K+ -> pi+ nu nu(bar) and FCNC from non-universal Z' bosons

Details K+ -> pi+ nu nu(bar) and FCNC from non-universal Z' bosons K+ -> pi+ nu nu(bar) and FCNC from non-universal Z' bosons

2004-04-26

arxiv.org/abs/hep-ph/0404229v2

Phys.Rev. D70 (2004) 053003

Physics

High Energy Physics

High Energy Physics - Phenomenology

Typos corrected, references added, version to appear in PRD

Scientific paper

10.1103/PhysRevD.70.053003

Motivated by the E787 and E949 result for K+ -> pi+ nu nu(bar) we examine the effects of a new non-universal right-handed Z' boson on flavor changing processes. We place bounds on the tree-level FCNC from K-K(bar) and B-B(bar) mixing as well as from the observed CP violation in kaon decay. We discuss the implications for K -> pi nu nu(bar), B -> X nu nu(bar) and B -> tau+ tau-. We find that existing bounds allow substantial enhancements in the K+ -> pi+ nu nu(bar) rate, particularly through a new one-loop Z' penguin operator.

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