Theorie Palaver

Programm für das Sommersemester 2021

Tuesdays, 14:30 Uhr s.t.

Institut für Physik
MITP seminar room
live at Zoom

13.04.21Raffaele Tito D'Agnolo, IPhT Saclay
I will discuss settings where the Higgs mass squared affects the vacuum expectation value of local operators and can thus act as a “trigger” of new cosmological dynamics. This triggering mechanism underlies several existing solutions to the hierarchy problem that trace the origin of the weak scale to the early history of the Universe. Thinking about these solutions more systematically from the point of view of weak scale triggers allows to understand their common predictions, to find new solutions and to identify unexpected physics related to naturalness in a rather model-independent way. As an example I discuss a BSM trigger in a Two Higgs Doublet Model and show how it can be used to link the tuning of the Higgs mass to that of the cosmological constant. This weak scale trigger demands the existence of new Higgs states necessarily comparable to or lighter than the weak scale, with no wiggle room to decouple them.
14:30 Uhr s.t., MITP seminar room, at Zoom

zukünftige Termine
20.04.21Xiaofeng Xu, Bern University
Canonical Feynman integrals are of great interest in the study of scattering amplitudes at the multi-loop level. We propose to construct d log-form integrals of the hypergeometric type, treat them as a representation of Feynman integrals, and project them into master integrals using intersection theory. This provides a constructive way to build canonical master integrals whose differential equations can be solved easily. We use our method to investigate both the maximally cut integrals and the uncut ones at one and two loops, and demonstrate its applicability in problems with multiple scales.
14:30 Uhr s.t., MITP seminar room, at Zoom

Slides can be found in each seminar's page under 'Attachments'.

Video recordings for the WiSe 2020/21 can be found on Panopto: https://video.uni-mainz.de/Panopto/Pages/Sessions/List.aspx?folderID=c54f039b-ac4d-4243-b710-accc009a35cb

Koordination: Kontakt:

Dr. Enrico Morgante

Dr. Javier Fuentes-Martin

emorgant@uni-mainz.de

jfuentes@uni-mainz.de