Observation of Enhanced Double Parton Scattering in Proton-Lead Collisions at root s(NN)=8.16 TeV

A study of prompt charm-hadron pair production in proton-lead collisions at root s(NN) = 8.16 TeV is performed using data corresponding to an integrated luminosity of about 30 nb(-1), 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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Hossein Afsharnia, Liupan An, Guido Andreassi, Vladislav Balagura, Aurelio Bay, Violaine Bellée, Federico Betti, Marc-Olivier Bettler, Frédéric Blanc, Alexey Boldyrev, Maxim Borisyak, Sara Celani, Serhii Cholak, Peter Clarke, Victor Coco, Tommaso Colombo, Michel De Cian, Hans Dijkstra, Mirco Dorigo, Paolo Durante, Dipanwita Dutta, Surapat Ek-In, Lino Ferreira Lopes, Christoph Frei, Elena Graverini, Guido Haefeli, Xiaoxue Han, Plamen Hristov Hopchev, Thibaud Humair, Veronica Sølund Kirsebom, Almagul Kondybayeva, Yiming Li, Ho Ling Li, Vladimir Macko, Pietro Marino, Maurizio Martinelli, Katharina Müller, Tatsuya Nakada, Tara Nanut, Matthew Needham, Niko Neufeld, Preema Rennee Pais, Anton Petrov, Guillaume Max Pietrzyk, Renato Quagliani, Gerhard Raven, Federico Leo Redi, Olivier Schneider, Maxime Schubiger, Sebastian Schulte, Lesya Shchutska, Evgenii Shmanin, Pavol Stefko, Maria Elena Stramaglia, Zhipeng Tang, Frédéric Teubert, Mark Tobin, Minh Tâm Tran, Carina Trippl, Zheng Wang, Yi Wang, Jian Wang, Zhirui Xu, Hang Yin, Lei Zhang, Yu Zheng, Yao Zhou
AMER PHYSICAL SOC, 2020
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https://infoscience.epfl.ch/record/282121?ln=fr

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