Search for Lepton Number Violation and resonances in the K± →πμμ at the NA48/2 experiment

7th International Conference on Beauty, Charm, and Hyperons in Hadronic Interactions

Lazzeroni, C.^1

School of Physics and Astronomy, University of Birmingham, United Kingdom^1

关键词: Lepton number violations;    Lepton-number-violating decay;    Upper limits;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/770/1/012032/pdf
DOI  :  10.1088/1742-6596/770/1/012032

来源: IOP

【 摘 要 】

Thanks to a large sample of kaon decays collected in 2003-2004, the NA48/2 experiment at CERN is able to set an upper limit on the rate of the lepton number violating decay BR(K→πμμ )-11at 90%CL, and to set limits at the 10-10- 10-9level on the appearance of resonances (including heavy neutral leptons N4and inflatons χ) in the K→πμμ decays as functions of the resonance mass and lifetime.