Chiral oscillations in quantum field theory
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866914928979345408 |
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| author | Bittencourt, Victor Blasone, Massimo Zanfardino, Gennaro |
| author_facet | Bittencourt, Victor Blasone, Massimo Zanfardino, Gennaro |
| contents | Dirac particles have two intrinsic degrees-of-freedom, helicity and chirality. While helicity is conserved in time, chirality is not constant under time evolution for massive particles, yielding the phenomenon of chiral oscillations. So far, chiral oscillations have been mainly described in the framework of single particle relativistic quantum mechanics. In this paper, we present a quantum field theory approach to chiral oscillations in analogy with the one used to describe flavor mixing and oscillations. By taking the expectation value of chiral charges, we obtain the same chiral oscillation formula derived via standard relativistic quantum mechanics. We find that chiral charges are diagonalized by a Bogoliubov transformation: this implies that the vacuum for particles with definite chirality is orthogonal to the one for those with definite energy. In the case of neutrinos, our results can be further extended to include also flavor oscillations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_16742 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Chiral oscillations in quantum field theory Bittencourt, Victor Blasone, Massimo Zanfardino, Gennaro High Energy Physics - Phenomenology Dirac particles have two intrinsic degrees-of-freedom, helicity and chirality. While helicity is conserved in time, chirality is not constant under time evolution for massive particles, yielding the phenomenon of chiral oscillations. So far, chiral oscillations have been mainly described in the framework of single particle relativistic quantum mechanics. In this paper, we present a quantum field theory approach to chiral oscillations in analogy with the one used to describe flavor mixing and oscillations. By taking the expectation value of chiral charges, we obtain the same chiral oscillation formula derived via standard relativistic quantum mechanics. We find that chiral charges are diagonalized by a Bogoliubov transformation: this implies that the vacuum for particles with definite chirality is orthogonal to the one for those with definite energy. In the case of neutrinos, our results can be further extended to include also flavor oscillations. |
| title | Chiral oscillations in quantum field theory |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2408.16742 |