Dear colleagues,
this Wednesday we have a colloquium about
Out-of-This-World Physics: Black Holes in the Lab, 26. Mai 2004
Greg Landsberg
Brown University
"If the scale of quantum gravity is as low as a TeV, as has been
proposed by Arkani-Hamed, Dimopoulos, and Dvali a few years ago, one of
its most dramatic manifestations would be copious production of
miniature black holes at the CERN's LHC accelerator, qualifying the
latter for a black-hole factory. These rapidly evaporating black holes
could serve as sensitive probes of quantum gravity effects, topology of
extra dimensions, and as a laboratory to produce new particles with the
mass ~100 GeV. I'll discuss black hole production and decay mechanisms
at future colliders and the opportunities for cosmic ray detectors to
observe black holes in ultra-high-energy cosmic ray collisions. Using
the Higgs boson as an example, I'll demonstrate that it can be found in
the decays of black holes as early as in the first hour of operation of
the LHC, even with incomplete detectors."
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch
Dear colleagues,
this Wednesday there will be no colloquium because of the holiday.
The next colloquium will be 26. May
Prof. Greg Landsberg
Brown University
"Out-of-This-World Physics: Black Holes in the Lab"
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch
Dear colleagues,
this Wednesday we have a colloquium about
Ultrafast electronic and structural changes in liquids probed by
Ultrafast X-ray Absorption Spectroscopy, 12. Mai 2004
Majed Chergui
EPFL
"The first event of any light induced process is the rearrangement of
charges, which in turn triggers structural changes in the system, be it
a solid, a molecule or a protein. Ultrafast laser spectroscopy allows to
follow in "real-time" the electronic and structural changes. However, in
the latter case the information has to be indirectly extracted. Ideally,
a tool is needed that delivers information about both the structural and
electronic structure on the time scale over which they take place. We
have recently developed a pump-probe scheme based on the use of
femtosecond lasers coupled to ultrashort picosecond X-ray pulses from a
synchrotron, and studied the photoinduced cycle of a coordination
chemistry complex, Ruthenium-tris-bipyridine, in aqueous solutions.
X-ray Near-edge spectroscopy (XANES) delivers a high degree of insight
into the changes of the valence orbitals of the metal atom, while the
Extended X-ray Absorption Fine Structure (EXAFS) delivers information
about the structural changes. Our results will be presented and compared
to simulations of the spectra. In addition, we also demonstrate an
optical-X-ray cross-correlator with femtosecond resolution to be used
with future sources."
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch
Dear colleagues,
this Wednesday we have a colloquium about
Kinematics, Equilibrium and Shape
by L.A. Bunimovich
Georgia Institute. of Technology
"Consider a gas of N identical particles inside a container. Then we
would expect that after a sufficiently long time the particles will
occupy the entire container and will be distributed there uniformly. A
goal of this talk is to demonstrate that both these expectations are
generically not true. This seems to contradict to the basic principles
of statistical mechanics, but, in fact, it does not. This effect of the
container's shape is likely to be observable in a lab."
See also http://www.physik.unizh.ch/teaching/kolloquium.html for details.
--
Prof. Dr. Andreas Schilling
Physik-Institut der Universität Zürich
Winterthurerstrasse 190
CH-8057 Zürich (Switzerland)
Phone: +41 1 635 57 91
Fax: +41 1 635 57 04
schilling(a)physik.unizh.ch