Z -> pi(+)pi(-), K+K- : A touchstone of the perturbative QCD approach

Cheng, S; Qin, Q

Qin, Q (reprint author), Univ Siegen, Nat Wissensch Tech Fak, Theoret Phys 1, Walter Flex Str 3, D-57068 Siegen, Germany.

PHYSICAL REVIEW D, 2019; 99 (1):

Abstract

We study two rare decays, Z -> pi(+)pi(-) and K+K-, in the perturbative QCD approach up to the next-to-leading order of the strong coupling and the......

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