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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2025-08-21 0:35 |
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Conference: Bucharest University Faculty of Physics 2025 Meeting
Section: Theoretical and Computational Physics, High-Energy Physics, Applied Mathematics
Title:
Diquark scalar production at the TeV scale
Authors:
Ioana DUMINICA (1,2), Calin ALEXA (2), Ioan-Mihail DINU (2), Bogdan A. DOBRESCU (3), Matei-Stefan FILIP (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
3) Particle Theory Department, Fermilab, PO Box 500, Batavia IL, USA
E-mail
ioana.duminica@cern.ch
Keywords:
diquark scalar, Monte Carlo, Random Forest, LHC
Abstract:
We assess the diquark scalar Suu discovery potential at the LHC in the 7-8.5 TeV mass range, given the upcoming high-luminosity update. Monte Carlo techniques are used to simulate signal and background samples. We consider a Suu diquark scalar coupling to up-quarks (yuu≥0.2) subsequently decaying into two vectorlike quarks (ꭓ). The final state of the targeted process consists of 6 high-pT jets coming from (Wb) pairs corresponding to a standard decay mode of vectorlike quarks. Boosted Decision Tree and Random Forest are the Machine Learning algorithms used to build a signal-from-background discriminator, which encapsulates the most relevant signal events characteristics. We estimate that for an integrated luminosity of 3000 fb^{-1}, ATLAS and/or CMS have a good potential to discover or rule out an ultraheavy diquark scalar with nearly 8 TeV mass and minimum Yukawa couplings.
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] The CMS Collaboration, Search for resonant and nonresonant production of pairs of dijet resonances in proton-proton collisions at s=13 TeV, (2022) arXiv:2206.09997v1 [hep-ex].
[3] Bogdan A. Dobrescu, TeV-scale particles and LHC events with dijet pairs, (2024) arXiv:2411.04121v1 [hep-ph].
[4] 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).
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