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. (c) 2007 Elsevier B.V. All rights reserved.
Measurement of the Dalitz plot slope parameters of the K(+/-) -> pi(+/-)pi(+)pi(-) decay
COSTANTINI, FLAVIO;GIUDICI, SERGIO;LAMANNA, GIANLUCA;SOZZI, MARCO STANISLAO;
2007-01-01
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. (c) 2007 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
