Электронный каталог

Статья

Ablikim, M.
Coupled-Channel Analysis of the *c&sub(c1)(3872) Line Shape with BESIII Data / M.Ablikim, O.Bakina, I.Boyko, G.Chelkov, D.Dedovich, I.Denysenko, P.Egorov, A.Guskov, Y.Nefedov, S.Pogodin, A.Sarantsev, A.Zhemchugov, [a.o.] // Physical Review Letters [Electronic resource]. – 2024. – Vol. 132, No. 15. – P. 151903. – URL: https://doi.org/10.1103/PhysRevLett.132.151903. – Bibliogr.: 35.

We perform a study of the χc1(3872) line shape using the data samples of eþe− → γχc1(3872), χc1(3872) → D0 ¯D0π0, and π**π−J=ψ collected with the BESIII detector. The effects of the coupled channels and the off-shell D*0 are included in the parametrization of the line shape. The line shape mass parameter is obtained to be M &sub(x)=(3871.63 *( 0.13&sup(0.06)&sub(−0.05) MeV. Two poles are found on the first and second Riemann sheets corresponding to the D*0D^-*0 branch cut. The pole location on the first sheet is much closer to the D*0D^-*0 threshold than the other, and is determined to be 7.04*(0.15&sub(+0.07)&sub(−0.08) MeV above the D*0D^-*0π*0 threshold with an imaginary part −0.19*( 0.08&sup(+0.14)&sub(-0.19) MeV −0.19 MeV.



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