Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prospects of Migdal Effect in the Explanation of XENON1T Electron Recoil
  Excess   The XENON1T experiment has recently announced the observation of an excess in
electron recoil events at energy range of $1-7$ keV with a $3.5~\sigma$ signal
significance over the Standard Model prediction. In this letter we sketch the
prospects of explaining such an excess from Migdal ionization events with below
threshold nuclear recoil energies. Interestingly, these are expected to show
signal events in the ballpark energy scale of the observed excess. We
demonstrate that the observed signal can be reproduced through the Migdal
effect by an $\mathcal{O}(1)$ GeV neutron-philic dark matter having a
spin-dependent coupling with the nucleus. A more optimistic scenario is
explored where the Migdal ionization is driven by MeV scale boosted dark
matter.

17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg