High-Energy Physics & RIKEN Theory Seminar

"Mixed EW-QCD two-loop amplitudes for Drell-Yan dilepton production"

Presented by Andreas von Manteuffel, MSU

Thursday, March 4, 2021, 11:00 am — Videoconference / Virtual Event (see link below)

Abstract: Drell-Yan production of a charged lepton pair is a key process at the Large Hadron Collider. The region of large invariant mass region is of particular interest for new physics searches, which motivates precise theory predictions at energies well above the Z resonance. In this talk, I discuss our recent calculation of the mixed electroweak-QCD two-loop amplitudes for the process qq->l+l- as a further step in this direction. I present the calculation in two different approaches, the 't Hooft-Veltman-Breitenlohner-Maison (HVBM) gamma5 scheme and Kreimer's anticommuting gamma5 scheme, and discuss how one arrives at scheme-independent results. Solving the master integrals in terms of multiple polylogarithms of algebraic arguments, we obtain fully analytic results for the helicity amplitudes, which allow for fast and robust numerical evaluations in Monte-Carlo programs.

Hosted by: Julia Gehrlein

Join Videoconference More Information

16214  |  INT/EXT  |  Events Calendar


Not all computers/devices will add this event to your calendar automatically.

A calendar event file named "calendar.ics" will be placed in your downloads location. Depending on how your device/computer is configured, you may have to locate this file and double click on it to add the event to your calendar.

Event dates, times, and locations are subject to change. Event details will not be updated automatically once you add this event to your own calendar. Check the Lab's Events Calendar to ensure that you have the latest event information.