Measurement of Exclusive Photo-Production of K+ Σ*- Quasi-Free off Neutrons In Deuterium

<p>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/dcosθ_CM. 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.</p>

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Campus Access Dissertation

Discipline thesis:degree_discipline

Physics and Astronomy

Year

2010

Author dc:creator

• Lu, Haiyun

Contributors dc:contributor

• Ralf W. Gothe

• Physical Sciences and Mathematics
• Physics
• baryon resonance
• hyperon
• photoproduction

Statement dc:rights

• © 2010, Haiyun Lu

Repository record dc:identifier

https://scholarcommons.sc.edu/etd/367

OAI identifier oai:identifier

oai:scholarcommons.sc.edu:etd-1368