Vector dark matter annihilation with internal bremsstrahlung
We consider scenarios in which the annihilation of self-conjugate spin-1 dark matter to a Standard Model fermion–antifermion final state is chirality suppressed, but where this suppression can be lifted by the emission of an additional photon via internal bremsstrahlung. We find that this scenario c...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-03-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317300126 |
| _version_ | 1818537286756728832 |
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| author | Gulab Bambhaniya Jason Kumar Danny Marfatia Alekha C. Nayak Gaurav Tomar |
| author_facet | Gulab Bambhaniya Jason Kumar Danny Marfatia Alekha C. Nayak Gaurav Tomar |
| author_sort | Gulab Bambhaniya |
| collection | DOAJ |
| description | We consider scenarios in which the annihilation of self-conjugate spin-1 dark matter to a Standard Model fermion–antifermion final state is chirality suppressed, but where this suppression can be lifted by the emission of an additional photon via internal bremsstrahlung. We find that this scenario can only arise if the initial dark matter state is polarized, which can occur in the context of self-interacting dark matter. In particular, this is possible if the dark matter pair forms a bound state that decays to its ground state before the constituents annihilate. We show that the shape of the resulting photon spectrum is the same as for self-conjugate spin-0 and spin-1/2 dark matter, but the normalization is less heavily suppressed in the limit of heavy mediators. |
| first_indexed | 2024-12-11T18:48:50Z |
| format | Article |
| id | doaj.art-a080b42ccc4548a0840881ea7773c828 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-11T18:48:50Z |
| publishDate | 2017-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-a080b42ccc4548a0840881ea7773c8282022-12-22T00:54:22ZengElsevierPhysics Letters B0370-26931873-24452017-03-01766C17718010.1016/j.physletb.2017.01.005Vector dark matter annihilation with internal bremsstrahlungGulab Bambhaniya0Jason Kumar1Danny Marfatia2Alekha C. Nayak3Gaurav Tomar4Physical Research Laboratory, Ahmedabad 380009, IndiaDepartment of Physics & Astronomy, University of Hawaii, Honolulu, HI 96822, USADepartment of Physics & Astronomy, University of Hawaii, Honolulu, HI 96822, USADepartment of Physics, Indian Institute of Technology, Kanpur 208016, IndiaPhysical Research Laboratory, Ahmedabad 380009, IndiaWe consider scenarios in which the annihilation of self-conjugate spin-1 dark matter to a Standard Model fermion–antifermion final state is chirality suppressed, but where this suppression can be lifted by the emission of an additional photon via internal bremsstrahlung. We find that this scenario can only arise if the initial dark matter state is polarized, which can occur in the context of self-interacting dark matter. In particular, this is possible if the dark matter pair forms a bound state that decays to its ground state before the constituents annihilate. We show that the shape of the resulting photon spectrum is the same as for self-conjugate spin-0 and spin-1/2 dark matter, but the normalization is less heavily suppressed in the limit of heavy mediators.http://www.sciencedirect.com/science/article/pii/S0370269317300126 |
| spellingShingle | Gulab Bambhaniya Jason Kumar Danny Marfatia Alekha C. Nayak Gaurav Tomar Vector dark matter annihilation with internal bremsstrahlung Physics Letters B |
| title | Vector dark matter annihilation with internal bremsstrahlung |
| title_full | Vector dark matter annihilation with internal bremsstrahlung |
| title_fullStr | Vector dark matter annihilation with internal bremsstrahlung |
| title_full_unstemmed | Vector dark matter annihilation with internal bremsstrahlung |
| title_short | Vector dark matter annihilation with internal bremsstrahlung |
| title_sort | vector dark matter annihilation with internal bremsstrahlung |
| url | http://www.sciencedirect.com/science/article/pii/S0370269317300126 |
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