Flavor and Spin Structure of $Λ$-Baryon at Large x

Details Flavor and Spin Structure of $Λ$-Baryon at Large x Flavor and Spin Structure of $Λ$-Baryon at Large x

1999-06-17

arxiv.org/abs/hep-ph/9906424v2

Phys.Lett. B477 (2000) 107-113

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 latex pages, one figure added, three eps figures, abstract and discussions changed, prediction comparison with new experime

Scientific paper

10.1016/S0370-2693(00)00167-2

It is shown that a perturbative QCD (pQCD) based analysis and the SU(6) quark-diquark model give significant different predictions concerning the flavor and spin structure for the quark distributions of the $\Lambda$-baryon near $x=1$. Detailed predictions for the ratios $u(x)/s(x)$ of unpolarized quark distributions, $\Delta s(x)/s(x)$ of valence strange quark, and $\Delta u(x)/u(x)$ of valence up and down quarks of the $\Lambda$ are given from the quark-diquark model and from a pQCD based model. It is found that the up and down quarks are positively polarized at large $x$, even though their net spin contributions to the $\Lambda$ might be zero or negative. The significant difference for $u(x)/s(x)$ between the two different approaches are predicted. The prediction of positively polarized up and down quarks inside the $\Lambda$ at large $x$ has been supported by the available data of $\Lambda$-polarization in $Z$ decays and also by the most recent HERMES result of spin transfer to the $\Lambda$ in deep elastic scattering of polarized lepton on the nucleon target.

Affiliated with

Also associated with

No associations

Rating

Flavor and Spin Structure of $Λ$-Baryon at Large x does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Flavor and Spin Structure of $Λ$-Baryon at Large x, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flavor and Spin Structure of $Λ$-Baryon at Large x will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-615239