[Halld-cpp] conference

[vtarasov at jlab.org]

Dear CPP Members,

I am planning to present an updated report at the 7th International
Conference on Particle Physics and Astrophysics (ICPPA-2024) in Moscow,
Russia this fall.
Below is the preliminary abstract of my talk. I would greatly appreciate
any comments or corrections you might have.

Thank you and best regards,
Victor


Measuring the Polarizabilities of Neutral and Charged Pions at JLab

The electric and magnetic polarizabilities of a particle describe its
response to external electric and magnetic fields.
The values of electric (alpha) and magnetic (beta) polarizabilities depend
on the "stiffness" of the particle's constituent bonds
and provide important information about its internal structure. As the
lightest bound state of QCD,
the pion's polarizability is measured to test Chiral Perturbation Theory
(ChPT) at low energies.

The polarizabilities of charged and neutral pions will be extracted from
experimental data obtained at Jefferson Lab.
This involves measuring the cross-section of pion pair production during
the interaction of a 4.5...6 GeV photon beam with a lead target via the
Primakoff effect.

This talk will cover existing measurements of pion polarizability and the
current state of the experiment at Hall D in Jefferson Lab.