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Gamma-radiation as a Signature of Ultra Peripheral Ion Collisions at LHC energies

Yu. V. Kharlov·V. L. Korotkikh
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Abstract

We study the peripheral ion collisions at LHC energies in which a nucleus is excited to the discrete state and then emits $γ$-rays. Large nuclear Lorenz factor allows to observe the high energy photons up to a few ten GeV and in the region of angles of a few hundred micro-radians around the beam direction. These photons can be used for tagging the events with particle production in the central rapidity region in the ultra-peripheral collisions. For that it is necessary to have an electromagnetic detector in front of the zero degree calorimeter in the LHC experiments.

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Yu. V. Kharlov, V. L. Korotkikh. 2004-01-13. Gamma-radiation as a Signature of Ultra Peripheral Ion Collisions at LHC energies. https://doi.org/10.1140/epja%2Fi2004-10008-x

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