Observation of a neutral charmoniumlike state Zc(4025)0 in e+e- → (D*D¯*)0π0 M. Ablikim, M. N. Achasov, X. C. Ai [et.al.]
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ArticleSubject(s): BESIII, детектор | BEPCII, коллайдер | столкновение частиц | чармонийGenre/Form: статьи в журналах Online resources: Click here to access online
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Physical Review Letters Vol. 115, № 18. P. 182002 (1-7)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.
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.
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