Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-06-28
Phys.Rev. D60 (1999) 094015
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, Latex, 6 ps figures. Submitted to Phys. Rev. D
Scientific paper
10.1103/PhysRevD.60.094015
We have applied the Meson Cloud Model to calculate inclusive momentum spectra of pions and kaons produced in high energy proton-proton and proton-nucleus collisions. For the first time these data are used to constrain the cloud cut-off parameters. We show that it is possible to obtain a reasonable description of data, especially the large $x_F$ ($x_F \geq 0.2$) part of the spectrum and at the same time describe (partially) the E866 data on $\bar d - \bar u$ and $\bar d / \bar u$. We also discuss the relative strength of the $\pi N$ and $\pi \Delta$ vertices. We find out that the corresponding cut-off parameters should be both soft and should not differ by more than 200 MeV from each other. An additional source (other than the meson cloud) of sea antiquark asymmetry, seems to be necessary to completely explain the data. A first extension of the MCM to proton nucleus collisions is discussed.
Carvalho Fabiana
Durães Francisco O.
Navarra Fernando S.
Nielsen Mikkel
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