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CERN Document Server 110 εγγραφές βρέθηκαν  1 - 10επόμενοτέλος  μετάβαση στην εγγραφή: Η έρευνα πήρε 0.63 δευτερόλεπτα. 
1.
First observation of the Bs2(5840)0B+K and studies of excited B0s mesons / LHCb Collaboration
Properties of the orbitally excited (L=1) Bs states are studied using 1.0 fb1 of pp collisions at s=7 TeV collected with the LHCb detector. The first observation of the Bs2(5840)0 meson decaying to B+K is reported, and the corresponding branching fraction measured relative to the B+K decay mode. [...]
arXiv:1211.5994; LHCB-PAPER-2012-030; CERN-PH-EP-2012-340; LHCB-PAPER-2012-030; CERN-PH-EP-2012-340.- Geneva : CERN, 2013-04-09 - 9 p. - Published in : Phys. Rev. Lett. 110 (2013) 151803 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
2.
Measurement of the time-dependent CP asymmetry in B0J/ψK0S decays / LHCb Collaboration
This Letter reports a measurement of the CP violation observables SJ/ψK0S and CJ/ψK0S in the decay channel B0J/ψK0S performed with 1.0 fb1 of pp collisions at s=7 TeV collected by the LHCb experiment. The fit to the data yields SJ/ψK0S=0.73±0.07(stat)±0.04(syst) and CJ/ψK0S=0.03±0.09(stat)±0.01(syst). [...]
arXiv:1211.6093; LHCB-PAPER-2012-035; CERN-PH-EP-2012-331; LHCB-PAPER-2012-035; CERN-PH-EP-2012-331.- Geneva : CERN, 2013-04-10 - 16 p. - Published in : Phys. Lett. B 721 (2013) 24-31 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
3.
First observation of the decays ˉB0(s)D+sKπ+π and ˉB0sDs1(2536)+π / LHCb collaboration
The first observation of the decays ˉB0sD+sKπ+π and ˉB0D+sKπ+π are reported using an integrated luminosity of 1.0 fb1 recorded by the LHCb experiment. The branching fractions, normalized with respect to ˉB0sD+sππ+π and ˉB0sD+sKπ+π, respectively, are measured to be B(ˉB0sD+sKπ+π)B(ˉB0sD+sππ+π)=(5.2±0.5±0.3)×102, B(ˉB0D+sKπ+π)B(ˉB0sD+sKπ+π)=0.54±0.07±0.07, where the first uncertainty is statistical and the second is systematic. [...]
arXiv:1211.1541; LHCB-PAPER-2012-033; CERN-PH-EP-2012-327; LHCB-PAPER-2012-033; CERN-PH-EP-2012-327.- 2012 - 17 p. - Published in : Phys. Rev. D 86 (2012) 112005 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
4.
A study of the Z production cross-section in pp collisions at s = 7 TeV using tau final states / LHCb Collaboration
A measurement of the inclusive Zττ cross-section in pp collisions at s=7 TeV is presented based on a dataset of 1.0 fb1 collected by the LHCb detector. Candidates for Zττ decays are identified through reconstructed final states with two muons, a muon and an electron, a muon and a hadron, or an electron and a hadron. [...]
arXiv:1210.6289; LHCB-PAPER-2012-029; CERN-PH-EP-2012-314; LHCB-PAPER-2012-029; CERN-PH-EP-2012-314.- Geneva : CERN, 2013 - 15 p. - Published in : JHEP 01 (2013) 111 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
5.
Measurement of the B0--ˉB0 oscillation frequency Δmd with the decays B0Dπ+ and B0J ψK0 / LHCb Collaboration
The B0--ˉB0 oscillation frequency Δmd is measured by the LHCb experiment using a dataset corresponding to an integrated luminosity of 1.0fb1 of proton-proton collisions at s=7TeV, and is found to be Δmd=0.5156±0.0051(stat.)±0.0033(syst.)ps1. The measurement is based on results from analyses of the decays B0Dπ+ (DK+ππ) and B0J ψK0 (J ψμ+μ, K0K+π) and their charge conjugated modes..
arXiv:1210.6750; LHCB-PAPER-2012-032; CERN-PH-EP-2012-315; LHCB-PAPER-2012-032; CERN-PH-EP-2012-315.- Geneva : CERN, 2013-07-16 - 8 p. - Published in : Phys. Lett. B 719 (2013) 318-325 APS published version, local copy: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
6.
