Finite Nc corrections in the Balitsky-Kovchegov equation at next-to-leading order

Jun 1, 2020, 12:00 PM

Oral Presentation Initial State Parallel


Andrecia Ramnath (University of Jyvaskyla)


The Colour Glass Condensate effective field theory is a useful framework for studying heavy ion collisions at ultrarelativistic energies, such as those reached at the Large Hadron Collider at CERN. In this framework, we study the rapidity evolution of Wilson lines that appear explicitly in cross section expressions. The next-to-leading order BK (Balitsky-Kovchegov) equation for the 2-point Wilson line correlator involves 6-point correlators of Wilson lines. These correlators are typically calculated only in the large-Nc limit. I will present a fully analytic calculation of these correlators in the finite Nc case, using the Gaussian Truncation. We use these results to find the relative importance of finite Nc corrections to the next-to-leading order evolution equation. We show numerically that the finite Nc corrections are negligible, as expected.

Track Initial State
Contribution type Contributed Talk

Primary author

Andrecia Ramnath (University of Jyvaskyla)


Prof. Tuomas Lappi (University of Jyväskylä) Heikki Mäntysaari (University of Jyväskylä)

Presentation materials