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论文题目:	Probing stop pair production at the LHC with graph neural networks
论文题目英文:
作者:	Abdughani, Murat; Ren, Jie; Wu, Lei; Yang, Jin Min
论文出处:
刊物名称:	JOURNAL OF HIGH ENERGY PHYSICS
年:	2019
卷:
期:	8
页:	55
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摘要:	Top-squarks (stops) play a crucial role for the naturalness of supersymmetry (SUSY). However, searching for the stops is a tough task at the LHC. To dig the stops out of the huge LHC data, various expert-constructed kinematic variables or cutting-edge analysis techniques have been invented. In this paper, we propose to represent collision events as event graphs and use the message passing neutral network (MPNN) to analyze the events. As a proof-of-concept, we use our method in the search of the stop pair production at the LHC, and find that our MPNN can efficiently discriminate the signal and back-ground events. In comparison with other machine learning methods (e.g. DNN), MPNN can enhance the mass reach of stop mass by several tens of GeV to over a hundred GeV.
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