April 10, 2006 (Monday) Dave Soper, University of Oregon
April 17, 2006 (Monday) Dave Mason, University of Oregon
April 24, 2006 (Monday) Shufang Su, University of Arizona
May 18, 2006 (Thursday) George Gollin, University of Illinois at Champaign-Urbana
May 22-26, 2006 (Monday-Friday) UltraMini Workshop on Cosmology and Astrophysics
June 5, 2006 (Monday) Jim Brau, University of Oregon
4:00 pm, 472 Willamette Hall
Refreshments served at 3:45
Refreshments served at 3:45
We investigate the superWIMP scenario in the framework of supergravity, in which the lightest supersymmetric particle (LSP) is a stable gravitino and a slepton, sneutrino or neutralino is the next-to-lightest supersymmetric particle (NLSP). The NLSP freezes out with its thermal relic density. It then decays to the gravitino at time around 10^4 to 10^8 sec. Big Bang nucleosynthesis (BBN) and the cosmic microwave background imply significant bounds. We determine which superpartner masses are viable in all of these cases. This establishes the viability of the gravitino LSP scenario and the possibility of superWIMP gravitino dark matter. We then discuss the collider phenomenology of supergravity with a gravitino LSP.
4:00 pm, 472 Willamette Hall
Refreshments served at 3:45
Feel free to join George and the HEP group at 12 noon in 472 Willamette Hall for discussion.
George Gollin will also be presenting the Physics Colloquium at 4pm.
Refreshments served at 3:45