4 papers
Jet Topology
Lingfeng Li, Tao Liu, Si-Jun Xu
We introduce persistent Betti numbers to characterize topological structure of jets. These topological invariants measure multiplicity and connectivity of jet branches at a given s…
Cosmological Signatures of Superheavy Dark Matter
Lingfeng Li, Shiyun Lu, Yi Wang +1
We discuss two possible scenarios, namely the curvaton mechanism and the dark matter density modulation, where non-Gaussianity signals of superheavy dark matter produced by gravity…
Boosted scalar confronting 750 GeV di-photon excess
Yun Jiang, Lingfeng Li, Rui Zheng
We consider the di-photon signal arises from two bunches of collimated photon jets emitting from a pair of highly boosted scalars. Following the discussion of detecting the photon…
Stop Search in the Compressed Region via Semileptonic Decays
Hsin-Chia Cheng, Christina Gao, Lingfeng Li +1
In supersymmetric extensions of the Standard Model, the superpartners of the top quark (stops) play the crucial role in addressing the naturalness problem. For direct pair-producti…