CERN Accelerating science

CERN Document Server 365 záznamov nájdených  1 - 10ďalšíkoniec  skoč na záznam: Hľadanie trvalo 0.76 sekúnd. 
1.
Spectroscopy in Beauty Decays at the LHCb Experiment / LHCb Collaboration
The beauty hadron decays is unique laboratory to study charmonium and charmonium-like states, such as the χc1(3872) meson, other exotic states and the tensor D-wave Ψ2(3823) states. However the nature of many exotic charmonium-like candidates are still unknown. [...]
arXiv:2103.04453; LHCb-PROC-2021-006; CERN-LHCb-PROC-2021-006; CERN-LHCb-PROC-2021-006.- Geneva : CERN, 2021 - 7 p. - Published in : Acta Phys. Pol. B 52 (2021) 1047 Fulltext: document - PDF; 2103.04453 - PDF; LHCb-PROC-2021-006 - PDF;
In : XXVII Cracow Epiphany Conference on Future of particle physics (Epiphany2021), Online, Poland, 7 - 10 Jan 2021, pp.1047
2.
Angular Analysis of the B+K+μ+μ Decay / LHCb Collaboration
We present an angular analysis of the B+K+(K0Sπ+)μ+μ decay using 9fb1 of pp collision data collected with the LHCb experiment. For the first time, the full set of CP-averaged angular observables is measured in intervals of the dimuon invariant mass squared. [...]
arXiv:2012.13241; LHCb-PAPER-2020-041; CERN-EP-2020-239.- 2021-04-23 - 11 p. - Published in : Phys. Rev. Lett. 126 (2021) 161802 Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from Publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
3.
Observation of the B0sD±D decay / LHCb Collaboration
A search for the B0sD±D decay is performed using proton-proton collision data at centre-of-mass energies of 7, 8 and 13TeV collected by the LHCb experiment, corresponding to an integrated luminosity of 9fb1. The decay is observed with a high significance and its branching fraction relative to the B0D±D decay is measured to be B(B0sD±D)B(B0D±D)=0.137±0.017±0.002±0.006, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainty on the ratio of the B0s and B0 hadronisation fractions..
arXiv:2012.11341; LHCb-PAPER-2020-037; CERN-EP-2020-230.- 2021-03-09 - 19 p. - Published in : JHEP 2103 (2021) 099 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
4.
Measurement of CP violation in the decay B+K+π0 / LHCb Collaboration
A measurement of direct CP violation in the decay B+K+π0 is reported using a data sample corresponding to an integrated luminosity of 5.4 fb1, collected with the LHCb experiment at a center-of-mass energy of s=13 TeV. The CP asymmetry is measured to be 0.025±0.015±0.006±0.003, where the uncertainties are statistical, systematic, and due to an external input, respectively. [...]
arXiv:2012.12789; LHCb-PAPER-2020-040; CERN-EP-2020-242.- 2021-03-02 - 11 p. - Published in : Phys. Rev. Lett. 126 (2021) 091802 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; supplementary information: ZIP;
5.
Evidence of a J/ψΛ structure and observation of excited Ξ states in the ΞbJ/ψΛK decay / LHCb Collaboration
First evidence of a structure in the J/ψΛ invariant mass distribution is obtained from an amplitude analysis of ΞbJ/ψΛK decays. The observed structure is consistent with being due to a charmonium pentaquark with strangeness. [...]
arXiv:2012.10380; LHCb-PAPER-2020-039; CERN-EP-2020-233.- 2021-07-15 - 21 p. - Published in : Sci. Bull. 66 (2021) 1278-1287 Fulltext: PDF; Fulltext from publisher: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
6.
