β Decays of Nucleons and Quarks Embedded in the Nucleus

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概要

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• The β-ray angular distributions from purely spin aligned ^12B and ^12N nuclei were precisely remeasured to determine a new limit of the G-parity irregular induced tensor form factor in weak nucleon axial vector currents and to study the in-medium mass renormalization of nucleons through the axial charge. A more reliable result on the induced tensor term was obtained as -0.31 ≤ 2Mf_T/f_A ≤ 0.02 at a 90% confidence level. This result is consistent with the theoretical prediction in the framework of which the form factor is proportional to the mass difference between the up and down quarks. The axial charge of the axial vector current was determined to be y = 4.9 ± 0.10, which may disclose an in-medium mass reduction of the decaying nucleon of (16 ± 4)% at a 90% confidence level.

• 理論物理学刊行会の論文
• 2002-12-26

著者

• MORITA MASATO

  Department of Anesthesiology and Medical Crisis Management, Nagoya City University Graduate School o

• Koshigiri Kunio

  Department Of Physics Osaka Kyoiku University

• Morita M

  Osaka Univ. Toyonaka Jpn

• Morita Masato

  Department Of Anesthesiology And Medical Crisis Management Nagoya City University Graduate School Of

• FUKUDA Mitsunori

  Department of Physics, Graduate School of Science, Osaka University

• MATSUTA Kensaku

  Department of Physics, Graduate School of Science, Osaka University

• MINAMISONO Tadanori

  Department of Physics, Graduate School of Science, Osaka University

• Morita M

  Department Of Physics Josai International University

• Koshigiri K

  Department Of Physics Osaka Kyoiku University

• MINAMISONO Tadanori

  Graduate School of Science, Osaka University

• MINAMISONO Kei

  Graduate School of Science, Osaka University

• MATSUTA Kensaku

  Graduate School of Science, Osaka University

• FUKUDA Mitsunori

  Graduate School of Science, Osaka University

• MIHARA Mototsugu

  Graduate School of Science, Osaka University

• Minamisono Kei

  Graduate School Of Science Osaka University

• Matsuta Kensaku

  Department Of Physics Tokyo University Of Science

• Miki Masami

  Department Of Earth & Space Science Graduate School Of Science Osaka University

• Minamisono Tadanori

  Department Of Physics Graduate School Of Science Osaka University

• Mihara Mototsugu

  Department Of Physics Graduate School Of Science Osaka University

• Minamisono Tadanori

  Graduate School Of Science Osaka University

• Mihara Mototsugu

  Graduate School Of Science Osaka University

• Fukuda M

  Graduate School Of Science Osaka University

• Miki Masami

  Department of Earth & Space Science, Graduate School of Science, Osaka University

• FUKUDA Masahiro

  NAL-YAMAGATA Collaboration : Computational Sciences Division, National Aerospace Laboratory

• Matsuda Kensaku

  Graduate School of Science, Osaka University

• MORITA Masato

  Department of Physics, Josai International University

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