Scalar and Vector 4Q Systems in Anisotropic Lattice QCD

Details Scalar and Vector 4Q Systems in Anisotropic Lattice QCD Scalar and Vector 4Q Systems in Anisotropic Lattice QCD

2009-07-21

arxiv.org/abs/0907.3609v1

Eur.Phys.J.C57:579,2008

Physics

High Energy Physics

High Energy Physics - Lattice

9 pages, 10 figures, typos corrected

Scientific paper

We present a detailed study of some $4q$ hadrons in quenched improved anisotropic lattice QCD. Using the $\pi\pi$ and diquark-antidiquark local and smeared operators, we attempt to isolate the signal for $I(J^{P})=0(0^{+}), 2(0^{+})$ and $1(1^{+})$ states in two flavour QCD. In the chiral limit of light-quark mass region, the lowest scalar $4q$ state is found to have a mass, $m^{I=0}_{4q}=927(12)$ MeV, which is slightly lower than the experimentally observed $f_{0}(980)$. The results from our variational analysis do not indicate a signature of a tetraquark resonance in I=1 and I=2 channels. After the chiral extrapolation the lowest $1(1^{+})$ state is found to have a mass, $m^{I=1}_{4q}=1358(28)$ MeV. We analysed the static $4q$ potential extracted form a tetraquark Wilson loop and illustrated the behaviour of the $4q$ state as a bound state, unbinding at some critical diquark separation. From our analysis we conclude that scalar $4q$ system appears as a two-pion scattering state and that there is no spatially-localised $4q$ state in the light-quark mass region.

Affiliated with

Also associated with

No associations

Rating

Scalar and Vector 4Q Systems in Anisotropic Lattice QCD 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 Scalar and Vector 4Q Systems in Anisotropic Lattice QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scalar and Vector 4Q Systems in Anisotropic Lattice QCD will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-175706