Conveners
R2-4 Testing Fundamental Symmetries II (DTP/PPD/DNP) | Tests de symétries fondamentales II (DPT/PPD/DPN)
- Tom Steele (U of Saskatchewan)
The Standard Model breaks electroweak symmetry using an isospin-doublet scalar Higgs field, i.e. a field in the minimal nontrivial representation of SU(2)_L. But there could in principle be contributions to the vacuum condensate from "exotic" scalars in higher isospin representations. Such exotic models are in general strongly constrained by electroweak precision measurements, which I'll use...
Precision measurements of electric dipole moments (EDMs) of the neutron, atoms and molecules constitute important tests for new sources of CP violation in nature. Given the empirical motivation for new physics in a hidden (or dark) sector, notably arising from the need to explain dark matter and neutrino, I'll discuss the implications of this scenario for EDM measurements and the...
The CKM matrix of the Standard Model (SM) is a unitary $3\times3$ matrix which holds information on how strongly the various quark flavours couple to each other. Consequently, nature’s adherence to the SM can be tested by the normalization condition of its rows. $|V_{ud}| = 0.97417(21)$ is a dominant term in the first row unitarity condition: $|V_{ud}|^2 + |V_{us}|^2 + |V_{ub}|^2 = 1$, and...
We use QCD Laplace sum rules to generate mass predictions for vector cc and bb diquarks. We calculate the diquark correlator within the operator product expansion to next to leading order, including terms proportional to the four- and six-dimensional gluon and six-dimensional quark condensates. Using these diquark masses as input, a potential model is used to predict the masses of tetraquark...