Is the polarized light flavor sea-quark asymmetric?
نویسنده
چکیده
Simple formulas on ∆d̄(x)−∆ū(x) are proposed for extracting their values from polarized deep-inelastic semiinclusive data. The present SMC and HERMES data suggest that ∆d̄(x)−∆ū(x) is slightly negative, though the precision of the data is not enough for confirming it.
منابع مشابه
Models for the Polarized Parton Distributions of the Nucleon
Polarized deep inelastic scattering (DIS) data are analyzed in leading and next–to– leading order of QCD within the common ‘standard’ scenario of polarized parton distributions with a flavor–symmetric light sea (antiquark) distribution δq̄, and a completely SU(3)f broken ‘valence’ scenario with totally flavor-asymmetric light sea densities (δū 6= δd̄ 6= δs̄). The latter flavor–broken light sea dis...
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We propose new formulas for extracting a difference of the polarized light sea–quark density, ∆d̄(x)−∆ū(x), from polarized deep–inelastic semi–inclusive data. We have estimated the value of it from the present experimental data measured by SMC and HERMES groups. Although the data might suggest a violation of polarized light flavor sea–quark symmetry, the precision of the present data is not enou...
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