The distribution of the K(+/-) -> pi(+/-)pi(+)pi(-) decays in the Dalitz plot has been measured by the NA48/2 experiment at the CERN SPS with a sample of 4.71 x 10(8) fully reconstructed events. With the standard Particle Data Group parameterization the following values of the slope parameters were obtained: g = (-21.134 +/- 0.017)%, h= (1.848 +/- 0.040)%, k = (-0.463 +/- 0.014)%. The quality and statistical accuracy of the data have allowed an improvement in precision by more than an order of magnitude, and are such as to warrant a more elaborate theoretical treatment, including pion-pion rescattering, which is in preparation.
Measurement of the Dalitz plot slopes of the K±-> π±π+π- decay
MARTELLI, FILIPPO;VELTRI, MICHELE;
2007
Abstract
The distribution of the K(+/-) -> pi(+/-)pi(+)pi(-) decays in the Dalitz plot has been measured by the NA48/2 experiment at the CERN SPS with a sample of 4.71 x 10(8) fully reconstructed events. With the standard Particle Data Group parameterization the following values of the slope parameters were obtained: g = (-21.134 +/- 0.017)%, h= (1.848 +/- 0.040)%, k = (-0.463 +/- 0.014)%. The quality and statistical accuracy of the data have allowed an improvement in precision by more than an order of magnitude, and are such as to warrant a more elaborate theoretical treatment, including pion-pion rescattering, which is in preparation.File in questo prodotto:
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