Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Description:
Joint Theory Seminar
Speaker:
Title:
Host:
Room:
Abstract:
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Description:
Joint Theory Seminar
Speaker: Lasma Alberte (ICTP Trieste)
Title: Equivalence principle in scalar-tensor theories
Host: Xiaochuan Lu
Room: 432
Abstract: We study the question of whether the equivalence principle holds for extended objects moving on cosmological backgrounds in scalar-tensor theories of modified gravity. We do so within the framework of effective field theory of dark energy focusing in particular on the subclass corresponding to the Horndeski theories. These are the most general second order scalar-tensor theories with non-linear derivative self-interactions of the scalar allowing for the Vainshtein screening mechanism to operate at small scales. We show how the approximate shift symmetry of the action, together with the special derivative structure of the scalar self-interactions insures that the equivalence principle is obeyed for screened extended objects with negligible self-gravitational energy.
User:
High-Energy Seminars
Time:
7:30am - 8:30am
Description:
Joint Theory Seminar
Speaker: Davide Racco (University of Geneva)
Title: Some recent results for Effective Theories and Simplified Models for Dark Matter
Host: Christopher Verhaaren
Room: 432
Abstract: Among the possible explanations for Dark Matter, in the last years the WIMP candidate has been the main candidate to look for, given the feasibility of its experimental search (direct and indirect detection, and collider searches). In the last years, the community has been discussing the role of effective field theories and simplified models with regard to this issue. I will present some new results on the use of EFT for collider searches, and the crucial issues of complementarity of DM searches and internal consistency within simplified models.
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: Sal Lombardo
Title: Continuum Naturalness
Host: John Terning
Room: 432
Abstract: The LHC has put the naturalness paradigm under pressure since one generally expects new colored resonances at the TeV scale to address the hierarchy problem. There exists another possibility, however. New dynamics responsible for furnishing a pseudo-goldstone composite Higgs may have a gapped continuum of colored excitations, in which case the top partners and vector resonances appear as branch cuts rather than poles in scattering amplitudes. The new colored states in this scenario cannot be described as Breit-Wigner resonances, drastically changing their LHC phenomenology. I will present a model in which a fermionic top partner continuum cuts off the quadratic divergence of the Higgs mass and show that direct experimental constraints on such a scenario can be weakened relative to traditional composite Higgs models.
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
User:
High-Energy Seminars
Time:
6:30am - 7:30am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker:
Title:
Host:
Room: 432
Abstract:
Description:
Halloween
User:
High-Energy Seminars
Time:
9:10am - 10:10am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
High Energy Seminar canceled due to Chancellors Reception and Halloween
