No description available.

No description available.

Thesis (Ph. D.)--University of Chicago, Department of Physics, December 2000. / Includes bibliographical references (p. 146-149). Also available on the Internet.

The production of charmed particles and a limit to tau lepton production have been measured using a hybrid emulsion spectrometer in the Fermilab wide-band neutrino beam. / The relative cross section for charged current charmed particle production is / (DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI) / and the energy dependence of the cross section and the kinematic distributions of the charm events are given. One event with charm pair production was observed. A limit of (sigma)((nu)(--->)(mu)cc)/(sigma)((nu)(--->)(mu)c) < 0.06 (90%C.L.) is set to the ratio of charged current pair and single charm production. The relative rates of D(DEGREES), D('+), F('+), and (LAMDA)(,c)('+) production have been measured--the fraction of D mesons is / (DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI) / Momentum, transverse momentum, Feynman X, and fragmentation (Z) distributions are presented. The mean Z for charmed hadrons is 0.59 (+OR-) 0.03((+OR-) 0.03). / No tau leptons were observed, and an upper limit to the (nu)(,(mu))-(tau) coupling of 0.0063 (90%C.L.) is set. For (nu)(,(mu))-(nu)(,(tau)) oscillations this implies / (DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI) / for maximum mixing.

Graduate

No description available.

The set of decays known as B⁰ → l⁺l⁻ are exceedingly rare. This thesis details procedures developed to optimize signal extraction and improve the upper limit on the measured branching fraction. When applied to 85 million BB events collected at the Belle experiment in Tsukuba, Japan, the resulting upper limits on branching fractions were 8.8×10⁻⁸ for B⁰ → e⁺e⁻, 1.0×10⁻⁷ for B⁰ → μ⁺μ⁻, and 8.5×10⁻⁸ for B⁰ → e±μ∓" at the 90% confidence level. / Ph. D.

Higher dimensional black holes are studied in the extra large dimensions scenario. Bulk fermion quasi-normal modes and bulk fermion Hawking emission is calculated. It is found that bulk emission dominates brane emission for d > 5. / To address the Planck phase an effective field theory is investigated. Lepton family number violating processes are elucidated and the corrections to the muon magnetic moment from these channels are calculated. Bounds are placed on the couplings of the theory. / A discrete symmetry between quarks and leptons, and left- right- chirality fields, is orbifolded in 5 dimensions. Using split fermions a one generational standard model extension is found. / An investigation of entanglement in black holes and accelerated motion is presented. It is found that in a certain system the acceleration between two spinors enhances the rate of their disentanglement.

Graduate

Thesis (Ph.D.)--Tufts University, 2004. / Adviser: Krzysztof Sliwa. Submitted to the Dept. of Physics. Includes bibliographical references (leaves 131-138). Access restricted to members of the Tufts University community. Also available via the World Wide Web;