Phys. Rev. D 53, R1–R5 (1996)

Rare kaon decays with ‘‘missing energy’’

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William J. Marciano and Zohreh Parsa
Brookhaven National Laboratory, P.O. Box 5000, Upton, New York 11973-5000
National Institute for Nuclear Theory, Box 351550, University of Washington, Seattle, Washington 98195-1550

Received 30 August 1995; published in the issue dated 1 January 1996

Rare kaon decays due to the loop-induced standard model operator s¯_Lγ_μd_Lν¯_Lγ^μν_L are examined. Isospin-violating mass effects and electroweak radiative corrections are shown to reduce B(K⁺→π⁺νν¯) and B(K_L→π⁰νν¯) relative to B(K⁺→π⁰e⁺ν_e) by 10% and 5.6%, respectively. Predicted branching ratios for (K_L→νν¯γ) and (K_L→νν¯) (if neutrinos have mass) are given. The sensitivity of ‘‘missing energy’’ rare K decays to new interactions or the emission of light weakly interacting neutral particles, other than neutrinos, is also briefly discussed. © 1995 The American Physical Society.

URL:

http://link.aps.org/doi/10.1103/PhysRevD.53.R1

DOI:

10.1103/PhysRevD.53.R1

PACS:

13.20.Eb, 12.15.Lk

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Phys. Rev. D 53, R1–R5 (1996)

Rare kaon decays with ‘‘missing energy’’