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CERN Document Server 51 elementer funnet  1 - 10nesteslutt  gå til element: Søket tok 0.57 sekunder. 
1.
Observation of charmonium pairs produced exclusively in $pp$ collisions / LHCb collaboration
A search is performed for the central exclusive production of pairs of charmonia produced in proton-proton collisions. Using data corresponding to an integrated luminosity of $3{\rm\ fb}^{-1}$ collected at centre-of-mass energies of 7 and 8 TeV, $J/\psi J/\psi$ and $J/\psi\psi(2S)$ pairs are observed, which have been produced in the absence of any other activity inside the LHCb acceptance that is sensitive to charged particles in the pseudorapidity ranges $(-3.5,-1.5)$ and $(1.5,5.0)$. [...]
arXiv:1407.5973; CERN-PH-EP-2014-174; LHCB-PAPER-2014-027; LHCB-PAPER-2014-027; CERN-PH-EP-2014-174.- Geneva : CERN, 2014-09-19 - 20 p. - Published in : J. Phys. G 41 (2014) 115002 Fulltext: PDF; IOP Open Access article: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; External link: Preprint
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2.
Effective lifetime measurements in the $B_{s}^{0} \rightarrow K^{+}K^{-}$, $B^{0} \rightarrow K^{+}\pi^{-}$ and $B_{s}^{0} \rightarrow \pi^{+}K^{-}$ decays / LHCb collaboration
Measurements of the effective lifetimes in the $B_{s}^{0} \rightarrow K^{+}K^{-}$, $B^{0} \rightarrow K^{+}\pi^{-}$ and $B_{s}^{0} \rightarrow \pi^{+}K^{-}$ decays are presented using $1.0~\mathrm{fb^{-1}}$ of $pp$ collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. [...]
arXiv:1406.7204; CERN-PH-EP-2014-127; LHCB-PAPER-2014-011; CERN-PH-EP-2014-127; LHCB-PAPER-2014-011.- Geneva : CERN, 2014-09-07 - 9 p. - Published in : Phys. Lett. B 736 (2014) 446-454 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP;
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3.
Observation of $Z$ production in proton-lead collisions at LHCb / LHCb collaboration
The first observation of $Z$ boson production in proton-lead collisions at a centre-of-mass energy per proton-nucleon pair of $\sqrt{s_{NN}}=5~\text{TeV}$ is presented. The data sample corresponds to an integrated luminosity of $1.6~\text{nb}^{-1}$ collected with the LHCb detector. [...]
arXiv:1406.2885; CERN-PH-EP-2014-126; LHCB-PAPER-2014-022; CERN-PH-EP-2014-126; LHCB-PAPER-2014-022.- Geneva : CERN, 2014 - 18 p. - Published in : JHEP 09 (2014) 030 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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4.
Search for $CP$ violation in $D^{\pm}\rightarrow K^0_S K^{\pm}$ and $D^{\pm}_{s}\rightarrow K^0_S \pi^{\pm}$ decays / LHCb collaboration
A search for $CP$ violation in Cabibbo-suppressed $D^{\pm}\rightarrow K^0_S K^{\pm}$ and $D^{\pm}_{s}\rightarrow K^0_S \pi^{\pm}$ decays is performed using $pp$ collision data, corresponding to an integrated luminosity of 3~fb$^{-1}$, recorded by the LHCb experiment. The individual $CP$-violating asymmetries are measured to be \begin{eqnarray*} \mathcal{A}_{CP}^{D^{\pm}\rightarrow K^0_S K^{\pm}} & = & (+0.03 \pm 0.17 \pm 0.14) \% \\ \mathcal{A}_{CP}^{D^{\pm}_s\rightarrow K^0_S \pi^{\pm}} & = & (+0.38 \pm 0.46 \pm 0.17) \%, \end{eqnarray*} assuming that $CP$ violation in the Cabibbo-favoured decays is negligible. [...]
arXiv:1406.2624; CERN-PH-EP-2014-125; LHCB-PAPER-2014-018; LHCB-PAPER-2014-018; CERN-PH-EP-2014-125.- Geneva : CERN, 2014-10-03 - 19 p. - Published in : JHEP 10 (2014) 025 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP; Springer Open Access article: PDF;
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5.
