# Multi-hadron transition rates from lattice QCD

#### Multi-hadron transition rates from lattice QCD

- Event time: 2:00pm
- Event date: 17th January 2018
- Speaker: Maxwell T. Hansen (University of Mainz)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB

### Event details

In the late 1960s, deep-inelastic scattering experiments, in which high energy leptons scatter off protons or other hadronic targets, proved crucial in solidifying our understanding of QCD as the quantum theory of the strong force. In such scattering events many hadrons are produced in the final state, but by considering inclusive rates (summed over the final states) one can define simpler observables that are described remarkably well by the underlying theory. However, as the energy is lowered into the regime of QCD resonances, the high-energy description breaks down and predictions become very challenging. The numerical technique of lattice QCD (LQCD), which has proven very successful in studying other low-energy quantities, should also play an important role in reaching a comprehensive, quantitative picture for such multi-hadron rates. But this aim is complicated by the fact that lattice calculations are defined in a finite volume and with imaginary time, whereas transition rates are infinite-volume, real-time observables. In this talk I will present a method for circumventing these issues based on an old idea from geophysicists Backus and Gilbert

#### Event resources

### About Particle Physics Theory seminars

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..