LGRT 419B
The gamma-boson exchange diagram plays an important role in a number of different areas of nuclear and particle physics. Two-photon exchange in elastic lepton-nucleon scattering is believed to become large at high momentum transfers to explain a large discrepancy in the proton elastic form factor determination. The gamma-Z box diagram is a significant contribution to the asymmetry in parity-violating electron scattering. Finally, the gamma-W diagram enters into beta-decays which are used to constrain fundamental elements of the Standard Model.
The purpose of the workshop is to bring together both theorists and experimentalists in these different areas to improve our understanding of this important process. An important focus will be on the interplay between the gamma-boson exchange contributions to different electroweak observables and the opportunities to exploit measurements to calibrate theoretical predictions. We hope to develop a roadmap for theory and experiment through a set of informal talks and discussions.
Co-organizers
Jan Bernauer, Massachusetts Institute of Technology
Doug Hasell, Massachusetts Institute of Technology
Michael Kohl, Hampton U & Jefferson Lab
Richard Milner, Massachusetts Institute of Technology
Michael Ramsey-Musolf, UMass Amherst
Schedule
9:00am |
9:15am |
10:00am |
10:45am |
11:15am |
12:00pm |
12:30pm |
2:00pm |
Overview of two-photon and two-boson exchange
Peter Blunden University of Manitoba ![]() |
2:30pm |
Two-Photon Theory: Inelastic Effects and Partonic Approach
Andrei Afanasev George Washington University ![]() |
3:00pm |
Two-Photon Exchange Calculations Versus Data
Oleksandr Tomalak Mainz University ![]() |
3:30pm |
4:00pm |
5:00pm |
6:30pm |
9:00am |
The Current Evaluation of V_{ud} and the Role Played by Radiative Corrections
John Hardy Texas A&M University ![]() |
9:45am |
Parity-Violating and Parity-Conserving Asymmetries in ep and eN Scattering in the Qweak Experiment
Wouter Deconinck William and Mary ![]() |
10:30am |
11:00am |
Dispersion Corrections to Hadronic Weak Charges
Misha Gorshteyn Mainz University ![]() |
11:30am |
Dispersive Approach to the Gamma-W Box Diagram in Beta Decay
Chien Yeah Seng Shanghai Jiao Tong University ![]() |
12:00pm |
12:30pm |
2:00pm |
2:30pm |
Searching for Tensor Currents by Detection of Cyclotron Radiation
Alejandro Garcia University of Washington ![]() |
3:00pm |
Measurements of Beta Energy Spectra in Gamow-Teller Decays
Oscar Naviliat Cuncic Michigan State University ![]() |
3:30pm |
4:00pm |
5:00pm |
6:30pm |
9:00am |
9:30am |
Baryon Chiral Perturbation Theory for the Two-boson Exchange Graph
Vadim Lensky Mainz University ![]() |
10:00am |
RC's to ep scattering and the Weak mixing angle
Kyle Shiells University of Manitoba ![]() |
10:15am |
Using the Qweak Apparatus to Probe the Gamma Z Box
Jim Dowd Jefferson Lab/ William and Mary ![]() |
10:30am |
11:00am |
11:30am |
12:00pm |
Close Out
All Participants |