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
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6.
Study of the kinematic dependences of $\Lambda_b^0$ production in $pp$ collisions and a measurement of the $\Lambda_b^0 \rightarrow \Lambda_c^+ \pi^-$ branching fraction / LHCb collaboration
The kinematic dependences of the relative production rates, $f_{\Lambda_b^0}/f_d$, of $\Lambda_b^0$ baryons and $\bar{B}^0$ mesons are measured using $\Lambda_b^0 \rightarrow \Lambda_c^+ \pi^-$ and $\bar{B}^0 \rightarrow D^+ \pi^-$ decays. The measurements use proton-proton collision data, corresponding to an integrated luminosity of 1 fb$^{-1}$ at a centre-of-mass energy of 7 TeV, recorded in the forward region with the LHCb experiment. [...]
arXiv:1405.6842; CERN-PH-EP-2014-106; LHCB-PAPER-2014-004; CERN-PH-EP-2014-106; LHCB-PAPER-2014-004.- Geneva : CERN, 2014 - 19 p. - Published in : JHEP 08 (2014) 143 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
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7.
Differential branching fractions and isospin asymmetries of $B \to K^{(*)} \mu^+ \mu^-$ decays / LHCb collaboration
The isospin asymmetries of $B \to K\mu^+\mu^-$ and $B \to K^{*}\mu^+\mu^-$ decays and the partial branching fractions of the $B^0 \to K^0\mu^+\mu^-$, $B^+ \to K^+\mu^+\mu^-$ and $B^+ \to K^{*+}\mu^+\mu^-$ decays are measured as functions of the dimuon mass squared, $q^2$. The data used correspond to an integrated luminosity of 3 fb$^{-1}$ from proton-proton collisions collected with the LHCb detector at centre-of-mass energies of 7 TeV and 8 TeV in 2011 and 2012, respectively. [...]
arXiv:1403.8044; LHCB-PAPER-2014-006; CERN-PH-EP-2014-055; LHCB-PAPER-2014-006; CERN-PH-EP-2014-055.- Geneva : CERN, 2014 - 22 p. - Published in : JHEP 06 (2014) 133 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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8.
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
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9.
Central Exclusive Production of $\chi$ Mesons at LHCb / Bjornstad, Pal Marius
The LHCb experiment is a forward spectrometer at the Large Hadron Collider, covering a range of pseudorapidity $1.9<\eta<4.9$ [...]
CERN-THESIS-2013-217 - 192 p.

Fulltext
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10.
Measurement of the $C\!P$ asymmetry in $B^+ \rightarrow K^+ \mu^+ \mu^-$ decays / LHCb collaboration
A measurement of the $C\!P$ asymmetry in $B^+ \rightarrow K^+ \mu^+ \mu^-$ decays is presented using $pp$ collision data, corresponding to an integrated luminosity of 1.0 fb $^{-1}$, recorded by the LHCb experiment during 2011 at a centre-of-mass energy of 7 TeV. The measurement is performed in seven bins of $\mu^+ \mu^-$ invariant mass squared in the range 0.05 < $q^{2}$ < 22.00 GeV$^{2}/c^4$, excluding the ${J\mskip -3mu/\mskip -2mu \psi\mskip 2mu}$ and $\psi{(2S)}$ resonance regions. [...]
arXiv:1308.1340; CERN-PH-EP-2013-145; LHCB-PAPER-2013-043; CERN-PH-EP-2013-145; LHCB-PAPER-2013-043.- Geneva : CERN, 2013-10-07 - 9 p. - Published in : Phys. Rev. Lett. 111 (2013) 151801 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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2 Bjornstad, P M
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