Tagging boosted hadronic objects with dynamical grooming
- Brookhaven National Lab. (BNL), Upton, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States). RIKEN Research Center
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Bergen (Norway)
We evaluate the phenomenological applicability of the dynamical grooming technique, introduced in [1], to boosted W and top tagging at LHC conditions. An extension of our method intended for multi-prong decays with an internal mass scale, such as the top quark decay, is presented. First, we tackle the reconstruction of the mass distribution of W and top jets quantifying the smearing due to pileup. When compared to state-of-the-art grooming algorithms like SoftDrop and its recursive version, dynamical grooming shows an enhanced resilience to background fluctuations. In addition, we asses the discriminating power of dynamical grooming to distinguish W (top) jets from QCD ones by performing a two-step analysis: introduce a cut on the groomed mass around the W (top) mass peak followed by a restriction on the N-subjettinnes ratio τ21 (τ32). For W jets, the out-of-the-box version of dynamical grooming, free of ad-hoc parameters, results into a comparable performance to SoftDrop. Regarding the top tagger efficiency, 3-prong dynamical grooming, in spite of its simplicity, presents better performance than SoftDrop and similar results to Recursive SoftDrop.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP); Trond Mohn Foundation; USDOE
- Grant/Contract Number:
- SC0012704; BFS2018REK01
- OSTI ID:
- 1734422
- Alternate ID(s):
- OSTI ID: 1763350
- Report Number(s):
- BNL-220906-2021-JAAM; TRN: US2205960
- Journal Information:
- Physical Review. D., Vol. 102, Issue 11; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Identifying groomed jet splittings in heavy-ion collisions | text | January 2020 |
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