$\tau $ Vector Spectral Function from a Chirally Invariant Hadronic Model with Weak Interaction
نویسندگان
چکیده
منابع مشابه
Vector and axial - vector correlators in a chirally symmetric model
We present a chirally symmetric hadronic model for the vector and axial-vector correlators in vacuum. The dominant contributions to these correlators come from intermediate pions, ρ and a 1 mesons which are calculated in one-loop approximation. The resulting spectral functions are compared with the data obtained by the ALEPH collaboration from τ decay. In the vector channel we find good agreeme...
متن کاملThe Chirally Normalized Vector Meson Dominance Model and Semihadronic Tau Decays
We discuss and test the assumptions of the chirally normalized vector meson dominance model (CN-VMD), as it is used for tau decays. We compare the CN-VMD amplitudes with those using on-shell couplings, derived directly from experimental data. We discuss in detail the 3π, KKπ and 2π final states. We suggest that the true values for the K1 widths might be larger than those quoted in the Review of...
متن کاملLower Higgs boson mass bounds from a chirally invariant lattice Higgs-Yukawa model with overlap fermions
We study the coupling parameter dependence of the Higgs boson mass in a chirally invariant lattice Higgs-Yukawa model emulating the same Yukawa coupling structure as in the Higgs-fermion sector of the Standard Model. Eventually, the aim is to establish non-perturbative upper and lower Higgs boson mass bounds derived from first principles, in particular not relying on vacuum stability considerat...
متن کاملConfronting QCD with the experimental hadronic spectral functions from tau - decay 1
The (non-strange) vector and axial-vector spectral functions extracted from τ decay by the ALEPH collaboration are confronted with QCD in the framework of a Finite Energy QCD sum rule involving a polynomial kernel tuned to suppress the region beyond the kinematical end point where there is no longer data. Results show excellent agreement between data and perturbative QCD in a remarkably wide en...
متن کاملMeasurement of the Strong Coupling Constant αs and the Vector and Axial-Vector Spectral Functions in Hadronic Tau Decays
The spectral functions of the vector current and the axial-vector current have been measured in hadronic τ decays using the OPAL detector at LEP. Within the framework of the Operator Product Expansion a simultaneous determination of the strong coupling constant αs, the non-perturbative operators of dimension 6 and 8 and of the gluon condensate has been performed. Different perturbative descript...
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: Acta Physica Polonica B Proceedings Supplement
سال: 2015
ISSN: 1899-2358,2082-7865
DOI: 10.5506/aphyspolbsupp.8.175