Measurements of Σ+ and Σ time-like electromagnetic form factors for center-of-mass energies from 2.3864 to 3.0200 GeV

The BESIII Collaboration

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

4 Цитирования (Scopus)

Аннотация

The Born cross sections of the e+e→Σ+Σ¯ and e+e→ΣΣ¯+ processes are determined for center-of-mass energy from 2.3864 to 3.0200 GeV with the BESIII detector. The cross section lineshapes can be described properly by a pQCD function and the resulting ratio of effective form factors for the Σ+ and Σ is consistent with 3. In addition, ratios of the Σ+ electric and magnetic form factors, |GE/GM|, are obtained at three center-of-mass energies through an analysis of the angular distributions. These measurements, which are studied for the first time in the off-resonance region, provide precision experimental input for understanding baryonic structure. The observed new features of the Σ± form factors require more theoretical discussions for the hyperons.

Язык оригиналаанглийский
Номер статьи136110
ЖурналPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Том814
DOI
СостояниеОпубликовано - 10 мар 2021

Предметные области OECD FOS+WOS

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

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