Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singularities in the single lepton energy spectrum for precise measuring
  mass and spin of Dark Matter particles at the e^+e^- Linear Collider   We consider models in which stability of Dark Matter particles $D$ is ensured
by the conservation of the new quantum number, called D-parity here. Our models
contain also charged $D$-odd particle $D^\pm$.
  Here I propose the method for precision measuring masses and spin of
$D$-particles via the study of energy distribution of single lepton ($e$ or
$\mu$) in the process $\epe\to D^+D^-\to DDW^+W^-$ with the observable states
{\it dijet + lepton} ($\mu$ or $e$) + {\it nothing}. To determine precisely
masses of $D$ and $D^\pm$, it is sufficient to measure the singular points in
the lepton energy distributions (upper edge and kinks or peak). After this,
even a rough measuring of corresponding cross section allows to determine the
spin of $D$ particles.
  This approach is free from the difficulties of a well-known methods of
measuring the masses via the edges of the energy distribution of dijets,
representing $W$, which obliged by inaccuracies in measuring the energies of
individual jets.

30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci