When: Tuesday, September 1, 2015 1:30 PM - 2:30 PM Where: Wright Lab, EAL 108 Conference Room (EAL108) 268 Whitney Avenue, New Haven 06520 (Location is wheelchair accessible) Enter building through Wright Lab-West (268 Whitney). All other external doors are locked or blocked by construction. Tags: astrophysics, nuclear_physics, particle_theory, science, seminar, talk
Speaker/Performer: Stan Glazek, University of Warsaw
Description: When lepton-proton bound-state eigenvalue equations are derived from a local quantum field theory using second-order renormalization group procedure for effective particles (RGPEP) a la QCD for heavy quarkonia, the resulting non-perturbative corrections to the Schroedinger equation appear relevant to our understanding of the proton radius puzzle. The puzzle can be described as a conclusion that the proton radius in muon-proton bound states is smaller than in the electron-proton bound states by about 4%. The RGPEP indicates instead that the radii ought to be discussed taking into account the scale difference between the effective theories required for handling different bound-states using the same Schroedinger equation. Even more intriguing, the effective non-relativistic Schroedinger dynamics for lepton-proton atoms turns out to be operating in these very low-energy systems with the same type of momentum variables that also naturally appear in the light-front holography for quark-antiquark states and in the interpretation of AdS/QFT duality in terms of the Ehrenfest theorem.
When: Friday, May 15, 2015 2:00 PM - 3:00 PM Where: Wright Lab, EAL 108 Conference Room (EAL108) 268 Whitney Avenue, New Haven 06520 (Location is wheelchair accessible) Enter building through Wright Lab-West (268 Whitney). All other external doors are locked. Tags: astrophysics, nuclear_physics, particle_theory, science, seminar, talk
Speaker/Performer: Francesco D'Eramo, UC Berkeley
Description: A Weakly Interacting Massive Particle (WIMP) is a well-motivated dark matter (DM) candidate that can be searched for by different experimental strategies. In this talk, I will review the complementary WIMP searches, emphasizing how they are sensitive to physics at vastly different energy scale. Crucially, such a separation of scales may have striking consequences when a connection between different experiments is attempted. This motivates the construction of an Effective Field Theory (EFT) framework to properly connect the different energy scales involved in constraining WIMP models. I will build such a formalism and I will apply it to derive model independent bounds on WIMP interactions. I will conclude with possible future directions, both on extending the EFT machinery and applications to specific models.
Open To: Yale Community Only Contact Information: John Harris