Linear vs. non-linear QCD evolution: from HERA data to LHC phenomenology

J. L. Albacete (1) , J. G. Milhano , P. Quiroga-Arias (2) , J. Rojo

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 LPTHE - Laboratoire de Physique Théorique et Hautes Energies

The very precise combined HERA data provides a testing ground in which the relevance of novel QCD regimes, other than the successful linear DGLAP evolution, in small-x inclusive DIS data can be ascertained. We present a study of the dependence of the AAMQS fits, based on the running coupling BK non-linear evolution equations (rcBK), on the fitted dataset. This allows for the identification of the kinematical region where rcBK accurately describes the data, and thus for the determination of its applicability boundary. We compare the rcBK results with NNLO DGLAP fits, obtained with the NNPDF methodology with analogous kinematical cuts. Further, we explore the impact on LHC phenomenology of applying stringent kinematical cuts to the low-x HERA data in a DGLAP fit.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique des Hautes Energies - Phénoménologie [hep-ph]

J. L. Albacete, J. G. Milhano, P. Quiroga-Arias, J. Rojo. Linear vs. non-linear QCD evolution: from HERA data to LHC phenomenology. European Physical Journal C: Particles and Fields, 2012, 72 (9), pp.2131. ⟨10.1140/epjc/s10052-012-2131-x⟩. ⟨in2p3-00740426⟩