Understanding the Forward Muon Deficit in Coherent Pion Production
Abstract
Description
For any inelastic process $v_{\ell} + I \to \ell^- + F$ with $m_{\ell} = 0$, the cross section at $θ_{\ell} = 0$ is given by Adler's PCAC theorem. Inclusion of the lepton mass has a dynamical effect (``PCAC-screening'') caused by interference of spin-zero ($π^+$) and spin-one exchanges. This effect may be relevant to the forward suppression reported in recent experiments.
3 pages, 2 figures, presented at NuInt07, Fermilab, may 31 - june 3 2007
3 pages, 2 figures, presented at NuInt07, Fermilab, may 31 - june 3 2007