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Resonance Production on Nuclei at High Energies: Nuclear-Medium Effects and Space-Time Picture | | K.G. Boreskov
; L.A. Kondratyuk
; M.I. Krivoruchenko
; J. H. Koch
; | | Date: |
17 Dec 1996 | | Journal: | Nucl.Phys. A619 (1997) 295-320 | | Subject: | nucl-th hep-ph | | Affiliation: | ITEP, Moscow), M.I. Krivoruchenko (University of Tuebingen) and J. H. Koch (NIKHEF, Amsterdam | | Abstract: | The influence of nuclear matter on the properties of coherently produced resonances is discussed. It is shown that, in general, the mass distribution of resonance decay products has a two-component structure corresponding to decay outside and inside the nucleus. The first (narrow) component of the amplitude has a Breit-Wigner form determined by the vacuum values of mass and width of the resonance. The second (broad) component corresponds to interactions of the resonance with the nuclear medium. It can be also described by a Breit-Wigner shape with parameters depending e.g. on the nuclear density and on the cross section of the resonance-nucleon interaction. The resonance production is examined both at intermediate energies, where interactions with the nucleus can be considered as a series of successive local rescatterings, and at high energies, $E>E_{crit}$, where a change of interaction picture occurs. This change of mechanisms of the interactions with the nucleus is typical for the description within the Regge theory approach and is connected with the nonlocal nature of the reggeon interaction. | | Source: | arXiv, nucl-th/9701031 | | Services: | Forum | Review | PDF | Favorites | |
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