Measurement of the Ratio of Charged and Neutral 𝐵 Mesons in Υ (4𝑆) Events via Partial Reconstruction of the Semileptonic Decays 𝛣̅⁰⟶𝐷^∗⁺ℓ⁻_𝜈̅ℓ and 𝛣̅⁻⟶𝐷^∗⁰ℓ_𝜈̅ℓ

The decays, <img width=119 height=32 align=center src=https://vtechworks.lib.vt.edu/bitstream/handle/10919/28846/image006.gif> and <img width=119 height=29 align=center src=https://vtechworks.lib.vt.edu/bitstream/handle/10919/28846/image008.gif> are studied using data collected at the CLEO II detector at the Cornell Electron Storage Ring. Both decays are identified using a partial reconstruction method where the <I>D<SUP>*</SUP></I> is detected only through a pion daughter from the decay <img width=64 height=25 align=center src=https://vtechworks.lib.vt.edu/bitstream/handle/10919/28846/image010.gif>. Because of the similarities in the analyses of the two modes, the ratio of the rates is measured in a way that is independent of the decay model, limited mainly by the uncertainty in the relative efficiency for detecting neutral and charged pions. This ratio is equivalent to the ratio of the product of production fraction and lifetime for charged and neutral B mesons, <img width=31 height=29 align=center src=https://vtechworks.lib.vt.edu/bitstream/handle/10919/28846/image012.gif>. It is combined with measurements of the lifetime ratio to obtain the ratio of charged and neutral B meson production at the Y(4S) resonance, <img width=175 height=29 align=center src=https://vtechworks.lib.vt.edu/bitstream/handle/10919/28846/image014.gif>.

Name thesis:degree_name

Ph. D.

Level thesis:degree_level

doctoral

Discipline thesis:degree_discipline

Physics

Department dc:contributor.department

Physics

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2000

Author dc:creator

• Godang, Romulus

Chairs dc:contributor.committeechair

• Kinoshita, Kay
• Piilonen, Leo E.

Committee members dc:contributor.committeemember

• Chang, Lay Nam
• Indebetouw, Guy J.
• Blecher, Marvin
• Abashian, Alexander

• Partial Reconstruction
• Semileptonic Decay
• B Meson

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Dc Identifier Other

etd-09012000-14080013

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/28846