CERN Accelerating science

CERN Document Server 187 のレコードが見つかりました。  1 - 10次最後  レコードへジャンプ: 検索にかかった時間: 0.62 秒 
1.
The LHCb upgrade I / LHCb Collaboration
The LHCb upgrade represents a major change of the experiment. The detectors have been almost completely renewed to allow running at an instantaneous luminosity five times larger than that of the previous running periods. [...]
arXiv:2305.10515; LHCb-DP-2022-002.- 2024-05-23 - 232 p. - Published in : JINST 19 (2024) P05065 Fulltext: document - PDF; 2305.10515 - PDF;
In : The Large Hadron Collider and The Experiments for Run 3
2.
Measurement of Υ production in pp collisions at s=5 TeV / LHCb Collaboration
The production cross-sections of Υ mesons, namely Υ(1S), Υ(2S) and Υ(3S), in pp collisions at s=5 TeV are measured with a data sample corresponding to an integrated luminosity of 9.13±0.18 pb1 collected by the LHCb detector. The Υ mesons are reconstructed in the decay mode Υμ+μ. [...]
arXiv:2212.12664; LHCb-PAPER-2022-036; CERN-EP-2022-269.- 2023-07-07 - 21 p. - Published in : JHEP 2307 (2023) 069 Figures: ZIP; Fulltext: document - PDF; 2212.12664 - PDF;
3.
Search for the rare decays W+D+sγ and ZD0γ at LHCb / LHCb Collaboration
A search for the rare decays W+D+sγ and ZD0γ is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 2.0 fb1. No significant signal is observed for either decay mode and upper limits on their branching fractions are set using W+μ+ν and Zμ+μ decays as normalization channels. [...]
arXiv:2212.07120; CERN-EP-2022-252; LHCb-PAPER-2022-033; LHCB-PAPER-2022-033.- Geneva : CERN, 2023 - 15 p. - Published in : Chin. Phys. C 47 (2023) 093002 Fulltext: 2212.07120 - PDF; LHCb-PAPER-2022-033 - PDF; document - PDF; Related data file(s): ZIP;
4.
Open charm production and asymmetry in pNe collisions at sNN= 68.5 GeV / LHCb Collaboration
A measurement of D0 meson production by the LHCb experiment in its fixed-target configuration is presented. The production of D0 mesons is studied with a beam of 2.5 TeV protons colliding on a gaseous neon target at rest, corresponding to a nucleon-nucleon centre-of-mass energy of sNN = 68.5 GeV [...]
arXiv:2211.11633; CERN-EP-2022-217; LHCb-PAPER-2022-015; LHCB-PAPER-2022-015.- Geneva : CERN, 2023-06-27 - 11 p. - Published in : Eur. Phys. J. C
Fulltext: document - PDF; 2211.11633 - PDF; Related data file(s): ZIP;
5.
First observation of the B+D+sDsK+ decay / LHCb Collaboration
The B+D+sDsK+ decay is observed for the first time using proton-proton collision data collected by the LHCb detector at centre-of-mass energies of 7, 8 and 13TeV, corresponding to an integrated luminosity of 9fb1. Its branching fraction relative to that of the B+D+DK+ decay is measured to be B(B+D+sDsK+)B(B+D+DK+)=0.525±0.033±0.027±0.034, where the first uncertainty is statistical, the second systematic, and the third is due to the uncertainties on the branching fractions of the D±sKK±π± and D±Kπ±π± decays. [...]
arXiv:2211.05034; LHCb-PAPER-2022-019; CERN-EP-2022-205.- Geneva : CERN, 2023-08-01 - 14 p. - Published in : Phys. Rev. Lett. 108 (2023) 034012 Fulltext: 2211.05034 - PDF; Publication - PDF; Related data file(s): ZIP;
6.
