Amplitude analysis of d-s(+) -> pi(+)pi(0)eta and first observation of the w-annihilation dominant decays d-s(+) -> a(0)(980)(+)pi(0) and d-s(+) -> a(0)(980)(0)pi(+)
Date
2019-09-12
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
We present the first amplitude analysis of the decay D-s(+) -> pi(+)pi(0)eta. We use an e(+)e(-) collision data sample corresponding to an integrated luminosity of 3.19 fb(-1) collected with the BESIII detector at a center-of-mass energy of 4.178 GeV. We observe for the first time the W-annihilation dominant decays D-s(+) -> a(0)(980)(+)pi(0) and D-s(+) -> a(0)(980)(0)pi(+). We measure the absolute branching fraction B(D-s(+) -> a(0)(980)(+(0))pi(0(+)), a(0)(980)(+(0)) -> pi(+(0))eta = (1.46 +/- 0.15(stat) +/- 0.23 sys)%, which is larger than the branching fractions of other measured pure W-annihilation decays by at least one order of magnitude. In addition, we measure the branching fraction of D-s(+) -> pi(+)pi(0)eta with significantly improved precision.
Description
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Keywords
Physics, Atomic physics, A-center, Absolute branching fractions, Amplitude analysis, Branching fractions, Data sample, Integrated luminosity
Citation
Ablikim, M. vd. (2019). ''Amplitude analysis of d-s(+) -> pi(+)pi(0)eta and first observation of the w-annihilation dominant decays d-s(+) -> a(0)(980)(+)pi(0) and d-s(+) -> a(0)(980)(0)pi(+)''. Physical Review Letters, 123(11).