Resonant Effect for Breit–Wheeler Process in the Field of an X-ray Pulsar
The resonant process of the creation of an ultrarelativistic electron–positron pair by two hard gamma quanta in the field of an X-ray pulsar (the Breit–Wheeler process modified by an external field) was theoretically studied. Under resonance conditions, the intermediate virtual electron (positron) i...
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2020-10-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/6/11/190 |
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| author | Vitalii D. Serov Sergei P. Roshchupkin Victor V. Dubov |
| author_facet | Vitalii D. Serov Sergei P. Roshchupkin Victor V. Dubov |
| author_sort | Vitalii D. Serov |
| collection | DOAJ |
| description | The resonant process of the creation of an ultrarelativistic electron–positron pair by two hard gamma quanta in the field of an X-ray pulsar (the Breit–Wheeler process modified by an external field) was theoretically studied. Under resonance conditions, the intermediate virtual electron (positron) in the external field becomes a real particle. As a result, there are four reaction channels for the process instead of two. For each of those channels, the initial process of the second order in the fine structure constant in the field of an X-ray pulsar effectively reduces into two successive processes of the first order: X-ray-stimulated Breit–Wheeler process and X-ray-stimulated Compton effect. The resonant kinematics of the process was also studied in detail. The process had characteristic threshold energy, and all initial and final particles had to be ultrarelativistic and propagate in a narrow cone. Furthermore, the resonant energy spectrum of the electron-positron pair significantly depended on emission angles. Clearly, there was a qualitative difference between resonant and nonresonant cases. Lastly, the resonant differential probability of studied process was obtained. The resonant differential probability significantly exceeded the nonresonant one without the external field of an X-ray pulsar. |
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| format | Article |
| id | doaj.art-9b4b5afc9ca041678113d5af0cff3630 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-10T15:25:49Z |
| publishDate | 2020-10-01 |
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| spelling | doaj.art-9b4b5afc9ca041678113d5af0cff36302023-11-20T18:03:33ZengMDPI AGUniverse2218-19972020-10-0161119010.3390/universe6110190Resonant Effect for Breit–Wheeler Process in the Field of an X-ray PulsarVitalii D. Serov0Sergei P. Roshchupkin1Victor V. Dubov2Department of Theoretical Physics, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 Saint Petersburg, RussiaDepartment of Theoretical Physics, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 Saint Petersburg, RussiaDepartment of Theoretical Physics, Peter the Great St. Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 Saint Petersburg, RussiaThe resonant process of the creation of an ultrarelativistic electron–positron pair by two hard gamma quanta in the field of an X-ray pulsar (the Breit–Wheeler process modified by an external field) was theoretically studied. Under resonance conditions, the intermediate virtual electron (positron) in the external field becomes a real particle. As a result, there are four reaction channels for the process instead of two. For each of those channels, the initial process of the second order in the fine structure constant in the field of an X-ray pulsar effectively reduces into two successive processes of the first order: X-ray-stimulated Breit–Wheeler process and X-ray-stimulated Compton effect. The resonant kinematics of the process was also studied in detail. The process had characteristic threshold energy, and all initial and final particles had to be ultrarelativistic and propagate in a narrow cone. Furthermore, the resonant energy spectrum of the electron-positron pair significantly depended on emission angles. Clearly, there was a qualitative difference between resonant and nonresonant cases. Lastly, the resonant differential probability of studied process was obtained. The resonant differential probability significantly exceeded the nonresonant one without the external field of an X-ray pulsar.https://www.mdpi.com/2218-1997/6/11/190external field QEDOleinik’s resonancesBreit–Wheeler processX-ray pulsars |
| spellingShingle | Vitalii D. Serov Sergei P. Roshchupkin Victor V. Dubov Resonant Effect for Breit–Wheeler Process in the Field of an X-ray Pulsar Universe external field QED Oleinik’s resonances Breit–Wheeler process X-ray pulsars |
| title | Resonant Effect for Breit–Wheeler Process in the Field of an X-ray Pulsar |
| title_full | Resonant Effect for Breit–Wheeler Process in the Field of an X-ray Pulsar |
| title_fullStr | Resonant Effect for Breit–Wheeler Process in the Field of an X-ray Pulsar |
| title_full_unstemmed | Resonant Effect for Breit–Wheeler Process in the Field of an X-ray Pulsar |
| title_short | Resonant Effect for Breit–Wheeler Process in the Field of an X-ray Pulsar |
| title_sort | resonant effect for breit wheeler process in the field of an x ray pulsar |
| topic | external field QED Oleinik’s resonances Breit–Wheeler process X-ray pulsars |
| url | https://www.mdpi.com/2218-1997/6/11/190 |
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