Speaker
Heikki Mäntysaari
(University of Jyväskylä)
Description
Single inclusive hadron production in the forward rapidiy region in
deuteron-gold collisions is well understood in the Color Glass Condensate
(CGC) framework. As a complement to single inclusive spectra, detailed
information is obtained with two-particle correlations. Recent
measurements of the azimuthal angle correlations at RHIC have shown that
there is a strong suppression of the away side peak at forward rapidities.
This is easily understood in the CGC framework: the produced partons are
initially back-to-back in the transverse plane, but the interaction with
the nucleus causes a momentum transfer of the order of the saturation
scale. In forward dihadron production the small-$x$ structure of the
nucleus is probed, implying a large saturation scale.
We present on going work on calculating the dihadron correlation using the
running coupling BK equation. We include the inelastic terms neglected in
some of the previous literature and show that they naturally contain the
double parton scattering part that has so far been treated as a separate
contribution. We also use, for the first time in a phenomenological
application, a Gaussian approximation of JIMWLK to go beyond the large-Nc
limit.
Primary author
Heikki Mäntysaari
(University of Jyväskylä)
