Kinematic fitting of detached vertices

The eg3 experiment at the Jefferson Lab CLAS detector aims to determine the existence of the &Xgr;5 pentaquarks and investigate the excited &Xgr; states. Specifically, the exotic X--5 pentaquark will be sought by first reconstructing the X- particle through its weak decays, X- → pi- and &Lgr; → ppi -. A kinematic fitting routine was developed to reconstruct the detached vertices of these decays, where confidence level cuts on the fits are used to remove background events. Prior to fitting these decays, the exclusive reaction gammaD→ pppi- was studied in order to correct the track measurements and covariance matrices of the charged particles. The &Lgr; → ppi- and xi- → pi -&Lgr; decays were then investigated to demonstrate that the kinematic fitting routine reconstructs the decaying particles and their detached vertices correctly.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Natural Sciences

Grantor

Rice University

Year dc:date.issued

2007

Author dc:creator

• Mattione, Paul

Advisor dc:contributor.advisor

• Mutchler, Gordon S.

• Nuclear physics
• Particle physics
• Elementary particles
• High energy physics

Statement dc:rights

• Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/1911/20522

OAI identifier oai:identifier

oai:repository.rice.edu:1911/20522