Testing the Lambda(1520) hyperon in-medium width in near-threshold proton-nucleus reactions

Abstract

In the framework of the nuclear spectral function approach for incoherent primary proton-nucleon and secondary pion-nucleon production processes we study the inclusive Lambda(1520) hyperon production in the interaction of 2.83 GeV protons with nuclei. In particular, the A and momentum dependences of the absolute and relative Lambda(1520) hyperon yields are investigated in two scenarios for its in-medium width. Our model calculations show that the pion-nucleon production channel contributes distinctly to the "low-momentum" Lambda(1520) creation both in light and heavy nuclei in the chosen kinematics and, hence, has to be taken into consideration on close examination of the dependences of the Lambda(1520) hyperon yields on the target mass number with the aim of getting information on its width in the medium. They also demonstrate that both the A dependence of the relative Lambda(1520) hyperon production cross section and momentum dependence of the absolute Lambda(1520) hyperon yield at incident energy of interest are appreciably sensitive to the Lambda(1520) in-medium width, which means that these observables may be an important tool to determine the above width.

16 pages

References in corpus (14)

• phi photo-production from Li, C, Al, and Cu nuclei at Egamma=1.5 - 2.4 GeV
• Modification of the $\omega$-Meson Lifetime in Nuclear Matter
• Inclusive $\omega$ photoproduction from nuclei and $\omega$ in the nuclear medium
• Phi-meson photoproduction from nuclei
• Omega attenuation in nuclei
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• Measurement of the in-medium K0 inclusive cross section in pi- -induced reactions at 1.15 GeV/c
• Near-threshold $\varphi$ meson production in proton-nucleus reactions and $\varphi$ width in finite nuclei
• $\Lambda (1520)$ and $\Sigma (1385)$ in the nuclear medium
• Transport analysis of K+ production in proton-nucleus reactions
• $A$ dependence of the $\gamma$- and $p$-induced production of the $\Lambda (1520)$ from nuclei
• A-dependence of phi-meson production in p+A collisions
• $\Lambda (1520)$ at finite density

Cited by in corpus (5)

• Meson-nucleus potentials and the search for meson-nucleus bound states
• Role of the $N^{\ast }(2080)$ in $pp\to p{K}^{+}\Lambda (1520)$ and ${\pi }^{-}p\to K^0\Lambda (1520)$ reactions
• Near-threshold $K^{\ast }(892{)}^{+}$ meson production in the interaction of ${\pi }^{-}$ mesons with nuclei
• Pion-induced production of $\Lambda (1520)$ hyperons on nuclei near threshold
• Medium effects in antikaon-induced ${\Xi }^{-}$ hyperon production on nuclei near threshold