K+ → π+ νν and FCNC from nonuniversal Z′ bosons

Xiao-Gang He, G. Valencia

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34 Citations (Scopus)


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.

Original languageEnglish
Article number053003
Number of pages1
JournalPhysical Review D
Issue number5
Publication statusPublished - 2004
Externally publishedYes

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