期刊
PHYSICS LETTERS B
卷 793, 期 -, 页码 41-47出版社
ELSEVIER
DOI: 10.1016/j.physletb.2019.04.018
关键词
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资金
- National Science Foundation [PHY-1316617, PHY-1620628]
- National Natural Science Foundation of China [11775023]
- Fundamental Research Funds for the Central Universities
- Department of Energy [DE-AC0205CH11231]
- LDRD Program of Lawrence Berkeley National Laboratory
Jet angularities are a class of jet substructure observables where a continuous parameter is introduced in order to interpolate between different classic observables such as the jet mass and jet broadening. We consider jet angularities measured on an inclusive jet sample at the LHC where the soft drop grooming procedure is applied in order to remove soft contaminations from the jets. The soft drop algorithm allows for a precise comparison between theory and data and could be used to extract the QCD strong coupling constant us from jet substructure data in the future. We develop a framework to realize the resummation of all relevant large logarithms at the next-to-leading logarithmic (NLL) accuracy. To demonstrate that the developed formalism is suitable for the extraction of us, we extend our calculations to next-to-next-to-leading logarithm (NNLL) for the jet mass case. Overall, we find good agreement between our NLL numerical results and Pythia simulations for LHC kinematics and we observe an improved agreement when the NNLL components are included. In addition, we expect that groomed jet angularities will be a useful handle for studying the modification of jets in heavy-ion collisions. (C) 2019 Published by Elsevier B.V.
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