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Observation of $K_S^0$ semileptonic decays with CMD-2 detector

High Energy Physics - Experiment 2012-08-27 v1
Authors: CMD2 Collaboration
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Abstract

The decay KS0→πeνK_S^0 \to \pi e \nu has been observed by the CMD-2 detector at the e^+e^- collider VEPP-2M at Novosibirsk. Of 6 million produced KL0KS0K_L^0K_S^0 pairs, 75±1375 \pm 13 events of the KS0→πeνK_S^0 \to \pi e \nu decay were selected. The corresponding branching ratio is B(KS0→πeν)=(7.2±1.4)×10−4B(K_S^0 \to \pi e \nu)=(7.2 \pm 1.4)\times10^{-4}. This result is consistent with the evaluation of B(KS0→πeν)B(K_S^0 \to \pi e \nu) from the KL0K_L^0 semileptonic rate and KS0K_S^0 lifetime assuming ΔS=ΔQ\Delta S=\Delta Q .

Keywords

K_S^0 semileptonic decay CMD-2 detector branching ratio VEPP-2M

Cite

@article{arxiv.hep-ex/9905022,
  title  = {Observation of $K_S^0$ semileptonic decays with CMD-2 detector},
  author = {CMD2 Collaboration},
  journal= {arXiv preprint arXiv:hep-ex/9905022},
  year   = {2012}
}

Comments

7 pages, 6 figures, LaTex2e. Submitted to Phys.Lett.B

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