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arXiv 1609.01611hep-exnucl-ex
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中微子形成同位旋3/2 $Ξ$态的研究

Search for formation of isospin-3/2 $Ξ$ states by neutrinos

A. E. Asratyan

摘要:

在系统$ΛK^0_S π^-$、$ΛK^0_S π^+$、$ΛK^- π^-$和$ΛK^- π^+$的组合不变质谱中观察到一个1870 MeV附近的窄峰,这些系统是在$ν_μ$和$\bar{ν_μ}$诱导的与自由质子、氘和氖核的带电碰撞中形成的。观察到的共振宽度与完全由装置拖尾引起的一致。一个可能的解释是形成和三体$ΛK π$衰变的奇异重子与$I = 3/2$和$S = -2$。

英文摘要:

A narrow peak near 1870 MeV is observed in the combined invariant-mass spectrum of the systems $ΛK^0_S π^-$, $ΛK^0_S π^+$, $ΛK^- π^-$, and $ΛK^- π^+$ formed in $ν_μ$- and $\bar{ν_μ}$-induced charged-current collisions with free protons, deuterons, and Neon nuclei. Observed width of the resonance is consistent with being entirely due to apparatus smearing. A possible interpretation of the peak is formation and three-body $ΛK π$ decay of an exotic baryon with $I = 3/2$ and $S = -2$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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