论文标题
重建在Lepton Collider的半衰减颗粒成对的半衰减颗粒的质量
Reconstructing masses for semi-invisibly decaying particles pair-produced at lepton colliders
论文作者
论文摘要
我们提供了一组Lorentz不变的运动变量，用于重建Lepton Colliders的半衰减粒子的质量，$ M _ {\ rm rc}^{\ rm min} {\ rm min} $ lsp}^{\ rm max} $，带有分析公式。它们给出了腐烂的粒子质量的最小和最大边界，以及无形颗粒质量的上限。在搜索新物理学时，这些变量可以大大提高信号的统计意义。 For the process of smuon pair production at $\sqrt{s}=240~{\rm GeV}$ lepton collider of 5 ab$^{-1}$, the cross section detection limit is pushed by one order, and the expected exclusion and discovery limits are set above $\sqrt{s}\big/2$ and go into the off-shell region.此外，这些变量还可以用来提高完整松性衰减通道中$ w $ boson质量测量的精度。在Future Lepton Collider上，精度可以达到$ 2 \ SIM 3 $ MEV级别。
We present a set of Lorentz invariant kinematic variables for reconstructing mass of semi-invisible decaying particles pair-produced at lepton colliders, $m_{\rm RC}^{\rm min}$, $m_{\rm RC}^{\rm max}$ and $m_{\rm LSP}^{\rm max}$, with analytical formulas. They give the minimal and maximum bounds of the decaying particle mass and upper bound of the invisible particle mass. In the search of new physics, these variables can greatly enhance the statistical significance of signal. For the process of smuon pair production at $\sqrt{s}=240~{\rm GeV}$ lepton collider of 5 ab$^{-1}$, the cross section detection limit is pushed by one order, and the expected exclusion and discovery limits are set above $\sqrt{s}\big/2$ and go into the off-shell region. Moreover, these variables can also be used to improve the precision of $W$-boson mass measurement in full leptonic decayed channel. At future lepton collider, the precision can reach to $2\sim 3$ MeV level.
