LHCP 2013 - First Large Hadron Collider Physics Conference

Searching for intrinsic charm inside the proton at the LHC

Not scheduled

20m

Hotel Catalonia Barcelona Plaza, Barcelona - Spain

Theory Poster

Speakers

Prof. Gennady Lykasov (Joint Instirute for Nuclear Research, Dubna, Russia) Mark Stockton (McGill University (CA))Mr Mikhail Demichev (Joint Institute for Nuclear Research, Duna, Russia) Tzvetalina Stavreva (LPSC)

Description

Searching for the intrinsic heavy quark component in the proton suggested in [1] was proposed recently in the forward charmed meson production in pp collisions at the LHC [2]. We extend this study to the inclusive LHC pp-production of c(b)- jets accompanied by photons. It is stimulated by the DØ and CDF results for the production of prompt photons and c(b)-jets in p¯p collisions at the TEVATRON, where an indication of the possible contribution of the intrinsic charm in the proton was observed [3, 4, 5, 6]. In particular, a possibility to study the intrinsic charm and bottom contributions to processes like pp ! + c(b) + X is discussed. Some promising theoretical expectations for these processes are given, which could be searched for and verified at the LHC in pp-collisions at ps = 7–14 TeV. We show that the ratio of pT spectra of prompt photons produced in the hard process pp ! +c(jet)+X at ps =8 TeV with and without the intrinsic charm contribution can be about 250%-400% at high transverse momenta p T >200 GeV/c of the photon. References [1] S.Brodsky, P.Hoyer, C.Peterson and N.Sakai, Phys.Lett. B93 (1980) 451. [2] G.I. Lykasov, V.A. Bednyakov, A.F. Pikelner and N.I. Zimin, Europhys.Lett., 99 (2012) 21002. [3] V.M. Abazov, et.al., Phys.Rev.Lett., 102 (2009) 192002. [4] V.M. Abazov, et.al., Phys. Lett. B, 719 (2013) 354. [5] T. Aaltonen, et.al., Phys.Rev.D, 81 (2010) 052006. [6] T. Stavreva and J. F, Owens, Phys.Rev.D, 79 (2009) 054017.