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Investigation of novel effects in semi-inclusive deep inelastic scattering

by Dvoredsky, Andrea Paulina

Abstract (Summary)
NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Azimuthal distributions in hadron production were measured in unpolarized deep inelastic scattering with unpolarized light gas targets. For pions, measurements of [...] are consistent with previous measurements at moderate [...] values, although at low [...], there are indications that simple kinematic models are insufficient to describe these data. This effect appears to be charge-independent. The [...] moment is extracted as well and at an average [...] of [...], a significant value for [...] of [...] is seen and decreases with [...]. In addition, first measurements are shown for the same azimuthal distributions in electroproduction of [...] and [...] and indicate that, unlike in pion production, the azimuthal moments for strange particles are much smaller. The 11 events are also used in a new search for spin transfer in deep inelastic scattering. Terms that depend on beam polarization are consistent with zero and show no clear kinematic variation, indicating that the polarized fragmentation function is small at these kinematics. On the other hand, the transverse polarization of [...] seen at [...] suggests that unpolarized transverse fragmentation functions grow with [...] and [...]; these measurements may be compared with hadroproduction data.
Bibliographical Information:

Advisor:Bob McKeown

School:California Institute of Technology

School Location:USA - California

Source Type:Master's Thesis

Keywords:physics

ISBN:

Date of Publication:09/29/1999

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