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Title: Amplitude Analysis of the Decays η ' π + π - π 0 and η ' π 0 π 0 π 0

Journal Article · · Physical Review Letters
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Based on a sample of 1.31 × 109J / ψ events collected with the BESIII detector, an amplitude analysis of the isospin-violating decays η'→ π + π - π 0 and η' → π 0 π 0 π 0 is performed. A significant P-wave contribution from η'→ ρ ± π is observed for the first time in η' → π + π - π 0 . The branching fraction is determined to be B ( η'→ ρ ± π ) = ( 7.44 ± 0.60 ± 1.26 ± 1.84 ) × 10-4, where the first uncertainty is statistical, the second systematic, and the third model dependent. In addition to the nonresonant S -wave component, there is a significant σ meson component. The branching fractions of the combined S -wave components are determined to be B ( η' → π + π - π 0 ) S = ( 37.63 ± 0.77 ± 2.22 ± 4.48 ) × 10-4 and B ( η' → π 0 π 0 π 0 ) = ( 35.22 ± 0.82 ± 2.54 ) × 10-4, respectively. Finally, the latter one is consistent with previous BESIII measurements.

Research Organization:
Carnegie Mellon Univ., Pittsburgh, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); National Research Foundation of Korea (NRF); National Natural Science Foundation of China (NSFC); Youth Science Foundation of China; German Research Foundation (DFG)
Contributing Organization:
BESIII Collaboration
Grant/Contract Number:
SC0010118; FG02-94ER40823; FG02-04ER41291; FG02-05ER41374; R32-2008-000-10155-0; 11675184; 11125525; 11235011; 11322544; 11335008; 11425524; 11179007; U1232201; U1332201
OSTI ID:
1424037
Alternate ID(s):
OSTI ID: 1338651
Journal Information:
Physical Review Letters, Vol. 118, Issue 1; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Search for the decay B 0 γ γ journal February 2011