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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
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2025
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| Accès en ligne: | https://arxiv.org/abs/2510.24759 |
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| _version_ | 1866909875051692032 |
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| author | Zhou, Ping Si, Meiyu Bi, Yuanjie Drebot, Illya Huang, Yongsheng |
| author_facet | Zhou, Ping Si, Meiyu Bi, Yuanjie Drebot, Illya Huang, Yongsheng |
| contents | The MeV Gamma-Gamma Collider would provide a direct experimental platform for elastic light-by-light scattering ($γγ\to γγ$) and the Breit-Wheeler process with two real photons ($γγ\to e^+e^-$). A Monte Carlo code, the Genie Background Evaluation Tool (GBET), has been developed to fully simulate two successive inverse Compton scatterings in the linear regime, including $e^- + \text{laser} \to e^-+ γ$ and $e^- + γ\rightarrow e^- + γ$. GBET overcomes the inherent information loss in traditional luminosity-spectrum-based chain simulations, preserving full particle-level information and achieving higher physical fidelity. The effectiveness of the code is verified by benchmarking against the simulation results of CAIN. GBET shows that the event rate of background photons generated by the first inverse Compton scattering is $6.24 \times 10^7$/s, with energies below 18 eV; the second inverse Compton scattering generates background electrons at 51.99/s and photons at 0.99/s, both with energies below 11 MeV. In addition, Møller scattering contributes background electrons at 0.56/s with energies around 200 MeV. The count rates of background electrons and positrons originating from the Breit-Wheeler process are 1312.2/s and 1314.3/s, respectively, with energy distributions ranging from 511 to 720 keV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_24759 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Estimation of the Inverse Compton Scattering Background in MeV Gamma-Gamma Collider Zhou, Ping Si, Meiyu Bi, Yuanjie Drebot, Illya Huang, Yongsheng Instrumentation and Detectors High Energy Physics - Phenomenology The MeV Gamma-Gamma Collider would provide a direct experimental platform for elastic light-by-light scattering ($γγ\to γγ$) and the Breit-Wheeler process with two real photons ($γγ\to e^+e^-$). A Monte Carlo code, the Genie Background Evaluation Tool (GBET), has been developed to fully simulate two successive inverse Compton scatterings in the linear regime, including $e^- + \text{laser} \to e^-+ γ$ and $e^- + γ\rightarrow e^- + γ$. GBET overcomes the inherent information loss in traditional luminosity-spectrum-based chain simulations, preserving full particle-level information and achieving higher physical fidelity. The effectiveness of the code is verified by benchmarking against the simulation results of CAIN. GBET shows that the event rate of background photons generated by the first inverse Compton scattering is $6.24 \times 10^7$/s, with energies below 18 eV; the second inverse Compton scattering generates background electrons at 51.99/s and photons at 0.99/s, both with energies below 11 MeV. In addition, Møller scattering contributes background electrons at 0.56/s with energies around 200 MeV. The count rates of background electrons and positrons originating from the Breit-Wheeler process are 1312.2/s and 1314.3/s, respectively, with energy distributions ranging from 511 to 720 keV. |
| title | Estimation of the Inverse Compton Scattering Background in MeV Gamma-Gamma Collider |
| topic | Instrumentation and Detectors High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.24759 |