ELECTROMAGNETIC FORM-FACTOR OF THE π MESON WITH LIGHT-CONE QCD SUM RULES
نویسندگان
چکیده
منابع مشابه
Electromagnetic form-factor of the π meson with light-cone QCD sum rules
In this article, we calculate the electromagnetic form-factor of the π meson with the light-cone QCD sum rules. The numerical value fp(0) = 0.999±0.001 is in excellent agreement with the experimental data (extrapolated to the limit of zero momentum transfer). For large momentum transfers, the values from the two sum rules are all comparable with the experimental data and theoretical estimations...
متن کاملπ with light - cone QCD sum rules
In this article, we take the point of view that the light scalar meson a0(980) is a conventional qq̄ state, and calculate the coupling constants ga0ηπ0 and ga0η′π0 with the light-cone QCD sum rules. The central value of the coupling constant ga0ηπ0 is consistent with the one extracted from the radiative decay φ(1020) → a0(980)γ → ηπ0γ. The central value and lower bound of the decay width Γa0→ηπ0...
متن کاملElectromagnetic form factors of the ρ meson in light cone QCD sum rules
We investigate the electromagnetic form factors of the ρ meson in light cone QCD sum rules. We find that the ratio of the magnetic and charge form factors is larger than two at all values of Q2, (Q2 ≥ 0.5 GeV 2). The values of the individual form factors at fixed values of Q2 predicted by the light cone QCD sum rules are quite different compared to the results of other approaches. These results...
متن کاملwith light - cone QCD sum rules Zhi -
In this article, we take the point of view that the light scalar meson a0(980) is a conventional qq̄ state, and calculate the coupling constants ga0ηπ0 and ga0η′π0 with the light-cone QCD sum rules. The central value of the coupling constant ga0ηπ0 is consistent with the one extracted from the radiative decay φ(1020) → a0(980)γ → ηπ0γ. The central value and lower bound of the decay width Γa0→ηπ0...
متن کاملpπ with light - cone QCD sum rules
In this article, we calculate the strong coupling constant g∆Nπ and study the strong decay ∆++ → pπ with the light-cone QCD sum rules. The numerical value of the strong coupling constant g∆Nπ is consistent with the experimental data. The small discrepancy maybe due to failure to take into account the perturbative O(αs) corrections. PACS numbers: 13.30.-a; 13.75.Gx
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: International Journal of Modern Physics A
سال: 2008
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x08041499