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Электронный каталог: Osipov, A. A. - Isospin Symmetry Breaking in the *p*0, *h, *h' *> *g*g Decays
Osipov, A. A. - Isospin Symmetry Breaking in the *p*0, *h, *h' *> *g*g Decays
Статья
Автор: Osipov, A. A.
Physical Review D: Isospin Symmetry Breaking in the *p*0, *h, *h' *> *g*g Decays
б.г.
ISBN отсутствует
Автор: Osipov, A. A.
Physical Review D: Isospin Symmetry Breaking in the *p*0, *h, *h' *> *g*g Decays
б.г.
ISBN отсутствует
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Статья
Osipov, A.A.
Isospin Symmetry Breaking in the *p*0, *h, *h' *> *g*g Decays / A.A.Osipov. – Text : electronic // Physical Review D. – 2026. – Vol. 113, No. 1. – P. 014034. – URL: https://doi.org/10.1103/34vs-mxqp. – Bibliogr.:.
Isospin violating effects, both due to the nonvanishing quark mass difference 𝑚&sub(𝑑) −𝑚&sub(𝑢) and to virtual photons, are studied by fitting the squared masses of pseudoscalar mesons to the next-to-leading order in the simultaneous expansion in powers of 1/𝑁&sub(𝑐), momenta, and quark masses. It is shown that electromagnetic corrections significantly affect the values of the 𝜋*0 −𝜂 and 𝜋*0 −𝜂′ mixing angles and have virtually no effect on the 𝜂 −𝜂′ mixing angle. The 𝜋*0,𝜂,𝜂′ →𝛾𝛾 decay widths are calculated. In particular, it is found that Γ&sub(𝜋*0→𝛾𝛾) =7.82 ±0.01 eV. This result is in full agreement with the latest data of the PrimEx-I and PrimEx-II collaborations Γ&sup(exp)&sub(𝜋0→𝛾𝛾)=7.802±0.052(stat.)±0.105(syst.) eV.
ОИЯИ = ОИЯИ (JINR)2026
Osipov, A.A.
Isospin Symmetry Breaking in the *p*0, *h, *h' *> *g*g Decays / A.A.Osipov. – Text : electronic // Physical Review D. – 2026. – Vol. 113, No. 1. – P. 014034. – URL: https://doi.org/10.1103/34vs-mxqp. – Bibliogr.:.
Isospin violating effects, both due to the nonvanishing quark mass difference 𝑚&sub(𝑑) −𝑚&sub(𝑢) and to virtual photons, are studied by fitting the squared masses of pseudoscalar mesons to the next-to-leading order in the simultaneous expansion in powers of 1/𝑁&sub(𝑐), momenta, and quark masses. It is shown that electromagnetic corrections significantly affect the values of the 𝜋*0 −𝜂 and 𝜋*0 −𝜂′ mixing angles and have virtually no effect on the 𝜂 −𝜂′ mixing angle. The 𝜋*0,𝜂,𝜂′ →𝛾𝛾 decay widths are calculated. In particular, it is found that Γ&sub(𝜋*0→𝛾𝛾) =7.82 ±0.01 eV. This result is in full agreement with the latest data of the PrimEx-I and PrimEx-II collaborations Γ&sup(exp)&sub(𝜋0→𝛾𝛾)=7.802±0.052(stat.)±0.105(syst.) eV.
ОИЯИ = ОИЯИ (JINR)2026
