Particle Theory Seminars

The particle theory seminars are organized by the Theory Group of the Laboratory for Particle Physics (LTP) at PSI.

The next seminar takes place on Thursday 28.04 2022 at 10:00 in OFLG/402

Speaker:  Andrea Shindler (Michigan State University)

Title: Unravelling Matter-Antimatter Asymmetry in the Universe


The observed baryon asymmetry in the universe cannot be reconciled with the current form of the Standard Model (SM) of particle physics. The amount of CP-violation stemming from the Cabibbo-Kobayashi-Maskawa matrix is not sufficient to explain the observed matter-antimatter asymmetry. Historically, one of the first systems to be studied in the search for CP-violation is the electric dipole moment (EDM) of the neutron. The contribution to the neutron EDM coming from the SM is several orders of magnitude smaller than the current experimental bound, thus providing a unique background-free window for potential discovery of physics Beyond the Standard Model (BSM).

After a brief summary of the current status for experimental searches of a neutron EDM, I describe the different CP-violating sources and the challenges that present a calculation of the corresponding hadronic matrix elements. I then proceed detailing recent results obtained, with my collaborators, on the neutron EDM with a specific focus on the main theoretical and numerical tool used: the gradient flow. I conclude with near-term goals, challenges and an optimistic view into the future.

 Date Speaker Title Institute Place
29.06.21 T. Plehn

Global SMEFT Analyses for the LHC

U. Heidelberg Tuesday, 17:00
01.06.21 N. Schär

Automation of NNLO Amplitude Construction in OpenLoops

PSI Tuesday, 17:00
27.04.21 L. Vernazza

On the factorization of scattering processes near threshold at next-to-leading power

U. Torino Tuesday, 17:00
13.04.21 M. Spira Higgs Boson Production and Decay at Hadron Colliders PSI

Tuesday, 17:00

02.12.20 P. Monni Parton showers beyond logarithmic accuracy CERN

Wednesday 11:30

20.11.20 M. Grazzini Differential predictions for ttbar at NNLO University of Zürich

Friday 11:30

21.10.20 G. Stagnitto The partonic structure of the electron at the next-to-leading logarithmic accuracy in QED University of Zürich

Wednesday 11:30

30.09.20 M. Riembau EFT anomalous dimensions from the S-matrix University of Genève/EPFL

Wednesday 11:30

13.02.20 L. Vernazza Hadronic B Decays INFN Torino Thursday 16:00, WHGA/U129
21.01.20 M. Schreck Quantum gravity phenomenology: Testing CPT- and Lorentz invariance Universidade Federal do Maranhao Tuesday 15:00, WHGA/001
29.10.19 P. Torrielli Infrared subtraction and factorisation beyond NLO in QCD University of Turin Tuesday 14:00, WBGB/021
10.04.18 O. Tomalak Two-photon exchange corrections to elastic lepton-proton scattering and atomic spectroscopy University of Mainz Tuesday 11:30, WBGB/020
14.03.18 N. Michel Hyperfine structure of heavy muonic atoms MPI for Nuclear Physics Heidelberg Wednesday 14:00, WHGA/121
04.12.17 J. Heeck New Perspectives on Lepton Flavor Violation Université Libre de Bruxelles Monday 14:00, WBGB/020
24.10.17 M. Spira Higgs Boson Decay and Production at Hadron Colliders PSI Tuesday 15:00, WBGB/020
04.10.17 M. Zoller A new method for one-loop amplitude generation and reduction in OpenLoops Zurich University Wednesday 11:30, WBGB/020
22.09.17 L. Calibbi Two ways of connecting flavour to Dark Matter: flavour portals and axiflavon ITP Beijing Friday 15:00, WHGA/121
07.09.17 R. Mandal Rare B decays and new physics IMS Chennai Thursday 15:00, WHGA/121
11.07.17 M. Blanke Simplified models of quark-flavoured dark matter beyond MFV ITP Karlsruhe Tuesday 15:00, WHGA/121
12.06.17 C. Frugiuele Atomic probes of new physics Weizmann Inst. Monday 16:00, WBWA/210
26.01.17 D. Stöckinger Higgs boson mass: the quest for precise predictions in SUSY models TU Dresden Thursday 11:30, WBGB/021
16.12.16 T. Geib Conversion of Bound Muons: Lepton Flavour and Number Violation MPI Munich Friday 11:00, WHGA/121
28.11.16 O. Fischer Testing the origin of neutrino masses at future high-energy colliders Basel Monday 11:00, WBGB/21
14.11.16 A. Greljo R(D*) anomaly and its implications for LHC UZH Monday 11:00, WHGA/121
19.11.14 G. Luisoni NLO Computations with GoSam: from LHC to muon decay MPI Munich Wednesday 10:30, WBGB/020
11.02.14 C. Ji Nuclear polarization effects in muonic atoms TRIUMF Tuesday 11:30, WBGB/021
03.12.13 M. Pruna The impact of dimension 6 effective vertices in LFV muonic transitions PSI Tuesday 11:30, WBGB/021
26.11.13 T. Robens Higgs Singlet extension in the light of the LHC discovery TU Dresden Tuesday 11:30, WBGB/021
15.10.13 R. Gröber Vector-like fermions in Composite Higgs Models ITP Karlsruhe Thursday 11:30, WBGB/020
17.09.13 J. Diaz Lorentz symmetry breaking: phenomenology and experiments Indiana Tuesday 11:30, WBGB/019
30.07.13 M. Pospelov Low-energy constraints on muon and tau neutral current parity-violating processes Perimeter Tuesday 11:30, WBGB/019
13.12.12 S. Plätzer Matching, merging and all that DESY Thursday 11:30, WBGB/021
06.12.12 A. Carmona New Production Mechanism for Composite Higgs at the LHC ETHZ Thursday 11:30, WBGB/021
22.10.12 E. Popenda Korrekturen nächst-führender Ordnung in supersymmetrischer QCD zur Squark-Paarproduktion am LHC Karlsruhe/PSI Monday 14:30, WBGB/021
11.09.12 L. Hosekova Corrections to the Production of Two Leptons Pairs via Vector-Boson Fusion at LHC Valencia Tuesday 11:30, WBGA/B16