Proton and Neutron Cousins: Sigma-sub-b

JHU-led Team Discovers Exotic Relatives of Protons and Neutrons. ‘A team of scientists, including four at The Johns Hopkins University, has discovered two new subatomic particles, rare but important relatives of the familiar, commonplace proton and neutron. Named “Sigma-sub-b” particles, the two exotic and incredibly quick to decompose particles are like rare jewels mined from mountains of data, said team leader Petar Maksimovic, assistant professor of physics and astronomy in the university’s Krieger School of Arts and Sciences. “These particles are members of what we call the ‘baryonic’ family, so-called for the Greek word ‘barys,’ which means heavy,” Maksimovic said. “Baryons are particles that contain three quarks, which are the fundamental building blocks of matter.”
The simplest baryons are the proton and neutron, which make up the nuclei of atoms of ordinary matter.’ [via ScienceNow]

Fermilab Today: CDF finds exotic relatives of protons and neutrons

Experimenters at Fermilab discover exotic relatives of protons and neutrons: photos and graphics

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