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