Electron-Positron Pair Production in the Deep Quantum Regime

Electron-positron pair production via real and virtual photons is signi cant to the design of linear colliders, especially in the deep quantum regime (i.e., beamstrahlung parameter >> 1). In this regime, pair production via a virtual photon (the trident process) can become comparable in rate to pair production via a real beamstrahlung photon. We derive characteristics of the e+epairs produced via the trident process, using the quasi-classical approach of Baier, Katkov, and Strakhovenko. We have also examined some of the implications of e+epair production for the design of very high energy (several TeV in the center of mass) linear colliders in the deep quantum regime. Presented at 8th Workshop on Advanced Accelelerator Concepts, Baltimore, Maryland, July 5-11, 1998 Work supported by Department of Energy contract DE{AC03{76SF00515. Electron-Positron Pair Production in the Deep Quantum Regime Kathleen A.Thompson and Pisin Chen Stanford Linear Accelerator Center, MS 26, P.O.Box 4349, Stanford, CA 94309, USA E-mail: [email protected] Abstract. Electron-positron pair production via real and virtual photons is significant to the design of linear colliders, especially in the deep quantum regime (i.e., beamstrahlung parameter >> 1). In this regime, pair production via a virtual photon (the trident process) can become comparable in rate to pair production via a real beamstrahlung photon. We derive characteristics of the e+epairs produced via the trident process, using the quasi-classical approach of Baier, Katkov, and Strakhovenko [1]. We have also examined some of the implications of e+epair production for the design of very high energy (several TeV in the center of mass) linear colliders in the deep quantum regime, both in this paper and elsewhere [2]. Electron-positron pair production via real and virtual photons is significant to the design of linear colliders, especially in the deep quantum regime (i.e., beamstrahlung parameter >> 1). In this regime, pair production via a virtual photon (the trident process) can become comparable in rate to pair production via a real beamstrahlung photon. We derive characteristics of the e+epairs produced via the trident process, using the quasi-classical approach of Baier, Katkov, and Strakhovenko [1]. We have also examined some of the implications of e+epair production for the design of very high energy (several TeV in the center of mass) linear colliders in the deep quantum regime, both in this paper and elsewhere [2].