standard model

standard model

Conformal Standard Model, Krzysztof Meissner

1mo ago
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I will describe a proposal of an enlargement of the Standard Model based on a softly broken conformal symmetry. It contains the usual particles of the SM with right-chiral neutrinos and predicts two new particles: a scalar mixing with the usual Higgs and a naturally weakly coupled axion. I will argue that the Planck scale should be treated as a real physical scale and discuss the hierarchy problem and renormalization from this point of view. I will show that the model does not need any intermediate scales and can be viable up to the Planck scale (in distiction to the Standard Model). I will present experimental predictions of the model. *** This talk was delivered during the conference “The Limits of Physics and Cosmology” organized by Copernicus Center for Interdisciplinary Studies. There exist various kinds of limits which are inherent in cosmological research and physics. The most conspicuous one is connected with scientific method itself. It manifests itself during attempts to construct (or discover) suitable mathematical structures to model the physical world. However, this limit may be even more profound. Over the past 300 years we have become accustomed to the mathematical and empirical method which has proven to be uncannily successful in describing the enclosing universe. But is there a fundamental limit to the method itself which is intrinsic to the structure of the world? Another group of limits which are more connected to ourselves – as human beings – are conceptual ones. The two monumental theories of physics of the 20th century – General Relativity and Quantum Mechanics - are incompatible and this inconsistency is not only on the mathematical level, but also on the conceptual. Usually scientists believe that the reconciliation between the relativist and quantum realms is possible. But is there a conceptual limit within ourselves as elements of the world?