CERN Accelerating science

CERN Document Server 174 Datensätze gefunden  1 - 10nächsteEnde  gehen zum Datensatz: Die Suche hat 0.65 Sekunden gedauert. 
1.
Pulsar Nulling and Vacuum Radio Emission from Axion Clouds / Caputo, Andrea (CERN) ; Witte, Samuel J. (Oxford U., Theor. Phys. ; ICC, Barcelona U.) ; Philippov, Alexander A. (Maryland U.) ; Jacobson, Ted (Maryland U.)
Non-relativistic axions can be efficiently produced in in the polar caps of pulsars, resulting in the formation of a dense cloud of gravitationally bound axions. Here, we investigate the interplay between such an axion cloud and the electrodynamics in the pulsar magnetosphere, focusing specifically on the dynamics in the polar caps, where the impact of the axion cloud is expected to be most pronounced. [...]
arXiv:2311.14795.- 2024-10-17 - 8 p. - Published in : Phys. Rev. Lett. 133 (2024) 161001 Fulltext: 2311.14795 - PDF; Publication - PDF;
2.
Observation and branching fraction measurement of the decay ΞbΛ0bπ / LHCb Collaboration
The decay ΞbΛ0bπ is observed using a proton-proton collision data sample collected at center-of-mass energy s=13 TeV with the LHCb detector, corresponding to an integrated luminosity of 5.5 fb1. This process is mediated by the suˉud quark-level transition, where the b quark in the Ξb baryon is a spectator in the decay. [...]
arXiv:2307.09427; LHCb-PAPER-2023-015; CERN-EP-2023-116; LHCB-PAPER-2023-015.- Geneva : CERN, 2023-10-01 - 16 p. - Published in : Phys. Rev. D 108 (2023) 072002 Fulltext: 2307.09427 - PDF; Publication - PDF; Xib2LbPi_2023_14Aug2023 - PDF; External link: Previous draft version
3.
Measurement of the Z boson production cross-section in pp collisions at s=5.02 TeV / LHCb Collaboration
The first measurement of the Z boson production cross-section at centre-of-mass energy s=5.02TeV in the forward region is reported, using pp collision data collected by the LHCb experiment in year 2017, corresponding to an integrated luminosity of 100±2pb1. The production cross-section is measured for final-state muons in the pseudorapidity range 2.0<η<4.5 with transverse momentum pT>20GeV/c. [...]
arXiv:2308.12940; LHCb-PAPER-2023-010; CERN-EP-2023-141; LHCB-PAPER-2023-010.- Geneva : CERN, 2024-02-13 - 38 p. - Published in : JHEP 2402 (2024) 070 Fulltext: 2308.12940 - PDF; LHCb-PAPER-2023-010 - PDF; Publication - PDF; Related data file(s): ZIP;
4.
Measurement of the CKM angle γ using the B±Dh± channels / LHCb Collaboration
A measurement of the CP-violating observables from B±DK± and B±Dπ± decays is presented, where D(D) is an admixture of D0 and ˉD0 (D0 and ˉD0) states and is reconstructed through the decay chains DDπ0/γ and DK0Sπ+π/K0SK+K. The measurement is performed by analysing the signal yield variation across the D decay phase space and is independent of any amplitude model. [...]
arXiv:2310.04277; LHCb-PAPER-2023-012; CERN-EP-2023-170.- Geneva : CERN, 2023-12-01 - 32 p. - Published in : JHEP 2312 (2023) 13 Fulltext: 2310.04277 - PDF; document - PDF; Publication - PDF; latex_B2Dsth_JHEP - PDF; Related data file(s): ZIP;
5.
Measurement of prompt D+ and D+s production in pPb collisions at sNN=5.02TeV / LHCb Collaboration
The production of prompt D+ and D+s mesons is studied in proton-lead collisions at a centre-of-mass energy of sNN=5.02TeV. The data sample corresponding to an integrated luminosity of (1.58±0.02)nb1 is collected by the LHCb experiment at the LHC. [...]
arXiv:2309.14206; CERN-EP-2023-142; LHCb-PAPER-2023-006.- 2024-01-15 - 45 p. - Published in : JHEP 2401 (2024) 070 Fulltext: document - PDF; 2309.14206 - PDF;
6.
