About
I describe some of the computational challenges posed by handling photons in lattice QCD. In Euclidean space, amplitudes containing final-state photons are expressed in terms of hadronic correlation functions with a strong infrared weighting, which are hard to control. Secondly, including electromagnetic corrections in hadronic observables is mandatory once the percent level of precision is reached, and this leads to higher n-point functions that need to be computed efficiently. Thirdly, these corrections also lead to a renormalization of the QCD parameters. Two techniques to overcome these challenges will be described in more detail, the use of coordinate-space methods and choosing an ultraviolet cutoff for the photons that lies well below the lattice cutoff scale. .
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The talk
Credits and licence
- Institution
- CERN
- Department
- Theory Colloquia
- Speaker
- Harvey Meyer
- Year
- 2024
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed