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Polarization in K^+ → π^+μ^+μ^−

Savage, Martin J. and Wise, Mark B. (1990) Polarization in K^+ → π^+μ^+μ^−. Physics Letters B, 250 (1-2). pp. 151-154. ISSN 0370-2693. doi:10.1016/0370-2693(90)91170-G.

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The parity violating asymmetry [(Γ_R−Γ_L)/(Γ_R+Γ_L)], where Γ_R and Γ_L are the rates to produce right handed and left handed μ^+ in the decay K^+ → π^+μ^+μ^−, is discussed. We examine the contribution to this asymmetry from the interference of the “Z-penguin” and “W-box” with the standard one-photon contribution in the minimal standard model and in models with two Higgs doublets. The asymmetry is sensitive to extensions of the Higgs sector. Time reversal violating polarization effects are also considered. We show that the polarization of the μ^+ perpendicular to the μ^+μ^− decay plane is small.

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Additional Information:© 1990 Elsevier Science Publishers B.V. Received 12 August 1990. This work supported in part by the US Department of Energy under Contract No. DE-AC0381-ER40050. We wish to thank M. Zeller for stimulating and informative discussions.
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Department of Energy (DOE)DE-AC0381-ER40050
Issue or Number:1-2
Record Number:CaltechAUTHORS:20170906-094954136
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Official Citation:Martin J. Savage, Mark B. Wise, Polarization in K → , Physics Letters B, Volume 250, Issue 1, 1990, Pages 151-154, ISSN 0370-2693, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81184
Deposited By: Ruth Sustaita
Deposited On:06 Sep 2017 17:09
Last Modified:15 Nov 2021 19:41

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