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SUMMARY:A study of the pentaquark states
DTSTART;VALUE=DATE-TIME:20190701T045000Z
DTEND;VALUE=DATE-TIME:20190701T052000Z
DTSTAMP;VALUE=DATE-TIME:20260517T094455Z
UID:indico-contribution-31@indico.itp.ac.cn
DESCRIPTION:Speakers: 肖 楮文 (Central South Univesity)\nThe LHCb colla
 boration has reported recently three pentaquark states found in the J/ψN 
 mass distribution. Based on the constraints of the heavy quark spin symmet
 ry combined with the local hidden gauge symmetry\, we investigate the D(
 ∗)Σ(∗) interactions\, together with J/ψN and other coupled channels\
 , using a coupled channel approach. From the poles found in the second Rie
 mann sheets\, we dynamically reproduce the three states identified with th
 e masses and the widths. Thus\, we determine their quantum numbers and app
 roximate molecular structure as 1/2− D ̄Σc\, 1/2− D ̄∗Σc\, and 3
 /2− D ̄∗Σc\, and isospin I = 1/2. In our research procedure\, we als
 o predict some other states: (1) one 3/2− D ̄Σ∗c state with the mass
  of around 4374 MeV\, for which indications appear in the experimental spe
 ctrum\; (2) two other near degenerate states of 1/2− D ̄∗Σ∗c and 3
 /2− D ̄∗Σ∗c\, found around 4520 MeV\; (3) a 5/2− D ̄∗Σ∗c s
 tate\, appeared at the same energy. Our findings also serve as a guide for
  further experimental studies.\n\nhttps://indico.itp.ac.cn/event/1/contrib
 utions/31/
LOCATION:新疆乌鲁木齐金谷大酒店 三楼会议室
URL:https://indico.itp.ac.cn/event/1/contributions/31/
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