“Symmetry is an online magazine about particle physics and its connections to other aspects of life and science, from interdisciplinary collaborations to policy to culture. It is published by Fermi National Accelerator Laboratory and SLAC National Accelerator Laboratory, both national laboratories funded by the Office of Science of the US Department of Energy. [Masthead]
The home page may have some articles you’ll find interesting and understandable. Select the “science topics” tab to look for articles on a particular topic. Under “departments”, “signal to background” seems to provide a good variety of items.