STRANGE HYPERON PRODUCTION IN p + p AND p + PbINTERACTIONS FROM NA49

Fizika B (Zagreb)

TOME ANTI¹ 

关键词: minimum-bias p + p collisions;    centrality-selected p + Pb collisions;    L;    [`(L)];    X- and [`(X)]+hyperons;    yields;    number of wounded nucleons;    multistrange baryons;    L/p ratio;   

DOI  :  

学科分类：物理（综合）

来源: Fizika B: a journal of experimental and theoretical physics

【 摘 要 】

In the NA49 experiment, data on L, [`(L)], X<sup>-</sup> and [`(X)]⁺ hyperons in minimum-biasp + p and centrality-selected p + Pb collisions at 158 GeV/c have beenobtained. For the first time, p + p measurements have been done for X^- and [`(X)]<sup>+</sup>in the kinematic region around central rapidity. Observed yields increase faster than thenumber of wounded nucleons when comparing p + Pb to p + p. As alreadyobserved in A + A collisions, the increase is larger for multistrange than forstrange baryons and for baryons than for anti-baryons. By comparing the energy dependenceof L and [`(L)]production at mid-rapidity, a striking similarity is observed between p + p andA + A data. This is also seen in the energy dependence of the L/p ratio.

【 授权许可】

Unknown