Light scalar mesons in QCD sum rules with inclusion of instantons
Light scalar mesons in QCD sum rules with inclusion of instantons
复制标题
QCD 中的光标量介子求和规则,包含瞬子
DOI:
10.1103/physrevd.79.114033
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发表时间:
2009-03
影响因子:
5
通讯作者:
Zhang, J.
中科院分区:
文献类型:
--
作者:
Zhang, Z. F.;Steele, T. G.;Jin, H. Y.;Lu, D. H.;Zhang, J.
The light scalar meson nonet above 1 GeV (i.e., the a{sub 0}, K{sub 0}* and f{sub 0}) are studied within the framework of QCD sum rules. In conventional QCD sum rules, the calculated masses of this nonet are degenerate, and the mass of K{sub 0}* is always larger than the a{sub 0} in contradiction with the observed spectrum. After improving the correlation function by including instanton effects, the masses are well separated from each other. In particular, our results show glueball content plays an important role in the underlying structure of f{sub 0}(1500). The sensitivity of the results on the instanton density is also discussed.
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影响因子:
2.8
作者:
SHIFMAN, MA;VAINSHTEIN, AI;ZAKHAROV, VI
通讯作者:
ZAKHAROV, VI
影响因子:
5
作者:
C. Morningstar;M. Peardon
通讯作者:
C. Morningstar;M. Peardon
DOI:
10.1016/s0375-9474(00)00567-4
发表时间:
2000-07
期刊:
Nuclear Physics
影响因子:
--
作者:
D. Harnett;T. Steele;V. Elias
通讯作者:
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DOI:
10.1016/0550-3213(82)90479-5
发表时间:
1982-08
期刊:
Nuclear Physics
影响因子:
--
作者:
E. Shuryak
通讯作者:
E. Shuryak
DOI:
10.1016/0370-1573(85)90065-1
发表时间:
1985-10
期刊:
Physics Reports
影响因子:
--
作者:
L. Reinders;H. Rubinstein;S. Yazaki
通讯作者:
L. Reinders;H. Rubinstein;S. Yazaki