Can a 60% in 12th arts student gain admission to a BA program at DAV College, Chandigarh?

You can definitely apply, whether you will get admission or not, it depends on the availability of seats. Many times, students leave their seats for better colleges. This way seats are vacated and made available for students who didn’t get admission during counseling. 

The number of seats for the BA program at DAV College has been reduced a few years back. The required cutoff may be higher. I will suggest that you fill the form and wait for the cutoff list.