Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Testing the tetraquark mixing framework from QCD sum rules for a(0)(980)

Authors
Lee, Hee-JungKim, K. S.Kim, Hungchong
Issue Date
22-8월-2019
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.100, no.3
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
100
Number
3
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/63486
DOI
10.1103/PhysRevD.100.034021
ISSN
2470-0010
Abstract
According to a recent proposal of the tetraquark mixing framework, the two light-meson nonets in the J(P) = 0(+) channel, namely, the light nonet composed of a(0) (980), K-0*(800), f(0) (500), f(0) (980), and the heavy nonet of a(0) (1450), K-0*1430), f(0) (1370), f(0) (1500), can be expressed by linear combinations of the two tetraquark types, one type containing the spin-0 diquark and the other with the spin-1 diquark. Among various consequences of this mixing model, one surprising result is that the second tetraquark with the spin1 diquark configuration is more important for the light nonet. In this work, we report that this result can be supported by the QCD sum rule calculation. In particular, we construct a QCD sum rule for the isovector resonance a(0) (980) using an interpolating field composed of both tetraquark types and then perform the operator product expansion up to dimension 10 operators. Our sum rule analysis shows that the spin-1 diquark configuration is crucial in generating the a(0) (980) mass. Also, the mixed correlation function constructed from the two tetraquark types is found to have large strength, which seems consistent with what the tetraquark mixing framework is advocating. On the other hand, the correlation function from the interpolating field with the spin-0 diquark configuration alone fails to predict the a(0) (980) mass mostly by the huge negative contribution from dimension 8 operators.
Files in This Item
There are no files associated with this item.
Appears in
Collections
ETC > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Altmetrics

Total Views & Downloads

BROWSE