- New York University, Feb. 2016
- York University, Dec. 2015
- Ludwig Maximilian University, Munich, Jul. 2015
- University of Chicago, April 2015
- University of California, Santa Barbara, Jun. 2013
- Caltech, Jun. 2013
- Cornell University, May 2012
- University of California, Davis, Apr. 2012
- University of California, Berkeley, Apr. 2012
- University of California, Berkeley, Mar. 2012
- University of Colorado, Boulder, Feb. 2012
- CERN, Jan. 2012
- Universidad Autónoma, Madrid, Apr. 2011
- Boston University, Feb. 2010
- UCLA, Apr. 2009
- Rockefeller University, Nov. 2008
- Fermilab Chicago, Oct. 2008
- University of California, San Diego, May 2008
- Caltech, Apr. 2008
- The Michigan Center for Theoretical Physics, Jan. 2008
- University of California, Berkeley, Oct. 2007
- Harvard University, Oct. 2007
- Indiana University, Mar. 2007
- University of Chicago, Oct. 2006
- Perimeter Institute Colloquium, Mar. 2006
- Fermilab Colloquium, Feb. 2006
- CERN, Jan. 2006
- University of California, Davis, Dec. 2005
- University of California, Santa Cruz, Nov. 2005
- Yale University, 2004
- Duke University, Triangle Nuclear Theory Group, 2002
- Columbia University, 2002
- Princeton University, 2001
- Fermilab, 2001
- University of Chicago, 2000
- Brandeis University, 2000
- University of California, Santa Cruz, 1999
- University of California, Santa Barbara, 1999
- Caltech, 1997
- Harvard University, 1996, 2000, 2001
- MIT, 1996, 1999
- Case Western Reserve, 1996, 1998
- Northwestern University, 1996
- New York University, 1995, 2001, 2004
- University of Illinois, Urbana-Champaign, 1993