https://doi.org/10.1140/epjc/s10052-019-6605-y
Regular Article - Theoretical Physics
Constraints on the intrinsic charm content of the proton from recent ATLAS data
1
Joint Institute for Nuclear Research, Dubna, 141980, Moscow region, Russia
2
SLAC National Accelerator Laboratory, Stanford University, Stanford, CA, 94025, USA
3
Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119991, Russia
4
Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynska Dolina, 842 48, Bratislava, Slovakia
* e-mail: gennady.lykasov@cern.ch
Received:
31
August
2018
Accepted:
17
January
2019
Published online:
30
January
2019
We investigate the possibility to constrain the intrinsic charm probability 
using first ATLAS data on the associated production of prompt photons and charm-quark jets in pp collisions at 
TeV. The upper limit 
% is obtained at the 68 % confidence level. This constraint is primarily determined from the theoretical scale and systematical experimental uncertainties. Suggestions for reducing these uncertainties are discussed. The implications of intrinsic heavy quarks in the proton for future studies at the LHC are also discussed.
© The Author(s), 2019
