Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-05-10
Phys.Rev. D70 (2004) 056005
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages
Scientific paper
10.1103/PhysRevD.70.056005
We examine the process of Compton scattering, in the presence of a Lorentz- and CPT-violating modification to the structure of the electron. We calculate the complete tree-level contribution to the cross section; our result is valid to all orders in the Lorentz-violating parameter. We find a cross section that differs qualitatively from the Klein-Nishina result at small frequencies, and we also encounter a previously undescribed complication that will arise in the calculation of many Lorentz-violation cross sections: The Lorentz violation breaks the spin degeneracy of the external states, so we cannot use a closure relation to calculate the unpolarized cross section.
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