Quantum electrodynamics in the gravitational field of a cosmic string
We evaluate the cross section for electron-positron pair production by a single high energy photon in the space-time of a static, straight cosmic string. Energy and momentum conservation precludes this process in empty Minkowski space. It happens around a cosmic string, in spite of the local flatnes...
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1994
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v49_n2_p755_Skarzhinsky http://hdl.handle.net/20.500.12110/paper_05562821_v49_n2_p755_Skarzhinsky |
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paper:paper_05562821_v49_n2_p755_Skarzhinsky2023-06-08T15:42:15Z Quantum electrodynamics in the gravitational field of a cosmic string Harari, Diego Darío We evaluate the cross section for electron-positron pair production by a single high energy photon in the space-time of a static, straight cosmic string. Energy and momentum conservation precludes this process in empty Minkowski space. It happens around a cosmic string, in spite of the local flatness of the metric, as a consequence of the conical structure of space. Previous results based on a simplified model with scalar fields are here extended to the realistic QED case. Analytic expressions are found in three different regimes: near the threshold, at energies much larger than the electron rest mass M, and at ultrahigh energies, much larger than M, with the string mass per unit length in Planck units. © 1994 The American Physical Society. Fil:Harari, D.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1994 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v49_n2_p755_Skarzhinsky http://hdl.handle.net/20.500.12110/paper_05562821_v49_n2_p755_Skarzhinsky |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We evaluate the cross section for electron-positron pair production by a single high energy photon in the space-time of a static, straight cosmic string. Energy and momentum conservation precludes this process in empty Minkowski space. It happens around a cosmic string, in spite of the local flatness of the metric, as a consequence of the conical structure of space. Previous results based on a simplified model with scalar fields are here extended to the realistic QED case. Analytic expressions are found in three different regimes: near the threshold, at energies much larger than the electron rest mass M, and at ultrahigh energies, much larger than M, with the string mass per unit length in Planck units. © 1994 The American Physical Society. |
| author |
Harari, Diego Darío |
| spellingShingle |
Harari, Diego Darío Quantum electrodynamics in the gravitational field of a cosmic string |
| author_facet |
Harari, Diego Darío |
| author_sort |
Harari, Diego Darío |
| title |
Quantum electrodynamics in the gravitational field of a cosmic string |
| title_short |
Quantum electrodynamics in the gravitational field of a cosmic string |
| title_full |
Quantum electrodynamics in the gravitational field of a cosmic string |
| title_fullStr |
Quantum electrodynamics in the gravitational field of a cosmic string |
| title_full_unstemmed |
Quantum electrodynamics in the gravitational field of a cosmic string |
| title_sort |
quantum electrodynamics in the gravitational field of a cosmic string |
| publishDate |
1994 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v49_n2_p755_Skarzhinsky http://hdl.handle.net/20.500.12110/paper_05562821_v49_n2_p755_Skarzhinsky |
| work_keys_str_mv |
AT hararidiegodario quantumelectrodynamicsinthegravitationalfieldofacosmicstring |
| _version_ |
1768542319527591936 |