Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2004-04-07
JHEP0406:012,2004
Physics
High Energy Physics
High Energy Physics - Lattice
49 pages, 15 figures
Scientific paper
10.1088/1126-6708/2004/06/012
We test a variety of blocking and smearing algorithms for constructing glueball and string wave-functionals, and find some with much improved overlaps onto the lightest states. We use these algorithms to obtain improved results on the tensions of k-strings in SU(4), SU(6), and SU(8) gauge theories. We emphasise the major systematic errors that still need to be controlled in calculations of heavier k-strings, and perform calculations in SU(4) on an anisotropic lattice in a bid to minimise one of these. All these results point to the k-string tensions lying part-way between the `MQCD' and `Casimir Scaling' conjectures, with the power in 1/N of the leading correction lying in [1,2]. We also obtain some evidence for the presence of quasi-stable strings in calculations that do not use sources, and observe some near-degeneracies between (excited) strings in different representations. We also calculate the lightest glueball masses for N=2, ...,8, and extrapolate to N=infinity, obtaining results compatible with earlier work. We show that the N=infinity factorisation of the Euclidean correlators that are used in such mass calculations does not make the masses any less calculable at large N.
Lucini Biagio
Teper Michael
Wenger Urs
No associations
LandOfFree
Glueballs and k-strings in SU(N) gauge theories : calculations with improved operators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Glueballs and k-strings in SU(N) gauge theories : calculations with improved operators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Glueballs and k-strings in SU(N) gauge theories : calculations with improved operators will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-243712