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arXiv · 1309.5765

Experimental investigation of the Landau-Pomeranchuk-Migdal effect in low-Z targets

K. K. Andersen·S. L. Andersen·J. Esberg·H. Knudsen·R. E. Mikkelsen·U. I. Uggerhøj·T. N. Wistisen·P. Sona·A. Mangiarotti·T. J. Ketel
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Abstract

In the CERN NA63 collaboration we have addressed the question of the potential inadequacy of the commonly used Migdal formulation of the Landau-Pomeranchuk-Migdal (LPM) effect by measuring the photon emission by 20 and 178 GeV electrons in the range 100 MeV - 4 GeV, in targets of LowDensityPolyEthylene (LDPE), C, Al, Ti, Fe, Cu, Mo and, as a reference target, Ta. For each target and energy, a comparison between simulated values based on the LPM suppression of incoherent bremsstrahlung is shown, taking multi-photon effects into account. For these targets and energies, we find that Migdal's theoretical formulation is adequate to a precision of better than about 5%, irrespective of the target substance.

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K. K. Andersen, S. L. Andersen, J. Esberg, H. Knudsen, R. E. Mikkelsen, U. I. Uggerhøj, T. N. Wistisen, P. Sona, A. Mangiarotti, T. J. Ketel. 2013-09-23. Experimental investigation of the Landau-Pomeranchuk-Migdal effect in low-Z targets. https://doi.org/10.1103/physrevd.88.072007

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