Observation of an Isoscalar Resonance with Exotic JPC=1-+ Quantum Numbers in J /ψ →γηη′

The BESIII Collaboration

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

2 Цитирования (Scopus)

Аннотация

Using a sample of (10.09±0.04)×109 J/ψ events collected with the BESIII detector operating at the BEPCII storage ring, a partial wave analysis of the decay J/ψ→γηη′ is performed. The first observation of an isoscalar state with exotic quantum numbers JPC=1-+, denoted as η1(1855), is reported in the process J/ψ→γη1(1855) with η1(1855)→ηη′. Its mass and width are measured to be (1855±9-1+6) MeV/c2 and (188±18-8+3) MeV, respectively, where the first uncertainties are statistical and the second are systematic, and its statistical significance is estimated to be larger than 19σ.

Язык оригиналаанглийский
Номер статьи192002
ЖурналPhysical Review Letters
Том129
Номер выпуска19
DOI
СостояниеОпубликовано - 4 нояб. 2022

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