Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-10-25
Phys.Rev.D51:2295-2301,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex, 17 pages + 6 figures (available upon request), Preprint, OITS559. Several typos with tex file were corrected
Scientific paper
10.1103/PhysRevD.51.2295
We study amplitude zeros in radiative decay processes with a photon or a gluon emission of all possible scalar particles(e.g. scalar leptoquarks) which may interact with the usual fermions in models beyond the standard model. For the decays with a photon emission, the amplitudes clearly exhibit the factorization property and the differential decay rates vanish at specific values of a certain variable which are determined only by the electric charges of the particles involved and independent of the particle masses and the various couplings. For the decays with a gluon emission, even though the zeros are washed away, the differential decay rates still have distinct minima. The branching ratios as a function of leptoquark masses are presented for the scalar leptoquark decays. We also comment on the decays of vector particles into two fermions and a photon.
Deshpande
He
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