CERN Accelerating science

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1.
Observation of exotic J/ψϕJ/ψϕ resonances in diffractive processes in proton-proton collisions / LHCb Collaboration
The first study of J/ψϕJ/ψϕ production in diffractive processes in proton-proton collisions is presented. [...]
arXiv:2407.14301 ; LHCb-PAPER-2023-043 ; CERN-EP-2024-149 ; LHCB-PAPER-2023-043.
- 2024 - 21.
Fulltext - Related data file(s) - Fulltext
2.
Probing the nature of the χc1(3872)χc1(3872) state using radiative decays / LHCb Collaboration
The radiative decays χc1(3872)ψ(2S)γχc1(3872)ψ(2S)γ and χc1(3872)J/ψγχc1(3872)J/ψγ are used to probe the nature of the χc1(3872)χc1(3872) state using proton-proton collision data collected with the LHCb detector, corresponding to an integrated luminosity of 9fb11. Using the B+χc1(3872)K+B+χc1(3872)K+ decay, the χc1(3872)ψ(2S)γχc1(3872)ψ(2S)γ process is observed for the~first time and the ratio of its partial width to that of the χc1(3872)J/ψγχc1(3872)J/ψγ decay is measured to be Γχc1(3872)ψ(2S)γΓχc1(3872)Jψγ=1.67±0.21±0.12±0.04,Γχc1(3872)ψ(2S)γΓχc1(3872)Jψγ=1.67±0.21±0.12±0.04, where the first uncertainty is statistical, the second systematic and the third is due to the uncertainties on the branching fractions of the ψ(2S)ψ(2S) and J/ψJ/ψ mesons. [...]
arXiv:2406.17006; LHCb-PAPER-2024-015; CERN-EP-2025-157; LHCB-PAPER-2024-015.- Geneva : CERN, 2024-11-21 - 33 p. - Published in : JHEP 2411 (2024) 121 Fulltext: 2406.17006 - PDF; document - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
3.
Long-lived particle reconstruction downstream of the LHCb magnet / LHCb Collaboration
Charged-particle trajectories are usually reconstructed with the LHCb detector using combined information from the tracking devices placed upstream and downstream of the 4 T m dipole magnet. [...]
arXiv:2211.10920 ; LHCb-DP-2022-001 ; CERN-LHCb-DP-2022-001.
- 45.
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4.
Amplitude analysis of B+ψ(2S)K+π+πB+ψ(2S)K+π+π decays / Aaij, Roel (Nikhef, Amsterdam) ; Abdelmotteleb, Ahmed Sameh Wagih (Warwick U.) ; Abellan Beteta, Carlos (Zurich U.) ; Abudinén, Fernando Jesus (Warwick U.) ; Ackernley, Thomas (Liverpool U.) ; Adefisoye, Ayomide Matthew (Syracuse U.) ; Adeva, Bernardo (U. Santiago de Compostela (main)) ; Adinolfi, Marco (Bristol U.) ; Adlarson, Patrik Harri ; Agapopoulou, Christina (IJCLab, Orsay) et al.
The first full amplitude analysis of B+ψ(2S)K+π+πB+ψ(2S)K+π+π decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9fb19fb1 recorded with the LHCb detector. [...]
arXiv:2407.12475 ; LHCb-PAPER-2024-014 ; CERN-EP-2024-177 ; LHCB-PAPER-2024-014.
- 2024 - 69.
Fulltext - Related data file(s) - Fulltext
5.
Improved measurement of CPCP violation parameters in B0sJ/ψK+KB0sJ/ψK+K decays in the vicinity of the ϕ(1020)ϕ(1020) resonance / LHCb Collaboration
The decay-time-dependent CPCP asymmetry in B0sJ/ψ(μ+μ)K+KB0sJ/ψ(μ+μ)K+K decays is measured using proton-proton collision data, corresponding to an integrated luminosity of 6fb16fb1, collected with the LHCb detector at a center-of-mass energy of 13 TeV. Using a sample of approximately 349 000 B0sB0s signal decays with an invariant K+KK+K mass in the vicinity of the ϕ(1020)ϕ(1020) resonance, the CPCP-violating phase ϕsϕs is measured, along with the difference in decay widths of the light and heavy mass eigenstates of the B0sB0s-¯B0s¯¯¯¯B0s system, ΔΓsΔΓs, and the difference of the average B0sB0s and B0B0 meson decay widths, ΓsΓdΓsΓd. [...]
arXiv:2308.01468; LHCb-PAPER-2023-016; CERN-EP-2023-145; CERN-EP-2023-145 CERN-EP-2023-145; LHCb-PAPER-2023-016.- Geneva : CERN, 2024-02-02 - 12 p. - Published in : Phys. Rev. Lett. 132 (2024) 051802 Fulltext: 2308.01468 - PDF; LHCb-PAPER-2023-016 - PDF; Publication - PDF; Related data file(s): ZIP; Supplementary information: ZIP;
6.
