Glueball mass measurements from improved staggered fermion simulations

Alan C. Irving; Christopher M. Richards; Craig McNeile (UKQCD Collaboration); Eric B. Gregory

arxiv: 1005.2473 · v2 · pith:5CYKWFGBnew · submitted 2010-05-14 · ✦ hep-lat · hep-ph

Glueball mass measurements from improved staggered fermion simulations

Christopher M. Richards , Alan C. Irving , Eric B. Gregory , Craig McNeile (UKQCD Collaboration) This is my paper

classification ✦ hep-lat hep-ph

keywords glueballmeasurementsmasspionspectrumstatesconfigurationsimproved

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We present the first 2+1 flavour spectrum measurements of glueball states using high statistics simulations with improved staggered fermions. We find a spectrum consistent with quenched measurements of scalar, pseudoscalar andtensor glueball states. The measurements were made using 5000 configurations at a lattice spacing of 0.123 fm and pion mass of 280 MeV and 3000 configurations at 0.092 fm with a pion mass of 360 MeV. We see some evidence of coupling to 2 pion states. We compare our results with the experimental glueball candidate spectrum as well as quenched glueball estimates.

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