5 papers
W-boson helicity fractions in top decay as probes of dimension-6 and dimension-8 SMEFT operators
Afsaneh Kianfar, Gholamhossein Haghighat, Mojtaba Mohammadi Najafabadi
Precision measurements of top-quark decays provide powerful probes of physics beyond the Standard Model (SM). While the impact of dimension-6 operators in the SM Effective Field Th…
Constraints on Vector-Like Top Dipole Interactions from Top-Associated Photon Measurements at the LHC
Mohammad Sahraei, Yasaman Hosseini, Mojtaba Mohammadi Najafabadi
Vector-like top partners with electric charge are predicted in many extensions of the Standard Model and are actively searched for at the LHC through their electroweak decay…
Probing the Chern-Simons Portal at the HL-LHC through Displaced Vertices from W Boson Associated Production
Mohammad Nourbakhsh, Mojtaba Mohammadi Najafabadi
This study explores the Chern-Simons portal model, an extension of the Standard Model that introduces a massive neutral vector boson associated with a gauge symmetry.…
Reinterpretation and preservation of data and analyses in HEP
Jon Butterworth, Sabine Kraml, Harrison Prosper +145
Data from particle physics experiments are unique and are often the result of a very large investment of resources. Given the potential scientific impact of these data, which goes…
Machine Learning Approaches to Top Quark Flavor-Changing Four-Fermion Interactions in Trilepton Signals at the LHC
Meisam Ghasemi Bostanabad, Mojtaba Mohammadi Najafabadi
We explore the top quark flavor-changing 4-Fermi interactions ( and ) with scalar, vector, and tensor structures using machine learning models to analyze tri-lepton pro…