The Xicc++ particle will become a tool to observe the strong force in another light.
By Shelby Traynor
Collage by Alex Hanson using an image representing the new particle observed by LHCb, containing two charm quarks and one up quark. (Image credit: Daniel Dominguez/CERN)
Almost two-hundred metres beneath the France-Switzerland border, physicists at CERN’s Large Hadron Collider have observed a new particle. A charming particle. They’ve been on the look-out for him for some time, and now they’ve got him— Xicc++.
The name doesn’t exactly roll off the tongue, but this guy is more than meets the eye. He’s heavy. He’s charming. He’s a subatomic particle, and he’s a real catch. CERN’s particle smasher— based near Geneva, Switzerland— spotted the fellow during the Large Hadron Collider beauty experiment, or the LHCb experiment for short.
Xicc++ is the elusive brother of the proton, neutron, and of a number of other composite subatomic particles. These particles are all a part of the same family, because they’re all made up of three quarks. What are quarks, you ask? Well, let’s dive in. Continue reading “A Particle Full of Charm”
We know more about what dark matter isn’t than what dark matter is.
By Shelby Traynor
Collage by Alex Hanson, using an image of the Coma Cluster
A mile underground, in a converted mine somewhere in South Dakota, scientists have been trying to detect an elusive substance that makes up around 27 per cent of all the mass and energy in the observable universe: dark matter.
For twenty months, from October 2014 to May 2016, the Large Underground Xenon (LUX) experiment was trying to detect dark matter. But at last week’s International Dark Matter Conference (a name I call immediate dibs on in case I start a girl band), Professor of Physics at Brown University Rick Gaitskell said: “What we have observed is consistent with background alone.”
The LUX experiment had failed. Dark matter remains as mysterious as Jess Mariano in season two of Gilmore Girls. Continue reading “Dark Matter: The Jess Mariano of the Universe”