K. Hidaka
Tokyo Gakugei University
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Publication
Featured researches published by K. Hidaka.
Physical Review D | 2000
H. Eberl; K. Hidaka; Sabine Kraml; W. Majerotto; Youichi Yamada
We improve the calculation of the supersymmetric
Physics Letters B | 1990
M. Honda; K. Kasahara; K. Hidaka; Shoichi Midorikawa
O(\alpha_s)
Physical Review D | 2002
A. Bartl; K. Hidaka; Werner Porod
QCD corrections to the decays of Higgs bosons into quarks and squarks in the Minimal Supersymmetric Standard Model. In the on-shell renormalization scheme these corrections can be very large, which makes the perturbative expansion unreliable. This is especially serious for decays into bottom quarks and squarks for large
European Physical Journal C | 2006
A. Bartl; K. Hidaka; K. Hohenwarter-Sodek; W. Majerotto; Werner Porod
\tan\beta
Physical Review D | 2004
A. Bartl; S. Hesselbach; K. Hidaka; Werner Porod
. Their corrected widths can even become negative. We show that this problem can be solved by a careful choice of the tree-level Higgs boson couplings to quarks and squarks, in terms of the QCD and SUSY QCD running quark masses, running trilinear couplings
Physical Review D | 1999
A. Bartl; H. Eberl; K. Hidaka; Sabine Kraml; W. Majerotto; W. Porod; Youichi Yamada
A_q
Physics Letters B | 1997
A. Bartl; H. Eberl; K. Hidaka; Tadashi Kon; W. Majerotto; Youichi Yamada
, and on-shell left-right mixing angles of squarks. We also present numerical results for the corrected partial decay widths for the large
Physics Letters B | 2003
A. Bartl; S. Hesselbach; K. Hidaka; Werner Porod
\tan\beta
Physics Letters B | 2002
A. Bartl; K. Hidaka; Werner Porod
case.
Physics Letters B | 1998
A. Bartl; H. Eberl; K. Hidaka; Sabine Kraml; W. Majerotto; W. Porod; Youichi Yamada
Abstract A detailed Monte Carlo simulation of neutrino fluxes of atmospheric origin is made taking into account the muon polarization effect on neutrinos from muon decay. There still remains a significant discrepancy between the calculated ( v e + v e ) ( v μ + v μ ) ratio and that observed by the Kamiokande group, which can be explained by three neutrino oscillations. However, the ratio evaluated at the Frejus site and the total event number calculated for IMB-1 show good agreement with the data. Comparing our result with the previous Monte Carlo calculation by Barr et al., we find that the two calculations agree within 20% for the magnitude of neutrino fluxes and 5% for the ( v e + v e ) ( v μ + v μ ) ratio.