19,119 research outputs found
CGC phenomenology at RHIC and the LHC
I present a brief review of the recent phenomenological analyses of RHIC data
based on the the Color Glass Condensate, including the use of non-linear
evolution equations with running coupling. In particular, I focus in the study
of the total multiplicities in Au+Au collisions, and in the single inclusive
and double inclusive forward spectra in d+Au collisions. Predictions for the
LHC are also discussed.Comment: 4 pages, 5 figures. Contributed to the proceedings of the XLVth
Rencontres de Moriond, QCD session. March 13th - 20th, La Thuile, Ital
Azimuthal correlations of forward di-hadrons in d+Au collisions suppressed by saturation
RHIC experiments have recently measured the azimuthal correlation function of
forward di-hadrons. The data show a disappearance of the away-side peak in
central d+Au collisions, compared to p+p collisions, as was predicted by
saturation physics. Indeed, we argue that this effect, absent at mid-rapidity,
is a consequence of the small-x evolution into the saturation regime of the
Gold nucleus wave function. We show that the data are well described in the
Color Glass Condensate framework.Comment: 6 pages, 1 figure, Proceedings of the XXXVth International Conference
on High Energy Physics (ICHEP2010), Paris, France, July 22-28 201
Hot spots and the hollowness of proton-proton interactions at high energies
We present a dynamical explanation of the hollowness effect observed in
proton-proton scattering at TeV. This phenomenon, not observed
at lower energies, consists in a depletion of the inelasticity density at zero
impact parameter of the collision. Our analysis is based on three main
ingredients: we rely gluonic hot spots inside the proton as effective degrees
of freedom for the description of the scattering process. Next we assume that
some non-trivial correlation between the transverse positions of the hot spots
inside the proton exists. Finally we build the scattering amplitude from a
multiple scattering, Glauber-like series of collisions between hot spots. In
our approach, the onset of the hollowness effect is naturally explained as due
to the diffusion or growth of the hot spots in the transverse plane with
increasing collision energy.Comment: 4 pages, 3 figure
- …