Strangeness production in proton proton collisions

Sibirtsev, A.; Cassing, W.

Strangeness production in proton proton collisions

A. Sibirtsev
(
- Giessen U. and
- Jagiellonian U. and
- Cracow, INP
)
,
W. Cassing
(
- Giessen U. and
- Jagiellonian U. and
- Cracow, INP
)

Feb, 1998

33 pages

e-Print:

nucl-th/9802019 [nucl-th]

Report number:

IFJ-1787-PH,
UGI-98-6

View in:

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Abstract:

The cross sections of the reaction

pp \to N K Y

for

K^+

or

K^0

mesons and

\Lambda

or

\Sigma

hyperons are calculated within the boson exchange model including pion and kaon exchange diagrams. We analyze the dependence of the results on the accuracy of the input

\pi N

amplitude. By fixing the

\pi NN

coupling constant and the cut-off parameter

{\Lambda}_{\pi}

at the

\pi NN

vertex we calculate the contribution from the kaon exchange diagram and obtain the ratio of the

KN \Lambda

and

KN \Sigma

coupling constants by a fit to the experimental data. This ratio is in a good agreement with the SU(6) prediction. Our calculated total cross sections for the different reaction channels are fitted by simple expressions and compared with other parameterizations used in the literature. Furthermore, the gross features of the production cross section close to threshold are discussed.

Note:

Seminars held at Institute of Physics, Jagellonian University •
33 pages, LaTeX, including 14 ps-figures Report-no: IFUJ, IFJ-1787/PH and UGI-98-6

p p: exclusive reaction
K: hadroproduction
hyperon: hadroproduction
pi: exchange
K: exchange
eta
rho(770)
nucleon resonance
Feynman graph
pi nucleon: scattering amplitude

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