Assertion: lepton's value | /r/HasProperty | solved by physics
Facets:
value: beyond the standard model
type: OTHER
value: typically
type: DEGREE
Source sentences:
text: \tilde {\theta }}} angle, but it remains to be explained why this angle is extremely small instead of being of order one; the particular value of the θ angle that must be very close to zero (in this case) is an example of a fine-tuning problem in physics, and is typically solved by physics beyond the Standard Model.