Measurement of CP violation in B0ψ(+)K0S(π+π) decays / LHCb Collaboration
<--!html> A measurement of time-dependent CP violation in the decays of B0 and ¯B0 mesons to the final states J/ψ(μ+μ)K0S, ψ(2S)(μ+μ)K0S and J/ψ(e+e)K0S with K0Sπ+π is presented. The data correspond to an integrated luminosity of 6fb1 collected at a centre-of-mass energy of s=13TeV with the LHCb detector. [...]
arXiv:2309.09728; LHCb-PAPER-2023-013; CERN-EP-2023-177.- Geneva : CERN, 2024-01-08 - 12 p. - Published in : Phys. Rev. Lett. 132 (2024) 021801 Fulltext: 2309.09728 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
7.
Measurement of the CKM angle γ in the B0DK0 channel using self-conjugate DK0Sh+h decays / LHCb Collaboration
A model-independent study of CP violation in B0DK0 decays is presented using data corresponding to an integrated luminosity of 9fb1 collected by the LHCb experiment at centre-of-mass energies of s=7,8 and 13 TeV. The CKM angle γ is determined by examining the distributions of signal decays in phase-space bins of the self-conjugate DK0Sh+h decays, where h=π,K. [...]
arXiv:2309.05514; LHCb-PAPER-2023-009; CERN-EP-2023-138.- Geneva : CERN, 2024-02-29 - 29 p. - Published in : Eur. Phys. J. C 84 (2024) 206 Fulltext: document - PDF; 2309.05514 - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
8.
Observation of Cabibbo-suppressed two-body hadronic decays and precision mass measurement of the Ω0c baryon / LHCb Collaboration
The first observation of the singly Cabibbo-suppressed Ω0cΩK+ and Ω0cΞπ+ decays is reported, using proton-proton collision data at a center-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.4fb1, collected with the LHCb detector between 2016 and 2018. The branching fraction ratios are measured to be B(Ω0cΩK+)B(Ω0cΩπ+)=[6.08±0.51(stat)±0.40(syst)]%, B(Ω0cΞπ+)B(Ω0cΩπ+)=[15.81±0.87(stat)±0.44(syst)±0.16(ext)]%. [...]
arXiv:2308.08512; LHCb-PAPER-2023-011; CERN-EP-2023-155.- Geneva : CERN, 2024-02-23 - 18 p. - Published in : Phys. Rev. Lett. 132 (2024) 081802 Fulltext: 2308.08512 - PDF; LHCb-PAPER-2023-011(arXiv-2308.08512) - PDF; Publication - PDF; Related data file(s): ZIP;
9.
A search for rare BDμ+μ decays / LHCb Collaboration
A search for rare BDμ+μ decays is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb1. No significant signals are observed in the non-resonant μ+μ modes, and upper limits of B(B0¯D0μ+μ)<5.1×108, B(B+D+sμ+μ)<3.2×108, B(B0s¯D0μ+μ)<1.6×107 and fc/fuB(B+cD+sμ+μ)<9.6×108 are set at the 95 % confidence level, where fc and fu are the fragmentation fractions of a B meson with a c and u quark respectively in proton-proton collisions. [...]
arXiv:2308.06162; LHCb-PAPER-2022-048; CERN-EP-2023-121; LHCB-PAPER-2022-048.- Geneva : CERN, 2024-02-07 - 23 p. - Published in : JHEP 2402 (2024) 032 Fulltext: document - PDF; 2308.06162 - PDF; Related data file(s): ZIP;
10.
Λ+c polarimetry using the dominant hadronic mode / LHCb Collaboration
The polarimeter vector field for multibody decays of a spin-half baryon is introduced as a generalisation of the baryon asymmetry parameters. Using a recent amplitude analysis of the Λ+cpKπ+ decay performed at the LHCb experiment, we compute the distribution of the kinematic-dependent polarimeter vector for this process in the space of Mandelstam variables to express the polarised decay rate in a model-agnostic form. [...]
arXiv:2301.07010; LHCb-PAPER-2022-044; CERN-EP-2022-287.- Geneva : CERN, 2023-07-31 - 20 p. - Published in : JHEP 2307 (2023) 228 Fulltext: document - PDF; LHCb-PAPER-2022-044 - PDF; 2301.07010 - PDF; Related data file(s): ZIP;

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1 Philippov, A
4 Philippov, A A
3 Philippov, A V
6 Philippov, Alexander
6 Philippov, Alexander A
1 Philippov, Alexander A.
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