Every result in modern particle physics, from the Higgs discovery, searches for dark matter, and investigations of the quark–gluon plasma, depends on simulated collisions. As the world’s most widely used Monte Carlo event generator for particle physics, PYTHIA, developed and maintained in Lund, has been a quiet but globally indispensable Swedish contribution to high-energy physics for...
The neutrino mass ordering (NMO) is one of the major contemporary questions in neutrino physics. Determining the NMO is the primary goal of the Jiangmen Underground Neutrino Observatory (JUNO), a recently operational next-generation reactor experiment. Furthermore, the advent of JUNO ushers in the precision era of neutrino oscillation physics. This enbales us, for the first time, to probe...
Focusing on supercooled PTs in models with classical scale symmetry, we investigate the limitations of derivative expansions in constructing a thermal EFT description for bubble nucleation. We show that derivative expansion for gauge field fluctuations diverges because the gauge field mass varies strongly between the high- and low-temperature phases. By computing the gauge fluctuation...
