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First observation of the direct detection of positive D-meson into anti-K-long + 3 pions and negative D-meson into K-long + 3 pions with the Fermilab FOCUS experiment

dc.contributor.advisorJohns, Will E.
dc.contributor.authorStewart, Cameron
dc.date.accessioned2014-08-06T18:00:03Z
dc.date.available2014-08-06T18:00:03Z
dc.date.issued2014-04
dc.identifier.urihttp://hdl.handle.net/1803/6630
dc.description.abstractIn this thesis the decays of positive D-mesons into neutral anti-K-mesons and three charged pions and of negative D-mesons into neutral K-mesons and three charged pions are reconstructed in both long and short neutral K-meson states. The data were taken with the Fermilab FOCUS spectrometer. This constitutes the first observation of these decays in the long K-meson mode. We detail the cuts necessary to find the branching ratio for the K-long to K-short modes for both positive and negative D-mesons, show that the ratio is 0.89, and detail further work that remains to be done. The K-long mode is reconstructed using the D-meson flight direction, the direction of the charged pions, and the energy deposited in the hadron calorimeter. The K-short decay is reconstructed directly using tracking information in the pi plus - pi minus decay mode.en_US
dc.language.isoen_USen_US
dc.publisherVanderbilt University. Department of Physics and Astronomyen_US
dc.rightsCC0 1.0 Universal*
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/*
dc.subjectD-meson branching ratioen_US
dc.subjectK-longen_US
dc.subjectK-shorten_US
dc.subjectFOCUS experimenten_US
dc.subject.lcshMesons -- Decayen_US
dc.subject.lcshMesonsen_US
dc.subject.lcshKaonsen_US
dc.subject.lcshPionsen_US
dc.subject.lcshFermi National Accelerator Laboratoryen_US
dc.titleFirst observation of the direct detection of positive D-meson into anti-K-long + 3 pions and negative D-meson into K-long + 3 pions with the Fermilab FOCUS experimenten_US
dc.typeThesisen_US
dc.description.collegeCollege of Arts and Scienceen_US
dc.description.departmentDepartment of Physics and Astronomyen_US


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CC0 1.0 Universal
Except where otherwise noted, this item's license is described as CC0 1.0 Universal