Identifying heavy-flavor jets using vectors of locally aggregated descriptors

0541977 - ÚJF 2022 RIV GB eng J - Journal Article
Bielčíková, Jana - Kunnawalkam, E. - Ponimatkin, Georgij - Putschke, J. - Sivic, J.
Identifying heavy-flavor jets using vectors of locally aggregated descriptors.
Journal of Instrumentation. Roč. 16, č. 3 (2021), č. článku P03017. ISSN 1748-0221. E-ISSN 1748-0221
R&D Projects: GA MŠMT LTT18002
Research Infrastructure: BNL-CZ II - 90109
Institutional support: RVO:61389005
Keywords : data processing methods * pattern recognition * cluster finding * calibration and fitting methods * software architectures
OECD category: Particles and field physics
Impact factor: 1.121, year: 2021
Method of publishing: Limited access
https://doi.org/10.1088/1748-0221/16/03/P03017

Jets of collimated particles serve a multitude of purposes in high energy collisions. Recently, studies of jet interaction with the quark-gluon plasma (QGP) created in high energy heavy ion collisions are of growing interest, particularly towards understanding partonic energy loss in the QGP medium and its related modifications of the jet shower and fragmentation. Since the QGP is a colored medium, the extent of jet quenching and consequently, the transport properties of the medium are expected to be sensitive to fundamental properties of the jets such as the flavor of the parton that initiates the jet. Identifying the jet flavor enables an extraction of the mass dependence in jet-QGP interactions. We present a novel approach to tagging heavy-flavor jets at collider experiments utilizing the information contained within jet constituents via the JetVLAD model architecture. We show the performance of this model in proton-proton collisions at center of mass energy root s = 200 GeV as characterized by common metrics and showcase its ability to extract high purity heavy-flavor jet sample at various jet momenta and realistic production cross-sections including a brief discussion on the impact of out-of-time pile-up. Such studies open new opportunities for future high purity heavy-flavor measurements at jet energies accessible at current and future collider experiments.
Permanent Link: http://hdl.handle.net/11104/0319486