The 34th International Symposium on Lattice Field Theory (Lattice 2016)

24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

Using a new analysis method to extract excited states in the scalar meson sector

25 Jul 2016, 17:05
20m
Building B2a Room 2065 (Highfield Campus, University of Southampton)

Speaker

Dr Jacob Finkenrath (german)

Description

We present an alternative method to the Generalized Eigenvalue Problem (GEVP) for extracting excited states. The method is based on statistically sampling the space of possible set of parameters according to the $\chi^2$-value of each set of values. This method is particularly suited when one has noisy data as is the case for some correlators at large times such as in the scalar light qqbar channel. We will apply this method to the analysis of the $J^P = 0^+$ channels used in the search for the $a_0$ particle and compare the results to the standard GEVP approach, pointing out advantages and disadvantages of the method compare to the GEVP approach.

Primary author

Dr Jacob Finkenrath (german)

Co-authors

Prof. Constantia Alexandrou (University of Cyprus and The Cyprus Institute) Mr Joshua Berlin (University of Frankfurt) Prof. Marc Wagner (Goethe University Frankfurt) Dr Theodoros Leontiou (Frederick University)

 Slides