Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-07-22
Physics
High Energy Physics
High Energy Physics - Phenomenology
Latex file (15 pages), 3 figures using FEYNMAN.tex, New version contains minor modifications in the text
Scientific paper
Deep Inelastic scattering experiments using transversely polarised targets yield information on the structure function $g_2$. By means of a free-field analysis, we study the operator structure of $g_2$ and demonstrate the need for retaining the twist three mass terms in order to maintain current-conservation. We show that the structure function $g_T=g_1+g_2$ has a much simpler operator structure as compared to $g_2$, in spite of the fact that, like $g_2$, $g_T$ has a twist-three component. We demonstrate factorisation of the hadronic tensor into hard and soft parts for the case of $g_T$. We show that the first moment of the gluonic contribution to $g_T$ vanishes, and discuss possible physical applications.
Sridhar K.
Mathews Prakash
Ravindran V.
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