Anomalous Sudakov form factors

DOI10.1007/JHEP03(2010)072zbMATH Open1271.81195arXiv0909.1657MaRDI QIDQ364965

Author name not available (Why is that?)

Publication date: 3 September 2013

Published in: (Search for Journal in Brave)

Abstract: While radiative corrections of infrared origin normally depress high energy amplitudes (Sudakov form factors), we find that in some cases resummation of leading effects produces exponentials with positive exponents, giving rise to amplitudes that grow indefinitely with energy. The effect happens in broken gauge theories like the electroweak sector of the Standard Model, and is related to the existence of amplitudes that do not respect the gauge symmetry, and that contrary to expectations do not vanish in the very high energy limit, but rather become dominant. As a working example we consider a model with two chiral abelian gauge groups $U^{\prime }(1)otimesU(1)$ with large mass splitting $M_{Z^{\prime }}gg{M}_Z$, and we compute leading radiative corrections corrections to the decay of the heavy extra $Z^{\prime }$ boson into light fermions. For proper fermionic charges, the chirality breaking magnetic dipole moment, although mass suppressed, becomes the dominant contribution to the $Z^{\prime }$ width at very high energies.

Full work available at URL: https://arxiv.org/abs/0909.1657

zbMATH Keywords

No records found.

Mathematics Subject Classification ID

No records found.

This page was built for publication: Anomalous Sudakov form factors

Report a bug (only for logged in users!)Click here to report a bug for this page (MaRDI item Q364965)