Alladi Ramakrishnan Hall

Fermions and higher spin

Kushal Chakraborty

IISER Bhopal

Scattering amplitudes are ubiquitous in QFT. Three-point functions, often
considered as fundamental building blocks of S-matrix elements in the
modern amplitude program, play a crucial role in the studies of higher
point scattering amplitudes. In this talk, we will explore the three-point
functions involving two massless fermions and one massive boson of
arbitrary integer spin. We use a group theoretic approach to classify all
such possible on-shell three-point functions in various spacetime
dimensions. Eventually, this leads us to constrain cubic interaction terms
in the Lagrangian.