High-energy physics

80th Birthday Celebration: Malcolm Derrick
The High Energy Physics Division will host a Special HEP Division Seminar Thursday, May 9, at 2 p.m. in honor of Malcolm Derrick on his 80th Birthday.

Guest speaker Don Reeder from the University of Wisconsin-Madison will present "Tales from the Crypt: The Race to the Omega Minus."

Cake and coffee will be served following the seminar.

Malcom Derrick will present "Goodbye to All That: How Was Your War, Sir?"

Proton Spin Physics with STAR; Status and Prospects
Abstact:
Two main goals of the spin physics program with STAR at RHIC are to measure the polarization of gluons in the polarized proton and to delineate spin contributions from the light quarks and anti-quarks by flavor. The measurements are being made with collisions of longitudinally polarized protons at 200 and 500 GeV center-of-mass energy. In addition, intriguingly large spin effects have been observed in collisions with transversely polarized beams at forward pseudorapidities. I will discuss the status and outlook.

Clarence ChangApril 18, 2013

Physicist

Higgs Doublet Models in Light of LHC Data
Abstract:
There is strong evidence mounting that the new particle discovered by CMS and ATLAS at 125 GeV is a Higgs boson. I will review both traditional and general Higgs doublet models in light of LHC data and discuss prospects for further probing them at the LHC.

Are the Einstein Radii of Galaxy Clusters Consistent with LCDM
Abstract:
The discrepancy between the observed and predicted strong lensing properties of galaxy clusters present a source of tension for LCDM cosmology. However, more complete treatment of baryonic processes in simulations and self-consistent cluster selection may reduce this tension.
The Fundamentals of Global Warming Science
Abstract:
Although the basic physics of global warming due to anthropogenic release of CO2 has been understood for more than 100 years, a large portion of the U.S. population mistrusts scientists on this vital issue. In this talk, I will review the fundamentals of radiation transfer in the Earth/atmosphere system. The Ice Ages will be shown to be an excellent calibration tool for the response of the global temperature to forcing. I will review the latest temperature measurements of the surface and ocean, as well as the response of the polar ice sheets to the increased temperature.