Zobrazeno 71 - 80
of 544
pro vyhledávání: '"Achasov, N"'
Publikováno v:
Nucl.Phys.Proc.Suppl.162B:127-134,2006
The following topics are considered. 1) Confinement, chiral dynamics, and light scalar mesons. 2) Chiral shielding of the $\sigma(600)$. 3) The $\phi$ meson radiative decays about nature of light scalar resonances. 4) The $J/\psi$ decays about nature
Externí odkaz:
http://arxiv.org/abs/hep-ph/0605126
Autor:
Achasov, N. N., Kozhevnikov, A. A.
Publikováno v:
Nuclear Physics B (Proc. Suppl.) 162 (2006) 135-138.
Using the chiral model of pseudoscalar, vector, and axial vector mesons based on the hidden local symmetry added with the terms induced by the Wess-Zumino anomaly, the results of calculations of the branching fractions of the decays omega(782) and ph
Externí odkaz:
http://arxiv.org/abs/hep-ph/0604099
Autor:
Achasov, N. N, Kiselev, A. V.
Publikováno v:
Phys.Rev.D73:054029,2006; Erratum-ibid.D74:059902,2006
The high-statistical KLOE data on the $\phi\to\pi^0\pi^0\gamma$ decay are described simultaneously with the data on $\pi\pi$ scattering and the $\pi\pi\to K\bar K$ reaction. The description is carried out taking into account the chiral shielding of t
Externí odkaz:
http://arxiv.org/abs/hep-ph/0512047
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Phys.Rev.D72:013006,2005
The Belle Collaboration results on the observation of the $f_0(980)$ resonance in the reaction $\gamma\gamma\to\pi^+\pi^-$ are analyzed. It is argued that they point to the presence of mechanisms which give rise to a strong distortion of the $f_0(980
Externí odkaz:
http://arxiv.org/abs/hep-ph/0506046
Autor:
Achasov, N. N., Kozhevnikov, A. A.
Publikováno v:
Phys.Atom.Nucl.69:988-998,2006; Yad.Fiz.69:1017-1027,2006
Taking into account the new data on the full width of D^{\ast\pm}(2010) and the mass difference of the charged and neutral beauty mesons B^\pm, B^0,\bar B^0, the branching ratios of the decays psi(3770), Upsilon(10580) to pi^+pi^-, K bar K, rho(omega
Externí odkaz:
http://arxiv.org/abs/hep-ph/0505146
Autor:
Achasov, N. N.
Publikováno v:
Phys.Part.Nucl. 36 (2005) S146-S149
The crucial points of physics of light scalar mesons are discussed. The special attention is given to the chiral shielding of lightest scalar mesons and the production of the well established light scalar mesons in the \phi radiative decays. Argument
Externí odkaz:
http://arxiv.org/abs/hep-ph/0412155
Autor:
Achasov, N. N., Kozhevnikov, A. A.
Publikováno v:
Phys.Rev. D71 (2005) 034015
The contribution of the a_1(1260) meson to the amplitudes of the decays rho(770) to 4 pi, omega(782) to 5 pi, and phi(1020) to 5 pi is analyzed in the chiral model of pseudoscalar, vector, and axial vector mesons based on the generalized hidden local
Externí odkaz:
http://arxiv.org/abs/hep-ph/0412077
Autor:
Achasov, N. N.
The following topics are considered. 1. Confinement, chiral dynamics and light scalar mesons. 2. $\phi$-meson radiative decays about nature of light scalar resonances. Arguments in favor of the four-quark model of the $a_0(980)$ and $f_0(980)$ mesons
Externí odkaz:
http://arxiv.org/abs/hep-ph/0410051
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Phys.Rev. D70 (2004) 074015
It is argued that the single-spin asymmetry in the reaction $\pi^-p\to a_0^0(980)n\to(\eta\pi^0)_S n$ is extremely sensitive to the mixing of the $a^0_0(980)$ and $f_0(980)$ resonances. It is shown that at low momentum transfers (namely, in any one o
Externí odkaz:
http://arxiv.org/abs/hep-ph/0405129
Autor:
Achasov, N. N., Shestakov, G. N.
Publikováno v:
Phys.Rev.Lett. 92 (2004) 182001
The $K^+$ and $K^0$ meson mass difference induces the mixing of the $a^0_0(980)$ and $f_0(980)$ resonances, the amplitude of which, between the $K^+K^-$ and $K^0\bar K^0$ thresholds, is large in magnitude, of the order of $ m_{K}\sqrt{m^2_{K^0}-m^2_{
Externí odkaz:
http://arxiv.org/abs/hep-ph/0312214