费米大天区望远镜各向同性弥散伽马射线测量对宇宙学暗物质湮灭的限制
宇宙学与河外天体物理
2015-05-18 v1 高能天体物理现象
高能物理 - 唯象学
摘要
费米大天区望远镜(Fermi-LAT)首次公布的各向同性弥散伽马射线测量结果与单一幂律谱吻合良好，并且在20至100 GeV能量范围内没有显示出暗物质源主导贡献的任何特征。我们利用该测量通量的绝对大小和谱形，推导出三类通用暗物质候选者（湮灭为夸克、带电轻子和单色光子）的截面上限。来自湮灭暗物质的预言伽马射线通量强烈依赖于暗物质的底层分布，我们利用不同的物质结构形成结果来评估这些不确定性。我们还量化了暗物质限制如何依赖于假设的传统背景以及宇宙对高能伽马射线的透明度。在合理的背景和暗物质结构情景下（但并非在我们考虑的所有情景中），可以排除为解释Fermi-LAT和PAMELA实验测量的电子和正电子超出而提出的模型。推导出的限制也开始探测预期来自热产生遗迹（例如在最小超对称模型中）且主要湮灭为夸克的截面。对于单色伽马射线特征，当前的测量仅限制了具有非常强信号的暗物质情景。
引用
@article{arxiv.1002.4415,
title = {Constraints on Cosmological Dark Matter Annihilation from the Fermi-LAT Isotropic Diffuse Gamma-Ray Measurement},
author = {LAT collaboration and A. A. Abdo and M. Ackermann and M. Ajello and L. Baldini and J. Ballet and G. Barbiellini and D. Bastieri and K. Bechtol and R. Bellazzini and B. Berenji and R. D. Blandford and E. D. Bloom and E. Bonamente and A. W. Borgland and A. Bouvier and J. Bregeon and A. Brez and M. Brigida and P. Bruel and T. H. Burnett and S. Buson and G. A. Caliandro and R. A. Cameron and P. A. Caraveo and S. Carrigan and J. M. Casandjian and C. Cecchi and O. C. Elik and A. Chekhtman and C. C. Cheung and J. Chiang and S. Ciprini and R. Claus and J. Cohen-Tanugi and J. Conrad and S. Cutini and C. D. Dermer and A. de Angelis and F. de Palma and S. W. Digel and E. do Couto e Silva and P. S. Drell and R. Dubois and D. Dumora and Y. Edmonds and C. Farnier and C. Favuzzi and S. J. Fegan and W. B. Focke and P. Fortin and M. Frailis and Y. Fukazawa and P. Fusco and F. Gargano and D. Gasparrini and N. Gehrels and S. Germani and N. Giglietto and F. Giordano and T. Glanzman and G. Godfrey and J. E. Grove and L. Guillemot and S. Guiriec and M. Gustafsson and D. Hadasch and A. K. Harding and D. Horan and R. E. Hughes and A. S. Johnson and W. N. Johnson and T. Kamae and H. Katagiri and J. Kataoka and N. Kawai and M. Kerr and J. Knodlseder and M. Kuss and J. Lande and L. Latronico and M. Llena Garde and F. Longo and F. Loparco and B. Lott and M. N. Lovellette and P. Lubrano and A. Makeev and M. N. Mazziotta and J. E. McEnery and C. Meurer and P. F. Michelson and W. Mitthumsiri and T. Mizuno and C. Monte and M. E. Monzani and A. Morselli and I. V. Moskalenko and S. Murgia and P. L. Nolan and J. P. Norris and E. Nuss and T. Ohsugi and N. Omodei and E. Orlando and J. F. Ormes and D. Paneque and J. H. Panetta and D. Parent and V. Pelassa and M. Pepe and M. Pesce-Rollins and F. Piron and S. Raino and R. Rando and A. Reimer and O. Reimer and T. Reposeur and A. Y. Rodriguez and M. Roth and H. F. W. Sadrozinski and A. Sander and P. M. Saz Parkinson and J. D. Scargle and A. Sellerholm and C. Sgro and E. J. Siskind and P. D. Smith and G. Spandre and P. Spinelli and J. L. Starck and M. S. Strickman and D. J. Suson and H. Takahashi and T. Tanaka and J. B. Thayer and J. G. Thayer and D. F. Torres and Y. Uchiyama and T. L. Usher and V. Vasileiou and N. Vilchez and V. Vitale and A. P. Waite and P. Wang and B. L. Winer and K. S. Wood and T. Ylinen and G. Zaharijas and M. Ziegle},
journal= {arXiv preprint arXiv:1002.4415},
year = {2015}
}
备注
29 pages, 7 figures, to be published in JCAP. Corresponding authors: Jan Conrad, Michael Gustafsson, Alexander Sellerholm, Gabrijela Zaharijas