Momentum Distribution of a mass-imbalanced three-body system across the Efimov-Unatomic transition
The study investigates how changing spatial dimensions drives a transition between discrete and continuous scale invariance in mass-imbalanced three-body systems at a critical dimension Dc. The resulting momentum distribution at this transition exhibits a unique logarithmic scaling structure, requiring an additional quadratic-logarithmic term ($C_3''$) that depends sensitively on mass imbalance, revealing new universal scaling properties.