Azhar, Feraz and Loeb, Abraham (2018) Gauging Fine-Tuning. [Preprint]

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Abstract

We introduce a mathematical framework for quantifying fine-tuning in general physical settings. In particular, we identify two distinct perspectives on fine-tuning, namely, a local and a global perspective --- and develop corresponding measures. These measures apply broadly to settings characterized by an arbitrary number of observables whose values are dependent on an arbitrary number of parameters. We illustrate our formalism by quantifying fine-tuning as it arises in two pertinent astrophysical settings: (i) in models where a significant fraction of the dark matter in the universe is in the form of primordial black holes, and (ii) in scenarios that derive the fraction of protons in habitable dark-matter halos from underlying models of cosmic inflation.

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Item Type:	Preprint
Creators:	Creators Email ORCID Azhar, Feraz feraz_azhar@fas.harvard.edu Loeb, Abraham aloeb@cfa.harvard.edu
Keywords:	Fine-tuning, primordial black holes, cosmic inflation, dark-matter halos
Subjects:	Specific Sciences > Physics > Cosmology General Issues > Theory Change General Issues > Values In Science
Depositing User:	Dr. Feraz Azhar
Date Deposited:	17 Sep 2018 20:34
Last Modified:	17 Sep 2018 20:34
Item ID:	15036
Subjects:	Specific Sciences > Physics > Cosmology General Issues > Theory Change General Issues > Values In Science
Date:	17 September 2018
URI:	https://philsci-archive.pitt.edu/id/eprint/15036

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