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arXiv · 2308.07091

Coherently diffractive dissociation in electron-hadron collisions: from HERA to the future EIC

Tuomas Lappi·Anh Dung Le·Heikki Mäntysaari
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Abstract

We present numerical results on diffractive dissociation with large invariant mass diffractive final states in the scattering of an electron off a hadron. The diffractive large-mass resummation is performed using the nonlinear Kovchegov-Levin equation, taking into account running coupling corrections. For the scattering off the proton, a (modified) McLerran-Venugopalan amplitude is used as the initial condition for the nonlinear evolution, with free parameters being constrained by the HERA inclusive data. The results show a reasonable description of the HERA diffractive structure function data at moderately large diffractive mass when the impact parameter profile is constrained by the low-mass diffractive cross section data. The calculation is extended to nuclear scattering, where the initial condition is generalized from the proton case employing the optical Glauber model. The nonlinear large-mass resummation predicts a strong nuclear modification in diffractive scattering off a nuclear target in kinematics accessible at the future Electron-Ion collider.

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Tuomas Lappi, Anh Dung Le, Heikki Mäntysaari. 2023-08-14. Coherently diffractive dissociation in electron-hadron collisions: from HERA to the future EIC. https://arxiv.org/abs/2308.07091

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