Width of exotics from QCD sum rules : tetraquarks or molecules?

Details Width of exotics from QCD sum rules : tetraquarks or molecules? Width of exotics from QCD sum rules : tetraquarks or molecules?

2008-08-23

arxiv.org/abs/0808.3168v2

Phys.Rev.D78:076001,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 6 figures

Scientific paper

10.1103/PhysRevD.78.076001

We investigate the widths of the recently observed charmonium like resonances X(3872), Z(4430) and Z_2(4250) using QCD sum rules. Extending previous analyses regarding these states as diquark-antiquark states or molecules of D mesons, we introduce the Breit-Wigner function in the pole term. We find that introducing the width increases the mass at small Borel window region. Using the OPE up to dimension eight, we find that the sum rules based on interpolating current with molecular components give a stable Borel curve from which both the masses and widths of these resonances can be well obtained. Thus the QCD sum rule approach strongly favors the molecular description of these states.

Affiliated with

Also associated with

No associations

Rating

Width of exotics from QCD sum rules : tetraquarks or molecules? 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 Width of exotics from QCD sum rules : tetraquarks or molecules?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Width of exotics from QCD sum rules : tetraquarks or molecules? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-128975