THE 7/11 RULE AND AN ESTIMATE OF mρ
نویسنده
چکیده
The two-point functions for the vector and axial currents Vμ = dγμu and Aμ = dγμγ5u contain information on the hadronic resonances ρ, ρ , a1, etc. While it has thus far not been possible to calculate these two-point functions from QCD, their behavior is constrained at low energy by Chiral Perturbation Theory (ChPT), at high energy by the OPE, and at all scales by large Nc, in which limit the two-point functions are saturated by an infinite tower of narrow resonances: 1 π ImΠV (t) = ∞
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تاریخ انتشار 2000