Amplitude analysis of the χc1 →ηπ+π- decays

The BELLE collaboration

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Using 448.0×106 ψ(3686) events collected with the BESIII detector, an amplitude analysis is performed for ψ(3686)→γχc1, χc1→ηπ+π- decays. The most dominant two-body structure observed is a0(980)±π+; a0(980)±→ηπ±. The a0(980) line shape is modeled using a dispersion relation, and a significant nonzero a0(980) coupling to the η′π channel is measured. We observe χc1→a2(1700)π production for the first time, with a significance larger than 17σ. The production of mesons with exotic quantum numbers, JPC=1-+, is investigated, and upper limits for the branching fractions χc1→π1(1400)±π+, χc1→π1(1600)±π+, and χc1→π1(2015)±π+, with subsequent π1(X)±→ηπ± decay, are determined.

Original languageEnglish
Article number032002
Number of pages14
JournalPhysical Review D
Volume95
Issue number3
DOIs
Publication statusPublished - 13 Feb 2017

Keywords

  • EXOTIC MESON
  • PI-ETA
  • PI(0)PI(0)ETA
  • SYSTEM
  • GEV/C

Fingerprint

Dive into the research topics of 'Amplitude analysis of the χc1 →ηπ+π- decays'. Together they form a unique fingerprint.

Cite this