Miller, Michael (2020) Infrared Cancellation and Measurement. In: UNSPECIFIED.
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Abstract
Quantum field theories containing massless particles such as photons and gluons are divergent not just in the ultraviolet, but also in the infrared. Infrared divergences are typically regarded as less conceptually problematic than ultraviolet divergences because there is a reasonably straightforward cancellation mechanism that renders measurable physical observables such as decay rates and cross-sections infrared finite. In this paper, I scrutinize the restriction to measurable physical observables that is required to make the cancellation mechanism applicable. I argue that this restriction does not necessitate a retreat to operationalism about the meaning of the theory as one might reasonably have worried, but it does call attention to a collection of underappreciated conceptual issues lurking in the infrared regime of quantum field theories with massless particles.
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Item Type: | Conference or Workshop Item (UNSPECIFIED) | ||||||
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Keywords: | infrared divergences, measurement, operationalism, instrumentalism, realism, quantum mechanics, quantum field theory | ||||||
Subjects: | General Issues > Operationalism/Instrumentalism Specific Sciences > Physics > Quantum Field Theory Specific Sciences > Physics > Quantum Mechanics General Issues > Realism/Anti-realism General Issues > Theory/Observation |
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Depositing User: | Mr. Michael E. Miller | ||||||
Date Deposited: | 04 Jul 2020 03:08 | ||||||
Last Modified: | 04 Jul 2020 03:08 | ||||||
Item ID: | 17428 | ||||||
Subjects: | General Issues > Operationalism/Instrumentalism Specific Sciences > Physics > Quantum Field Theory Specific Sciences > Physics > Quantum Mechanics General Issues > Realism/Anti-realism General Issues > Theory/Observation |
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Date: | 3 July 2020 | ||||||
URI: | https://philsci-archive.pitt.edu/id/eprint/17428 |
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