Spacings of Quarkonium Levels with the Same Principal Quantum Number

The spacings between bound-state levels of the Schr\"odinger equation with the same principal quantum number $N$ but orbital angular momenta $\ell$ differing by unity are found to be nearly equal for a wide range of power potentials $V = \lambda r^\nu$, with $E_{N \ell} \approx F(\nu, N) - G(\nu,N) \ell$. Semiclassical approximations are in accord with this behavior. The result is applied to estimates of masses for quarkonium levels which have not yet been observed, including the 2P $c \bar c$ states and the 1D $b \bar b$ states.Comment: 20 pages, latex, 3 uuencoded figures submitted separately (process using psfig.sty

The Grizzly, September 15, 2005

Gas Prices Continue to Rise • Campus and Local Community Begin Relief Efforts • Students Share Study Abroad Experiences • The Deal with the Meal Deal • One of Ursinus\u27 Own Performs Professionally • Watch Out, Employers: You Could be Next! • How Much is Too Much? Your Guide to Avoiding Portion Distortion • Excitement Building in Kaleidoscope • Beyond the Condom: Guide to Safe Sex • Opinions: New Price of Driving; Ursinus, U are Worth it • Irony of Work Study • Things They Didn\u27t Teach You at Freshman Orientation • Who Says Division III Players Can\u27t Go Pro?https://digitalcommons.ursinus.edu/grizzlynews/1692/thumbnail.jp

Procedure for the fine delay adjustment of the CMS tracker

One of the crucial aspects of the commissioning of the CMS silicon tracker will be the absolute timing adjustment of each module, to accommodate both delays introduced by the hardware configuration and effects due to the time of flight of particles. The objective is to be optimally synchronized with the bunch-crossing to maximize the efficiency while minimizing the number of remnant hits from the adjacent bunch-crossings. In the present note, a procedure to reach that goal is studied. Monte Carlo studies as well as the analysis of data from the commissioning of the detector are used to assess the time needed and the resolution that can be achieved. Critical aspects are discussed, and results from the first implementation are presented