Talk:(−1)F

This article was nominated for deletion on 22 October 2020. The result of the discussion was keep.

π or 2π?[edit]

The article says:

This is always a global internal symmetry of any quantum field theory with fermions and corresponds to a rotation by 2π

Could it have meant π rather than 2π? That's what I'd expect a multiplication by −1 to be. Michael Hardy (talk) 23:18, 22 June 2008 (UTC)[reply]

See Spin#Spin and the Pauli exclusion principle and [1] (Anyon is a generalizatin of ferminon and bosons for twi dimensions. Phase

\theta 2\pi s

may have intermediate values. Exchange makes factor exp(i θ), monodromy (that's what we are talking about here) exp(2 i θ). So I think you'r right: Exchange(!) makes for fermions a factor -1.

Generally, I do not know why we need this F. The factor simply is (-1)^(2s) with spin quantum number s. So why not choose F = 2s? --Ernsts (talk) 19:05, 29 March 2009 (UTC)[reply]

The 2π is correct. A fermion behaves like one side of a rotor sandwich. When the axes are rotated by 2π, each rotor gets multiplied by -1.

I don't know what this "actually means". I'm not sure anyone does.

166.137.14.113 (talk) 17:33, 4 April 2015 (UTC)Collin237[reply]