High Energy Physics Seminars This Term

ics High Energy
Wednesday, August 23, 2017
3:30 PM
Physics Building, Room 204

"Available"
ics High Energy
Wednesday, August 30, 2017
3:30 PM
Physics Building, Room 204
RESERVED
ics High Energy
Wednesday, September 6, 2017
3:30 PM
Physics Building, Room 204

"Available"
ics High Energy
Wednesday, September 13, 2017
3:30 PM
Physics Building, Room 204

"Available"
ics High Energy
Wednesday, September 20, 2017
3:30 PM
Physics Building, Room 204
Reserved [Host: Chris Neu]
ics High Energy
Wednesday, September 27, 2017
3:30 PM
Physics Building, Room 204
Reserved [Host: Chris Neu]
ics High Energy
Wednesday, October 4, 2017
3:30 PM
Physics Building, Room 204
Elisa Todarello [Host: Peter Arnold]
University of Florida
"Is axion dark matter described by a classical scalar field?"
ABSTRACT:

Axion dark matter has the unique property of having extremely high quantum occupancy. This may lead to think that axion dark matter can be described in terms of a classical field.

The usual equations for the linear growth of density perturbations in the cold dark matter fluid can be obtained from the classical description of a self-gravitating scalar field in the non-relativistic regime, with differences appearing only on scales smaller than a critical length.

However, axion dark matter is expected to thermalize through gravitational self-interactions and to form a Bose-Einstein condensate. I will argue that the classical field approximation is in general not valid for thermalizing quantum fields, even in the large occupancy regime, and discuss the different evolution of a homogeneous condensate in classical and quantum field theory.

ics High Energy
Thursday, October 5, 2017
3:30 PM
Physics Building, Room 204
Note special date.
Reserved [Host: Chris Neu]
ics High Energy
Wednesday, October 11, 2017
3:30 PM
Physics Building, Room 204
Phillip Barbeau [Host: Craig Group]
Duke University
"Recent results from COHERENT"
 
 Slideshow (PDF)
SLIDESHOW:
ics High Energy
Wednesday, October 18, 2017
3:30 PM
Physics Building, Room 204
Reserved [Host: Chris Neu]
ics High Energy
Wednesday, October 25, 2017
3:30 PM
Physics Building, Room 204
RESERVED
ics High Energy
Wednesday, November 1, 2017
3:30 PM
Physics Building, Room 204
Lan Nguyen [Host: Bob Hirosky]
Notre Dame
"Constraints on interacting dark matter from small scale structure"
ABSTRACT:

In this talk we study the effects of interacting dark matter in the structure of galactic halos. The core-cusp problem remains as one of the unresolved challenges between observation and simulations in the standard CDM model for the formation of galaxies. Basically, the problem is that CDM simulations predict that the center of galactic dark matter halos contain a steep power-law mass density profile. However, observations of dwarf galaxies in the Local Group reveal a density profile consistent with a nearly at distribution of dark matter near the center. A number of solutions to this dilemma have been proposed. We discuss the possibility that the dark matter particles themselves self interact and scatter. The scattering of dark matter particles then can smooth out their profile in high-density regions. We also summarize a theoretical model as to how self- interacting dark matter may arise. We implement this form in simulations of self-interacting dark matter in models for galaxy formation and evolution. Constraints on properties of this form of self-interacting dark matter will be summarized.

ics Special Nuclear/ High Energy Seminar


Tuesday, November 7, 2017
3:30 PM
Physics Building, Room 204
Note special date.
Tommy O'Donnell [Host: Craig Group]
Virginia Tech
"Recent Results from CUORE"
ics High Energy
Wednesday, November 8, 2017
3:30 PM
Physics Building, Room 204

"Available"
ics High Energy
Wednesday, November 15, 2017
3:30 PM
Physics Building, Room 204

"Available"
ics High Energy
Wednesday, November 29, 2017
3:30 PM
Physics Building, Room 204
RESERVED

To add a speaker, send an email to ecd3m@Virginia.EDU Include the seminar type (e.g. High Energy Physics Seminars), date, name of the speaker, title of talk, and an abstract (if available). [Please send a copy of the email to phys-speakers@Virginia.EDU.]