Rajaram D, Burnstein R A, Chakravorty A, Chan A, Chen Y C, Choong W S, Clark K, Dukes E C, Durandet C, Felix J, Gidal G, Gu P, Gustafson H R, Ho C, Holmstrom T, Huang M, James C, Jenkins C M, Kaplan D M, Lederman L M, Leros N, Longo M J, Lopez F, Lu L C, Luebke W, Luk K B, Nelson K S, Park H K, Perroud J-P, Rubin H A, Teng P K, Volk J, White C G, White S L, Zyla P
Illinois Institute of Technology, Chicago, IL 60616, USA.
Phys Rev Lett. 2005 May 13;94(18):181801. doi: 10.1103/PhysRevLett.94.181801. Epub 2005 May 10.
A sensitive search for the lepton-number-violating decay Xi(-)-->pmu(-)mu(-) has been performed using a sample of approximately 10(9) Xi(-) hyperons produced in 800 GeV/c p-Cu collisions. We obtain B(Xi(-)-->pmu(-)mu(-))<4.0x10(-8) at 90% confidence, improving on the best previous limit by 4 orders of magnitude.
利用在800 GeV/c的质子-铜碰撞中产生的约10⁹个Ξ⁻超子样本，对违反轻子数守恒的衰变Ξ⁻→π⁻μ⁻μ⁻进行了灵敏搜索。我们在90%置信水平下得到B(Ξ⁻→π⁻μ⁻μ⁻)<4.0×10⁻⁸，比之前的最佳限制提高了4个数量级。
