{"knowledge_schema": {"broad_category": "Physics \u2192 Particle Physics \u2192 Beyond the Standard Model", "refinement": "This problem involves calculating the mass of a pseudo-Goldstone boson through radiative corrections in an extended model of particle physics.", "specific_scope": "The focus is on the mass approximation of the pseudo-Goldstone boson H_2, considering contributions from various particles and parameters in the Lagrangian provided.", "goal": "Identify the correct expression for the mass of the pseudo-Goldstone boson H_2 based on the given candidates."}, "summary": "In this problem, we are tasked with determining the mass of a pseudo-Goldstone boson H_2 through radiative corrections in an extended Standard Model framework. The candidates provided include various expressions that incorporate contributions from different particles and parameters. The goal is to analyze these expressions and select the one that accurately represents the mass approximation based on the theoretical framework given."}