The decay constant of the first excited pion from lattice QCD

Content Provider	Semantic Scholar
Author	McNeile, Craig
Copyright Year	2006
Abstract	We review the theory that predicts that the decay constant of the excited light pseudo-scalar mesons are suppressed in the chiral limit relative to the pion decay constant. We compute the decay constant of the first excited pion (π ′) using unquenched QCD at a fixed lattice spacing with sea quarks of mass as low as a third the mass of the strange quark. The final result is very sensitive to the improvement conditions. We obtain f π ′ /fπ = 0.078(93) in the chiral limit.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://arxiv.org/pdf/hep-lat/0607032v1.pdf
Alternate Webpage(s)	http://arxiv.org/pdf/hep-lat/0607032v2.pdf
Language	English
Access Restriction	Open
Subject Keyword	Decay Constant Lattice QCD Lattice constant Mesons Pseudo brand of pseudoephedrine
Content Type	Text
Resource Type	Article