First observation of the decay B+π+μ+μ / LHCb Collaboration
A discovery of the rare decay B+π+μ+μ is presented. This decay is observed for the first time, with 5.2 σ significance. [...]
arXiv:1210.2645; LHCB-PAPER-2012-020; CERN-PH-EP-2012-284; LHCB-PAPER-2012-020; CERN-PH-EP-2012-284.- Geneva : CERN, 2012 - 20 p. - Published in : JHEP 12 (2012) 125 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint
7.
Measurement of the CP asymmetry in B0K0μ+μ decays / LHCb Collaboration
A measurement of the CP asymmetry in B0K0μ+μ decays is presented, based on 1.0\,fb1 of pp collision data recorded by the LHCb experiment during 2011. The measurement is performed in six bins of invariant mass squared of the μ+μ pair, excluding the J/ψ and ψ(2S) resonance regions. [...]
arXiv:1210.4492; LHCB-PAPER-2012-021; CERN-PH-EP-2012-302; LHCB-PAPER-2012-021; CERN-PH-EP-2012-302.- Geneva : CERN, 2013-01-17 - 8 p. - Published in : Phys. Rev. Lett. 110 (2013) 031801 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
8.
Measurement of the D± production asymmetry in 7 TeV pp collisions / LHCb Collaboration
The asymmetry in the production cross-section σ of D± mesons, AP=σ(D+)σ(D)σ(D+)+σ(D), is measured in bins of pseudorapidity η and transverse momentum pT within the acceptance of the LHCb detector. The result is obtained with a sample of D+K0Sπ+ decays corresponding to an integrated luminosity of 1.0~fb1, collected in pp collisions at a centre of mass energy of 7~TeV at the Large Hadron Collider. [...]
arXiv:1210.4112; LHCB-PAPER-2012-026; CERN-PH-EP-2012-305; LHCB-PAPER-2012-026; CERN-PH-EP-2012-305.- Geneva : CERN, 2013-01-08 - 18 p. - Published in : Phys. Lett. B 718 (2013) 902-909 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
9.
Evidence for the decay B0J/ψω and measurement of the relative branching fractions of B0s meson decays to J/ψη and J/ψη / LHCb Collaboration
First evidence of the B0J/ψω decay is found and the B0sJ/ψη and B0sJ/ψη decays are studied using a dataset corresponding to an integrated luminosity of 1.0~fb1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of s=7~TeV. The branching fractions of these decays are measured relative to that of the B0J/ψρ0 decay: %The following ratios are measured B(B0J/ψω)B(B0J/ψρ0)$=$0.89±0.19(stat)+0.070.13(syst),B(B0sJ/ψη)B(B0J/ψρ0)$=$14.0±1.2(stat)+1.11.5(syst)+1.11.0(fdfs),B(B0sJ/ψη)B(B0J/ψρ0)$=$12.7±1.1(stat)+0.51.3(syst)+1.00.9(fdfs), where the last uncertainty is due to the knowledge of fd/fs, the ratio of b-quark hadronization factors that accounts for the different production rate of B0 and B0s mesons [...]
arXiv:1210.2631; CERN-PH-EP-2012-287; LHCB-PAPER-2012-022; CERN-PH-EP2012-287; CERN-PH-EP-2012-287; LHCB-PAPER-2012-022.- Geneva : CERN, 2013-02-21 - 23 p. - Published in : Nucl. Phys. B 867 (2013) 547-566 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint
10.
First evidence for the annihilation decay mode B+D+sϕ / LHCb Collaboration
Evidence for the hadronic annihilation decay mode B+D+sϕ is found with greater than 3σ significance. The branching fraction and \CP asymmetry are measured to be \begin{eqnarray} \mathcal{B}(B^{+} \to D_s^{+}\phi) &=& \left(1.87^{\,+1.25}_{\,-0.73}\,({\rm stat}) \pm 0.19\, ({\rm syst}) \pm 0.32\, ({\rm norm})\right) \times 10^{-6}, \nonumber\\ \mathcal{A}_{CP}(B^{+} \to D_s^{+}\phi) &=& -0.01 \pm 0.41\, ({\rm stat}) \pm 0.03\, ({\rm syst}). [...]
arXiv:1210.1089; CERN-PH-EP-2012-286; LHCB-PAPER-2012-025; CERN-PH-EP-2012-286; LHCB-PAPER-2012-025.- Geneva : CERN, 2013 - 19 p. - Published in : JHEP 02 (2013) 043 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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