Abstract
We present two applications of an unquenched quark model for baryons in which the effects of quark-antiquark pairs (uū, d \( \bar d \) and s \( \bar s \)) are taken into account in an explicit form. It is shown that the inclusion of the quark-antiquark pairs leads to an excess of \( \bar d \) over ū quarks in the proton as well as to a relatively large contribution of orbital angular momentum to the proton spin.
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Bijker, R., Santopinto, E. (2008). Flavor asymmetry of the nucleon sea in an unquenched quark model. In: Hammer, HW., Kleber, V., Thoma, U., Schmieden, H. (eds) NSTAR 2007. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85144-8_30
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DOI: https://doi.org/10.1007/978-3-540-85144-8_30
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