Mitigating Large Background in Jet Substructure Observables
1 Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai, China 200433
2 Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
3 C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, NY 11794, USA
4 Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794, USA
5 Theoretical Division T-2, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
Published online: 16 June 2020
We discuss a new approach for jet physics analysis by using subtraction between cumulants of jet substructure observables. The subtracted cumulants are insensitive to soft-particle background uncorrelated with the hard process and allow comparisons between theoretical results and experimental measurements without the complication of soft background like underlying and pile-up events. We find our method using jet mass cumulants efficiently eliminates the background in Monte Carlo simulations and ATLAS jet mass measurements and they show a good agreement with our analytic calculations performed using soft-collinear effective theory.
© The Authors, published by EDP Sciences, 2020
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