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The role of the underlying event in the charm-baryon enhancement observed in pp collisions at LHC energies

Zoltán Varga, Anett Misák, Róbert Vértesi

SciPost Phys. Proc. 15, 014 (2024) · published 2 April 2024

Proceedings event

51st International Symposium on Multiparticle Dynamics


We study the enhanced production of $\Lambda_c$ charmed baryons relative to that of charmed $D^0$ mesons in proton–proton collisions at LHC energies. We simulated collision events with the enhanced color-reconnection model in PYTHIA 8 MC generator and propose measurements based on the comparative use of different event-activity classifiers to identify the source of the charmed-baryon enhancement. We demonstrate that in this enhanced color-reconnection scenario the excess production is primarily linked to the underlying event and not to the production of high-momentum jets.

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