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University of Cambridge > Talks.cam > HEP phenomenology joint Cavendish-DAMTP seminar > A new look for the pion form factor
![]() A new look for the pion form factorAdd to your list(s) Download to your calendar using vCal
If you have a question about this talk, please contact Nico Gubernari. In this talk, I will discuss a novel and simple parametrisation of meson form factors that can be used to describe data above and below the pair production threshold, using the pion form factor as a simple example (in which case our parameterisation describes both $\pi \to \pi^0$ and $0 \to \pi \pi$ processes). To start with, I will introduce and walk through the derivation of dispersive bounds on form factors, then explain the difficulties in the traditional approach with a description of the above threshold data due to resonant poles, and the known asymptotic properties of the form factor in this region. Using data from $\pi$-H scattering and the $\tau \to \pi \pi \nu$ decay, I will show how with less than 5 free parameters (including the rho mass and decay width), we can excellently describe the data. This talk is based on my work in arXiv:2410.13764. This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series. This talk is included in these lists:
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