Reggeization of the Pion Exchange in Pion Photoproduction
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Universitat de Barcelona (Spain)
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Indiana Univ., Bloomington, IN (United States)
At high energies, the production of light mesons induced by a photon beam interacting with a nucleon target is governed by the exchange of Regge trajectories in the t-channel. In charge-exchange reactions at small momentum transfer, unnatural parity exchanges, such as pion exchange, dominate. The point-like nature of the photon–pion interaction makes the pion photoproduction reaction an excellent way to study the pion exchange mechanism. However, the nucleon Born terms are required to ensure that the scattering amplitude is gauge invariant. The gauge invariance of the pion exchange amplitude is crucial in approaching its reggeization properly. Here we discuss a novel strategy to reggeize the pion pole which considers explicitly the exchange in the t-channel of all the mesons in the pion trajectory. Each of these exchanges contributes with a pole in spin, known as a Regge pole, and we perform their summation analytically.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- AC05-06OR23177; FG02-87ER40365; SC0023598
- OSTI ID:
- 2560770
- Report Number(s):
- JLAB-THY--24-4006; DOE/OR/23177-7432
- Journal Information:
- Acta Physica Polonica. Series B, Proceedings Supplement, Journal Name: Acta Physica Polonica. Series B, Proceedings Supplement Journal Issue: 6 Vol. 17; ISSN 1899-2358
- Publisher:
- Jagiellonian UniversityCopyright Statement
- Country of Publication:
- United States
- Language:
- English