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arXiv · 1608.01444

Chargino contributions in light of recent $ε'/ε$

Motoi Endo·Satoshi Mishima·Daiki Ueda·Kei Yamamoto
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Abstract

Recently, the standard model prediction of $ε'/ε$ was improved, and a discrepancy from the experimental results was reported at the $2.9σ$ level. We study the chargino contributions to $Z$ penguin especially with the vacuum stability constraint. The vacuum decay rate is investigated, and it is shown that the discrepancy can be explained if superparticles are lighter than 4-6 TeV. Correlations with $\mathcal{B}(K_L\toπ^0ν\barν)$ and other experimental constraints are also discussed.

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Motoi Endo, Satoshi Mishima, Daiki Ueda, Kei Yamamoto. 2016-08-04. Chargino contributions in light of recent $ε'/ε$. https://doi.org/10.1016/j.physletb.2016.10.009

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