Absorption of {phi} mesons in near-threshold proton-nucleus reactions

Journal Article · Fri Nov 14 23:00:00 EST 2008 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778808110148· OSTI ID:21404680

Paryev, E Ya ^[1]

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1. Russian Academy of Sciences, Institute for Nuclear Research (Russian Federation)

In the framework of the nuclear-spectral-function approach for incoherent primary proton-nucleon and secondary pion-nucleon production processes, we study the inclusive {phi}-meson production in the interaction of 2.83-GeV protons with nuclei. In particular, the A dependences of the absolute and relative {phi}-meson yields are investigated within the different scenarios for its in-medium width as well as for the cross-section ratio {sigma}{sub pn} {yields} {sub pn}{phi}/{sigma}pp {yields} {sub pp}{phi}. 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 {phi} 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. They also demonstrate that the experimentally unknown ratio {phi}{sub pn} {yields}{sub pn}{phi}/{sigma}pp {yields}{sub pp}{phi} has a weak effect on the A dependence of the relative {phi}-meson-production cross section at incident energy of present interest, whereas it is found to be appreciably sensitive to the {phi} in-medium width, which means that this relative observable can indeed be useful to help determine the above width from the direct comparison of the results of our calculations with the future data from the respective ANKE-at-COSY experiment.

• OSTI ID: 21404680
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 11 Vol. 71; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BARYON REACTIONS
BARYON-BARYON INTERACTIONS
BOSONS
CHARGED-PARTICLE REACTIONS
COMPARATIVE EVALUATIONS
COSY STORAGE RING
CROSS SECTIONS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
EVALUATION
FUNCTIONS
GEV RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY NUCLEI
INTERACTIONS
MASS NUMBER
MESONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PHI MESONS
PIONS
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
PSEUDOSCALAR MESONS
SPECTRAL FUNCTIONS
STORAGE RINGS
SYNCHROTRONS