PPC 2023: XVI International Conference on Interactions between Particle Physics and Cosmology

Higher-order initial state radiation in e+e− annihilation

13 Jun 2023, 18:10

20m

305 (IBS Science and Culture Center)

Collider Physics Parallel: Collider Physics

Speaker

Uliana Voznaya (JINR)

Description

The studies of high-energy physics processes at future high-luminosity electron-
positron colliders require very precise calculations of QED radiative corrections for construction of sufficiently accurate theoretical predictions of these processes. The bulk of effect is provided by higher-order radiative corrections enhanced by the so-called large
logarithm $L=\ln \left(\frac{{\mu }^2}{m_e^2}\right)$ which depends on the factorization energy scale $\mu >>m_e$.
Radiative corrections in the leading and next-to-leading logarithmic approximations can be analytically calculated within the QED parton distribution functions approach. To calculate higher-order corrections we solve QED evolution equations by iterations. We calculated radiative corrections to the cross-section of electron-positron annihilation up to $O({\alpha }^3{L}^2)$ using this method. The results are relevant for physical programs of future high-energy electron-positron colliders including searches for dark matter.

Presentation materials

PPC-Voznaya.pdf