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Results tagged with chirality
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user 80687
Chirality is defined through the ±1 eigenvalue under action of γ^5 on ψ, a Dirac field thus projected into its left- or right-handed component by the projection operators (1−γ^5)/2 or (1+γ^5)/2 on ψ. For massless particles (only!) chirality coincides with [helicity], a notion which is frame-dependent, and hence ambiguous for massive particles. Avoid using the [helicity] tag instead: the projectors *must* be implied.
13
votes
Accepted
Chirality of the Electromagnetic Field Tensor
On can define the dual of a field strength tensor by
$$
F^*_{\mu\nu}= \frac 12 \epsilon_{\mu\nu\alpha\beta} F_{\alpha\beta}
$$
and one can impose the condition that $F^*_{\mu\nu} =F_{\mu\nu}$ (self …
- 56.6k
2
votes
What is the physical interpretation of chirality / chiral anomaly?
The discussion section at the end of our recent paper arXiv:1804.08668 has a list of references to the history of anomalies and their physical interpretation. This may be of some use.
- 56.6k
1
vote
How do we show that for massless fermions, Helcity and Chirality align?
The Weyl hamiltonan for a right-handed (positive chirality) fermion is
$$
H= {\boldsymbol \sigma}\cdot {\bf p}
$$
so with ${\bf p}=(0,0,p)$ positive energy eigenstates have their spin a +1 eigenstate …
- 56.6k
1
vote
With massless fermions, does a finite chiral rotation only affect the coefficient of the the...
It is only the global rotation effects that is zero for topologically trivial spacetimes. There are still local effects that are captured by your eq 1.
- 56.6k
0
votes
Chiral vortical effect (CVE) and gravitational anomaly
Did you read my and Ji-Young Kim's derivation using the Kerr metric? https://arxiv.org/abs/1804.08668 ? I'd like to know what you think/
- 56.6k