Events List

DateEvent TypeSpeaker
03/01/2024Hep Th Discussion GroupPopov [ + ]
03/01/2024HEP Discussion SessionsZare [ + ]
03/04/2024CCPP Brown BagGabriel Cuomo [ + ]
03/04/2024Informal HEP TalkThomas Steingasser [ + ]
03/04/2024Informal HEP TalkFiona Seibold [ + ]
03/05/2024Astro SeminarBen Farr [ + ]
03/05/2024Grad Pheno Journal Club [ + ]
03/06/2024ArXiv DiscussionHEP/Pheno Journal Club [ + ]
03/06/2024HEP SeminarLuca Delacrétaz [ + ]
03/08/2024Hep Th Discussion GroupPopov [ + ]
03/08/2024Informal HEP TalkFederico Ambrosino [ + ]
03/08/2024HEP Discussion SessionsZare [ + ]
03/11/2024CCPP Brown BagCameron Norton [ + ]
03/12/2024Astro SeminarAdrian Bayer [ + ]
03/12/2024Grad Pheno Journal Club [ + ]
03/13/2024HEP SeminarClaudio Andrea Manzari [ + ]
03/14/2024EPP Job TalkTova Holmes [ + ]
03/14/2024Informal HEP TalkXingyang Yu [ + ]
03/14/2024Physics Dept ColloquiumAbhay Narayan Pasupathy [ + ]
03/15/2024Hep Th Discussion GroupPopov [ + ]
03/19/2024Grad Pheno Journal Club [ + ]
03/20/2024ArXiv DiscussionHEP/Pheno Journal Club [ + ]
03/22/2024Hep Th Discussion GroupPopov [ + ]
03/22/2024Informal HEP TalkAlon Farragi [ + ]
03/22/2024Informal HEP TalkChris Hull [ + ]
03/25/2024CCPP Brown BagNeal Weiner [ + ]
03/25/2024Informal HEP TalkBingrong Yu [ -- ]

Title: Axion dark matter from inflation-driven quantum phase transition
Abstract: We propose a new mechanism to produce axion dark matter from inflationary fluctuations. Quantum fluctuations during inflation are strengthened by a coupling of the axion kinetic term to the inflaton. This coupling acts as an order parameter, breaking the scale invariance of the axion power spectrum and driving a quantum phase transition. A red-tilted spectrum leads to an exponential enhancement of the axion abundance as the comoving horizon shrinks during inflation. This enhancement allows sufficient axion production to comprise the entire dark matter abundance, despite the ultralight mass. Our mechanism predicts a significantly different parameter space from the usual misalignment mechanism, allowing much larger couplings to Standard Model particles, which can be probed by future axion experiments. It is applicable to both QCD axion and axion-like particles. (2:00 PM - 3:00 PM, 726 Broadway, 940, CCPP Seminar)
03/26/2024Astro SeminarKen Van Tillburg [ + ]
03/26/2024Grad Pheno Journal Club [ + ]
03/27/2024HEP SeminarTony Gherghetta [ + ]
03/28/2024Physics Dept ColloquiumArjun Yodh [ + ]
03/29/2024Hep Th Discussion GroupPopov [ + ]
03/29/2024Oral DefenseReza Javadi Nezhad [ + ]
03/29/2024HEP Discussion SessionsZare [ + ]