1. Nuclear Physics & RIKEN Theory Seminar

    "Particles from the Colored Glass: diffraction, DIS and hadron production"

    Presented by Heikki Mantysaari, University of Jyvaskyla

    Friday, January 10, 2014, 2 pm
    Small Seminar Room, Bldg. 510

    Hosted by: Bjoern Schenke

    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. Complementary input can be obtained from diffractive vector meson production where also the impact parameter dependence of the dipole amplitude is probed. We discuss how tightly the electron-proton DIS data constrains the dipole amplitude and how the LHC single inclusive spectra can be used to further test the CGC picture. Then using only information from DIS experiments we generalize the dipole amplitude to nuclear targets and compute particle production in proton-nucleus collisions. We present predictions for the nuclear suppression factor R_pA and compare with pQCD calculations [1]. We also discuss the possibility to use ultrearelativistic heavy ions as a photon source and study diffractive vector meson production in ultraperipheral nucleus-nucleus collisions. We present our predictions for the coherent and incoherent J/\Psi production and compare with available experimental data [2]. References: [1] T. Lappi, H. Mäntysaari, Phys.Rev. D88 (2013) 114020 [2] T. Lappi, H. Mäntysaari, Phys.Rev. C87 (2013) 032201