Measurement of CP observables in B±D()K± and B±D()π± decays using two-body D final states / LHCb Collaboration
Measurements of CP observables in B±D()K± and B±D()π± decays are presented, where D() indicates a neutral D or D meson that is an admixture of meson and anti-meson states. Decays of the D meson to the Dπ0 and Dγ final states are partially reconstructed without inclusion of the neutral pion or photon. [...]
arXiv:2012.09903; LHCb-PAPER-2020-036; CERN-EP-2020-225; LHCB-PAPER-2020-036.- 2021-04-09 - 36 p. - Published in : JHEP 2104 (2021) 081 Article from SCOAP3: PDF; Fulltext: 2012.09903 - PDF; LHCb-PAPER-2020-036 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
7.
Observation of CP violation in two-body B0(s)-meson decays to charged pions and kaons / LHCb Collaboration
The time-dependent CP asymmetries of B0π+π and B0sK+K decays are measured using a data sample of pp collisions corresponding to an integrated luminosity of 1.9 fb1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. The results are Cππ=0.311±0.045±0.015,Sππ=0.706±0.042±0.013,CKK=0.164±0.034±0.014,SKK=0.123±0.034±0.015,AΔΓKK=0.830±0.050±0.09, where the first uncertainties are statistical and the second systematic. [...]
arXiv:2012.05319; LHCb-PAPER-2020-029; CERN-EP-2020-215; LHCB-PAPER-2020-029.- Geneva : CERN, 2021-03-08 - 43 p. - Published in : JHEP 2103 (2021) 075 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary material: ZIP; External link: Previous draft version
8.
Amplitude analysis of the B+D+DK+ decay / LHCb Collaboration
Results are reported from an amplitude analysis of the B+D+DK+ decay. The analysis is carried out using LHCb proton-proton collision data taken at s=7,8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb1. [...]
arXiv:2009.00026; LHCb-PAPER-2020-025; CERN-EP-2020-159.- 2020-12-07 - 48 p. - Published in : Phys. Rev. D 102 (2020) 112003 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
9.
Observation of the Λ0bΛ+cK+Kπ decay / LHCb Collaboration
The Λ0bΛ+cK+Kπ decay is observed for the first time using a data sample of proton-proton collisions at centre-of-mass energies of s=7 and 8 TeV collected by the LHCb detector, corresponding to an integrated luminosity of 3fb1. The ratio of branching fractions between the Λ0bΛ+cK+Kπ and the Λ0bΛ+cDs decays is measured to be B(Λ0bΛ+cK+Kπ)B(Λ0bΛ+cDs)=(9.26±0.29±0.46±0.26)×102, where the first uncertainty is statistical, the second systematic and the third is due to the knowledge of the DsK+Kπ branching fraction. [...]
arXiv:2011.13738; LHCb-PAPER-2020-028; CERN-EP-2020-209; LHCB-PAPER-2020-028; LHCB-PAPER-2020-028.- Geneva : CERN, 2021-04-10 - 20 p. - Published in : Phys. Lett. B 815 (2021) 136172 Article from SCOAP3: PDF; Fulltext: PAPER-LHCb-2020-028-arXiv - PDF; 2011.13738 - PDF; Related data file(s): ZIP;
10.
Measurement of the CKM angle γ and B0s¯B0s mixing frequency with B0sDsh±π±π decays / LHCb Collaboration
The CKM angle γ is measured for the first time from mixing-induced CP violation between B0sDsK±π±π and ˉB0sD±sKππ± decays reconstructed in proton-proton collision data corresponding to an integrated luminosity of 9 fb1 recorded with the LHCb detector. A time-dependent amplitude analysis is performed to extract the CP-violating weak phase γ2βs and, subsequently, γ by taking the B0s-ˉB0s mixing phase βs as an external input. [...]
arXiv:2011.12041; LHCb-PAPER-2020-030; CERN-EP-2020-214; LHCB-PAPER-2020-030.- Geneva : CERN, 2021-03-15 - 46 p. - Published in : JHEP 2103 (2021) 137 Article from SCOAP3: PDF; Fulltext: LHCb-PAPER-2020-030_arxiv - PDF; 2011.12041 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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