Speaker: Andre Frankenthal (UC Irvine)
Title: Searching for X17: First Results from the PADME Experiment
Room: 285
Host: Matthew Citron
Abstract: The PADME experiment is a fixed-target high-energy physics setup located in Frascati, Italy, originally designed to search for dark photon production via collisions between a positron beam and a thin diamond target. In 2022, the experiment was adapted for a timely search for the X17 particle, a hypothetical boson with a mass around 17 MeV, motivated by anomalies observed in nuclear transitions of beryllium, helium, and carbon atoms. We present the results from this first dedicated search for the X17, revealing a mild excess of events near the expected 17 MeV center-of-mass energy. The talk will cover the experimental setup of PADME, the theoretical motivation for X17, details of the collected dataset, and plans for future data taking aimed at confirming or refuting the X17 hypothesis.
User:
High-Energy Seminars
Time:
1:30pm - 3:00pm
Description:
Speaker: Digvijay Varier (UC Berkeley)
Title: Anomaly-Mediated SUSY Breaking in QCD-like SU(N) and Sp(N) Gauge Theories
Room: 3024
Host: John Terning
Abstract: We present an analytical derivation of the chiral symmetry breaking minima in supersymmetric asymptotically-free SU(N) and Sp(N) gauge theories with F flavors of “quarks”, perturbed by Anomaly Mediated Supersymmetry Breaking. Applying AMSB to the ADS, quantum-modified, s-confining, free magnetic and conformal phases of these theories, we are able to show that almost all of them possess stable chiral symmetry breaking minima that could plausibly be continuously connected to the vacua of QCD-like theories in the complete SUSY breaking limit. In the Sp(N) all the global minima have are calculable. There are no tree-level runaways as baryons are absent, and directions with tachyonic dual squarks are naturally stabilized (to give local minima) by quartic tree-level SUSY potentials.
