Pure gauge and glueball spectrum

[mfrasca60]

Hi there,

I have compiled the MILC code on my machine to work with pure gauge and gluon propagator. I have generated the input files for gluon_prop by su3_hmc and then I tried to plot what I get from the output file of the former (the data appear to be marked by the labels START_GLUON_PROP and END_GLUON_PROP). What I get is something that does not agree with known results as one can see from e.g. https://arxiv.org/pdf/1611.03642.pdf (see fig.2) and my enclosed figure. It is also difficult for me to see how could a glueball spectrum be obtained similarly to what is seen in e.g. https://inspirehep.net/files/377a31b7e706b0700453ec49b05865a2. Do some set of utilities exist to accomplish such tasks? Am I missing something about gauge fixing?

[daschaich]

I've never touched the gluon_prop application, but I see it has a test subdirectory. Are you able to reproduce the sample output in gluon_prop/test? If not, then that's something that others could try to reproduce and diagnose. If the tests check out, then that suggests the problem may be with the input configurations or the output post-processing.

[mfrasca60]

Yes, the tests worked fine. I have also plotted the propagator data in the output test files. The possibility, in agreement with what you say, is that the pure_gauge did not give proper data to work with gluon_prop. Please, note that also the tests in pure_gauge worked fine (I have obtained agreement to the decimals). I have QUDA running to perform all these computations.