Effective pion mass in the nuclear medium deduced from deeply bound pionic states in 207Pb

T. Yamazaki, R. S. Hayano, K. Itahashi, K. Oyama, A. Gillitzer, H. Gilg, M. Knülle, M. Münch, P. Kienle, W. Schott, W. Weise, H. Geissel, N. Iwasa, G. Münzenberg, S. Hirenzaki, H. Toki

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Abstract

Deeply bound Is states of π- as well as the 2p states in 207Pb were identified in the 208Pb(d,3He) reaction at 600 MeV. The binding energies of π- in 207Pb have been determined as Sπ(2p) = 5.31 ± 0.09 MeV and Bπ(1s) = 7.1 ± 0.2 MeV by comparing the observed Q-value spectrum with theory. These values indicate that the effective π- mass increases by 19.3 ± 2.7 MeV at the center of the 207Pb nucleus.

Original languageEnglish
Pages (from-to)246-251
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume418
Issue number3-4
DOIs
Publication statusPublished - 1998 Feb 5
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Yamazaki, T., Hayano, R. S., Itahashi, K., Oyama, K., Gillitzer, A., Gilg, H., Knülle, M., Münch, M., Kienle, P., Schott, W., Weise, W., Geissel, H., Iwasa, N., Münzenberg, G., Hirenzaki, S., & Toki, H. (1998). Effective pion mass in the nuclear medium deduced from deeply bound pionic states in 207Pb. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 418(3-4), 246-251. https://doi.org/10.1016/S0370-2693(97)01408-1