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Small x behaviour of the chirally-odd parton distribution h 1(x,Q 2) |
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| Authors: | R Kirschner L Mankiewicz A Schäfer L Szymanowski |
| Institution: | 1. Institut für Theoretische Physik and Naturwissenschaftlich-Theoretisches Zentrum, Universit?t Leipzig, Augustusplatz, D-04109, Leipzig, Germany 2. Institut für Theoretische Physik, Technische Universit?t München, D-85747, München, Germany 3. Institut für Theoretische Physik, J.W. Goethe Universit?t Frankfurt, Postfach 11 19 32, D-60054, Frankfurt, Germany |
| Abstract: | The small x behaviour of the structure function h 1 (x, Q 2) is studied within the leading logarithmic approximation of perturbative QCD. There are two contributions relevant at small x. The leading one behaves like (1/x)0 i.e. it is just a constant in this limit. The second contribution, suppressed by one power of x, includes the terms summed by the GLAP equation. Thus for h 1 (x, Q 2) the GLAP asymptotics and Regge asymptotics are completely different, making h 1(x, Q 2) quite an interesting quantity for the study of small x physics. |
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