ALP-PHOTON INTERACTION IN THE STELLAR ENVIRONMENT

The spin zero, very light bosons like pseudoscalar axion, scalar dilaton are collectively grouped into the term axion-like particle (ALP). These ellusive particles qualify as candidates for dark matter. ALPs also show their presence in higher dimensional theories, as K.K. particles in Kaluza Klein theory, moduli in string theory and chameleons in cosmology. They can interact with the photon via dimension-five coupling. In this text we provide an alternative method for investigating the signatures of the dark matter candidate particles (i.e., ALP) by estimating the expressions of the probabilities of conversion between different degrees of freedom of interacting photon into ALP and into each other in presence of a stellar magnetized background. We have also tried to explain the contributions of pseudoscalar ALP-photon mixing to the luminosity function of stars like red giant, supergiants, white dwarfs etc.