Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Momentum dependence of near-threshold photoproduction of $\Xi^-$
  hyperons off nuclei and their properties in the nuclear medium   We study the near-threshold inclusive photoproduction of $\Xi^-$ hyperons off
$^{12}$C and $^{184}$W target nuclei within a first-collision model relying on
the nuclear spectral function and including incoherent $\Xi^-$ production in
direct elementary ${\gamma}p \to K^+{K^+}\Xi^-$ and ${\gamma}n \to
K^+{K^0}\Xi^-$ processes. The model takes into account the impact of the
nuclear effective scalar $K^+$, $K^0$, $\Xi^-$ and their Coulomb potentials on
these processes as well as the absorption of final $\Xi^-$ hyperons in nuclear
matter, the binding of intranuclear nucleons and their Fermi motion. We
calculate the absolute differential cross sections and their ratios for the
production of $\Xi^-$ hyperons off these nuclei at laboratory polar angles
$\le$ 45$^{\circ}$ by photons with energies of 2.5 and 3.0 GeV, with and
without imposing the phase space constraints on the $\Xi^-$ emission angle in
the respective ${\gamma}p$ center-of-mass system. We also calculate the
momentum dependence of the transparency ratio for $\Xi^-$ hyperons for the
$^{184}$W/$^{12}$C combination at these photon energies. We show that the
$\Xi^-$ momentum distributions (absolute and relative) at the adopted initial
photon energies possess, contrary to the transparency ratio for $\Xi^-$
hyperons, a definite sensitivity to the considered changes in the scalar
$\Xi^-$ nuclear mean-field potential at saturation density $\rho_0$ in the
low-momentum range of 0.1--0.8 GeV/c. Therefore, the precise measurements of
these distributions in a dedicated experiment at the CEBAF facility will
provide valuable information on the $\Xi^-$ in-medium properties, which will be
supplementary to that inferred from studying of the ($K^-$,$K^+$) reactions at
initial momenta of 1.6--1.8 GeV/c.

28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th