A Hadron is a kind of particle, made of quarks. There are two kinds of hadrons, baryons (made out of three quarks) and mesons (made out of a quark and a quirky quark known as an antiquark).
The particle of interest is made up of an up quark, a strange quark, and a heavy bottom quark. I've known a few bluegrass bands that fit that description, but this particle is called the Xi-sub-b baryon.
The observation was made at the Collider Detector at Fermilab (CDF) .
The neutral Xi-sub-b belongs to the family of bottom baryons, which are about six times heavier than the proton and neutron because they all contain a heavy bottom quark. The particles are produced only in high-energy collisions, and are rare and very difficult to observe*.
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Fermi lab has observed a single top quark. If you know anything about quarks, especially top quarks, you will know that this is extraordinary. Top quarks, generated using the Strong Nuclear Force have been observed in the past, but a single top quark is generated with the Weak Nuclear Force.
From Gordon via Chad Fermilab is claiming single top quark decay to b quark + W
Since I found myself talking about particle physics yesterday, and since I find myself in the middle of a seasonal allergy flare-up that's sapping my bloggy motivation, I thought I would dust off and re-post some old ar
Actually, the awards will include other sorts of blogging, too, but it's the awards for science blogging that have a fast-approaching nomination deadline.
So... mass?
Heavy.
@1: The link gives a mass of 5.7878 GeV/c2. That's a bit more than six times the mass of the proton.
Unfortunately, no news on Higgs this year. Particle physics *appears* to be in a foundational crisis, but I freely admit that it is outside my area of expertise.
--bks
For perspective, assuming the mass @3 is correct, that's not much heavier than the b-quark itself (~4.7 GeV) and much lighter than the top quark (~173 GeV). The Higgs is thought to be in the range greater than but close to 114 GeV, although there are some ways to get around this. Supersymmetric partners are theoretically in the 100-1000s GeV range. The proton however (~1 GeV as mentioned above) is made of up and down quarks which are < 0.01 GeV.