K<sup>+</sup> → π<sup>+</sup> νν and FCNC from nonuniversal Z′ bosons
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology
Journal Volume
70
Journal Issue
5
Date Issued
2004
Author(s)
Valencia, G.
Abstract
Motivated by the E787 and E949 result for K+ → π+ νν we examine the effects of a new nonuniversal right-handed Z′ boson on flavor changing processes. We place bounds on the tree-level flavor-changing neutral current from K - K̄ and B - B̄ mixing as well as from the observed CP violation in kaon decay. We discuss the implications for K → πνν, B → Xνν and B → τ+τ-. We find that the existing bounds allow substantial enhancements in the K+ → π+ νν rate, particularly through a new one-loop Z′ penguin operator.
SDGs
Type
journal article