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UID:2524@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20260504T100000
DTEND;TZID=Europe/Berlin:20260504T110000
DTSTAMP:20260430T093349Z
URL:https://qft.physik.hu-berlin.de/next-seminars/b-sc-presentation-jerome
 -reuschenbach/
SUMMARY:B.Sc Presentation: Jerome Reuschenbach - 
DESCRIPTION:Title: Electromagnetic Scattering In Worldline Quantum Field Th
 eory\n\nAbstract: In this thesis Worldline Quantum Field Theory (WQFT) is 
 employed to examine the classical unbound two-body\, i.e. scattering\, pro
 blem of electromagnetically interacting point particles. The WQFT formalis
 m allows for the systematic perturbative expansion of classical observable
 s\, which is useful in the field it originated in: the classical gravitati
 onal scattering problem. In many ways\, the electromagnetic (EM) scatterin
 g problem is a simplified version of the gravitational case\, which is use
 ful for illustrating the WQFT approach.\nThe first part of the present wor
 k discusses the way in which the classical equations of motion give rise t
 o WQFT Feynman diagrams – tree-level contributions to the path integral 
 of two worldline fields and one photon field. It discusses preliminaries o
 f the calculation of observables such as the impulse kick\, the scattering
  angle and the radiated momentum.\nThese observables are then calculated o
 rder by order\, which\, for each order\, entails new chal- lenges to be me
 t by new techniques: expressions for diagrams must be assembled\, divergen
 t inte- grals must be dealt with via dimensional regularization\, tensoria
 l loop momenta must be rewritten via tensor reduction\, scalar integrals m
 ust be solved with the use of Schwinger parametrization\, master integrals
  must be identified with the use of Integration by Parts- and symmetry-rel
 ations and they must be solved by use of differential equations in canonic
 al form and the method of regions.\nKnown values for the impulse kick coul
 d for the most part be reproduced\, regrettably\, however\, some calculati
 ons remain erroneous and yield wrong results. The results for the Master I
 ntegrals – a small set of scalar integrals\, which all others may be red
 uced to – at Next to Next to Leading Order could also not be reproduced.
CATEGORIES:ERC Group Seminar
LOCATION:Room 1.207\, Zum Großen Windkanal 2\, Berlin\, Germany
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Zum Großen Windkanal 2\, B
 erlin\, Germany;X-APPLE-RADIUS=100;X-TITLE=Room 1.207:geo:0,0
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TZID:Europe/Berlin
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DTSTART:20260329T030000
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