Framework for Identification of Neutral B Mesons

We introduce a method for the study of CP-violating asymmetries in tagged states of neutral $B$ mesons with arbitrary coherence properties. A set of time-dependent measurements is identified which completely specifies the density matrix of the initial state in a two-component space with basis vectors $B^0$ and $\overline B^0$, and permits a determination of phases in the Cabibbo-Kobayashi-Maskawa matrix. For a given tagging configuration, the measurement of decays both to flavor eigenstates and to CP eigenstates provides the necessary information.Comment: Submitted to Phys. Rev. Letters. 8 pages, LaTeX, Technion-PH-93-31 / EFI 93-3

Isoscalar-isovector mass splittings in excited mesons

Mass splittings between the isovector and isoscalar members of meson nonets arise in part from hadronic loop diagrams which violate the Okubo-Zweig-Iizuka rule. Using a model for these loop processes which works qualitatively well in the established nonets, I tabulate predictions for the splittings and associated isoscalar mixing angles in the remaining nonets below about 2.5 GeV, and explain some of their systematic features. The results for excited vector mesons compare favorably with experiment.Comment: 8 RevTeX pages, including 1 LaTeX figure. CMU-HEP93-23/DOE-ER-40682-4

The Ursinus Weekly, October 19, 1936

Rec center plans near completion • Senior week-end leaders chosen • Fighting grizzlies stalemate powerful Roses; bears click on all eleven to spring upset • Capacity crowds expected to see human history film • Turkey day games to be played at F. and M. for five years • Curtain Club to produce two plays for road trips • Social science fellowships open to seniors and grads • Vogue magazine has career contest for senior co-eds • Pres. McClure to speak at dinner as guest of honor • Group of alumni, faculty form library aid society • Curtain Club to present Hedgerow Players in Shakespeare\u27s Twelfth Night on November 14, the first of series of three plays to be given at Ursinus • Deaths of three related to faculty, alumni, during week • Alumni come back strong on annual Old Timers\u27 Day • Kellett\u27s freshmen swamp Malvern Prep in first cub grid tilt by 31-2 score • Bear booters beaten 5-1 by F. and M. in third try • Sophs eke out victory in opening interclass hockey • McAvoy\u27s bears, Julian\u27s Mules to meet at Allentown Saturday • Many students, much spirit at bear-roses pep rally • Fall net tourney moves toward quarter-finals; progress slow • Brodbeck, Derr undefeated, lead intramural football • It is really the girl who makes the conquest, says co-ed as Weekly reporter continues survey on collegii amatoria • Injured student improvinghttps://digitalcommons.ursinus.edu/weekly/1908/thumbnail.jp

An interacting quark-diquark model of baryons

A simple quark-diquark model of baryons with direct and exchange interactions is constructed. Spectrum and form factors are calculated and compared with experimental data. Advantages and disadvantages of the model are discussed.Comment: 13 pages, 3 eps-figures, accepted by Phys.Rev. C Rapid Communication

U-Spin Symmetry in Doubly Cabibbo-Suppressed Charmed Meson Decays

We prove a U-spin amplitude triangle relation among doubly Cabibbo-suppressed (DCS) charmed meson decays, $D^0\to K^+\pi^-, D^0 \to K^0\pi^0$ and $D^+_s \to K^0 K^+$, congruent to an isospin relation among corresponding Cabibbo-favored (CF) decays. U-spin breaking in relative phases between CF and DCS amplitudes affects time-dependent studies of D^0-\od mixing. Comparison of final state phase patterns in DCS and CF amplitude triangles, which can shed some light on these phases, is carried out in a phenomenological framework incorporating resonance contributions.Comment: Two references updated, to appear in Phys. Lett.

Beyond the relativistic mean-field approximation (II): configuration mixing of mean-field wave functions projected on angular momentum and particle number

The framework of relativistic self-consistent mean-field models is extended to include correlations related to the restoration of broken symmetries and to fluctuations of collective variables. The generator coordinate method is used to perform configuration mixing of angular-momentum and particle-number projected relativistic wave functions. The geometry is restricted to axially symmetric shapes, and the intrinsic wave functions are generated from the solutions of the relativistic mean-field + Lipkin-Nogami BCS equations, with a constraint on the mass quadrupole moment. The model employs a relativistic point-coupling (contact) nucleon-nucleon effective interaction in the particle-hole channel, and a density-independent $\delta$-interaction in the pairing channel. Illustrative calculations are performed for $^{24}$Mg, $^{32}$S and $^{36}$Ar, and compared with results obtained employing the model developed in the first part of this work, i.e. without particle-number projection, as well as with the corresponding non-relativistic models based on Skyrme and Gogny effective interactions.Comment: 37 pages, 10 figures, submitted to Physical Review