A Clue to the mechanism of Lambda K+ production in p p reactions

Sibirtsev, Alexander; Tsushima, Kazuo; Thomas, Anthony William

doi:10.1016/S0370-2693(98)00025-2

A Clue to the mechanism of Lambda K+ production in p p reactions

Alexander Sibirtsev
(
- Giessen U.
)
,
Kazuo Tsushima
(
- Adelaide U.
)
,
Anthony William Thomas
(
- Adelaide U.
)

Nov, 1997

8 pages

Published in:

Phys.Lett.B 421 (1998) 59-63

e-Print:

nucl-th/9711028 [nucl-th]

DOI:

10.1016/S0370-2693(98)00025-2

Report number:

UGI-97-24,
ADP-97-43-T271

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Abstract:

We analyse the

p p \to p \Lambda K^+

total cross section data which were recently measured by the COSY-11 collaboration at an energy 2~MeV above the reaction threshold. Our analysis suggests that the measurement of the invariant mass spectrum for the

\Lambda K^+

at energies around 100 MeV above the threshold can provide a new constraint on the theoretical calculations for this reaction. In particular, the measurement can give a clue as to whether the reaction is dominated by resonance excitation or not. Thus, it should contribute to further understanding of the strangeness production mechanism. We show the invariant mass spectra for the

\Lambda K^+

system in these optimal kinematic conditions calculated by several approaches, and demonstrate that our suggestion is experimentally feasible.

Note:

One typo is corrected, Latex, 8 pages, 3 Postscript figures, to appear in Phys. Lett. B Report-no: UGI-97-24, ADP-97-43/T271

13.75
25.40
14.20.G
24.10
Kaon production
Proton proton collision
Baryon resonance
One boson exchange
ΛK + invariant mass spectrum
ΛK+ invariant mass spectrum

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