论文标题
角度切割以将tautaubar+喷气背景降低到LHC处的higgsino信号
Angular cuts to reduce the tautaubar+jet background to the higgsino signal at the LHC
论文作者
论文摘要
我们与LHC的硬质量QD喷气式飞机相关联，重新检查了Higgsino的生产。我们专注于\ ell^ +\ ell^ - +Met +从生产和随后的衰减中的喷气事件，\ tchi_2^0 \ to \ tchi_1^0 \ ell^ +\ ell^ - ，来自沉重的中性higgsino。我们分析的新功能是，我们提出了角度切割，以比M_ {τττ}^2 <0更有效地从z（ - >τ\barτ）+射流事件减少不可还原背景。还需要划定其他切割，以减少T \ bar {t}，wwj和w/z+\ ell \ bar {\ ell}生产所需的背景。我们评估300和3000〜fb^{ - 1}的LHC14的覆盖范围，并强调Dilepton质量分布将有助于表征Higgsino信号。
We re-examine higgsino pair production in association with a hard QCD jet at the LHC. We focus on \ell^+\ell^- +MET +jet events from the production and subsequent decay, \tchi_2^0\to\tchi_1^0\ell^+\ell^-, of the heavier neutral higgsino. The novel feature of our analysis is that we propose angular cuts to reduce the irreducible background from Z(-> τ\barτ)+jet events more efficiently than the m_{ττ}^2<0 cut that has been used by the ATLAS and CMS collaborations. Additional cuts, needed to reduce backgrounds from t\bar{t}, WWj and W/Z+\ell\bar{\ell} production, are also delineated. We evaluate the reach of LHC14 for 300 and 3000~fb^{-1} and stress that the dilepton mass distribution would serve to characterize the higgsino signal.
