Asymmetries between strange and antistrange particle production in pion–proton interactions

Abstract

Recent measurements of the asymmetries between Feynman x distributions of strange and antistrange hadrons in π − A interactions show a strong effect as a function of x F . We calculate strange hadron production in the context of the intrinsic model and make predictions for particle/antiparticle asymmetries in these interactions.

Ξ− and distributions in hadron–nucleus interactions

“…The apparent difficulties with uncorrelated fragmentation seen in Ref. [28] are confirmed here. Thus coalescence production is the most effective mechanism for strange hadron production in the intrinsic model.…”

“…We treat the strange quark as heavy, as in Ref. [28], rather than as a massless parton in jet-like processes. Treating the strange quark as a jet means selecting a minimum p T to keep the cross section finite.…”

“…duction in Ref. [28]. In the intrinsic model, a hadron can fluctuate into Fock state configurations with a combination of light and strange quark pairs.…”

Tetraquark production in double parton scattering

“…In spite of this uncertainty, the existing experience in the literature is encouraging. In [27] the authors used (15) to compute the cross section of strange particle production and calculated the asymmetries in the production of K + /K − , Λ/Λ, .…”

Nuclear effects on tetraquark production by double parton scattering

“…In spite of this uncertainty, the existing experience in the literature is encouraging. In [24] the authors used (16) to compute the cross section of strange particle production and calculated the asymmetries in the production of K + /K − , Λ/Λ, ...etc. They have used the convolution formula of the parton model and have taken the strange quark mass to be m s 500 MeV.…”