Near threshold Lambda and Sigma production in p p collisions

Gasparian, A.M.; Haidenbauer, J.; Hanhart, C.; Kondratyuk, L.; Speth, J.

doi:10.1016/S0375-9474(01)00407-9

Near threshold Lambda and Sigma production in p p collisions

A.M. Gasparian
(
- Julich, Forschungszentrum and
- Moscow, ITEP
)
,
J. Haidenbauer
(
- Julich, Forschungszentrum
)
,
C. Hanhart
(
- Washington U., Seattle
)
,
L. Kondratyuk
(
- Moscow, ITEP
)
,
J. Speth
(
- Julich, Forschungszentrum
)

Mar, 2000

3 pages

Part of Proceedings, 16th International IUPAP Conference on Few body problems in physics (FB16) : Taipei, Taiwan, March 6-10, 2000

Published in:

Nucl.Phys.A 684 (2001) 397-399

Contribution to:

- FB16

e-Print:

nucl-th/0006080 [nucl-th]

DOI:

10.1016/S0375-9474(01)00407-9

View in:

pdf

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Abstract:

A model calculation for the reactions

pp\to p\Lambda K^+

and

pp\to N\Sigma K

near their thresholds is presented. It is argued that the experimentally observed strong suppression of

\Sigma^0

production compared to

\Lambda

production at the same excess energy could be due to a destructive interference between the

\pi

and

K

exchange contributions in the reaction

pp\to p\Sigma^0 K^+

. Predictions for

pp\to p\Sigma^+ K^0

and

pp\to n\Sigma^+ K^+

are given.

Note:

3 pages, 1 figure, uses espcrc1.sty, contribution presented at the 16th International Conference on Few-Body Problems in Physics, Taipei, Taiwan, 6-10 March 2000

talk: Taipei 2000/03/06
p p: exclusive reaction
hyperon: hadroproduction
Lambda
Sigma0
Sigma+
channel cross section: energy dependence
pi: exchange
K: exchange
interference

References(6)

Figures(0)

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