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

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

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

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

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.

Original language	English
Title of host publication	Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
Publisher	Sociedade Brasileira de Fisica
ISBN (Electronic)	9788589064293
Publication status	Published - 2013 Jan 1
Event	33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil Duration: 2013 Jul 2 → 2013 Jul 9

Publication series

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

Other

Other	33rd International Cosmic Rays Conference, ICRC 2013
Country	Brazil
City	Rio de Janeiro
Period	13/7/2 → 13/7/9

Keywords

Balloon
Electron
Emulsion chambers
LPM effect

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Cite this

Yoshida, K., Komori, Y., Yanagisawa, K., Kobayashi, T., Sato, Y., & Nishimura, J. (2013). Landau-pomeranchuk-migdal effect on high-energy electron measurements with emulsion chambers. In Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013; Vol. 2013-October). Sociedade Brasileira de Fisica.

Landau-pomeranchuk-migdal effect on high-energy electron measurements with emulsion chambers. / Yoshida, K.; Komori, Y.; Yanagisawa, K.; Kobayashi, T.; Sato, Y.; Nishimura, J.

Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Sociedade Brasileira de Fisica, 2013. (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013; Vol. 2013-October).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Yoshida, K, Komori, Y, Yanagisawa, K, Kobayashi, T, Sato, Y & Nishimura, J 2013, Landau-pomeranchuk-migdal effect on high-energy electron measurements with emulsion chambers. in Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013. Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013, vol. 2013-October, Sociedade Brasileira de Fisica, 33rd International Cosmic Rays Conference, ICRC 2013, Rio de Janeiro, Brazil, 13/7/2.

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abstract = "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.",

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AU - Yoshida, K.

AU - Komori, Y.

AU - Yanagisawa, K.

AU - Kobayashi, T.

AU - Sato, Y.

AU - Nishimura, J.

PY - 2013/1/1

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N2 - 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.

AB - 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.

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KW - Electron

KW - Emulsion chambers

KW - LPM effect

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