# Lepton mass effects in the Bethe-Heitler process

Abstract : We develop the full finite lepton mass formalism for the Bethe-Heitler reaction of unpolarized leptons off unpolarized nucleons. Genuine lepton mass effects are described, notably independent of the lepton mass or increasing with the initial beam energy and sensitive to the nucleon isospin. In the minimum momentum transfer region, these effects dominate the muon induced proton cross section and become significant for electron scattering at small $x_B$.
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Journal articles
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http://hal.in2p3.fr/in2p3-00823444
Contributor : Emmanuelle Vernay <>
Submitted on : Friday, May 17, 2013 - 8:09:30 AM
Last modification on : Thursday, November 19, 2020 - 12:58:47 PM

### Citation

M.B. Barbaro, C. Maieron, E. Voutier. Lepton mass effects in the Bethe-Heitler process. Physics Letters B, Elsevier, 2013, 726, pp.505-511. ⟨10.1016/j.physletb.2013.08.063⟩. ⟨in2p3-00823444⟩

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