Publication Date:
2020-09-01
Description:
The production of $$Xi (1321)^{-}$$ Ξ ( 1321 ) - and $$overline{Xi }(1321)^{+}$$ Ξ ¯ ( 1321 ) + hyperons in inelastic p+p interactions is studied in a fixed target experiment at a beam momentum of 158 $$hbox {Ge}hbox {V}!/!c$$ Ge / c . Double differential distributions in rapidity $${y}$$ y and transverse momentum $$p_{T}$$ p T are obtained from a sample of 33M inelastic events. They allow to extrapolate the spectra to full phase space and to determine the mean multiplicity of both $${Xi }{^-} $$ Ξ - and $$overline{Xi }{^+} $$ Ξ ¯ + . The rapidity and transverse momentum spectra are compared to transport model predictions. The $${Xi }{^-} $$ Ξ - mean multiplicity in inelastic p+p interactions at 158 $$hbox {Ge}hbox {V}!/!c$$ Ge / c is used to quantify the strangeness enhancement in A+A collisions at the same centre-of-mass energy per nucleon pair.
Print ISSN:
1434-6044
Electronic ISSN:
1434-6052
Topics:
Physics
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