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arXiv · 2503.17031

Ultraheavy diquark decaying into vectorlike quarks at the LHC

Ioana Duminica·Calin Alexa·Ioan M. Dinu·Bogdan A. Dobrescu·Matei-Stefan Filip
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Abstract

We explore the discovery potential of an ultraheavy $(7-8.5$ TeV) diquark scalar produced in the collisions of two up quarks at the LHC. Assuming that the diquark scalar decays into two vectorlike quarks of mass around 2 TeV, each of them decaying into a $W^{+}$ boson and a $b$ quark, we focus on the fully-hadronic final state. We present a signal-from-background separation study based on a discriminator built with Machine Learning techniques. For this six-jet final state and a luminosity of $3000 \ \text{fb}^{-1}$, we estimate that a diquark scalar of mass near 8 TeV may be discovered or ruled out even when its coupling to up quarks is as low as 0.2.

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Ioana Duminica, Calin Alexa, Ioan M. Dinu, Bogdan A. Dobrescu, Matei-Stefan Filip. 2025-03-21. Ultraheavy diquark decaying into vectorlike quarks at the LHC. https://doi.org/10.1103/hxll-41ly

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