{"knowledge_schema": {"broad_category": "Physics \u2192 Particle Physics \u2192 Beyond the Standard Model", "refinement": "This problem involves the calculation of mass corrections for pseudo-Goldstone bosons in an extended model of particle physics that includes additional scalar and fermionic fields.", "specific_scope": "The focus is on determining the mass of the pseudo-Goldstone boson H_2 through radiative corrections, using a specific Lagrangian that includes singlet fermions and scalar fields.", "goal": "Identify the correct expression for the mass of the pseudo-Goldstone boson H_2 based on the provided candidates."}, "summary": "This problem pertains to particle physics, specifically the study of mass corrections in an extended Standard Model framework. The task is to determine the mass of a pseudo-Goldstone boson H_2 through radiative corrections, given a specific Lagrangian that includes various fields. The candidates provided represent different formulations of the mass expression, and the goal is to select the correct one based on the theoretical framework and the contributions from various particles."}