Электронный каталог

Статья

Aaij, R.
First Observation of the *L*0&sub(b) *> *L*+&sub(c)D*-&sub(S)K*+K*- Decay and Search for Pentaquarks in the *L*+&sub(c)D*-&sub(c) System / R.Aaij, K.Ivshin, A.Solovev, [LHCb Collab.]. – Text : electronic // Physical Review D. – 2025. – Vol. 112, No. 5. – P. 052013. – URL: https://doi.org/10.1103/b28d-z2xc. – Bibliogr.: 62.

The Λ*0&sub(b) → Λ*+&sub(c)D*−&sub(s)K*+K*− decay is observed for the first time using the data sample from proton-proton collisions recorded at a center-of-mass energy of 13 TeV with the LHCb detector, corresponding to an integrated luminosity of 6 fb&sup(−1). The ratio of branching fraction to that of Λ*0&sub(b) →Λ*+&sub(c)D*−&sub(s) decays is measured as 0.0141 *( 0.0019 *( 0.0012, where the first uncertainty is statistical and the second systematic. A search for hidden-charm pentaquarks with strangeness is performed in the Λ*+&sub(c)D*−&sub(s) system. No evidence is found, and upper limits on the production ratio of P&sub(cc^-s(4338)*0 and P&sub(cc^-s)(4459)*0 pentaquarks relative to the Λ*+&sub(c)D*−&sub(s) final state are set at the 95% confidence level as 0.12 and 0.20, respectively



ОИЯИ = ОИЯИ (JINR)2025