Bulletin of the American Physical Society
Fall 2022 Meeting of the APS Division of Nuclear Physics
Volume 67, Number 17
Thursday–Sunday, October 27–30, 2022; Time Zone: Central Daylight Time, USA; New Orleans, Louisiana
Session KJ: Mini-Symposium: Light Meson Decays II
10:30 AM–12:06 PM,
Saturday, October 29, 2022
Hyatt Regency Hotel
Room: Imperial 11
Chair: Susan Schadmand, GSI Helmholtzzentrum fur Schwerionenfors
Abstract: KJ.00002 : Measurement of η→π0γγ decay in KLOE experiment
11:06 AM–11:18 AM
Presenter:
Marcin Berlowski
(National Centre for Nuclear Research)
Author:
Marcin Berlowski
(National Centre for Nuclear Research)
Collaboration:
KLOE
This process gives an unique way to test ChPT because of its sensitivity to the p^6 term on both the branching ratio and the M2(γγ) spectrum. Moreover
the shape of M2(γγ) distribution can help to either distinguish or provide the constrains for various theoretical models.
A previous preliminary KLOE measurement, based on 450 pb-1, provided a much lower BR value than the most accurate determination from Crystal Ball experiment.
A new analysis with a larger data sample (1.7 fb-1) is in progress to confirm this result. The preliminary value for BR and dΓ/dM2(γγ) partial decay width spectrum will
be presented.
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