Tetraquark-adequate QCD sum rules for quark-exchange processes
نویسندگان
چکیده
منابع مشابه
0 ( 2317 ) as a tetraquark state with QCD sum rules in heavy quark limit
In this article, we take the point of view that the charmed scalar meson Ds0(2317) be a tetraquark state and devote to calculate its mass within the framework of the QCD sum rules approach in the heavy quark limit. The numerical values for the mass of the Ds0(2317) are consistent with the experimental data, there must be some tetraquark component in the scalar meson Ds0(2317). Detailed discussi...
متن کاملHeavy quark masses from QCD sum rules
I review recent determinations of the (on-shell) charmand beauty-quark masses in the framework of relativistic and non-relativistic ratios of Laplace transform QCD moment sum rules. The validity of the non-relativistic version of QCD sum rules in this particular application is discussed. Invited talk at the Mexican School of Particles and Fields, Villahermosa, Mexico, October 1994. John Simon G...
متن کاملOn the ππ contribution to the QCD sum rules for the light tetraquark
We perform a QCD sum rule analysis for the light tetraquark taken into account the contribution arising from the two pion intermediate state. With the interpolating currents of the different chiral combinations of scalar and pseudoscalar diquarks and without including the form factor in the tetraquark–two pion vertex, it is shown that interpolating current with maximum chirality has a large cou...
متن کاملCharm-quark mass from weighted finite energy QCD sum rules
The running charm-quark mass in the MS scheme is determined from weighted finite energy QCD sum rules (FESR) involving the vector current correlator. Only the short distance expansion of this correlator is used, together with integration kernels (weights) involving positive powers of s, the squared energy. The optimal kernels are found to be a simple pinched kernel, and polynomials of the Legen...
متن کاملMass of the charm-quark from QCD sum rules
Relativistic and non-relativistic ratios of Laplace transform QCD moment sum rules for charmonium are used in order to determine the value of the on-shell charmquark mass. The validity of the non-relativistic version of QCD sum rules in this particular application is discussed. After using current values of the perturbative and non-perturbative QCD parameters, as well as experimental data on th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2019
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.100.074029