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          Institute: MPI für Kernphysik     Collection: Theoretical Quantum Dynamics     Display Documents



  history
ID: 299436.0, MPI für Kernphysik / Theoretical Quantum Dynamics
Muon pair creation from positronium in a circularly polarized laser field
Authors:Müller, Carsten; Hatsagortsyan, Karen Zaven; Keitel, Christoph Helmut
Language:English
Date of Publication (YYYY-MM-DD):2006-10-23
Title of Journal:Physical Review D
Journal Abbrev.:Phys. Rev. D
Volume:74
Start Page:1
End Page:16
Sequence Number of Article:074017
Copyright:©2006 The American Physical Society
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We study elementary particle reactions that result from the interaction of an atomic system with a very intense laser wave of circular polarization. As a specific example, we calculate the rate for the laser-driven reaction e+e--->µ+µ-, where the electron and positron originate from a positronium atom or, alternatively, from a nonrelativistic e+e- plasma. We distinguish accordingly between the coherent and incoherent channels of the process. Apart from numerical calculations, we derive by analytical means compact formulas for the corresponding reaction rates. The rate for the coherent channel in a laser field of circular polarization is shown to be damped because of the destructive interference of the partial waves that constitute the positronium ground-state wave packet. Conditions for the observation of the process via the dominant incoherent channel in a circularly polarized field are pointed out.
External Publication Status:published
Document Type:Article
Communicated by:C.H. Keitel
Affiliations:MPI für Kernphysik/ Group of C.H. Keitel/Relativistic Quantum Dynamics and High-Energy Processes (K. Hatsagortsyan)
Identifiers:DOI:10.1103/PhysRevD.74.074017
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