arXiv:1404.6043·v4·High Energy Physics — Phenomenology
Exothermic isospin-violating dark matter after SuperCDMS and CDEX
Nan Chen🇨🇳 · Qing Wang🇨🇳 · Wei Zhao🇨🇳 · Shin-Ted Lin🇨🇳 · Qian Yue🇨🇳 · Jin Li🇨🇳
Abstract
We show that exothermic isospin-violating dark matter (IVDM) can make the results of the latest CDMS-Si experiment consistent with recent null experiments, such as XENON10, XENON100, LUX, CDEX, and SuperCDMS, whereas for the CoGeNT experiment, a strong tension still persists. For CDMS-Si, separate exothermic dark matter or isospin-violating dark matter cannot fully ameliorate the tensions among these experiments; the tension disappears only if exothermic scattering is combined with an isospin-violating effect of f_n/f_p=-0.7. For such exothermic IVDM to exist, at least a new vector gauge boson (dark photon or dark Z') that connects SM quarks to Majorana-type DM particles is required.
Comments: 12 pages, 6 figures