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arXiv · 2212.07042

Massive to Massless by Applying a Nonlocal Field Redefinition

Mojtaba Najafizadeh
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Abstract

The invariance of physical observables like particle's mass under a local field redefinition is a well-known and important property of quantum field theory. In this paper, on the other hand, we investigate nonlocal field redefinitions eliminating a physical observable from a theory. Indeed, by giving explicit examples, we present invertible nonlocal field redefinitions reducing a massive theory to the massless one, and vice versa. The studied examples are: classical harmonic oscillator, the scalar field theory, and the Dirac field theory.

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Mojtaba Najafizadeh. 2022-12-14. Massive to Massless by Applying a Nonlocal Field Redefinition. https://doi.org/10.1103/physrevd.107.045008

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