Observation of a resonant structure in e+e → ωη and another in e+e → ωπ0 at center-of-mass energies between 2.00 and 3.08 GeV

The BESIII Collaboration

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

8 Цитирования (Scopus)

Аннотация

Born cross sections for the processes e+e→ωη and e+e→ωπ0 have been determined for center-of-mass energies between 2.00 and 3.08 GeV with the BESIII detector at the BEPCII collider. The results obtained in this work are consistent with previous measurements but with improved precision. Two resonant structures are observed. In the e+e→ωη cross sections, a resonance with a mass of (2176±24±3)MeV/c2 and a width of (89±50±5)MeV is observed with a significance of 6.2σ. Its properties are consistent with the ϕ(2170). In the e+e→ωπ0 cross sections, a resonance denoted Y(2040) is observed with a significance of more than 10σ. Its mass and width are determined to be (2034±13±9)MeV/c2 and (234±30±25)MeV, respectively, where the first uncertainties are statistical and the second ones are systematic.

Язык оригиналаанглийский
Номер статьи136059
ЖурналPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Том813
DOI
СостояниеОпубликовано - 10 февр. 2021

Предметные области OECD FOS+WOS

  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ
  • 1.03.BU АСТРОНОМИЯ И АСТРОФИЗИКА

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