Which way did it go? A view from the top

This table summarizes the forward-backward asymmetry measurements in top quark-antiquark events at the Tevatron.

Over the last decade, measurements by the CDF and DZero collaborations of how top quarks flee the scene of the crime, the so-called “forward-backward asymmetry,” caused quite a stir as they clashed with then state-of-the-art theoretical predictions for the Tevatron. The disagreement tantalized physicists with visions of new, unexpected particles influencing the behavior of the top quark. Now, with the final, combined word from the experiments, Fermilab has placed a capstone on its study of the forward-backward asymmetry, and the measurements and theory now agree.

By Ziqing Hong and Jon Wilson

The article can be found here: http://news.fnal.gov/2017/12/which-way-did-it-go-a-view-from-the-top/

And so, ad infinitum: Smallest of the small

People are made of molecules. Molecules are made of atoms. Atoms are made of protons, neutrons and electrons, Protons and neutrons are made of quarks and gluons. Is that the end?

http://news.fnal.gov/2012/03/and-so-ad-infinitum-smallest-of-the-small/, by Don Lincoln

The most you can know

“Squeezing Water from a Rock” by Rebecca Gilbert

How much can you know from a limited data set? A look back of our estimates on the Top Quark mass when we had small amounts of data.

http://news.fnal.gov/2016/10/the-most-you-can-know/, by Leo Bellantoni

The CMS trigger: taming the firehose

A basic understanding of how CMS goes from 40 million potential events per second to something that can actually be recorded.

http://news.fnal.gov/2016/10/cms-trigger-taming-firehose/, by Bo Jayatilaka.

Matter and antimatter

No, really. It matters. Image: Harley Schwadron

No, really. It matters. Image: Harley Schwadron

DZero measured the difference in the rates of the decays B → μ ν D0 vs. B+ → μ+ ν D0.

http://news.fnal.gov/2016/09/matter-and-antimatter/, by Leo Bellantoni