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− π0 decay is studied with the world’s largest sample of ∼ 4.7 · 10^6 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 gX2Y term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements.
Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., et al. (2016). Precision measurement of the η → π+ π- π0 Dalitz plot distribution with the KLOE detector. JOURNAL OF HIGH ENERGY PHYSICS(5) [10.1007/JHEP05(2016)019].
Precision measurement of the η → π+ π- π0 Dalitz plot distribution with the KLOE detector
Fantini A.;Loffredo S.;Mascolo M.;Messi R.;Sarra I.;
2016-05-03
Abstract
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− π0 decay is studied with the world’s largest sample of ∼ 4.7 · 10^6 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 gX2Y term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements.| File | Dimensione | Formato | |
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