Dalitz plot studies of D0 to K0S pi+ pi- decays
Abstract
The availaible data on the D0 to K0S pi+ pi- decays are analysed in the framework of the quasi two-body QCD factorization approximation. The annihilation, via W-exchange, amplitudes are added to the weak-decay tree amplitudes. The doubly Cabibbo suppressed parts of the amplitudes are also considered. The strong interactions between the kaon-pion and pion-pion pairs in the S-, P- and D-final states are described in terms of the corresponding form factors. The kaon-pion or pion-pion scalar and vector form factors are constrained by other experimental data. Unitarity, analyticity and chiral symmetry are also used to obtain their functional forms. We go through a minimization procedure to reproduce the K0S pi-, K0S pi+ and pi+ pi- effective mass projections of the Dalitz plot distributions. The large number (27) of non-zero amplitudes leads to a large number of parameters. The resulting model distributions and branching fractions are compared to the accurate Belle Collaboration data.
Cite
@article{arxiv.1209.4805,
title = {Dalitz plot studies of D0 to K0S pi+ pi- decays},
author = {L. Lesniak and R. Kaminski and A. Furman and J. -P. Dedonder and B. Loiseau},
journal= {arXiv preprint arXiv:1209.4805},
year = {2017}
}
Comments
4 pages, 1 figure, contribution to 12th International Workshop on Meson Production and Interaction MESON 2012, Krakow (Poland), May 31 - June 5. 2012, to appear in European Journal Web of Conferences