Электронный каталог

Статья

Ablikim, M.
Search for the Decay *c&sub(c1)(3872) *> *p*+*p*-*c&sub(c1) / M.Ablikim, O.Bakina, I.Boyko, G.Chelkov, D.Dedovich, I.Denysenko, P.Egorov, A.Guskov, Y.Nefedov, A.Sarantsev, A.Zhemchugov, [a.o.] // Physical Review D [Electronic resource]. – 2024. – Vol. 109, No. 7. – P. L071101. – URL: https://doi.org/10.1103/PhysRevD.109.L071101. – Bibliogr.: 41.

Using a data sample corresponding to an integrated luminosity of 10.9 fb−1 collected at center-of-mass energies from 4.16 to 4.34 GeV with the BESIII detector, we search for the decay *с&sub(c1)(3872) → π*+π*−*c&sub(c1) in the radiative production e*+e*− → γ*c&sub(c1)(3872). No significant signal is observed, and the ratio for the branching fraction of *c&sub(c1)(3872) → π*+π*−*c&sub(c1) to *c&sub(c1)(3872) → π*+π*−J=ψ is measured as R ≡ B[*c&sub(c1)(3872)→π*+π*−*c&sub(c1)] B[*c&sub(c1)(3872)→π*+π*−J/ψ] < 0.18 at 90% confidence level. An upper limit on the product of the cross section σ[e*+e*− → γ*c&sub(c1)(3872)] and the branching fraction B[*c&sub(c1)(3872) → π*+π*−*c&sub(c1) at each center-of-mass energy is also given. These measurements favor the nonconventional charmonium nature of the *c&sub(c1)(3872) state.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 332.7 - Встречные е+е- и мю+мю- пучки