Strangeness in the Nucleon

There are several different experimental indications, such as the σπN term, strange spin polarization, strangeness contribution to the magnetic moment of the proton, ratio of strange and non strange quark flavor distributions which suggest that the nucleon contains a hidden strangeness component which is contradictory to the naive constituent quark model. Chiral constituent quark model with configuration mixing (χCQMconfig) is known to provide a satisfactory explanation of the “proton spin problem” and related issues. In the present work, we have extended the model to carry out the calculations for the parameters pertaining to the strange quark content of the nucleon, for example, the strange spin polarization ∆s, strange components of the weak axial vector form factors ∆Σ and ∆8 as well as F and D, strangeness magnetic moment of the proton μ s p, the strange quark content in the nucleon fs coming from the σπN term, the ratios between strange and non-strange quarks 2s u+d and 2s ū+d̄ , contribution of strangeness to angular momentum sum rule etc.. Our result demonstrates the broad consistency with the experimental observations as well as other theoretical considerations.