Exotic glueball 0±− states in QCD sum rules
نویسندگان
چکیده
منابع مشابه
Qcd Glueball Sum Rules and Vacuum Topology
Several key problems of QCD sum rules in the spin-0 glueball channels are resolved by implementing nonperturbative short-distance physics from direct instantons and topological charge screening. A lattice-based instanton size distribution and the IR renormalization of the nonperturbative Wilson coefficients are also introduced. Results of a comprehensive quantitative sum rule analysis are revie...
متن کاملDetermination of the scalar glueball mass in QCD sum rules
The 0 glueball mass is analyzed in the QCD sum rules. We show that in order to determine the 0 glueball mass by using the QCD sum rules method, it is necessary to clarify the following three ingredients: (1) to choose the appropriate moment with acceptable parameters which satisfy all of the criteria; (2) to take account into the radiative corrections; (3) to estimate an additional contribution...
متن کاملMass of the Lowest Scalar (0) Glueball in the QCD Sum Rules
The mass of the lowest scalar glueball is discussed by using QCD sum rules. We find that the glueball mass is sensitive to the choice of moments and slightly depends on the radiative corrections. With the help of suitable moments and stability criteria, we get the scalar glueball mass: 1710 ± 110 MeV without radiative corrections and 1580 ± 150 MeV with radiative corrections.
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 کاملTransition Form Factor γγ ∗ → π 0 and QCD sum rules
The transition γ * (q 1)γ * (q 2) → π • (p) is studied within the QCD sum rule framework. As a first step, we analyze the kinematic situation when both photon virtualities are spacelike and large. We construct a QCD sum rule for F γ * γ * π • (q 2 1 , q 2 2) and show that, in the asymptotic limit |q 2 1 |, |q 2 2 | → ∞, it reproduces the leading-order pQCD result. Then we study the limit |q 2 1...
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: 2017
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.96.114024