Aleksandrs Aleksejevs
Aleksandrs Aleksejevs
My theoretical research is focused on the searches of the physics beyond the Standard Model (BSM) and study of the properties of hadrons using effective field theories through the computational modeling.
Besides the tremendous efforts on the side of Large Hadron Collider to search for BSM particles on the scale of few TeV, it is possible to perform complimentary searches of the BSM physics using high precision measurements in the parity violating low energy electron scattering. The precision electron-proton or electron-electron scattering asymmetry data measured in the experiments, such as Q-weak, or planned MOLLER experiment at Jefferson laboratory provide a unique opportunity to uncover if there are any new BSM particles do exist. This can be achieved by simply comparing experimental data with the theoretical predictions using the Standard Model as an input. Any inconsistency between theory and experiment will be a strong signal of physics beyond the Standard Model. Currently I am actively involved in the calculations of the parity-violating asymmetries with the highest theoretical precision possible within the Standard Model.
The electromagnetic polarizabilities of a particle characterize the dipole moments induced by the presence of an external electromagnetic field. They therefore constitute fundamental quantities which represent a measure of the rigidity, stiffness or resistance to deformation of the internal structure of this composite system upon imposition of an external electromagnetic field. One of the ways to study response of the hadron to an external electromagnetic field is through a Compton scattering. This allows us to extract fundamental response structure functions such as electric and magnetic polarizabilities, and thus obtain information about the hadron internal degrees of freedom. Values of these polarizabilities are key to understanding of the dynamics of hadron in the external electromagnetic field. For instance just a sign of magnetic polarizability will define whether hadron have paramagnetic or diamagnetic structure. In this project we perform a detailed study of the polarizabilities of all lowest in mass hadrons using newly developed Computations Hadronic Model.
Welcome to my site!
Physics is Everything!
Winter 2017:
Courses taught: