Data di Pubblicazione:
2015
Abstract:
We report a study of the process e+e−→(D∗D¯∗)0π0 using e+e− collision data samples with integrated luminosities 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. We observe a new neutral structure near the (D∗D¯∗)0 mass threshold in the π0 recoil mass spectrum, which we denote as Zc(4025)0. Assuming a Breit-Wigner line shape, its pole mass and pole width are determined to be (4025.5+2.0−4.7±3.1) MeV/c2 and (23.0±6.0±1.0) MeV, respectively. The Born cross sections of e+e−→Zc(4025)0π0→(D∗D¯∗)0π0 are measured to be (61.6±8.2±9.0) pb at s√=4.23 GeV and (43.4±8.0±5.4) pb at s√=4.26 GeV. The first uncertainties are statistical and the second are systematic.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Physics and Astronomy (all)
Elenco autori:
Marcello, S.; Maggiora, M.; Destefanis, M.; Spataro, S.; Sosio, S; Amoroso, A.; De Mori, F.; Greco, M.; Bianchi, F.
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