CERN Accelerating science

CERN Document Server 420 záznamov nájdených  1 - 10ďalšíkoniec  skoč na záznam: Hľadanie trvalo 1.30 sekúnd. 
1.
Search for Darkonium in e+ee+e Collisions / BABAR Collaboration
Collider searches for dark sectors, new particles interacting only feebly with ordinary matter, have largely focused on identifying signatures of new mediators, leaving much of dark sector structures unexplored. In particular, the existence of dark matter bound states (darkonia) remains to be investigated. [...]
arXiv:2106.08529; BABAR-PUB-21/002; SLAC-PUB-17608.- 2022-01-11 - 10 p. - Published in : Phys. Rev. Lett. 128 (2022) 021802 Fulltext: PDF;
2.
Measurement of ψ(2S)ψ(2S) production cross-sections in proton-proton collisions at s=7s=7 and 13 TeV / LHCb Collaboration
The cross-sections of ψ(2S)ψ(2S) meson production in proton-proton collisions at s=13 TeVs=13 TeV are measured with a data sample collected by the LHCb detector corresponding to an integrated luminosity of 275 pb1275 pb1. The production cross-sections for prompt ψ(2S)ψ(2S) mesons and those for ψ(2S)ψ(2S) mesons from bb-hadron decays (ψ(2S)frombψ(2S)fromb) are determined as functions of the transverse momentum, pTpT, and the rapidity, yy, of the ψ(2S)ψ(2S) meson in the kinematic range 2<pT<20 GeV/c2<pT<20 GeV/c and 2.0<y<4.52.0<y<4.5. [...]
arXiv:1908.03099; CERN-EP-2019-150; LHCb-PAPER-2018-049.- Geneva : CERN, 2020-02-28 - 23 p. - Published in : Eur. Phys. J. C 80 (2020) 185 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
3.
Amplitude analysis of B±π±K+KB±π±K+K decays / LHCb Collaboration
The first amplitude analysis of the B±π±K+KB±π±K+K decay is reported based on a data sample corresponding to an integrated luminosity of 3.0 fb11 of pppp collisions recorded in 2011 and 2012 with the LHCb detector. The data is found to be best described by a coherent sum of five resonant structures plus a nonresonant component and a contribution from ππKKππKK SS-wave rescattering. [...]
arXiv:1905.09244; LHCb-PAPER-2018-051; CERN-EP-2019-062; LHCB-PAPER-2018-051.- Geneva : CERN, 2019-12-07 - 11 p. - Published in : Phys. Rev. Lett. 123 (2019) 231802 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP; Supplementary information: ZIP;
4.
Measurements of CPCP asymmetries in charmless four-body Λ0bΛ0b and Ξ0bΞ0b decays / LHCb Collaboration
A search for CPCP violation in charmless four-body decays of Λ0bΛ0b and Ξ0bΞ0b baryons with a proton and three charged mesons in the final state is performed. To cancel out production and detection charge-asymmetry effects, the search is carried out by measuring the difference between the CPCP asymmetries in a charmless decay and in a decay with an intermediate charmed baryon with the same particles in the final state. [...]
arXiv:1903.06792; LHCb-PAPER-2018-044; CERN-EP-2019-13; LHCb-PAPER-2018-044 and CERN-EP-2019-13; LHCB-PAPER-2018-044.- 2019-09-07 - 30 p. - Published in : Eur. Phys. J. C Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
5.
Amplitude analysis of B0sK0SK±πB0sK0SK±π decays / LHCb Collaboration
The first untagged decay-time-integrated amplitude analysis of B0sK0SK±πB0sK0SK±π decays is performed using a sample corresponding to 3.03.0fb11 of pppp collision data recorded with the LHCb detector during 2011 and 2012. The data are described with an amplitude model that contains contributions from the intermediate resonances K(892)0,+K(892)0,+, K2(1430)0,+K2(1430)0,+ and K0(1430)0,+K0(1430)0,+, and their charge conjugates. [...]
arXiv:1902.07955; LHCb-PAPER-2018-045; CERN-EP-2019-017; LHCB-PAPER-2018-045.- Geneva : CERN, 2019-06-21 - 27 p. - Published in : JHEP 1906 (2019) 114 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
6.
