Speaker
Description
In this talk, we present results from analyzing pseudorapidity-binned charged-particle multiplicity distributions from proton-proton collisions at center-of-mass energies from 0.9 to 13 TeV, using data from the ATLAS experiment. For each multiplicity distribution, we compute the associated Shannon entropy to quantify the complexity of the final state. Surprisingly, we find that the entropy remains approximately constant across a wide range of energies and multiplicities, even as the total number of charged particles increases. To better understand this behavior, we define a quantity called the “entropy scaling coefficient,” which systematically decreases with multiplicity. Our results suggest a form of universal information structure in high-energy QCD final states, offering a complementary perspective to standard analyses in collider phenomenology.