Covariant helicity amplitude analysis for the process of J/ψ →γPP is discussed.Starting from the S- matrix elements of decay process,we deduce the formulae o
Several models in noncommutative geometry (NCG) with mild changes to the standard model are introduced to discuss the neutrino mass problem. We use two constrai
We show that the nonlinear equation governing wave propagation in a loss fibre system considered byNakkeeran in J. Phys. A34 (2001) 5111 can be brought into the
The scalar and vector running coupling constants are derived using the renormalization group method in the σ-ω model. The numerical values of the two running
We study the finite-size scaling behavior of velocity and central charge for different coupling constantsand different phases in (1+1)-dimensional lattice model