Of symmetries, the strong force and Helen Quinn

[ I am reviving the Bowler Hat Science blog as a quick way to link all my new publications. Subscribe to the feed to keep up with all my stories! ]

Of symmetries, the strong force and Helen Quinn

From Symmetry:

Modern theoretical physicists spend much of their time examining the symmetries governing particles and their interactions. Researchers describe these principles mathematically and test them with sophisticated experiments, leading to profound insights about how the universe works.

For example, understanding symmetries in nature allowed physicists to predict the flow of electricity through materials and the shape of protons. Spotting imperfect symmetries led to the discovery of the Higgs boson.

One researcher who has used an understanding of symmetry in nature to make great strides in theoretical physics is Helen Quinn. Over the course of her career, she has helped shape the modern Standard Model of particles and interactions— and outlined some of its limitations. With various collaborators, she has worked to establish the deep mathematical connection between the fundamental forces of nature, pondered solutions to the mysterious asymmetry between matter and antimatter in the cosmos and helped describe properties of the particle known as the charm quark before it was discovered experimentally. [Read more at Symmetry…]


The dark horse of the dark matter hunt

[ I am reviving the Bowler Hat Science blog as a quick way to link all my new publications. Subscribe to the feed to keep up with all my stories! ]

The dark horse of the dark matter hunt

From Symmetry Magazine:

The ADMX experiment seems to be an exercise in contradictions.

Dark matter, the substance making up 85 percent of all the mass in the universe, is invisible. The goal of ADMX is to detect it by turning it into photons, particles of light. Dark matter was forged in the early universe, under conditions of extreme heat. ADMX, on the other hand, operates in extreme cold. Dark matter comprises most of the mass of a galaxy. To find it, ADMX will use sophisticated devices microscopic in size.

Scientists on ADMX—short for the Axion Dark Matter eXperiment—are searching for hypothetical particles called axions. The axion is a dark matter candidate that is also a bit of a dark horse, even as this esoteric branch of physics goes. [Read more in Symmetry Magazine]

“A” is for axion

I just started a new series: the Alphabet of Cosmology! Go check out the first entry: A is for Axion.

Galileo's Pendulum

Wot’s all this, now?

Today I begin a new feature, which I will try to update once a week: the Alphabet of Cosmology. In these entries, I’ll highlight a  concept, experiment, or observation in cosmology—the study of the history, contents, and evolution of the Universe—that may not be as familiar to non-specialists.

(I stole borrowed this idea from Brian Switek, whose Dinosaur Alphabet series is a great way to learn about dinosaur species that aren’t the usual famous ones covered in books or on TV shows.)

The dark matter problem in boxer brief

About 80% of the mass in the Universe isn’t the same stuff familiar from daily life. The name we give our ignorance is dark matter, and we generally assume it to be a particle of some kind. We see its effects in the motion of stars and gas in galaxies, in the way galaxies cluster…

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