Data taking strategy for the phase study in \({\psi}'\to K^+K^-\)

DOI10.1142/S0217751X12501503zbMATH Open1277.81116arXiv1205.5362OpenAlexW3125824750MaRDI QIDQ2868736

Author name not available (Why is that?)

Publication date: 19 December 2013

Published in: (Search for Journal in Brave)

Abstract: The study of the relative phase between strong and electromagnetic amplitudes is of great importance for understanding the dynamics of charmonium decays. The information of the phase can be obtained model-independently by fitting the scan data of some special decay channels, one of which is

p s i^{p r i m e} o K^{+} K^{-}

. To find out the optimal data taking strategy for a scan experiment in the measurement of the phase in

p s i^{p r i m e} o K^{+} K^{-}

, the minimization process is analyzed from a theoretical point of view. The result indicates that for one parameter fit, only one data taking point in the vicinity of a resonance peak is sufficient to acquire the optimal precision. Numerical results are obtained by fitting simulated scan data. Besides the results related to the relative phase between strong and electromagnetic amplitudes, the method is extended to analyze the fits of other resonant parameters, such as the mass and the total decay width of

p s i^{p r i m e}

.

Full work available at URL: https://arxiv.org/abs/1205.5362

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