Jet-associated deuteron production in pp collisions at $\sqrt{s}$ = 13 TeV

Shreyasi Acharya, Dagmar Adamova, Alexander Adler, Jonatan Adolfsson, Gianluca Aglieri Rinella, Michelangelo Agnello, Neelima Agrawal, Zubayer Ahammed, Shakeel Ahmad, Sang Un Ahn, Zaenal Akbar, Alexander Akindinov (+995 others)
2021 Physics letters / B 819  
Deuteron production in high-energy collisions is sensitive to the space–time evolution of the collision system, and is typically described by a coalescence mechanism. For the first time, we present results on jet-associated deuteron production in pp collisions at $\sqrt{s}$ = 13 TeV, providing an opportunity to test the established picture for deuteron production in events with a hard scattering. Using a trigger particle with high transverse-momentum ($p_T$ > 5 GeV/c) as a proxy for the
more » ... of a jet at midrapidity, we observe a measurable population of deuterons being produced around the jet proxy. The associated deuteron yield measured in a narrow angular range around the trigger particle differs by 2.4 – 4.8 standard deviations from the uncorrelated background. The data are described by PYTHIA model calculations featuring baryon coalescence.
doi:10.15120/gsi-2022-00104 fatcat:cfrnbhxokzbnflrftjnahpttqu