用助推校正的同横质量测量超对称粒子质量
Supersymmetric particle mass measurement with the boost-corrected contransverse mass
摘要：
提出了一种修正的用于测量成对产生的半不可见衰变重粒子质量的共横质量（MCT）技术，其中对实验室横平面中重态的动量中心（CoM）框架的非零提升进行了修正。缺乏CoM帧的质量的知识阻止了对该增强的精确校正，然而，示出了仍然可以导出保守校正，其总是生成小于或等于CoM帧中的MCT的真实值的MCT值。这种新技术被证明与完全轻子ttbar事件和SUSY事件具有类似的最终状态的质量测量的案例研究。
英文摘要：
A modification to the contransverse mass (MCT) technique for measuring the masses of pair-produced semi-invisibly decaying heavy particles is proposed in which MCT is corrected for non-zero boosts of the centre-of-momentum (CoM) frame of the heavy states in the laboratory transverse plane. Lack of knowledge of the mass of the CoM frame prevents exact correction for this boost, however it is shown that a conservative correction can nevertheless be derived which always generates an MCT value which is less than or equal to the true value of MCT in the CoM frame. The new technique is demonstrated with case studies of mass measurement with fully leptonic ttbar events and with SUSY events possessing a similar final state.
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