ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Tagging top in leptonic decay

Chatterjee, S and Godbole, R and Roy, TS (2019) Tagging top in leptonic decay. In: Proceedings of Science, 10-17 July 2019, Ghent; Belgium.

Pro-Sci-364.pdf - Published Version

Download (645kB) | Preview
Official URL: https://dx.doi.org/10.22323/1.364.0672


We propose a method to identify jets consisting of all the visible remnants of a boosted top quark decaying semileptonically with an electron in the final state. An overlap of electron shower with the b quark initiated shower, and the large nontrivial energy-momentum carried by the invisible neutrino in the top quark decay are the two obstacles to achieving this aim. Our method uses the distribution of energy in different parts of the detector to identify a jet containing an energetic electron, involves use of substructure of the jet to determine the momentum associated with the electron and then completes the identification of top jet with the construction of new variables which would reflect the top quark decay kinematics. The last part involves an ansatz of the existence of a massless, invisible 4-momentum roughly collimated with the electron, whose 4-momentum when combined with that of the the electron and the full jet, reconstructs to the W boson and the top quark respectively. We demonstrate the efficacy of this proposal using simulated data and show that our method not only reduces the backgrounds from light flavor jets, b jets from QCD, and hadronic top jets, it can also tell apart jets rich in electrons but not due to top quark decays. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

Item Type: Conference Paper
Publication: Proceedings of Science
Publisher: Sissa Medialab Srl
Additional Information: cited By 0; Conference of 2019 European Physical Society Conference on High Energy Physics, EPS-HEP 2019 ; Conference Date: 10 July 2019 Through 17 July 2019; Conference Code:166163
Keywords: Bosons; Decay (organic), Decay kinematics; Energetic electron; Energy momentum; Final state; Leptonic decay; Top quarks; W bosons, Electrons
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 19 Jan 2021 06:15
Last Modified: 19 Jan 2021 06:15
URI: http://eprints.iisc.ac.in/id/eprint/67752

Actions (login required)

View Item View Item