Signatures of gluon saturation from structure-function measurements

Signatures of gluon saturation in high energy scattering

Froissart Bound from Gluon Saturation

We demonstrate that the dipole-hadron cross-section computed from the non-linear evolution equation for the Colour Glass Condensate saturates the Froissart bound in the case of a fixed coupling and for a small dipole (Q ≫ Λ2QCD). That is, the cross-section increases as the logarithm squared of the energy, with a proportionality coefficient involving the pion mass and the BFKL intercept (αsNc/π)...

J/ψ photo- and electroproduction, the saturation scale and the gluon structure function

Our approach to low-x deep inelastic scattering based on the ~l⊥ factorization of perturbative QCD (the color-dipole picture) yields parameter-free absolute predictions for J/ψ production. The connection of J/ψ production to the low-x saturation scale and to the gluon structure function is clarified. ∗ Supported by Deutsche Forschungsgemeinschaft, contract number schi 189/6-2 and the Ministry o...

The Gluon Spin Structure Function from Slac E161

We will determine the gluon spin density ∆g(x) in the nucleon by measuring the asymmetry for polarized photo-production of charmed quarks from polarized targets in End Station A at SLAC. The quasi-mono-chromatic circularly polarized photon beam will be produced from an oriented diamond crystal. The target will be longitudinally polarized LiD at a temperature of 0.3 K, centered in a 6.5 T magnet...

Quark-Gluon Plasma Signatures

Aspects of quark-gluon plasma signatures that can be measured by CMS are discussed. First the initial conditions of the system from minijet production are introduced, including shadowing effects. Color screening of the Upsilon family is then presented, followed by energy loss effects on charm and bottom hadrons, high pT jets and global observables. ∗) This work was supported in part by the Dire...