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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2025-08-21 0:49 |
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Conference: Bucharest University Faculty of Physics 2025 Meeting
Section: Theoretical and Computational Physics, High-Energy Physics, Applied Mathematics
Title:
Prospects for ultraheavy diquark scalar production decaying into an up quark and a vectorlike quark at the HL-LHC
Authors:
Matei-Stefan FILIP (1,2), Calin ALEXA (1), Ioana DUMINICA (1,2)
*
Affiliation:
1) Faculty of Physics, University of Bucharest, Atomiștilor 405, RO-077125, Măgurele, Romania
2) IFIN-HH, Reactorului 30, RO-077125, P.O.B. MG-6, Măgurele, Romania
E-mail
matei.filip@cern.ch
Keywords:
diquark scalar, vectorlike quark, HL-LHC
Abstract:
We present a prospect study for the production of a hypothetical diquark scalar (Suu) in the mass range of 7-8.5 TeV, considering future high-luminosity data corresponding to L = 3000 fb^{-1}. For this study we investigate the asymmetric decay of the Suu into an up quark and a vectorlike quark (χ). This topology is not only more computationally tractable, but also enables a comprehensive study of all three decay modes of χ: χ → Wb, χ → Ht, and χ → Zt. To explore this signature, we are generating dedicated signal samples using Monte Carlo simulations, incorporating different scenarios for the Yukawa couplings between Suu, up quarks and vectorlike quarks. In addition, we plan to employ Machine Learning algorithms to optimally separate signal from background by efficiently exploiting the kinematic differences between signal jets and Standard Model multijet backgrounds.
References:
[1] Bogdan A. Dobrescu, Robert M. Harris, Joshua Isaacson, Ultraheavy resonances at the LHC: beyond the QCD background, (2018) arXiv:1810.09429v1 [hep-ph].
[2] Bogdan A. Dobrescu, TeV-scale particles and LHC events with dijet pairs, (2024) arXiv:2411.04121v1 [hep-ph].
[3] Ioana Duminica, Calin Alexa, Ioan M. Dinu, Bogdan A. Dobrescu, Matei-Stefan Filip, Ultraheavy diquark decaying into vectorlike quarks at the LHC, (2025) arXiv:2503.17031 [hep-ph] (accepted at PRD).
[4] MadGraph, http://madgraph.phys.ucl.ac.be/
[5] PYTHIA, a program for the generation of high-energy physics collision events, https://pythia.org/
[6] Delphes, A framework for fast simulation of a generic collider experiment. http://arxiv.org/abs/1307.6346
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