B What is made up of all the rest quarks?

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The proton and neutron are composed of up and down quarks. What is made up of all the rest quarks?
The proton and neutron are composed of up and down quarks. What is made up of all the rest quarks?
 
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Should be added that due to the nature of weak interactions, all baryons and mesons containing heavy quarks are unstable and generally decay relatively fast. They are not present in large quantities anywhere.
 
Well, fast is relative. Since the weak interaction is really weak, some hadrons can be considered as quite stable if there's no strong interaction process leading to its decay. A famous example is the ##J/\psi##, which is pretty long-lived because it only decays through the electromagnetic and weak interaction. It has a very narrow width of 92.6 keV (compared to its mass of about 3.1 GeV):

https://pdglive.lbl.gov/Particle.action?init=0&node=M070&home=MXXX025#decayclump_G
 
Longest lived strange particle is long K0... with ct of 16 m. Longest lived strange baryon is Λ... with 7,8 cm. Whereas n has 260 million km.
 
Orodruin said:
decay relatively fast
vanhees71 said:
Well, fast is relative.
I don’t see a contradiction here. ;)
 
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Toponium is a hadron which is the bound state of a valance top quark and a valance antitop quark. Oversimplified presentations often state that top quarks don't form hadrons, because they decay to bottom quarks extremely rapidly after they are created, leaving no time to form a hadron. And, the vast majority of the time, this is true. But, the lifetime of a top quark is only an average lifetime. Sometimes it decays faster and sometimes it decays slower. In the highly improbable case that...
I'm following this paper by Kitaev on SL(2,R) representations and I'm having a problem in the normalization of the continuous eigenfunctions (eqs. (67)-(70)), which satisfy \langle f_s | f_{s'} \rangle = \int_{0}^{1} \frac{2}{(1-u)^2} f_s(u)^* f_{s'}(u) \, du. \tag{67} The singular contribution of the integral arises at the endpoint u=1 of the integral, and in the limit u \to 1, the function f_s(u) takes on the form f_s(u) \approx a_s (1-u)^{1/2 + i s} + a_s^* (1-u)^{1/2 - i s}. \tag{70}...

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