Details

Autor(en) / Beteiligte

• Achasov, M N
• Aliberti, R
• Amoroso, A
• Cetin, S A
• Chen, D Y
• Chen, Z J
• Cossio, F
• Dong, M Y
• Fang, S S
• Fang, Y
• Fava, L
• Feldbauer, F
• Fritsch, M
• Fu, C D
• Fu, Y
• Gu, M H
• Guo, Y P
• Han, T T
• Heinsius, F H
• Herold, C
• Huang, Y P
• Huesken, N
• Hussain, T
• Imoehl, W
• Ji, X L
• Kappert, R
• Ke, B C
• Koch, L
• Lenz, T
• Li, H B
• Li, L K
• Lin, C X
• Liu, C X
• Liu, H M
• Liu, K Y
• Liu, T
• Liu, X
• Liu, Z Q
• Lyu, X R
• Ma, F C
• Ma, X N
• Maas, F E
• Mao, Y J
• Meng, Z X
• Mitchell, R E
• Mo, X H
• Mo, Y J
• Nefedov, Y
• Nerling, F
• Ouyang, Q
• Pan, X
• Peng, H P
• Qi, H R
• Qiu, J F
• Rong, G
• Shen, X Y
• Shi, X D
• Spataro, S
• Sun, G X
• Sun, J F
• Sun, S S
• Sun, T
• Wang, C W
• Wang, H P
• Wang, K
• Wang, X
• Wang, X F
• Wang, Y Q
• Wang, Z Y
• Wei, D H
• White, D J
• Wu, L J
• Xiao, Y J
• Xu, G F
• Xu, J J
• Yan, L
• Yan, W C
• Yang, H J
• Yang, R X
• Yang, S L
• Yang, Yifan
• You, Z Y
• Yu, C X
• Yu, G
• Yu, J S
• Yuncu, A
• Zafar, A A
• Zhang, J J
• Zhang, J W
• Zhang, Jiawei
• Zhang, Y H
• Zhang, Y T
• Zhang, Z Y
• Zhao, Lei
• Zhao, Ling
• Zhao, Y B
• Zheng, Y
• Zheng, Y H
• Zhu, A N
• Zhu, Z A

Titel

Observation of a Near-Threshold Structure in the K^{+} Recoil-Mass Spectra in e^{+}e^{-}→K^{+}(D_{s}^{-}D^{0}+D_{s}^{-}D^{0})

Ist Teil von

• Physical review letters, 2021-03, Vol.126 (10), p.102001-102001, Article 102001

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We report a study of the processes of e^{+}e^{-}→K^{+}D_{s}^{-}D^{*0} and K^{+}D_{s}^{*-}D^{0} based on e^{+}e^{-} annihilation samples collected with the BESIII detector operating at BEPCII at five center-of-mass energies ranging from 4.628 to 4.698 GeV with a total integrated luminosity of 3.7  fb^{-1}. An excess of events over the known contributions of the conventional charmed mesons is observed near the D_{s}^{-}D^{*0} and D_{s}^{*-}D^{0} mass thresholds in the K^{+} recoil-mass spectrum for events collected at sqrt[s]=4.681  GeV. The structure matches a mass-dependent-width Breit-Wigner line shape, whose pole mass and width are determined as (3982.5_{-2.6}^{+1.8}±2.1)  MeV/c^{2} and (12.8_{-4.4}^{+5.3}±3.0)  MeV, respectively. The first uncertainties are statistical and the second are systematic. The significance of the resonance hypothesis is estimated to be 5.3  σ over the contributions only from the conventional charmed mesons. This is the first candidate for a charged hidden-charm tetraquark with strangeness, decaying into D_{s}^{-}D^{*0} and D_{s}^{*-}D^{0}. However, the properties of the excess need further exploration with more statistics.