| 21. | :: : : : The weak coupling constant is actually larger than the electromagnetic coupling constant.
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| 22. | :: : : : The weak coupling constant is actually larger than the electromagnetic coupling constant.
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| 23. | But the question was about free particles, so you can turn all the coupling constants to zero.
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| 24. | For example, one often sets up hierarchies of approximation based on the importance of various coupling constants.
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| 25. | :: : In a fundamental level the strength of an interaction is given by the coupling constant.
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| 26. | The coupling constant, g, is proportional to the scattering length a _ s of two interacting bosons:
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| 27. | Essentially, the beta-function describes how the coupling constants vary as one scales the system x \ rightarrow bx.
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| 28. | String theories have a coupling constant.
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| 29. | Exchanging the dilaton field with minus itself exchanges a very large coupling constant with a very small one.
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| 30. | This increases the range of coupling constants that can be detected, and also reduces signal loss from relaxation.
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