3–7 Apr 2017
University of Birmingham
Europe/London timezone

Possible Color Entanglement Effects in p+p and p+A Collisions

5 Apr 2017, 16:40
20m
West Building Seminar Room 1

West Building Seminar Room 1

WG6) Spin and 3D Structure WG6 Spin and 3D Structure

Speaker

Dr Michael Skoby (University of Michigan)

Description

Due to the non-Abelian nature of QCD, there is a prediction that quarks can become correlated across colliding protons in hadron production processes sensitive to nonperturbative transverse momentum effects. Measuring the evolution of nonperturbative transverse momentum widths as a function of the hard interaction scale can help distinguish these effects from other possibilities. Collins-Soper-Sterman evolution comes directly from the proof of transverse-momentum-dependent (TMD) factorization for processes such as Drell-Yan, semi-inclusive deep-inelastic scattering, and e+e- annihilation and predicts nonperturbative momentum widths to increase with hard scale. Experimental results from proton-proton and proton-nucleus collisions, in which TMD factorization is predicted to be broken, will be presented. The results show that these widths decrease with hard scale, suggesting possible TMD factorization breaking and color entanglement of partons across colliding protons.

Primary author

Dr Michael Skoby (University of Michigan)

Presentation materials