Study of the BΛ+cˉΛcK decay / LHCb Collaboration
The decay BΛ+cˉΛcK is studied in proton-proton collisions at a center-of-mass energy of s=13 TeV using data corresponding to an integrated luminosity of 5 fb1 collected by the LHCb experiment. In the Λ+cK system, the Ξc(2930)0 state observed at the BaBar and Belle experiments is resolved into two narrower states, Ξc(2923)0 and Ξc(2939)0, whose masses and widths are measured to be m(Ξc(2923)0)=2924.5±0.4±1.1MeV,m(Ξc(2939)0)=2938.5±0.9±2.3MeV,Γ(Ξc(2923)0)=0004.8±0.9±1.5MeV,Γ(Ξc(2939)0)=0011.0±1.9±7.5MeV, where the first uncertainties are statistical and the second systematic. [...]
arXiv:2211.00812; CERN-EP-2022-196; LHCb-PAPER-2022-028.- Geneva : CERN, 2023-07-27 - 15 p. - Published in : Phys. Rev. D 108 (2023) 012020 Fulltext: Publication - PDF; LHCb_PAPER_2022_028 - PDF; 2211.00812 - PDF; Related data file(s): ZIP;
7.
Observation of the B0sD+D decay / LHCb Collaboration
The first observation of the B0sD+D decay and the measurement of its branching ratio relative to the B0dD+D decay are presented. The data sample used corresponds to an integrated luminosity of 9 fb1 of proton-proton collisions recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV between 2011 and 2018. [...]
arXiv:2210.14945; LHCb-PAPER-2022-023; CERN-EP-2022-193; LHCB-PAPER-2022-023.- Geneva : CERN, 2023-07-13 - 12 p. - Published in : JHEP 2307 (2023) 119 Fulltext: LHCB-PAPER-2022-023 - PDF; document - PDF; 2210.14945 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
8.
Observation of a resonant structure near the D+sDs threshold in the B+D+sDsK+ decay / LHCb Collaboration
An amplitude analysis of the B+D+sDsK+ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV. A near-threshold peaking structure, referred to as X(3960), is observed in the D+sDs invariant-mass spectrum with significance greater than 12 standard deviations. [...]
arXiv:2210.15153; CERN-EP-2022-200; LHCb-PAPER-2022-018.- Geneva : CERN, 2023-08-14 - 12 p. - Published in : Phys. Rev. Lett. 131 (2023) 071901 Fulltext: LHCb-PAPER-2022-018 - PDF; 2210.15153 - PDF; Publication - PDF; Related data file(s): ZIP;
9.
Search for the baryon- and lepton-number violating decays B0pμ and B0spμ / LHCb Collaboration
A search for the baryon- and lepton-number violating decays B0pμ and B0spμ is performed at the LHCb experiment using data collected in proton-proton collisions at s = 7, 8 and 13 TeV, corresponding to integrated luminosities of 1, 2 and 6 fb1, respectively. No significant signal for B0pμ and B0spμ decays is found and the upper limits on the branching fractions are determined to be B(B0pμ)<2.6(3.1)×109 and B(B0spμ)<12.1(14.0)×109, respectively, at 90% (95%) confidence level. [...]
arXiv:2210.10412; CERN-EP-2022-195; LHCb-PAPER-2022-022.- Geneva : CERN, 2023-07-01 - 15 p. - Published in : Phys. Rev. D 108 (2023) 012021 Fulltext: Publication - PDF; 2210.10412 - PDF; Related data file(s): ZIP;
10.
Measurement of the CKM angle γ with B±D[Kπ±π±π]h± decays using a binned phase-space approach / LHCb Collaboration
The CKM angle γ is determined from CP-violating observables measured in B±D[Kπ±π±π]h±, (h=K,π) decays, where the measurements are performed in bins of the decay phase-space of the D meson. Using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7,8 and 13TeV, corresponding to a total integrated luminosity of 9fb1, γ is determined to be γ=(54.8+6.05.8+0.60.6+6.74.3), where the first uncertainty is statistical, the second systematic and the third from the external inputs on the coherence factors and strong phases of the D-meson decays..
arXiv:2209.03692; LHCb-PAPER-2022-017; CERN-EP-2022-150.- Geneva : CERN, 2023-07-17 - Published in : JHEP 2307 (2023) 138 Fulltext: 2209.03692 - PDF; LHCb-PAPER-2022-017 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;

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