Landau-pomeranchuk-migdal effect on high-energy electron measurements with emulsion chambers

K. Yoshida, Y. Komori, K. Yanagisawa, T. Kobayashi, Y. Sato, J. Nishimura

研究成果: Conference contribution

抄録

We have performed high-energy electron observations using balloon-borne emulsion chambers, and derived the cosmic-ray electron spectrum in the energy range from 30 GeV to 3 TeV. For the calibration of the emulsion chambers, we have also carried out beam tests of 50 GeV, 200 GeV, and 250 GeV electrons at CERN-SPS. The Landau-Pomeranchuk-Migdal (LPM) effect predicts the reduction of amplitude for bremsstrahlung photon emission. It affects to the depth of the first electron-positron pair of the electron-induced shower, the so-called shower starting point. In the emulsion chambers, we can measure the shower starting points for high-energy electrons with the position resolution of 1 µm. From the observations of accelerator-beam electrons of 200 GeV and 250 GeV, and cosmic-ray electrons above 400 GeV, we found the direct evidence of suppression of the bremsstrahlung cross sections due to the LPM effect.

本文言語English
ホスト出版物のタイトルProceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
出版社Sociedade Brasileira de Fisica
ISBN(電子版)9788589064293
出版ステータスPublished - 2013 1 1
イベント33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil
継続期間: 2013 7 22013 7 9

出版物シリーズ

名前Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
2013-October

Other

Other33rd International Cosmic Rays Conference, ICRC 2013
CountryBrazil
CityRio de Janeiro
Period13/7/213/7/9

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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