Even at a very young age he followed news in the world of physics and was very excited when in 1942 he learned about the Alikhanian brothers’ expedition to Mount Aragats (Armenia) in order to search for protons in cosmic rays.

After that time Garibian dedicated himself to scientific research in Theoretical physics, in the fields of Quantum electrodynamics, Cosmic rays, and High energy particles.

He actively participated in the creation of the Yerevan Synchrotron and also in the establishment of high-altitude cosmic ray stations on Mount Aragats.

He also showed the feasibility of a functional Transition Raditation Detector (TRD) - a tool for identification of high energy ultrarelativistic particles.

As a starting point of his research, he used results published in the article written by Ginzburg and Frank in 1946, where the theoretical existence of transition radiation was predicted.

Due to this feature, x-ray transition radiation received immediate practical implementation, as it made it possible to identify ultra-relativistic charged particles and to measure their energies.

Those studies played a decisive role in prompting similar work throughout the world: in the Brookhaven National Laboratory (by prof. Luke Chia-Liu Yuan), at Stanford Accelerator, and in different research centers of Europe.