Probing Compositeness with the CMS $eejj$ & $eej$ Data

Understand

Quark-lepton compositeness is a well-known beyond the Standard Model (SM) scenario with heavy exotic particles like leptoquarks (LQs) and leptogluons (LGs) etc.

• These particles can couple to leptons and jets simultaneously.
• In this letter, we use the recent CMS scalar LQ search data in the $eejj$ and $eej$ channels to probe this scenario.
• We recast the data in terms of a color octet partner of the SM electron (or a first generation spin-1/2 LG) that couples to an electron and a gluon via a dimension five operator suppressed by the quark-lepton compositeness scale ($\Lambda$).