Date of Award


Document Type

Campus Access Dissertation


Physics and Astronomy



First Advisor

Ralf W. Gothe


This work studies the exclusive quasi-free photo-production of K + Σ∗− (1385) off neutrons in deuterium. It presents the first total cross section, σ , of this production channel as well as the differential cross section, dσ/dcosθCM. In order to understand the production mechanism, the angle distribution in the t-channel helicity frame (Gottfried-Jackson frame) is presented. The experiment was done in Hall B at the Thomas Jefferson National Laboratory (JLab) by using the CEBAF Large Acceptance Spectrometer (CLAS) detector system and the tagger system during the EG3 run period from December 2004 to February 2005. Tagged photons with energies from 1.5 to 5.5 GeV are measured in coincidence with K + p π-π- in the spectrometer for this channel. After careful detector calibration and developing a new particle identification method and event selection, a very clean data sample with high signal-to-background ratio was obtained with little data loss. This enables us to obtain results agreeing with previous published data and greatly extending the energy coverage.


© 2010, Haiyun Lu