Open charm meson spectroscopy: Where to place the latest piece of the puzzle

We discuss how to classify the $c{\bar s}$ meson $D_{sJ}(3040)$ recently discovered by the BaBar Collaboration. We consider four possible assignments, together with signatures useful to distinguish among them.Comment: RevTeX, 5 pages, 1 eps figur

Spartan Daily, February 22, 1940

Volume 28, Issue 93https://scholarworks.sjsu.edu/spartandaily/3040/thumbnail.jp

The newly observed open-charm states in quark model

Comparing the measured properties of the newly observed open-charm states D(2550), D(2600), D(2750), D(2760), D_{s1}(2710), D_{sJ}(2860), and D_{sJ}(3040) with our predicted spectroscopy and strong decays in a constituent quark model, we find that: (1) the $D(2\,^1S_0)$ assignment to D(2550) remains open for its too broad width determined by experiment; (2) the D(2600) and $D_{s1}(2710)$ can be identified as the $2\,^3S_1$-$1\,^3D_1$ mixtures; (3) if the D(2760) and D(2750) are indeed the same resonance, they would be the $D(1\,^3D_3)$; otherwise, they could be assigned as the $D(1\,^3D_3)$ and $D^\prime_2(1D)$, respectively; (4) the $D_{sJ}(2860)$ could be either the $D_{s1}(2710)$'s partner or the $D_s(1\,^3D_3)$; and (5) both the $D_{s1}(2P)$ and $D^\prime_{s1}(2P)$ interpretations for the $D_{sJ}(3040)$ seem likely. The $E1$ and $M1$ radiative decays of these sates are also studied. Further experimental efforts are needed to test the present quarkonium assignments for these new open-charm states.Comment: 26 pages,7 figures, journal versio

Kesan Saliniti dan Keamatan Cahaya ke atas Pertumbuhan Chiorella virginica

A study on the effects of salinity and light intensity on the growth of Chlorella virginica was conducted in an environmental control room at a temperature of 22 ±;Pc. Salinities were set at 15 ppt, 20 ppt, 25 ppt and 30 ppt while light intensities were at 1140 lux, 2260 lux and 3040 lux. The effect of salinity and light intensity was found to be significantly different (P <0. 01 - 0.05). Optimum salinity for the growth of Chlorella virginica was at 15 ppt whilst optimum light intensity was at 3040 lux. Interaction between salinity and light intensity was also significantly different (P <0.01 - 0.05) whereby maximum growth (39375 cells/pJ) was obtained at a salinity of 15 ppt and light intensity of 3040 lux

Alaska's Citizens Lock Out Private Prisons

Since the mid-1990s - through six legislative sessions and three gubernatorial administrations - Alaska's lawmakers have made more than a half dozen attempts to privatize prisons. These attempts have met with unfavorable public opinion. To date, the strength of public opposition has prevailed, and all private prison proposals have been defeated.Fast FactsStaying true to her campaign promise not to accept campaign contributions from Veco Corp, Gov. Sarah Palin received no money from the private-prison advocate and Alaskan oil field and services company during her 2006 gubernatorial race

Book Review of Jeffrey W. Vincoli, Risk Management for Hazardous Chemicals (1996) and Andre R. Cooper, Sr., Cooper\u27s Toxic Exposures Desk Reference (1997)

Book reviews for the following: Jeffrey W. Vincoli, Risk Management for Hazardous Chemicals (2 vols. CRC Lewis Publishers 1996). Acknowledgments, author, Chemical Abstracts Number index, chemical name index, introduction, preface, references, structure diagrams, tables. LC 96-35282, ISBN 1-56670-200-3 [3040+ pp. Cloth $297.00,$9.95 shipping. 2000 Corporate Blvd., N.W. Boca Raton, FL 33431.] Andr6 R. Cooper, Sr., Cooper\u27s Toxic Exposures Desk Reference (CRC Lewis Publishers 1997). Chemical Abstracts Number index, chemical name index, introduction, synonyms and trade name index, tables. LC 96-35221, ISBN 1-56670-220-8 [2006+ pp. Cloth $199.00,$9.95 shipping.

Effect of thermodynamics on ion mixing

Ion mixing of elemental 4d-5d metallic bilayers at 77 K by 600 keV Xe + + ions has been studied to test the validity of the phenomenological model of ion mixing that predicts a dependence on the chemical heats of mixing, DeltaHmix, and on the cohesive energies, DeltaHcoh, of the bilayer elements. A series of samples was chosen to minimize the variation in kinematical properties between samples while maximizing the variation in heats of mixing. The experimental results agree well with the model's predictions, and the experimentally determined constants K1=0.034 Å and K2=27 agree with those of previous work