Date of Award
Campus Access Dissertation
Physics and Astronomy
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.
Lu, H.(2010). Measurement of Exclusive Photo-Production of K+ Σ*- Quasi-Free off Neutrons In Deuterium. (Doctoral dissertation). Retrieved from http://scholarcommons.sc.edu/etd/367