Precision measurement of the η → π + π − π 0 Dalitz plot distribution with the KLOE detector
2016 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 5, 019Article in journal (Refereed) PublishedText
Using 1.6 fb−1 of e + e − → ϕ → ηγ data collected with the KLOE detector at DAΦNE, the Dalitz plot distribution for the η → π + π − π 0 decay is studied with the world’s largest sample of ∼ 4.7 · 106 events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables X and Y . The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a gX 2 Y term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements.
Place, publisher, year, edition, pages
2016. no 5, 019
e plus -e- Experiments; QCD
IdentifiersURN: urn:nbn:se:uu:diva-292944DOI: 10.1007/JHEP05(2016)019ISI: 000375714100001OAI: oai:DiVA.org:uu-292944DiVA: diva2:927033
FunderEU, European Research Council, RII3-CT- 2004-506078EU, European Research Council, 227431