Measurement of D0¯D0D0¯¯¯¯¯D0 mixing parameters and search for CPCP violation using D0K+πD0K+π decays / LHCb Collaboration
A measurement of the time-dependent ratio of the D0K+πD0K+π to ¯D0K+π¯¯¯¯¯D0K+π decay rates is reported. [...]
arXiv:2407.18001 ; LHCb-PAPER-2024-008 ; CERN-EP-2024-178 ; LHCB-PAPER-2024-008.
- 2024 - 43.
Fulltext - Related data file(s) - Fulltext - Suppelementary information
7.
Measurement of the branching fraction ratios R(D+)R(D+) and R(D+)R(D+) using muonic ττ decays / LHCb Collaboration
The branching fraction ratios of ¯B0D+τ¯ντ¯¯¯B0D+τ¯¯¯ντ and ¯B0D+τ¯ντ¯¯¯B0D+τ¯¯¯ντ decays are measured with respect to their muonic counterparts, using a data sample corresponding to an integrated luminosity of 2.0 fb11 collected by the LHCb experiment in proton-proton collisions at s=13TeVs=13TeV. [...]
arXiv:2406.03387 ; LHCb-PAPER-2024-007 ; CERN-EP-2024-125 ; LHCB-PAPER-2024-007.
- 2024 - 22.
Fulltext - Related data file(s) - Supplementary information - Fulltext
8.
Measurement of prompt D+D+ and D+sD+s production in pPbpPb collisions at sNN=5.02sNN=5.02TeV / LHCb Collaboration
The production of prompt D+D+ and D+sD+s mesons is studied in proton-lead collisions at a centre-of-mass energy of sNN=5.02sNN=5.02TeV. The data sample corresponding to an integrated luminosity of (1.58±0.02)nb1(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;
9.
Precision Measurement of <math display="inline"><mrow><mi>C</mi><mi>P</mi></mrow></math> Violation in the Penguin-Mediated Decay <math display="inline"><mrow><msubsup><mrow><mi>B</mi></mrow><mrow><mi>s</mi></mrow><mrow><mn>0</mn></mrow></msubsup><mo stretchy="false">→</mo><mi>ϕ</mi><mi>ϕ</mi></mrow></math> / LHCb Collaboration
A flavor-tagged time-dependent angular analysis of the decay B0sϕϕB0sϕϕ is performed using pppp collision data collected by the LHCb experiment at the center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6fb11. The CP-violating phase and direct CP-violation parameter are measured to be ϕsˉsss=0.042±0.075±0.009ϕs¯sss=0.042±0.075±0.009 rad and |λ|=1.004±0.030±0.009|λ|=1.004±0.030±0.009, respectively, assuming the same values for all polarization states of the ϕϕϕϕ system. [...]
arXiv:2304.06198; LHCb-PAPER-2023-001; CERN-EP-2023-042.- Geneva : CERN, 2023-10-23 - 12 p. - Published in : Phys. Rev. Lett. 131 (2023) 171802 Fulltext: LHCb-PAPER-2023-001 - PDF; Publication - PDF; 2304.06198 - PDF; Related data file(s): ZIP;
10.
Study of the BΛ+cˉΛcKBΛ+c¯ΛcK decay / LHCb Collaboration
The decay BΛ+cˉΛcKBΛ+c¯ΛcK is studied in proton-proton collisions at a center-of-mass energy of s=13s=13 TeV using data corresponding to an integrated luminosity of 5 fb1fb1 collected by the LHCb experiment. In the Λ+cKΛ+cK system, the Ξc(2930)0Ξc(2930)0 state observed at the BaBar and Belle experiments is resolved into two narrower states, Ξc(2923)0Ξc(2923)0 and Ξc(2939)0Ξc(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,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;

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