Production of Z bosons and neutrinos in early universe
Abstract Production of Z bosons and neutrinos is studied in the expanding de Sitter universe. The expression of the transition amplitudes in the case of Z boson interaction with leptons is established by using perturbative methods. Then the amplitude and probability for the spontaneous generation fr...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2019-06-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-019-6988-9 |
| _version_ | 1819010199104520192 |
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| author | Cosmin Crucean |
| author_facet | Cosmin Crucean |
| author_sort | Cosmin Crucean |
| collection | DOAJ |
| description | Abstract Production of Z bosons and neutrinos is studied in the expanding de Sitter universe. The expression of the transition amplitudes in the case of Z boson interaction with leptons is established by using perturbative methods. Then the amplitude and probability for the spontaneous generation from vacuum of a Z boson a neutrino and an antineutrino are computed analytically and a graphical analysis is performed in terms of the expansion parameter. We found that the probability for this process is nonvanishing only for large expansion conditions of the early Universe. We discuss the Minkowski limit and obtain that in this limit the amplitude is zero, result which corresponds to the well established fact that spontaneous particle generation from vacuum in Minkowski space-time is forbidden by the simultaneous energy and momentum conservation in perturbative processes. The total probability of the process is computed and we prove that this quantity is important only for the regime of large expansion from early universe and is vanishing in the Minkowski limit. |
| first_indexed | 2024-12-21T01:08:28Z |
| format | Article |
| id | doaj.art-13d51a150def4e2e8f57c1c12cc4b7ca |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-21T01:08:28Z |
| publishDate | 2019-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-13d51a150def4e2e8f57c1c12cc4b7ca2022-12-21T19:20:59ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522019-06-0179611710.1140/epjc/s10052-019-6988-9Production of Z bosons and neutrinos in early universeCosmin Crucean0Faculty of Physics, West University of TimişoaraAbstract Production of Z bosons and neutrinos is studied in the expanding de Sitter universe. The expression of the transition amplitudes in the case of Z boson interaction with leptons is established by using perturbative methods. Then the amplitude and probability for the spontaneous generation from vacuum of a Z boson a neutrino and an antineutrino are computed analytically and a graphical analysis is performed in terms of the expansion parameter. We found that the probability for this process is nonvanishing only for large expansion conditions of the early Universe. We discuss the Minkowski limit and obtain that in this limit the amplitude is zero, result which corresponds to the well established fact that spontaneous particle generation from vacuum in Minkowski space-time is forbidden by the simultaneous energy and momentum conservation in perturbative processes. The total probability of the process is computed and we prove that this quantity is important only for the regime of large expansion from early universe and is vanishing in the Minkowski limit.http://link.springer.com/article/10.1140/epjc/s10052-019-6988-9 |
| spellingShingle | Cosmin Crucean Production of Z bosons and neutrinos in early universe European Physical Journal C: Particles and Fields |
| title | Production of Z bosons and neutrinos in early universe |
| title_full | Production of Z bosons and neutrinos in early universe |
| title_fullStr | Production of Z bosons and neutrinos in early universe |
| title_full_unstemmed | Production of Z bosons and neutrinos in early universe |
| title_short | Production of Z bosons and neutrinos in early universe |
| title_sort | production of z bosons and neutrinos in early universe |
| url | http://link.springer.com/article/10.1140/epjc/s10052-019-6988-9 |
| work_keys_str_mv | AT cosmincrucean productionofzbosonsandneutrinosinearlyuniverse |