Speaker
Heikki Mäntysaari
(University of Jyväskylä)
Description
The Color Class Condensate offers a consistent framework to describe
high-energy (small-x) data from various experiments. The
non-perturbative input for these calculations, the dipole-target
amplitude at initial Bjorken-x, can be obtained by performing a fit to
electron-proton deep inelastic scattering data.
We determine the initial condition for the small-x evolution equation (rcBK)
from the HERA DIS data using a new parametrization that also keeps the
unintegrated gluon distribution positive. We also obtain error sets that can be
used to compute uncertainty estimates for any observable that depends
on the dipole amplitude.
As an application we compute single inclusive particle production in
proton-proton and proton-nucleus collisions with uncertainty
estimates. We show that the LHC data can be used to further constrain the
initial dipole amplitude. In order to compute proton-nucleus collisions we
generalize our dipole-proton amplitude to nuclear targets using only input
from HERA and standard nuclear geometry. We obtain a good description with
the available LHC nuclear suppression factor data.
References:
T. Lappi, H. Mäntysaari, in progress
T. Lappi, H. Mäntysaari, Phys.Rev. D88 (2013) 114020
Primary author
Heikki Mäntysaari
(University of Jyväskylä)
Co-author
Tuomas Lappi
(University of Jyvaskyla)
