TY  - SER
AU  - Ablikim,M.
AU  - Ai,X.C.
AU  - Chelkov,G.A.
AU  - Achasov,M.N.
TI  - Confirmation of a charged charmoniumlike state Zc (3885)∓ in e+e− → π± (DD¯*)∓  with double D tag
KW  - BESIII, детектор
KW  - BEPCII, коллайдер
KW  - статьи в журналах
N1  - Библиогр.: 43 назв
N2  - We present a study of the process e+e-→π±(DD¯*)∓ using data samples of 1092  pb-1 at s=4.23  GeV and 826  pb-1 at s=4.26  GeV collected with the BESIII detector at the BEPCII storage ring. With full reconstruction of the D meson pair and the bachelor π± in the final state, we confirm the existence of the charged structure Zc(3885)∓ in the (DD¯*)∓ system in the two isospin processes e+e-→π+D0D*- and e+e-→π+D-D*0. By performing a simultaneous fit, the statistical significance of Zc(3885)∓ signal is determined to be greater than 10σ, and its pole mass and width are measured to be Mpole=(3881.7±1.6(stat)±1.6(syst))  MeV/c2 and Γpole=(26.6±2.0(stat)±2.1(syst))  MeV, respectively. The Born cross section times the (DD¯*)∓ branching fraction (σ(e+e-→π±Zc(3885)∓)×Br(Zc(3885)∓→(DD¯*)∓)) is measured to be (141.6±7.9(stat)±12.3(syst))  pb at s=4.23  GeV and (108.4±6.9(stat)±8.8(syst))  pb at s=4.26  GeV. The polar angular distribution of the π±-Zc(3885)∓ system is consistent with the expectation of a quantum number assignment of JP=1+ for Zc(3885)∓
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000579658
ER  -