Publications [#248806] of Christopher Walter

Papers Published
  1. Fukuda, Y; Hayakawa, T; Ichihara, E; Inoue, K; Ishihara, K; Ishino, H; Itow, Y; Kajita, T; Kameda, J; Kasuga, S; Kobayashi, K; Kobayashi, Y; Koshio, Y; Miura, M; Nakahata, M; Nakayama, S; Okada, A; Okumura, K; Sakurai, N; Shiozawa, M; Suzuki, Y; Takeuchi, Y; Totsuka, Y; Yamada, S; Earl, M; Habig, A; Kearns, E; Messier, MD; Scholberg, K; Stone, JL; Sulak, LR; Walter, CW; Goldhaber, M; Barszczak, T; Casper, D; Gajewski, W; Kropp, WR; Price, LR; Reines, F; Smy, M; Sobel, HW; Vagins, MR et al., Measurement of the flux and zenith-angle distribution of upward throughgoing muons by Super-Kamiokande, Physical Review Letters, vol. 82 no. 13 (1999), pp. 2644-2648 .

    Abstract:
    A total of 614 upward throughgoing mouns of minimum energy 1.6 GeV are observed by Super-Kamiokande during 537 detector live days. The measured muon flux is [1.74 ± 0.07(stat) ± 0.02(sys)] × 10-13cm-2s-1sr-1 compared to an expected flux of [1.97 ± 0.44(theor)] × 10-13cm-2s-1sr-1. The absolute measured flux is in agreement with the prediction within the errors. However, the zenith-angle dependence of the observed upward throughgoing muon flux does not agree with no-oscillation predictions. The observed distortion in shape is consistent with the νμ ↔ ντ oscillation hypothesis with sin2 2θ > 0.4 and 1 × 10-3 < 1 × 10-1 < δm2 < 1 × 10-1 eV2 at 90% confidence level. © 1999 The American Physical Society.