arXiv subjects

Satoshi Yajima

Publications and source records attributed to Satoshi Yajima.

3 recordsLinked to original sources

arXiv2018

Gauge anomaly with vector and axial-vector fields in six dimensional curved space

Imposing the conservation equation of the vector current for a fermion of spin $\frac{1}{2}$ at the quantum level, a gauge anomaly for the fermion coupling with non-Abelian vector and axial--vector fields in six--dimensional curved space is expressed in tensorial form. The anomaly consists of terms that resemble the chiral U(1) anomaly and the commutator terms that disappear if the axial--vector field is Abelian.

hep-th↗

arXiv2014

Generalized BF state in quantum gravity

The BF state is known as a simple wave function that satisfies three constraints in canonical quantum gravity without a cosmological constant. It is constructed from a product of the group delta functions. Applying the chiral asymmetric extension, the BF state is generalized to the state for real values of the Barbero-Immirzi parameter.

gr-qc↗

arXiv2002

Analytical calculations of four-neutrino oscillations in matter

We analytically derive transition probabilities for four-neutrino oscillations in matter. The time evolution operator giving the neutrino oscillations is expressed by the finite sum of terms up to the third power of the Hamiltonian in a matrix form, using the Cayley-Hamilton theorem. The result of computation for the probabilities in some mass patterns tells us that it is realistically difficult to observe the resonance between one of three active neutrinos and the fourth (sterile) neutrino near the earth, even if the fourth neutrino exists.

hep-ph↗