Dark matter annihilation via Breit-Wigner enhancement with heavier mediator
We propose a new scenario that both the dark matter freeze-out in the early Universe and its possible annihilation for indirect detection around a supermassive black hole are enhanced by a Breit-Wigner resonance. With the mediator mass larger than the total initial dark matter mass, this annihilatio...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325000504 |
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| author | Yu Cheng Shao-Feng Ge Jie Sheng Tsutomu T. Yanagida |
| author_facet | Yu Cheng Shao-Feng Ge Jie Sheng Tsutomu T. Yanagida |
| author_sort | Yu Cheng |
| collection | DOAJ |
| description | We propose a new scenario that both the dark matter freeze-out in the early Universe and its possible annihilation for indirect detection around a supermassive black hole are enhanced by a Breit-Wigner resonance. With the mediator mass larger than the total initial dark matter mass, this annihilation is almost forbidden at late times. Thus, the stringent cosmic microwave background and indirect detection constraints do not apply. However, a supermassive black hole can accelerate the dark matter particles to reactivate this resonant annihilation whose subsequent decay to photons leaves a unique signal. The running Fermi-LAT and the future COSI satellites can test this scenario. |
| format | Article |
| id | doaj-art-9adaee1b000146c2a49547120792a2bb |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-9adaee1b000146c2a49547120792a2bb2025-02-10T04:34:10ZengElsevierPhysics Letters B0370-26932025-02-01861139290Dark matter annihilation via Breit-Wigner enhancement with heavier mediatorYu Cheng0Shao-Feng Ge1Jie Sheng2Tsutomu T. Yanagida3Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, China; Key Laboratory for Particle Astrophysics and Cosmology (MOE) & Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors at: Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, China.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, China; Key Laboratory for Particle Astrophysics and Cosmology (MOE) & Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai 200240, ChinaTsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, China; Key Laboratory for Particle Astrophysics and Cosmology (MOE) & Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors at: Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, China.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, China; Key Laboratory for Particle Astrophysics and Cosmology (MOE) & Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai 200240, ChinaWe propose a new scenario that both the dark matter freeze-out in the early Universe and its possible annihilation for indirect detection around a supermassive black hole are enhanced by a Breit-Wigner resonance. With the mediator mass larger than the total initial dark matter mass, this annihilation is almost forbidden at late times. Thus, the stringent cosmic microwave background and indirect detection constraints do not apply. However, a supermassive black hole can accelerate the dark matter particles to reactivate this resonant annihilation whose subsequent decay to photons leaves a unique signal. The running Fermi-LAT and the future COSI satellites can test this scenario.http://www.sciencedirect.com/science/article/pii/S0370269325000504 |
| spellingShingle | Yu Cheng Shao-Feng Ge Jie Sheng Tsutomu T. Yanagida Dark matter annihilation via Breit-Wigner enhancement with heavier mediator Physics Letters B |
| title | Dark matter annihilation via Breit-Wigner enhancement with heavier mediator |
| title_full | Dark matter annihilation via Breit-Wigner enhancement with heavier mediator |
| title_fullStr | Dark matter annihilation via Breit-Wigner enhancement with heavier mediator |
| title_full_unstemmed | Dark matter annihilation via Breit-Wigner enhancement with heavier mediator |
| title_short | Dark matter annihilation via Breit-Wigner enhancement with heavier mediator |
| title_sort | dark matter annihilation via breit wigner enhancement with heavier mediator |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325000504 |
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