101 citations · 534 across the 15 of their papers we have counts for
13 papers · 1 filter
CP-violating top-Higgs coupling in SMEFT
Vernon Barger, Kaoru Hagiwara, Ya-Juan Zheng
The total cross section of the process has strong dependence on the CP phase of the top Yukawa coupling, where the ratio of and …
Update of g-2 of the muon and Delta alpha
T. Teubner, K. Hagiwara, R. Liao +2
We update our Standard Model predictions for g-2 of the muon and for the hadronic contributions to the running of the QED coupling, Delta alpha^5_had(M_Z^2). Particular emphasis is…
Calculation of HELAS amplitudes for QCD processes using graphics processing unit (GPU)
K. Hagiwara, J. Kanzaki, N. Okamura +2
We use a graphics processing unit (GPU) for fast calculations of helicity amplitudes of quark and gluon scattering processes in massless QCD. New HEGET ({\bf H}ELAS {\bf E}valuatio…
Scalar charmonium and glueball mixing in
S. Dulat, K. Hagiwara, Z. -H. Lin
We study the possibility of the scalar charmonium and glueball mixing in annihilation at GeV. The effects can be used to explain the unexpected large cros…
On the possibility of a very light A^0 at low \tanβ
A. G. Akeroyd, S. Baek, Gi-Chol Cho +1
The searches at LEP II for the processes e^+e^-\to h^0Z and e^+e^-\to h^0A^0 in the Minimal Supersymmetric Standard Model (MSSM) fail to exclude regions of the m_h,m_A plane where…
Prospects of Very Long Base-Line Neutrino Oscillation Experiments with the KEK-JAERI High Intensity Proton Accelerator
M. Aoki, K. Hagiwara, Y. Hayato +4
We study physics potential of Very Long Base-Line (VLBL) Neutrino-Oscillation Experiments with the High Intensity Proton Accelerator (HIPA), which will be completed by the year 200…
Prospects of Very Long Base-Line Neutrino Oscillation Experiments with the JAERI-KEK High Intensity Proton Accelerator
M. Aoki, K. Hagiwara, Y. Hayato +4
In this paper, we discuss physics potential of the Very Long Base-Line (VLBL) Neutrino-Oscillation Experiments with the High Intensity Proton Accelerator (HIPA), which is planned t…
Prospects of Measuring General Higgs Couplings at e^+e^- Linear Colliders
K. Hagiwara, S. Ishihara, J. Kamoshita +1
We examine how accurately the general HZV couplings, with V=Z,gamma, may be determined by studying e^+e^- --> Hff-bar processes at future e^+e^- linear colliders. By using the opti…
Supersymmetry versus precision experiments revisited
Gi-Chol Cho, Kaoru Hagiwara
We study constraints on the supersymmetric standard model from the updated electroweak precision measurements --- the Z-pole experiments and the -boson mass measurements. The su…
Quark and Lepton Flavor Mixings in the SU(5) Grand Unification Theory
K. Hagiwara, N. Okamura
We explain the imbalance of the flavor mixing angles between the quark and the lepton sectors in the context of the SU(5) GUT with the see-saw mechanism. The quark masses and the C…
CP Violation in
S. Y. Choi, K. Hagiwara, M. Tanabashi
We consider CP violating effects in the decays where both the resonance, , and resonance, , can co…
Singe Top Production at LEP 200
K. Hagiwara, M. Tanaka, T. Stelzer
We present exact tree level cross sections for the single top production process at LEP~200. The results reproduce roughly those obtain…
Probing the Scalar Sector in
K. Hagiawara, M. L. Stong
We study possible deviations from the Standard Model in the reaction , where denotes a spinless neutral boson. We show how the decay angular correlation can…