Near-threshold $\varphi$ meson production in proton-nucleus reactions and $\varphi$ width in finite nuclei

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 $\varphi$ meson production in the interaction of 2.83 GeV protons with nuclei. In particular, the A- and momentum-dependences of the absolute and relative phi meson yields are investigated within the different scenarios for its in-medium width. Our model calculations take into account the acceptance window of the ANKE facility used in a recent experiment performed at COSY. They show that the pion-nucleon production channel contributes distinctly to the "low-momentum" $\varphi$ creation in heavy nuclei in the chosen kinematics and, hence, has to be taken into consideration on close examination of the dependences of the phi meson yields on the target mass number with the aim to get information on its width in the medium.

10 pages,8 figures; the slightly extended version of this paper will be published in J.Phys.G

References in corpus (4)

• phi photo-production from Li, C, Al, and Cu nuclei at Egamma=1.5 - 2.4 GeV
• The Near-Threshold Production of Phi Mesons in pp Collisions
• Phi-meson photoproduction from nuclei
• Precision measurement of the quasi-free pn->dphi reaction close to threshold

Cited by in corpus (10)

• Meson-nucleus potentials and the search for meson-nucleus bound states
• Measurement of the in-medium phi-meson width in proton-nucleus collisions
• Dilepton production in proton-induced reactions at SIS energies with the GiBUU transport model
• $\varphi$ meson self-energy in nuclear matter from $\varphi N$ resonant interactions
• $\varphi$ meson transparency in nuclei from $\varphi N$ resonant interactions
• Testing the $\varphi$-nuclear potential in pion-induced $\varphi$ meson production on nuclei near threshold
• Analysis of spectral modification of $\varphi$ mesons at finite density using a transport approach in the 12 GeV pA reactions
• Near-threshold J/Psi production in proton-nucleus collisions
• In-medium properties of the phi meson with phi N resonant contributions
• Forward coherent $\omega$ and $\varphi$ mesons production in the photon induced reaction on nuclei