Measurement of bb-hadron fractions in 13 TeV pppp collisions / LHCb Collaboration
The production fractions of ¯B0s¯¯¯¯B0s and Λ0bΛ0b hadrons, normalized to the sum of BB and ¯B0¯¯¯¯B0 fractions, are measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity of 1.67fb11. These ratios, averaged over the bb-hadron transverse momenta from 4 to 25 GeV and pseudorapidity from 2 to 5, are 0.122±0.0060.122±0.006 for ¯B0s¯¯¯¯B0s, and 0.259±0.0180.259±0.018 for Λ0bΛ0b, where the uncertainties arise from both statistical and systematic sources. [...]
arXiv:1902.06794; CERN-EP-2019-016; LHCb-PAPER-2018-050; LHCB-PAPER-2018-050.- 2019-08-29 - 11 p. - Published in : Phys. Rev. D 100 (2019) 031102 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
7.
Dalitz Plot analysis of the D+KK+K+D+KK+K+ decay / LHCb Collaboration
The resonant structure of the doubly Cabibbo-suppressed decay D+KK+K+D+KK+K+ is studied for the first time. The measurement is based on a sample of pppp-collision data, collected at a centre-of-mass energy of 8 TeV with the LHCb detector and corresponding to an integrated luminosity of 2 fb11. [...]
arXiv:1902.05884; LHCb-PAPER-2018-039; CERN-EP-2018-336.- Geneva : CERN, 2019-04-08 - 37 p. - Published in : JHEP 04 (2019) 063 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
8.
Measurement of B+B+, B0B0 and Λ0bΛ0b production in pPbpPb collisions at sNN=8.16 TeVsNN=8.16 TeV / LHCb Collaboration
The production of B+B+, B0B0 and Λ0bΛ0b hadrons is studied in proton-lead collisions at a centre-of-mass energy per nucleon pair of sNN=8.16TeVsNN=8.16TeV recorded with the LHCb detector at the LHC. The measurement uses a dataset corresponding to an integrated luminosity of 12.2±0.3 nb112.2±0.3 nb1 for the case where the proton beam is projected into the LHCb detector (corresponding to measuring hadron production at positive rapidity) and 18.6±0.5 nb118.6±0.5 nb1 for the lead beam projected into the LHCb detector (corresponding to measuring hadron production at negative rapidity). [...]
arXiv:1902.05599; LHCb-PAPER-2018-048; CERN-EP-2019-010; LHCb-PAPER-2018-048; CERN-EP-2019-010.- Geneva : CERN, 2019-03-28 - 21 p. - Published in : Phys. Rev. D 99 (2019) 052011 Article from SCOAP3: PDF; Fulltext: PDF; Related data file(s): ZIP;
9.
Measurement of the ratio of branching fractions of the decays Λ0bψ(2S)ΛΛ0bψ(2S)Λ and Λ0bJ/ψΛΛ0bJ/ψΛ / LHCb Collaboration
Using pppp collisions corresponding to 3fb1fb1 integrated luminosity, recorded by the LHCb experiment at centre-of-mass energies of 7 and 8TeVTeV, the ratio of branching fractions B(Λ0bψ(2S)Λ)/B(Λ0bJ/ψΛ)=0.513±0.023(stat)±0.016(syst)±0.011(B)B(Λ0bψ(2S)Λ)/B(Λ0bJ/ψΛ)=0.513±0.023(stat)±0.016(syst)±0.011(B) is determined. The first uncertainty is statistical, the second is systematic and the third is due to the external branching fractions used..
arXiv:1902.02092; LHCb-PAPER-2017-041; CERN-EP-2019-003.- Geneva : CERN, 2019-03-22 - 16 p. - Published in : JHEP 03 (2019) 126 Article from SCOAP3: PDF; Fulltext: LHCb-Paper-2017-041 - PDF; 1902.02092 - PDF; Related data file(s): ZIP;
10.
Observation of the doubly Cabibbo-suppressed decay Ξ+cpϕΞ+cpϕ / LHCb Collaboration
The doubly Cabibbo-suppressed decay Ξ+cpϕΞ+cpϕ with ϕK+KϕK+K is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb11 recorded with the LHCb detector in pppp collisions at a centre-of-mass energy of 8 TeV. [...]
arXiv:1901.06222; LHCb-PAPER-2018-040; CERN-EP-2018-349.- 2019-04-10 - 17 p. - Published in : JHEP 04 (2019) 084 Article from SCOAP3: PDF; Fulltext: PDF;

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