Project Details
Projekt
Precision calculations in hadronic physics (A07)
Subject Area
Nuclear and Elementary Particle Physics, Quantum Mechanics, Relativity, Fields
Term
from 2016 to 2024
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 196253076
The Standard Model of particle physics (SM), despite being extremely successful, is also incomplete. The baryon asymmetry and the dark matter of the universe, the neutrino masses, and the hierarchy problem remain open questions. A widely considered extension of the SM, based on a fundamental external symmetry is supersymmetry, which solves the hierarchy problem, and offers solutions to the other shortcomings of the SM. With the minimal particle content, supersymmetry comes in two versions distinguished by a multiplicative discrete symmetry: R-parity conserving (RPC) and R-parity Violating (RPV) supersymmetry. RPC naturally solves the dark matter puzzle via the stable lightest neutralino. RPV naturally includes light neutrinos via the lepton-number violating interactions, with an additional heavy see-saw scale for the Majorana mass. RPC and RPV have the same particle content, but RPV has 45 additional Yukawa-like operators: L L E, L Q D, U D D, as well as corresponding soft supersymmetry breaking terms. These all violate lepton- or baryon-number. RPV models are not as widely studied in the literature, but as we have extensively discussed, they are at least as well motivated. The purpose of project A.7 is to set the best possible limits on the RPV parameters using the latest developments in hadron physics.
DFG Programme
CRC/Transregios
International Connection
China
Applicant Institution
Rheinische Friedrich-Wilhelms-Universität Bonn
Project Heads
Professor Herbert Dreiner, Ph.D.; Privatdozent Dr. Bastian Kubis, until 12/2020; Professor Dr. Cai-Dian Lü
