Two-Hadron-Irreducible QCD Sum Rule for Pentaquark Baryon

Details Two-Hadron-Irreducible QCD Sum Rule for Pentaquark Baryon Two-Hadron-Irreducible QCD Sum Rule for Pentaquark Baryon

2004-04-30

arxiv.org/abs/hep-ph/0404285v1

Phys.Lett. B611 (2005) 93-101

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 3 figures

Scientific paper

10.1016/j.physletb.2005.01.070

We point out that naive pentaquark correlations function include two-hadron-reducible contributions, which are given by convolution of baryon and meson correlation functions and have nothing to do with pentaquark. We show that the two-hadron-reducible contributions are large in the operator product expansion of the correlation functions of three existing works on the pentaquark. Therefore, it is dangerous to draw a conclusion from the sum rules using naive pentaquark correlation functions with naive ansatz for the spectral function under the dispersion integral. Instead, we propose to use the two-hadron-irreducible correlation function, which is obtained by subtracting the two-hadron-reducible contribution from the naive correlation function. Taking one of the works as an example we demonstrate how drastically the results can change if we remove the two-hadron-reducible part from the naive correlation function. We obtain the result opposite to the original work for the parity of the pentaquark.

Affiliated with

Also associated with

No associations

Rating

Two-Hadron-Irreducible QCD Sum Rule for Pentaquark Baryon 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 Two-Hadron-Irreducible QCD Sum Rule for Pentaquark Baryon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-Hadron-Irreducible QCD Sum Rule for Pentaquark Baryon will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-286942