Quark Matter 2012

12-18 August 2012
US/Eastern timezone

Photon production in hot QCD plasmas at NLO and two-to-three processes

16 Aug 2012, 14:00
20m

Oral Presentation

Speaker

Derek Teaney (Stony Brook University)

Description

We determine the photon production rate at next to leading order, i.e. through order $g^2 m_D/T$. At leading order, photon production is determined by three processes: hard two-to-two collisions, collinear bremsstrahlung, and quark-conversions, i.e. a process where the incoming quark transfers almost all of its momentum to the produced photon and the final state quark is soft. At NLO, wider angle bremsstrahlung must be treated carefully, and the LPM suppressed leading order rate smoothly matches onto two-to-three processes. Similarly, asymmetric bremsstrahlung, when the photon carries a large momentum fraction of the incoming momentum and the final state quark is soft, must be smoothly matched onto the quark conversion process present at leading order. We carefully include these rates without double counting to determine the full photon production rate at NLO.

Primary author

Derek Teaney (Stony Brook University)

Co-authors

Dr Aleski Kurkela (McGill University) Prof. Guy Moore (McGill University) Dr Jacopo Ghiglieri (McGill University) Ms Juhee Hong (Stony Brook University)

 Slides

Paper files: