The University of Liverpool Research Archive

 Scholarly Communication Overview Wellcome Trust Open Access Policy Contacts

The decay constant of the first excited pion from lattice QCD

McNeile, C. and Michael, C. (2006) The decay constant of the first excited pion from lattice QCD. Physics Letters B, 642 (3). pp. 244-247. ISSN 0370-2693

 Preview
PDF
124Kb
 Preview
Postscript (Requires a viewer, such as GSview)
197Kb

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 ($\pi^\prime$) 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 $f_{\pi^\prime} / f_{\pi}$ = 0.078(93) in the chiral limit.

Item Type: Article LTH 707. arXiv Number: arXiv:hep-lat/0607032v2. Available online 11 October 2006. Issue: 9 November 2006. QUARK MASSES; SUM-RULES; RENORMALIZATION Q Science > QC Physics Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences 10.1016/j.physletb.2006.09.056 http://arxiv.org/abs/hep-lat/0607032v2 No Published 101 10 Oct 2007 13:06 20 May 2011 19:37

Repository Staff Only: item control page

 Search Full text only Peer reviewed only Browse Cross Archive Search Find Top 50 authors Top 50 items [more statistics]

These pages are maintained by Library Staff @ University of Liverpool Library