Электронный каталог

Статья

Aaij, R.
Measurement of the *W*0&sub(c) and *X*0&sub(c) Baryon Lifetimes Using Hadronic b-Baryon Decays / R.Aaij, K.Ivshin, A.Solovev, [LHCb Collab.]. – Text : electronic // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 9. – P. 157. – URL: https://doi.org/10.1007/JHEP09(2025)157. – Bibliogr.: 63.

The lifetimes of the Ω*0&sub(c) and Ξ*0&sub(c) baryons are measured using a pp collision dataset collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb&sup(−1). The charm baryons are produced in the fully reconstructed decay chains Ω*−&sub(b) → Ω*0&*sub(c)(→pK*−K*−π*+)π*− and Ξ*−&sub(b) → Ξ*0&sub(c)(→pK*−K*−π*+)π*−. The measurement uses topologically and kinematically similar B*− → D*0(→ K*−K*+π*−π*+)π*− decays for normalisation. The measured lifetimes are τ&sub(Ω*0&sub(c)) = 276.3 ± 19.4 (stat) ± 1.8 (syst) ± 0.7 (τ&sub(D*0)fs, τ&sub(Ξ*0&sub(c))= 149.2 ± 2.5 (stat) ± 0.9 (syst) ± 0.4 (τ&sub(D*0))fs, where the frst uncertainty is statistical, the second systematic and the third due to the uncertainty of the D*0 lifetime. These results are consistent with previous measurements performed by the LHCb experiment.



ОИЯИ = ОИЯИ (JINR)2025