Nucleon strange $s\bar{s}$ asymmetry to the $\Lambda /\bar{\Lambda }$ fragmentation

Abstract

The difference between the $\Lambda$ and $\bar{\Lambda }$ longitudinal spin transfers in the semi-inclusive deep inelastic scattering process is intensively studied. The study is performed in the current fragmentation region, by considering the intermediate hyperon decay processes and sea quark fragmentation processes, while the strange sea $s\bar{s}$ asymmetry in the nucleon is taken into account. The calculation in the light-cone quark-diquark model shows that the strange sea asymmetry gives a proper trend to the difference between the $\Lambda$ and $\bar{\Lambda }$ longitudinal spin transfers. When considering the nonzero final hadron transverse momentum, our results can explain the COMPASS data reasonably. The nonzero final hadron transverse momentum is interpreted as a natural constraint to the final hadron $z$ range where the longitudinal spin transfer is more sensitive to the strange sea $s\bar{s}$ asymmetry.

arXiv comment10 latex pages, 5 figures, final version in journal publication. arXiv admin note: text overlap with arXiv:1310.2005

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Cited by in corpus (8)

• Several Topics on Transverse Momentum-Dependent Fragmentation Functions
• Inclusive and semi-inclusive production of spin-3/2 hadrons in $e^{+}{e}^{-}$ annihilation
• Strange quark-antiquark asymmetry of nucleon sea from $\Lambda /\bar{\Lambda }$ polarization
• Suppression of Spin Transfer to $\Lambda$ Hyperon in Deep-Inelastic Scattering
• Nucleon strangeness polarization from $\Lambda /\bar{\Lambda }$ hyperon production in polarized proton-proton collision at RHIC
• Quark-antiquark asymmetry of helicity distributions in the nucleon sea
• Nuclear EMC effect through $\bar{\Lambda }/\Lambda$ production in semi-inclusive deep-inelastic scattering processes
• Study of the $s-\bar{s}$ asymmetry in the proton