Momentum dependence of near-threshold photoproduction of ${\Xi }^{-}$ hyperons off nuclei and their properties in the nuclear medium

Abstract

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.

25 pages, 14 figures

References in corpus (20)

• In-medium nuclear interactions of low-energy hadrons
• Meson-nucleus potentials and the search for meson-nucleus bound states
• Observation of Coulomb-assisted nuclear bound state of ${\Xi }^{-}$-${}^{14}$N system
• Light $\Xi$ hypernuclei in four-body cluster models
• Constraints on ${\Xi }^{-}$ nuclear interactions from capture events in emulsion
• Photoproduction of Xi off nucleons
• Double strangeness ${\Xi }^{-}$ production as a probe of nuclear equation of state at high densities
• Localized $N,\Lambda ,\Sigma$, and $\Xi$ Single-Particle Potentials in Finite Nuclei Calculated with $S{U}_6$ Quark-Model Baryon-Baryon Interactions
• Extended-soft-core baryon-baryon model III. $S=-2$ hyperon-hyperon/nucleon interaction
• Hyperons in nuclear matter
• Single-${\Xi }^{-}$ hypernuclei with quark mean field model
• Extended-soft-core Baryon-Baryon ESC08 model III. S=-2 Hyperon-hyperon/nucleon Interaction
• Analysis of (pi^{+-},K^+) and (K^-,K^+) hypernuclear production spectra in distorted wave impulse approximation
• $\Xi$-nucleus potential for ${\Xi }^{-}$ quasifree production in the ${}^9$Be($K^{-}$, $K^{+}$) reaction
• Momentum dependent mean-fields of (anti)hyperons
• Baryonic matter and the medium modification of the baryon masses
• Double-strangeness production in $\Lambda p\to K^{+}X$ reaction
• Strangeness production and hypernuclear formation in proton and antiproton induced reactions
• Cascade hypernuclear production spectra at J-PARC
• Medium effects in antikaon-induced ${\Xi }^{-}$ hyperon production on nuclei near threshold

Cited by in corpus (2)

• Regarding the possibility to observe the LHCb hidden-charm strange pentaquark $P_{cs}(4459{)}^0$ in antikaon-induced $J/\psi$ meson production on protons and nuclei near the $J/\psi$$\Lambda$ production threshold
• An alternative way to decipher the nature of the doubly charmed tetraquark $T_{cc}(3875{)}^{+}$: its antiparticle $T_{\bar{c}\bar{c}}(3875{)}^{-}$ photoproduction off nuclei near threshold