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arXiv · 1910.03533

Bethe phase including proton excitations

V. A. Khoze·A. D. Martin·M. G. Ryskin
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Abstract

We evaluate the contribution of inelastic intermediate states (such as $p\to N^*$ excitations) to the phase between the one-photon-exchange and the `nuclear' high energy $pp$ scattering amplitudes as $t\to 0$, caused by multiphoton diagrams. It turns out to be rather small - much smaller than to have any influence on the experimental accuracy of the measurements of $\rho$, defined to be the ratio of the real to imaginary parts of the forward `nuclear' amplitude.

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V. A. Khoze, A. D. Martin, M. G. Ryskin. 2019-10-08. Bethe phase including proton excitations. https://doi.org/10.1103/physrevd.101.016018

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