基于 IceCube 与 PICO 的自旋相关暗物质–核子相互作用的速度无关约束
高能天体物理现象
2020-10-01 v2
摘要
采用银河系中暗物质（DM）粒子的各向同性 Maxwell 速度分布标准晕模型（SHM），当前对其与核子自旋相关散射截面最严格的约束来自 IceCube 中微子观测站与 PICO-60 CF 过热气泡室实验。前者对俘获于太阳中的 DM 粒子自湮灭产生的高能中微子敏感，而后者寻找 DM 与核子散射的核反冲事件。尽管较慢的 DM 粒子更可能被太阳俘获，较快的粒子更可能被 PICO 探测到。近期 N 体模拟表明平滑晕成分的 DM 显著偏离 SHM，而观测暗示本地 DM 的主导部分处于子结构中。我们采用 Ferrer 等人（2015）的方法，利用两种方法的互补性推导 DM–核子散射的保守约束。我们的结果在 C.L. 下约束质量为 1~TeV、以 （）湮灭、本地密度 的 DM 粒子 （6 ）。该约束随 反比缩放，且与 DM 速度分布无关。
引用
@article{arxiv.1907.12509,
title = {Velocity independent constraints on spin-dependent DM-nucleon interactions from IceCube and PICO},
author = {IceCube Collaboration and M. G. Aartsen and M. Ackermann and J. Adams and J. A. Aguilar and M. Ahlers and M. Ahrens and C. Alispach and K. Andeen and T. Anderson and I. Ansseau and G. Anton and C. Argüelles and J. Auffenberg and S. Axani and P. Backes and H. Bagherpour and X. Bai and A. Balagopal V. and A. Barbano and S. W. Barwick and B. Bastian and V. Baum and S. Baur and R. Bay and J. J. Beatty and K. -H. Becker and J. Becker Tjus and S. BenZvi and D. Berley and E. Bernardini and D. Z. Besson and G. Binder and D. Bindig and E. Blaufuss and S. Blot and C. Bohm and M. Börner and S. Böser and O. Botner and J. Böttcher and E. Bourbeau and J. Bourbeau and F. Bradascio and J. Braun and S. Bron and J. Brostean-Kaiser and A. Burgman and J. Buscher and R. S. Busse and T. Carver and C. Chen and E. Cheung and D. Chirkin and S. Choi and L. Classen and A. Coleman and G. H. Collin and J. M. Conrad and P. Coppin and P. Correa and D. F. Cowen and R. Cross and P. Dave and C. 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Hardy and O. Harris and E. W. Hoppe and M. Jin and L. Klopfenstein and C. B. Krauss and M. Laurin and I. Lawson and A. Leblanc and I. Levine and W. H. Lippincott and F. Mamedov and D. Maurya and P. Mitra and C. Moore and T. Nania and R. Neilson and A. J. Noble and P. Oedekerk and A. Ortega and M. -C. Piro and A. Plante and R. Podviyanuk and S. Priya and A. E. Robinson and S. Sahoo and O. Scallon and S. Seth and A. Sonnenschein and N. Starinski and I. Štekl and T. Sullivan and F. Tardif and E. Vázquez-Jáuregui and N. Walkowski and U. Wichoski and Y. Yan and V. Zacek and J. Zhang},
journal= {arXiv preprint arXiv:1907.12509},
year = {2020}
}
备注
9 pages, 3 figures, 1 table. To appear in Eur.Phys.J. C