Abstract:
Hadrons are multi-particle systems consisting of quarks and gluons.
These constituents cannot escape from hadrons due to their strong
interaction, which increases as they move apart. Experimental and
theoretical studies of hadronic structure indicate that the extent of this
confinement might vary from hadron to hadron depending upon their
composition. Similar aspect has also been pointed out in case of nuclei,
which needs to be probed. In our work, we have carried out a detailed
survey of the experimental and theoretical approaches with special reference
to quark structure. Our work is focused upon Generalized Chou Yang model
(a geometrical model) and its predictive power about structure of hadrons
and nuclei. In the literature, there is an indication that root mean square
(rms) radii of hadrons may decrease with increasing strange quark content.
In order to test this aspect, we computed rms radii of several hadrons ( ,
p,
) having varying strange quark content, by using
electromagnetic form factors predicted by Generalized Chou Yang model.
The computed results indicate that rms radii decrease with increasing
strange content in the hadrons (separately for baryons and mesons). The
computed rms radii of lighter nuclei are also found to decrease but with an
increase in mass. This decrease in the rms radii of lighter nuclei is attributed
to the increase in strength of strong interaction amongst nucleons. Greater
the number of nucleons, stronger will be the binding inside nucleus, thus
decreasing the rms radii or the nuclear size. An analogy is proposed
amongst hadrons and nuclei: rms radii decrease as the mass of hadrons/light
nuclei increase. The computed results are consistent with those from other
theoretical models and experiments.
