Hansen HD, Uggerhøj UI, Biino C, Ballestrero S, Mangiarotti A, Sona P, Ketel TJ, Vilakazi ZZ. Is the electron radiation length constant at high energies?
PHYSICAL REVIEW LETTERS 2003;
91:014801. [PMID:
12906543 DOI:
10.1103/physrevlett.91.014801]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2003] [Indexed: 05/24/2023]
Abstract
Experimental results for the radiative energy loss of 149, 207, and 287 GeV electrons in a thin Ir target are presented. From the data we conclude that at high energies the radiation length increases in accordance with the Landau-Pomeranchuk-Migdal (LPM) theory and thus electrons become more penetrating the higher the energy. The increase of the radiation length as a result of the LPM effect has a significant impact on the behavior of high-energy electromagnetic showers.
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