; CERN-PH-EP-2014-008; LHCB-PAPER-2013-063; CERN-PH-EP-2014-008; LHCB-PAPER-2013-063.- Geneva : CERN, 2014-05-01 - 28 p. - Published in : Eur. Phys. J. C 74 (2014) 2839 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF;
4.
Search for Majorana neutrinos in $B^- \to \pi^+\mu^-\mu^-$ decays / LHCb collaboration
A search for heavy Majorana neutrinos produced in the $B^- \to \pi^+\mu^-\mu^-$ decay mode is performed using 3 fb$^{-1}$ of integrated luminosity collected with the LHCb detector in $pp$ collisions at center-of-mass energies of 7 TeV and 8 TeV at the LHC. Neutrinos with masses in the range 250-5000 MeV and lifetimes from zero to 1000 ps are probed. [...]
arXiv:1401.5361; CERN-PH-EP-2014-002; LHCB-PAPER-2013-064; LHCB-PAPER-2013-064; CERN-PH-EP-2014-002.- Geneva : CERN, 2014-04-03 - 8 p. - Published in : Phys. Rev. Lett. 112 (2014) 131802 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
5.
Updated measurements of exclusive $J/\psi$ and $\psi(2S)$ production cross-sections in $pp$ collisions at $\sqrt{s}=7$ TeV / LHCb collaboration
The differential cross-section as a function of rapidity has been measured for the exclusive production of $J/\psi$ and $\psi(2S)$ mesons in proton-proton collisions at $\sqrt{s}=7$ TeV, using data collected by the LHCb experiment, corresponding to an integrated luminosity of 930 pb$^{-1}$. The cross-sections times branching fractions to two muons having pseudorapidities between 2.0 and 4.5 are measured to be $$\begin{array}{rl} \sigma_{pp\rightarrow J/\psi\rightarrow{\mu^+}{\mu^-}}(2.0<\eta_{\mu^\pm }<4.5)=&291\pm 7\pm19 {\rm \ pb},\\ \sigma_{pp\rightarrow\psi(2S)\rightarrow{\mu^+}{\mu^-}}(2.0<\eta_{\mu^\pm}<4.5)=&6.5\pm 0.9\pm 0.4 {\rm \ pb},\end{array}$$ where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1401.3288; CERN-PH-EP-2013-233; LHCB-PAPER-2013-059; CERN-PH-EP-2013-233; LHCB-PAPER-2013-059.- Geneva : CERN, 2014 - 20 p. - Published in : J. Phys. G 41 (2014) 055002 Fulltext: PDF; IOP Open Access article: PDF; Related data file(s): TAR; External link: Preprint
6.
Observation of associated production of a $Z$ boson with a $D$ meson in the forward region / LHCb collaboration
A search for associated production of a $Z$ boson with an open charm meson is presented using a data sample, corresponding to an integrated luminosity of $1.0\mathrm{fb}^{-1}$ of proton--proton collisions at a centre-of-mass energy of 7 TeV, collected by the LHCb experiment. Seven candidate events for associated production of a $Z$ boson with a $D^0$ meson and four candidate events for a $Z$ boson with a $D^+$ meson are observed with a combined significance of 5.1 standard deviations. [...]
arXiv:1401.3245; CERN-PH-EP-2013-235; LHCB-PAPER-2013-062; CERN-EP-2013-235; CERN-PH-EP-2013-235; LHCB-PAPER-2013-062.- Geneva : CERN, 2014 - 17 p. - Published in : JHEP(2014)091 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; Supplementary Related data file(s): ZIP; External link: Preprint
7.
Measurement of the $\bar{B}_s^0\to D_s^-D_s^+$ and $\bar{B}_s^0\to D^-D_s^+$ effective lifetimes / LHCb collaboration
The first measurement of the effective lifetime of the $\bar{B}_s^0$ meson in the decay $\bar{B}_s^0\to D_s^-D_s^+$ is reported using a proton-proton collision dataset, corresponding to an integrated luminosity of 3 fb$^{-1}$, collected by the LHCb experiment. The measured value of the $\bar{B}_s^0\to D_s^-D_s^+$ effective lifetime is $1.379\pm0.026\pm0.017$ ps, where the uncertainties are statistical and systematic, respectively. [...]
arXiv:1312.1217; LHCB-PAPER-2013-060; CERN-PH-EP-2013-218; LHCB-PAPER-2013-060; CERN-PH-EP-2013-218.- Geneva : CERN, 2014-03-19 - 9 p. - Published in : Phys. Rev. Lett. 112 (2014) 111802 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary related data file(s): ZIP; External link: Preprint
8.
Studies of beauty baryon decays to $D^0 ph^-$ and $\Lambda_c^+ h^-$ final states / LHCb collaboration
Decays of beauty baryons to the $D^0 p h^-$ and $\Lambda_c^+ h^-$ final states (where $h$ indicates a pion or a kaon) are studied using a data sample of $pp$ collisions, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb detector. The Cabibbo-suppressed decays $\Lambda_b^0\to D^0 p K^-$ and $\Lambda_b^0\to \Lambda_c^+ K^-$ are observed and their branching fractions are measured with respect to the decays $\Lambda_b^0\to D^0 p \pi^-$ and $\Lambda_b^0\to \Lambda_c^+ \pi^-$. [...]
arXiv:1311.4823; CERN-PH-EP-2013-207; LHCB-PAPER-2013-056; CERN-PH-EP-2013-207; LHCB-PAPER-2013-056.- Geneva : CERN, 2014-02-13 - 15 p. - Published in : Phys. Rev. D 89 (2014) 032001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
9.
Study of forward Z+jet production in pp collisions at $\sqrt{s}$ = 7 TeV / LHCb collaboration
A measurement of the $Z(\rightarrow\mu^+\mu^-)$+jet production cross-section in $pp$ collisions at a centre-of-mass energy $\sqrt{s} = 7$ TeV is presented. The analysis is based on an integrated luminosity of $1.0\,\text{fb}^{-1}$ recorded by the LHCb experiment. [...]
arXiv:1310.8197; LHCB-PAPER-2013-058; CERN-PH-EP-2013-198; LHCB-PAPER-2013-058; CERN-PH-EP-2013-198.- Geneva : CERN, 2014-01 - 22 p. - Published in : JHEP 01 (2014) 033 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; Supplementary Related data file(s): ZIP; External link: Rivet analyses reference
10.
Search for CP violation in the decay $D^+ \to \pi^-\pi^+\pi^+$ / LHCb collaboration
A search for CP violation in the phase space of the decay $D^+\to\pi^-\pi^+\pi^+$ is reported using $pp$ collision data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. The Dalitz plot distributions for $3.1\times 10^6$ $D^+$ and $D^-$ candidates are compared with binned and unbinned model-independent techniques. [...]
arXiv:1310.7953; LHCB-PAPER-2013-057; CERN-PH-EP-2013-199; LHCB-PAPER-2013-057; CERN-PH-EP-2013-199.- Geneva : CERN, 2014-01-20 - 11 p. - Published in : Phys. Lett. B 728 (2014) 585-595 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP;

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