22-28 July 2010
Palais des Congrès de Paris
Europe/Paris timezone

Direct photon production with effective field theory

24 Jul 2010, 09:00
17m
Salle 252B

Salle 252B

Parallel Session Talk 03 - Perturbative QCD, Jets and Diffractive Physics 03 - Perturbative QCD, Jets and Diffractive Physics

Speaker

Thomas Becher (University of Bern)

Description

The production of hard photons in hadronic collisions is studied using Soft-Collinear Effective Theory (SCET). This is the first application of SCET to a physical, observable cross section involving energetic partons in more than two directions. The final resummed inclusive direct photon distribution is valid to next-to-next-to-leading logarithmic order (NNLL), one order beyond previous work. The result is improved by including non-logarithmic terms and photon isolation cuts through matching, and compared to Tevatron data and to fixed order results at the Tevatron and the LHC. The resummed cross section has a significantly smaller theoretical uncertainty than the next-to-leading fixed-order result, particularly at high transverse momentum.

Primary author

Thomas Becher (University of Bern)

Co-author

Matthew Schwartz (Harvard University)

Presentation Materials