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- W4306769445 abstract "A bstract I discuss the 2-flavor Schwinger model with θ = 0 and small equal and opposite fermion masses (or θ = π with equal masses). The massless model has an unparticle sector with unbroken conformal symmetry. I argue that this special mass term modifies the conformal sector without breaking the conformal symmetry. I show in detail how mass-perturbation-theory works for correlators of flavor-diagonal fermion scalar bilinears. The result provides quantitative evidence that the theory has no mass gap for small non-zero fermion masses. The massive fermions are bound into conformally invariant unparticle stuff. I show how the long-distance conformal symmetry is maintained when small fermion masses are turned on and calculate the relevant scaling dimensions for small mass. I calculate the corrections to the 2- and 4-point functions of the fermion-bilinear scalars to leading order in perturbation theory in the fermion mass and describe a straightforward procedure to extend the calculation to all higher scalar correlators. I hope that this model is a useful and non-trivial example of unparticle physics, a sector with unbroken conformal symmetry coupled to interacting massive particles, in which we can analyze the particle physics in a consistent approximation." @default.
- W4306769445 created "2022-10-19" @default.
- W4306769445 creator A5083886767 @default.
- W4306769445 date "2022-10-18" @default.
- W4306769445 modified "2023-10-17" @default.
- W4306769445 title "Mass perturbation theory in the 2-flavor Schwinger model with opposite masses with a review of the background" @default.
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- W4306769445 doi "https://doi.org/10.1007/jhep10(2022)119" @default.
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