Abstract

Chapter 7 considers \(e^-e^+\) bound states in \(D=1+1\) dimensions (QED2). The bound state equation is solved analytically in a general frame (Sect. 7.1). The gauge and Lorentz invariance of electromagnetic form factors is verified (Sect. 7.2). The electron distribution given by deep inelastic scattering is numerically evaluated in the rest frame of the target and shown to agree with an earlier result in the Breit frame. DIS has a sea contribution for \({x_{Bj}}\rightarrow 0\) (Sect. 7.3).

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