Observation of double charm production involving open charm in pp collisions at $\sqrt{s}$=7 TeV
LHCb Collaboration: R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi,, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander,, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves Jr, S. Amato, Y. Amhis,, J. Anderson, R. B. Appleby, O. Aquines Gutierrez
TL;DR
This paper reports the observation and measurement of double charm production involving open charm in proton-proton collisions at 7 TeV, providing model-independent cross-sections and comparing results with theoretical models.
Contribution
It presents the first measurements of double charm production involving open charm in pp collisions at 7 TeV, with model-independent cross-section results and event property analysis.
Findings
Observation of $J/\psi$ with open charm and charm pairs
Model-independent cross-section measurements
Comparison with theoretical predictions
Abstract
The production of mesons accompanied by open charm, and of pairs of open charm hadrons are observed in pp collisions at a centre-of-mass energy of 7 TeV using an integrated luminosity of collected with the LHCb detector. Model independent measurements of absolute cross-sections are given together with ratios to the measured and open charm cross-sections. The properties of these events are studied and compared to theoretical predictions.
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