Observation of enhanced double parton scattering in proton-lead collisions at $\sqrt{s_\mathrm{NN}}=8.16$ TeV
LHCb collaboration: R. Aaij, C. Abell\'an Beteta, T. Ackernley, B., Adeva, M. Adinolfi, H. Afsharnia, C.A. Aidala, S. Aiola, Z. Ajaltouni, S., Akar, J. Albrecht, F. Alessio, M. Alexander, A. Alfonso Albero, Z. Aliouche,, G. Alkhazov, P. Alvarez Cartelle, A.A. Alves Jr, S. Amato
TL;DR
This paper reports the first measurement of associated charm-hadron pair production in proton-lead collisions at 8.16 TeV, confirming an enhancement of double parton scattering compared to single scattering.
Contribution
It presents the first measurement of charm-hadron pair production in proton-lead collisions and demonstrates the enhancement of double parton scattering in such collisions.
Findings
Confirmed enhancement of double parton scattering in proton-lead collisions
Measured production cross-sections for charm-hadron pairs
Investigated kinematic correlations between charm hadrons
Abstract
A study of prompt charm-hadron pair production in proton-lead collisions at TeV is performed using data corresponding to an integrated luminosity of about 30 nb, collected with the LHCb experiment. Production cross-sections for different pairs of charm hadrons are measured and kinematic correlations between the two charm hadrons are investigated. This is the first measurement of associated production of two charm hadrons in proton-lead collisions. The results confirm the predicted enhancement of double parton scattering production in proton-lead collisions compared to the single parton scattering production.
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