Re: Seminar information for this week (fwd)

[Elton Smith <elton@jlab.org>]

These people are interviewing for the post-doc position at OU to work on
the FDCs.

Cheers, Elton.


On Mon, 19 Apr 2004, Daniel S. Carman wrote:

>
>
> Douglas,
>
> The names of the speakers for this week's seminars on Thursday
> and Friday at 11:00 a.m. are Simon Taylor (MIT) and Michael
> Ispiryan (Univ. of Houston).  I include their full titles and
> abstracts below.  Please advertise these talks so that we can
> get some a reasonable audience.  Note that Weidong Li from UVa
> has cancelled his interview as he accepted another position.
> Let me know if you have any questions.
>
> 				Daniel
>
> *********************************************************************
>
> Thursday seminar at 11:00 a.m.
>
> Simon Taylor: Massachusetts Institute of Technology
>
> Title: Measurement of Radiative Widths for the $\Sigma(1385)$ and
> $\Lambda(1520)$ Hyperons".
>
> Abstract:
>
> Although the excited state hyperons $\Sigma(1385)$, $\Lambda(1405)$,
> and $\Lambda(1520)$ were discovered more than 30 years ago, the wave
> functions of these states are not well understood.  Numerous models
> exist attempting to describe these hyperons.  By studying electromagnetic
> transitions, which are sensitive to the details of the hyperon wave
> functions, one can attempt to distinguish between these models.
>
> The electromagnetic decays of the $\Sigma(1385)$ and $\Lambda(1520)$
> hyperons were studied in photo-produced reactions in the CLAS detector
> at the Thomas Jefferson National Accelerator Facility.  I report the
> first observation of the radiative decay of the $\Sigma(1385)$.  The
> partial width is  $516\pm96(stat)^{+137}_{-110}(sys)$ keV, larger than
> most of the existing model predictions.  I also report a measurement of
> the $\Lambda(1520)\rightarrow\Lambda\gamma$ transition, for which I
> obtained a partial width of $172\pm39(stat)^{+27}_{-35}(sys)$ keV.
>
> *********************************************************************
>
> Friday seminar at 11:00 a.m.
>
> Michael Ispiryan: University of Houston
>
> Title: A-Dependence of Phi Meson Production at HERA-B in 920 GeV
>        Proton-Nucleus Collisions
>
> Abstract:
>
> During the two run periods of HERA-B at DESY, enough data was
> obtained to investigate several topics of high energy hadron
> physics. The spectrometer, critical parts of which are the
> targets, the silicon vertex detector, the RICH and the outer
> tracker were built after years of R&D. Having two fixed targets
> made of different materials in the same run allows us to eliminate
> the majority of errors associated with Monte Carlo simulation of
> the detector, and arrive at the A-dependence of phi meson production
> in an inelastic interaction. The main result obtained is that the
> power law A^0.15 fits the obtained production dependence on
> atomic weight.
>
> *********************************************************************
>
> **********************************************************************
> *                                                                    *
> * Dr. Daniel S. Carman                   e-mail : carman@ohio.edu    *
> * Ohio University                        office : (740)-593-2964     *
> * Department of Physics                  fax    : (740)-593-1436     *
> *                                                                    *
> **********************************************************************
>
>
>