Hidden-bottom and -charm hexaquark states in QCD sum rules
نویسندگان
چکیده
منابع مشابه
Charm and bottom quark masses from QCD moment sum rules
In this work the charm and bottom quark masses are determined from QCD moment sum rules for the charmonium and upsilon systems. In our analysis we include both the results from non-relativistic QCD and perturbation theory at next-next-to-leading order. For the pole masses we obtain Mc = 1.75± 0.15 GeV and Mb = 4.98± 0.125 GeV. Using the potential-subtracted mass in intermediate steps of the cal...
متن کاملQCD moment sum rules for Coulomb systems: the charm and bottom quark masses
In this work the charm and bottom quark masses are determined from QCD moment sum rules for the charmonium and upsilon systems. To illustrate the special character of these sum rules when applied to Coulomb systems we first set up and study the behaviour of the sum rules in quantum mechanics. In our analysis we include both the results from nonrelativistic QCD and perturbation theory at next-ne...
متن کاملDiquark-Antidiquark with open charm in QCD sum rules
Using the QCD sum rule approach we investigate the possible four-quark structure of the recently observed charmed scalar mesons D 0(2308) (BELLE) and D 0,+ 0 (2405) (FOCUS) and also of the very narrow D sJ (2317), firstly observed by BABAR. We use diquak-antidiquark currents and work to the order of ms in full QCD, without relying on 1/mc expansion. Our results indicate that a fourquark structu...
متن کاملMultiquark states and QCD sum rules
There have been arguments about hadronic molecules, which are weakly-bound states of two or more hadrons. We investigate the possibility of some candidates (f0(980), a0(980), f0(1500), f0(1710), etc.) using QCD sum rule approach and compare our results with multiquark states in the MIT bag model. We find that f0(1500), f0(1710) can be good candidates for vector-vector molecule-type multiquark s...
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: The European Physical Journal C
سال: 2020
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s10052-020-7701-8