@article{a60700d9429948d0a79a019eb25072cf,
title = "Discovery of the repulsive energy shift of the kaonic hydrogen 1s state",
abstract = "The aim in this manuscript is to clarify the progress in understanding the nature of the {\=K}N interaction at the lowest energy, given by the recent kaonic hydrogen X-ray experiment at KEK [1]. We have observed a clear spectrum showing the kaonic hydrogen Kα line, for the first time. The analysis gives the repulsive energy shift to be ΔE(1s) = -323 ± 63(statistical) ± 11 (systematic) eV and the energy width to be Γ(1s) = 407 ± 208 ± 100 eV. This result is consistent with analyses of the previous low-energy scattering data and resolves the long-standing kaonic hydrogen puzzle.",
author = "M. Iwasaki and K. Bartlett and Beer, {G. A.} and Gill, {D. R.} and Hayano, {R. S.} and Ito, {T. M.} and L. Lee and G. Mason and Nakamura, {S. N.} and A. Olin and H. Outa and M. Salomon and R. Seki and T. Taniguchi and Terada, {T. P.} and G. Trayling and Y. Yamashita and S. Yen",
note = "Funding Information: Monbusyo, JSPS (Japan), NSERC (Canada), DOE and NSF (US). tpresent address: INFN-LNF, Via E. Fermi 40, I+ascati 00044, Italy *Present address: Department of Physics, University of Manitoba, Winnipeg, MB., Canada R3T2N2 SAlso at: Department of Physics and Astrophysics, California State University, Northridge, CA 91330 7Present address: Tokyo Metropolitan Adachi Nishi Senior High School, 5-7-l Kohoku Adachi, Tokyo 123, Japan. Funding Information: *This work is supported financially by KEK, the Grants-in-Aid for International Scientific Research of",
year = "1998",
month = aug,
day = "24",
doi = "10.1016/S0375-9474(98)00318-2",
language = "English",
volume = "639",
pages = "501c--510c",
journal = "Nuclear Physics A",
issn = "0375-9474",
publisher = "Elsevier",
number = "1-2",
}