Fine-tuning (physics)

In theoretical physics, fine-tuning is the process in which parameters of a model must be adjusted very precisely in order to fit with certain observations.

Theories requiring fine-tuning are regarded as problematic in the absence of a known mechanism to explain why the parameters happen to have precisely the observed values that they return. The heuristic rule that parameters in a fundamental physical theory should not be too fine-tuned is called naturalness.^[1]^[2]

^ Grinbaum, Alexei (1 February 2012). "Which Fine-Tuning Arguments Are Fine?". Foundations of Physics. 42 (5): 615–631. arXiv:0903.4055. Bibcode:2012FoPh...42..615G. doi:10.1007/s10701-012-9629-9. S2CID 15590514.
^ Giudice, Gian (2008). "Naturally Speaking: The Naturalness Criterion and Physics at the LHC". LHC Perspectives. Perspectives on LHC Physics. pp. 155–178. arXiv:0801.2562. Bibcode:2008plnc.book..155G. doi:10.1142/9789812779762_0010. ISBN 978-981-277-975-5. S2CID 15078813.

[1] Grinbaum, Alexei (1 February 2012). "Which Fine-Tuning Arguments Are Fine?". Foundations of Physics. 42 (5): 615–631. arXiv:0903.4055. Bibcode:2012FoPh...42..615G. doi:10.1007/s10701-012-9629-9. S2CID 15590514.

[2] Giudice, Gian (2008). "Naturally Speaking: The Naturalness Criterion and Physics at the LHC". LHC Perspectives. Perspectives on LHC Physics. pp. 155–178. arXiv:0801.2562. Bibcode:2008plnc.book..155G. doi:10.1142/9789812779762_0010. ISBN 978-981-277-975-5. S2CID 15078813.

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