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CERN Document Server Sök i 215 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 1.20 sekunder. 
1.
LHCbDirac: Distributed computing in LHCb / Stagni, F (CERN) ; Charpentier, P (CERN) ; Graciani, R (Barcelona U.) ; Tsaregorodtsev, A (Marseille, CPPM) ; Closier, J (CERN) ; Mathe, Z (CERN) ; Ubeda, M (CERN) ; Zhelezov, A (U. Heidelberg (main)) ; Lanciotti, E (CERN) ; Romanovskiy, V (Serpukhov, IHEP) et al.
We present LHCbDirac, an extension of the DIRAC community Grid solution that handles LHCb specificities. The DIRAC software has been developed for many years within LHCb only. [...]
2012 - 10 p. - Published in : J. Phys.: Conf. Ser. 396 (2012) 032104
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.032104
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2.
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
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3.
Measurement of $CP$ violation and constraints on the CKM angle $\gamma$ in $B^{\pm}\rightarrow D K^{\pm}$ with $D \rightarrow K_S^0 \pi^+ \pi^-$ decays / LHCb collaboration
A model-dependent amplitude analysis of $B^{\pm} \rightarrow D K^{\pm}$ with $D \rightarrow K_S^0 \pi^+ \pi^-$ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of $1$ fb$^{-1}$, recorded by LHCb at a centre-of-mass energy of $7$ TeV in $2011$. Values of the $CP$ violation observables $x_{\pm}$ and $y_{\pm}$, which are sensitive to the CKM angle $\gamma$, are measured to be \begin{align*} x_- &= +0.027 \pm 0.044 ^{+0.010}_{-0.008} \pm 0.001, \\ y_- &= +0.013 \pm 0.048 ^{+0.009}_{-0.007} \pm 0.003, \\ x_+ &= -0.084 \pm 0.045 \pm 0.009 \pm 0.005, \\ y_+ &= -0.032 \pm 0.048 ^{+0.010}_{-0.009} \pm 0.008, \end{align*} where the first uncertainty is statistical, the second systematic and the third arises from the uncertainty of the $D \rightarrow K_S^0 \pi^+ \pi^-$ amplitude model. [...]
arXiv:1407.6211; LHCB-PAPER-2014-017; CERN-PH-EP-2014-166; LHCB-PAPER-2014-017; CERN-PH-EP-2014-166.- Geneva : CERN, 2014-11 - 25 p. - Published in : Nucl. Phys. B 888 (2014) 169-193 Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: S0550321314002934 - XML; arXiv:1407.6211 - PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP;
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4.
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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5.
First measurement of the charge asymmetry in beauty-quark pair production / LHCb collaboration
The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in $b\bar{b}$ pair production at a hadron collider. The data used correspond to an integrated luminosity of 1.0fb$^{-1}$ collected at 7TeV center-of-mass energy in proton-proton collisions with the LHCb detector. [...]
arXiv:1406.4789; CERN-PH-EP-2014-130; LHCB-PAPER-2014-023; CERN-PH-EP-2014-130; LHCB-PAPER-2014-023.- Geneva : CERN, 2014-08-20 - 9 p. - Published in : Phys. Rev. Lett. 113 (2014) 082003 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
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6.
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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7.
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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8.
Observation of the $\Lambda_b^0 \rightarrow J/\psi p \pi^-$ decay / LHCb collaboration
The first observation of the Cabibbo-suppressed decay $\Lambda_b^0\rightarrow J/\psi p \pi^-$ is reported using a data sample of proton-proton collisions at 7 and 8 TeV, corresponding to an integrated luminosity of 3 $\rm fb^{-1}$. A prominent signal is observed and the branching fraction relative to the decay mode $\Lambda_b^0\rightarrow J/\psi p K^-$ is determined to be $$ \frac{{\cal B}(\Lambda_b^0\rightarrow J/\psi p \pi^-)}{{\cal B}(\Lambda_b^0\rightarrow J/\psi p K^-)}=0.0824\pm0.0025\:(\text{stat})\pm0.0042\:(\text{syst}). [...]
arXiv:1406.0755; LHCB-PAPER-2014-020; CERN-PH-EP-2014-115; LHCB-PAPER-2014-020; CERN-PH-EP-2014-115.- Geneva : CERN, 2014 - 19 p. - Published in : JHEP 07 (2014) 103 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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9.
Precision measurement of the mass and lifetime of the $\Xi_b^0$ baryon / LHCb collaboration
Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 $\Xi_b^0\to\Xi_c^+\pi^-$, $\Xi_c^+\to pK^-\pi^+$ signal decays are reconstructed. From this sample, the first measurement of the $\Xi_b^0$ baryon lifetime is made, relative to that of the $\Lambda_b^0$ baryon. [...]
arXiv:1405.7223; CERN-PH-EP-2014-107; LHCB-PAPER-2014-021; LHCB-PAPER-2014-021; CERN-PH-EP-2014-107.- Geneva : CERN, 2014-07-15 - 10 p. - Published in : Phys. Rev. Lett. 113 (2014) 032001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; Related supplementary data file(s): ZIP.ZIP; External link: Preprint
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10.
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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CERN Document Server : Sök i 215 journaler efter:   1 - 10nästaslut  gå till journal:
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