Event Category: Particle Seminar

Particle Seminar:
Wednesdays 2:00pm at LBNL

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Title: Neural Network Field Theory: Fermions and Supersymmetry Abstract:  Based on a duality between Neural Network (NN) architectures, the backbone of modern AI/ML, and field theory, the Neural Network Field Theory (NNFT) correspondence offers a robust, interpretable, and training-free simulation framework for scalar, fermionic, and supersymmetric field theories. By constraining NNs in a maximally physics-informed manner, this approach eliminates the need for … Read More

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Title: Towards a Field Redefinition Invariant Description of Effective Field Theories Abstract: Physical observables are invariant under field redefinitions, motivating a geometric formulation of Effective Field Theories. I will first review the scalar field-space geometry, where scalar fields are treated as coordinates on a Riemannian manifold, and show how this perspective simplifies calculations involving higher-dimensional operators, particularly in the context … Read More

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Title: Not–quite–primordial black holesAbstract: In this talk, I will discuss a new mechanism for the formation of seeds of supermassive black holes at early cosmic epochs. Enhanced density fluctuations with amplitudes that are not large enough to form primordial black holes post-inflation can still lead to collapsed dark matter halos at very early times. For halos forming prior to 1+z ~ 200, the Cosmic Microwave Background (CMB) … Read More

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Talk title: Higher Axions Abstract: A large fraction of the experimental efforts searching for the (QCD) axion focus on smaller-scale, time-intensive, resonant searches. These searches would greatly benefit from a precise estimate of the axion mass. In theory, the axion mass can be inferred from the observed dark matter abundance and numerical simulations point towards an axion mass (slightly) higher … Read More