Overview
Syllabus
Intro
AIM OF MY LECTURES: UNDERSTAND THIS PLOT
OUTLINE LECTURE 1
THRESHOLD FOR PAIR PRODUCTION
CROSS SECTION FOR PAIR PRODUCTION
BACKGROUND RADIATION FIELDS
EBL MEASUREMENTS
INGREDIENTS TO THE EBL: STARS
ADDITIONAL CONTRIBUTIONS?
EBL MODELS
OPTICAL DEPTH
CONSTRAINING THE EBL WITH GAMMA-RAY OBSERVATIONS
MODEL THE EBL INGREDIENTS DIRECTLY
CONCLUSIONS y-RAY ABSORPTION
PARITY TRANSFORMATION
CHARGE-PARITY
AXION SOLVES THE STRONG CP PROBLEM
AXIONLIKE PARTICLES (ALPs)
EVOLUTION OF AXION/ALP FIELD IN AN EXPANDING UNIVERSE
THE AXION / ALP PARAMETER SPACE
Taught by
ICTP-SAIFR