Evidence for η'π splitting in unquenched lattice QCD
Abstract
We perform an extrapolation from negative to positive flavour numbers of full QCD lattice estimates of the η' mass. The extrapolations are carried out by keeping ϱ and π masses at fixed values. We find an η'π splitting which shows a flavour dependence consistent with the WittenVeneziano formula based on the U(1) anomaly. The quantitative splitting is consistent with the estimates made in the quenched approximation.
 Publication:

Nuclear Physics B
 Pub Date:
 February 1996
 DOI:
 10.1016/S05503213(96)004683
 arXiv:
 arXiv:heplat/9605044
 Bibcode:
 1996NuPhB.480..381F
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 22 pages, uuencoded latex files, text + 8 figures