The rst measure of relative partonic contributions in DIS at HERA using an average hadronic charge

High Energy Deep Inelastic Scattering events at the H detector at the HERA collider are used for analysis in the current region of the Breit frame The analysis is concerned with extracting a correlation between the hadrons produced by the fragmentation of a struck parton in DIS events and with that struck parton s charge We de ne a fragmentation variable xp ph Q where Q is the four momentum transfer between the lepton and the struck quark and ph is the momentum that a hadron h possesses The hadronic tracks are weighted according to their momenta so that more energetic tracks have a bigger weight The entire data sample is nor malised by an average weight We further de ne a variable Cj to be a normalised momentum weighted charge sum of the whole hadronic system for a given event The Cj distributions show nodal structure at points corresponding to net charges of To emphasise this behaviour we take the ratio of the distribution s mean to its standard deviation and maximise it with respect to an initiating quark The method outlined in this analysis may be used to provide a statistical method of decomposing proton structure functions into partonic structure functions Con sistency checks on this method are also presented in this thesis The method s reliability was high and was robust under all performed tests Further analysis using the Mandelstam variable s i e the invariant centre of mass energy of the hard sub process was performed in the hope that it would provide information about the di erent kinematics used in various Monte Carlo simulations to model some classes of physics events e g Boson Gluon Fusion QCD Compton Splitting the sample into two sub groups one with high s where we are clearly in the perturbative QCD region the other low s provided no further information than already obtained in an inclusive treatment An investigation of events having di erent classes of Cj also provided no additional information The method described in this thesis can be used to extract the relative partonic contributions in DIS at HERA and the results obtained are presented