Correlator of the quark scalar currents and Γ<sub>tot</sub>(H → hadrons) at O(α<sub>s</sub>) in pQCD期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Correlator of the quark scalar currents and Γ_tot(H → hadrons) at O(α_s) in pQCD

Authors:	K. G. Chetyrkin

Abstract:	We present the results of the analytical evaluation of the massless four-loop Full-size image (α³_s) correction to the correlator of the quark scalar currents and the Higgs decay rate into hadrons. In numerical form we found (in Full-size image scheme) that Γ (H → Full-size image b ) = (3G_F/4 Full-size image π) M_Hm²_b (M_H) [1 + 5.667α_s/π + (35.94 − 1.359n_f) (α_s/π)² + (164.139 − 25.771n_f + 0.259n²_f) (α_s/π)³] where n_f is the number of quark flavour and α_s = α_s(M_H).

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