55 citations · 295 across the 51 of their papers we have counts for
24 papers · 1 filter
Wave-Packet Effects: A Solution for Isospin Anomalies in Vector-Meson Decay
Kenzo Ishikawa, Osamu Jinnouchi, Kenji Nishiwaki +1
There is a long-standing anomaly in the ratio of the decay width for to that for at the level of . A similar anomaly exis…
Topological interaction of neutrino with photon in the magnetic field -- Electroweak Hall effect
Kenzo Ishikawa, Yutaka Tobita
The effective interaction of a neutrino with a photon in magnetized plasma is obtained from a strong field expansion in the electroweak standard model. The interaction is expressed…
On Experimental Confirmation of the Corrections to the Fermi's golden rule
Kenzo Ishikawa, Osamu Jinnouchi, Arisa Kubota +3
Standards calculations by the Fermi's Golden rule involve approximations. These approximations could lead to deviations from the predictions of the standard model as discussed in a…
Particle decay in Gaussian wave-packet formalism revisited
Kenzo Ishikawa, Kin-ya Oda
We derive the Fermi's golden rule in the Gaussian wave-packet formalism of quantum field theory, proposed by Ishikawa, Shimomura, and Tobita, for the particle decay within a finite…
Interaction of the SN1987A Neutrino with the Galaxy
Kenzo Ishikawa, Terry Sloan, Yutaka Tobita
In previous publications we have shown that long-ignored approximations in standard model calculations could have significant implications for very low mass particles such as neutr…
Finite-size corrections to Fermi's Golden rule II: Quasi-stationary composite states
Kenzo Ishikawa, Yutaka Tobita
Many-body states described by a Schrödinger equation include states of overlapping waves of non-vanishing interaction energies. These peculiar states formed in many-body transition…
Electroweak Hall Effect of Neutrino and Coronal Heating
Kenzo Ishikawa, Yutaka Tobita
The inversion of temperature at the solar corona is hard to understand from classical physics, and the coronal heating mechanism remains unclear. The heating in the quiet region se…
Anomalous radiative transitions
Kenzo Ishikawa, Toshiki Tajima, Yutaka Tobita
Anomalous transitions involving photons derived by many-body interaction of the form, , in the standard model are studied. This does not affect the equation of moti…
Transition Probability for the Neutrino Wave in Muon Decay and Oscillation Experiments
Kenzo Ishikawa, Tasuku Nozaki, Masashi Sentoku +1
This paper elucidates the anomalous decay of the muon ascribed to extended waves. Due to a large overlap of the parent and daughters, the transition amplitude and probability for t…
On transition of non-stationary waves
Kenzo Ishikawa, Yutaka Tobita
The probability of the events that the final states are detected with or interact with the nucleus in a finite time interval T was found to be, . is c…
Finite-size corrections to Fermi's golden rule: I. Decay rates
Kenzo Ishikawa, Yutaka Tobita
A quantum mechanical wave of a finite size moves like a classical particle and shows a unique decay probability. Because the wave function evolves according to the Schrödinger equa…
Long-range correlations of neutrinos in hadron reactions and neutrino diffraction II: neutrino
Kenzo Ishikawa, Yutaka Tobita
In this II, a probability to detect the neutrino produced in a high-energy pion decay is shown to receive the large finite-size correction. The neutrino interacts extremely weakly…
A new method for measuring the absolute neutrino mass
Kenzo Ishikawa, Yutaka Tobita
The probability of the event that a neutrino produced in pion decay is detected in the intermediate shorter than the life-time , , is sensitive to the absolute…
Matter-enhanced transition probabilities in quantum field theory
Kenzo Ishikawa, Yutaka Tobita
The relativistic quantum field theory is the unique theory that combines the relativity and quantum theory and is invariant under the Poincaré transformation. The ground state, vac…
Diffraction-corrected neutrino flux and total cross section
Kenzo Ishikawa, Yutaka Tobita
A neutrino produced in a particle decay maintains an unusual wave nature that reveals a diffraction phenomenon in a large spatial region. Diffraction gives a new component to a neu…
Resolving LSND anomaly by neutrino diffraction
Kenzo Ishikawa, Yutaka Tobita
In the charged pion decay, a neutrino is produced in pair with a charged lepton and they have the same production rate. In this paper we show that neutrinos have their own space-ti…
Neutrino diffraction induced by many body interaction
Kenzo Ishikawa, Yutaka Tobita
The neutrino produced in the pion decay reveals a new diffraction phenomenon due to many-body interactions in an intermediate time region when wave functions of the parent and daug…
Long-range spatial correlation of neutrino in pion decay
K. Ishikawa, Y. Tobita
Position-dependent property of the neutrino produced in high-energy pion decay is studied theoretically using a wave packet formalism. It is found that the neutrino probability has…
Macroscopic Interferences of Neutrino Waves
K. Ishikawa, Y. Tobita
Interference phenomena of neutrinos are studied. High energy neutrino in T2K near detector and low energy neutrino in KamLAND are possible experiments that could show macroscopic i…
On coherence lengths of wave packets II : High energy neutrino
K. Ishikawa, Y. Tobita
In this second paper of the series on the coherence of wave packets, we study neutrinos in high energy experiments where neutrinos are produced by decays of pions or muons which ar…
Coherence length of cosmic background radiation enlarges the attenuation length of the ultra-high energy proton
Kenzo Ishikawa, Yutaka Tobita
It is pointed out that an agreement of the one particle energy spectrum of the cosmic background radiation (CMBR) with Plank distribution of 2.725 [K] does not give a strong constr…
Generalized S-matrix in Mixed Representations
Kenzo Ishikawa, Takashi Shimomura
A generalized scattering amplitude where momenta of incoming-particles and outgoing-particles as well as positions of incoming-particles and outgoing-particles are specified is for…
Coherent lunar effect on solar neutrino
K. Ishikawa, T. Shimomura
Coherent interaction of solar neutrino with the moon and its implication are investigated. We solve the Dirac equation with the moon potential and show that a phase shift of the ne…
Neutrino Oscillations in Intermediate States.II -- Wave Packets
A. Asahara, K. Ishikawa, T. Shimomura +1
We analyze oscillations of intermediate neutrinos in terms of the scattering of particles described by Gaussian wave packets. We study a scalar model as in a previous paper (I) but…