| Topic: |
Science > Physics |
| User: |
"Tito" |
| Date: |
28 Mar 2006 04:59:20 PM |
| Object: |
mass deficit |
The up quark is 1.5 to 4.0 MeV, and the down quark is 4.0 to 8.0 MeV. Two
ups and a down add up to about 12 MeV . That leaves about 926 MeV if
subtracted from the proton's 938 MeV. Is this mass deficit due entirely to
binding energy (gluons are supposed to be massless) or do the believe more
quarks than just three occupy a proton? How does this energy compare with
the vacuum energy? At what temp would 926 MeV be achieved and how does that
compare with the spontaneous condensation of matter in the early universe?
Any thoughts?
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| User: "Gravityman" |
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| Title: Re: mass deficit |
28 Mar 2006 05:29:59 PM |
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Tito wrote:
The up quark is 1.5 to 4.0 MeV, and the down quark is 4.0 to 8.0 MeV. Two
ups and a down add up to about 12 MeV . That leaves about 926 MeV if
subtracted from the proton's 938 MeV. Is this mass deficit due entirely to
binding energy (gluons are supposed to be massless) or do the believe more
Maybe most of the mass of the nucleon comes from the kinetic energy
of the gluons and quarks??
quarks than just three occupy a proton? How does this energy compare with
the vacuum energy? At what temp would 926 MeV be achieved and how does that
compare with the spontaneous condensation of matter in the early universe?
Any thoughts?
I'm fuzzy about the source of vacuum energy.. could it be the
dreaded aether again. What do you mean at what temp would
926 MeV be achieved...
Grav
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| User: "Tito" |
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| Title: Re: mass deficit |
28 Mar 2006 08:17:51 PM |
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At Temp=10^12 Kelvin energy was down to 1 MeV at about t^-5 sec. which is
when the standard model says it was cool enough for strong forces to exist
and quarks and anti quarks formed into triads. I was hoping to get help with
how this energy adds up in the proton. The energy of the degrees of freedom
of the three quarks including kinetic energy and rotational energy would
oppose binding energy. I asked about the vacuum energy as a reference
point. I wondered if protons are thought to have more than three quarks in
the standard model. Its hard to come up with that much binding energy unless
its just like everything else we know comprising only 4.4 %.
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