Events at Physics
Events on Thursday, May 5th, 2016
- Cosmology Journal Club
- An Informal discussion about a broad variety of arXiv papers related to Cosmology
- Time: 12:15 pm
- Place: 5242 Chamberlin Hall
- Abstract: Please visit the following link for more details:
Please feel free to bring your lunch!
If you have questions or comments about this journal club, would like to propose a topic or volunteer to introduce a paper, please email Amol Upadhye (email@example.com).
- Host: Amol Upadhye
- Astronomy Colloquium
- "Precision Stellar Astrophysics: Asteroseismology and Large Spectroscopic Surveys"
- Time: 3:30 pm
- Place: 4421 Sterling Hall, Coffee and cookies 3:30, Talk begins 3:45
- Speaker: Dr. Marc Pinsonneault, Ohio State University
- Abstract: Large time domain and spectroscopic surveys are revolutionizing stellar astrophysics. In this talk I will focus on the APOKASC project, involving a combination of asteroseismic and rotational data from the Kepler satellite and high-resolution H-band spectroscopy from APOGEE. Asteroseismology gives precise surface gravities and evolutionary state measurements, and the frequency pattern combined with spectroscopic data can also be used to independently measure mass, radius, and age. I critically assess the performance of asteroseismology against independent measurements, and also discuss the prospects for detailed tests of stellar physics (helium, convection zone depth, core mass and rotation.) Insights into stellar populations, such as spectroscopic mass estimates and an unexpectedly large fraction of young alpha-rich stars, will also be covered. Future and ongoing missions will be reviewed, and synergies with Gaia will be discussed.
- Host: Professor Robert Mathieu
- Theory Seminar (High Energy/Cosmology)
- Electroweak inos, natural SUSY and HL-LHC
- Time: 3:30 pm
- Place: 5310 Chamberlin Hall
- Speaker: Howard Baer
- Abstract: Recent clarifications in naturalness require light higgsinos ~100-200 GeV while stops are highly mixed but can lie in the multi-TeV range at little cost to naturalness. These qualities means the expected mass hierarchy of electroweak-inos is inverted from the usual case in that higgsinos lie at the lower mass rungs while gauginos lie at higher mass. Qualitatively new signatures for SUSY discovery at LHC then appear. Gluino pair cascade decays should contain distinctive low invariant mass dilepton pairs. A new same-sign diboson signature emerges from wino pair production which should provide the greatest reach for HL-LHC in the gaugino mass direction. Soft dilepton pairs from higgsino pair production recoiling againsthard jets should give HL-LHC reach in the higgsino mass direction. It appears that 3000 fb-1 should be sufficient to cover natural SUSY parameter space with better than 3% electroweak fine-tuning. I also mention implications of naturalness for ILC searches and for higgsino-like WIMP and axion dark matter searches.
- Host: Vernon Barger
- Careers for Physicists
- Career Panel with Physics Board of Visitors Members
- Time: 4:30 pm
- Place: 2241 Chamberlin Hall
- Speaker: Various BOV members
- Abstract: Career Panel for grads and undergrads
with Physics BOV members including (but not limited to):
Greg Jaczko, former chair of the NRC
Tom Dillinger, Oracle
Bill Ho, Intellectual Property Development Consultant
- Host: Albrecht Karle