Excited Quarks Production at FCC and S$pp$C $pp$ Colliders

Abstract

Potential discovery, observation and exclusion limits of excited $u$ and $d$ quarks with gamma+jet final state are researched at the multi-TeV scale colliders, FCC and S$pp$C in this work. Both colliders, FCC and S$pp$C, show that excited $u$ and $d$ quarks could be discovered up to 42.1 TeV and 55.2 TeV for $u^{\star }$, 30.3 TeV and 39.4 TeV for $d^{\star }$ and 42.3 TeV and 55.5 TeV mass values for degenerate case (m${}_{u^{\star }}$ = m${}_{d^{\star }}$), respectively. Determination of excited quarks compositeness scale is examined, which will be up to multi-PeV level. Beside these analysis, free parameters ($f_s,f\text{and}{f}^{\prime }$) are scanned from around 0.1 up to 1 that show excited quark could be discovered at dozens of TeV with even coupling constants under 0.1.

Comments: 16 pages, 8 figures, 3 tables, 6 equations