What is subatomic decay?

Categories: Physics in a Nutshell
Published on: July 30, 2017


The word “decay,” in the world of physics, has a slightly different meaning than what you might think.

What is subatomic decay?

by Don Lincoln.

Quarks and gluons and partons, oh my …

Categories: Physics in a Nutshell
Tags: , ,
Published on: April 11, 2017
The proton consists of a complex mixture of quarks and gluons. Physicists use the word parton to describe all constituents of a proton.

Quarks and gluons are more generically called “partons.”

http://news.fnal.gov/2012/05/quarks-and-gluons-and-partons-oh-my/, by Don Lincoln.

Poles and masses

Categories: CDF, Energy Frontier
Published on: June 8, 2016

Measuring the “Pole Mass” of the top quark at the Tevatron (CDF)

http://news.fnal.gov/2016/06/poles-and-masses/, by Leo Bellantoni.

Busy bees

Categories: CMS/LHC
Published on: May 15, 2016

Looking for exceptionally heavy particles decay into two Higgs bosons, which would preferentially decay into four B quarks.

http://news.fnal.gov/2016/03/busy-bees/, by Don Lincoln.

Looking for signs: dijet resonances

Categories: CMS/LHC
Published on: March 25, 2016

Any sign of new particles at the much higher energy of LHC Run 2?

http://news.fnal.gov/2016/02/looking-for-signs-dijet-resonances/, by Bo Jayatilaka

DZero discovers a new particle consistent with a tetraquark

Categories: Cosmic Frontier, DZero
Published on: March 1, 2016

A new observation of the 4-quark bound state.

http://news.fnal.gov/2016/02/dzero-discovers-a-new-particle-consistent-with-a-tetraquark/, by Dmitri Denisov and Paul Grannis: the co-spokespersons for the DZero experiment.

Two for the price of one

Categories: DZero, Energy Frontier
Published on: November 12, 2015

It is possible to create both a J/ψ (“Jay Sigh”) and an Υ (“OOPS-i-lon”) simultaneously. What we learn from these events has a lot to do with the way quarks are stuck together inside the proton.

http://www.fnal.gov/pub/today/archive/archive_2015/today15-11-12.html, by Leo Bellantoni.

Why three?

Categories: CMS/LHC
Published on: October 15, 2015
Quark generations

Is there a fourth generation of quarks? CMS says, “Not yet.”

http://www.fnal.gov/pub/today/archive/archive_2015/today15-10-09.html, by Don Lincoln.

The strong/weak force

Categories: CMS/LHC, Energy Frontier
Published on: August 13, 2015

Are there other forces? CMS sets new limits.

http://www.fnal.gov/pub/today/archive/archive_2015/today15-06-19.html, by Jim Pivarski

Rule of three

Categories: CMS/LHC, Cosmic Frontier
Published on: April 10, 2015

CMS seems to see a decay mode of the Higgs boson that indicates the Higgs can mix leptons of different flavors.

http://www.fnal.gov/pub/today/archive/archive_2015/today15-03-27.html, by Jim Pivarski.

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