Measurement of branching ratio of the B decay to chic and kaon

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dc.creatorGu, Chunlin
dc.date.accessioned2016-11-14T23:23:51Z
dc.date.available2011-02-18T21:43:09Z
dc.date.available2016-11-14T23:23:51Z
dc.date.issued2000-08
dc.degree.departmentPhysicsen_US
dc.description.abstractWe report on a measurement of the branching ratio of the decay B"^ -> Xci (1-^)^ • Here "we" represents our HEP group, because this work is completed by me under the assistance of other members of our group. It is the first time that the B —> Xci(l-P)^''' decay is reconstructed in pp collisions, although it has been previously observed in e^e~ collisions. The data sample consists of 110 pb~^ of pp collisions at a center of mass energy of 1.8 TeV collected by the Collider Detector at Fermilab (CDF). This data was collected during Run I of the Tevatron from 1992 through 1995. The Xci(l-P) meson is reconstructed via the decay Xci(l^) —)• J/ip'j, and the J/-^ meson is reconstructed via the decay J/ip -^ /w"*"/^"- Signals of 18.7 ± 5.6 B^ -^ Xci(l-P)^^ events and 487.3±24.2 B'^ -> J/ipK^ events are observed. Using these numbers along with acceptance corrections calculated from detector simulations we determine the ratio of branching ratios BR(5+ -^ Xci(l^)^^)/BR(5+ - i J/^K^). Then by using the world average Particle Data Group (PDG) value for BR(5+ -)> J/ipK'^), we calculate the branching ratio BR(5+ ^ Xci(l^)^^) to be (9.0±3.0{stat)±l.2(sys))xl0-\ which has a comparable error to the value quoted in the PDG.
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2346/16778en_US
dc.language.isoeng
dc.publisherTexas Tech Universityen_US
dc.rights.availabilityUnrestricted.
dc.subjectB mesons -- Decay -- Measurementen_US
dc.subjectBranching ratios (Nuclear physics)en_US
dc.subjectFermi National Accelerator Laboratoryen_US
dc.titleMeasurement of branching ratio of the B decay to chic and kaon
dc.typeThesis

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