quark rest mass equation
We can form a neutron from each of the quark families:
The quarks in a proton made of up and down quarks have a total rest
mass
(experimental) of 0.02 Gev.
The quarks in a proton made of charm and strange quarks would have a
mass
of about 4 Gev.This means that the quarks of a proton made from charm
and strange quarks are about 200 times (4/0.02) more massive than a
standard proton's quarks.And this is about the ratio of the mass of a
muon to an electron.
The quarks in a "proton" made of four top quarks and one bottom quark
(top,antitop,top,top,bottom)- a kind of pentaquark - would have a
total rest mass of,say,4x, where x is the mass of one top quark
(assuming bottom quark has a relatively small mass compared to
top).The ratio of a tau's mass to that of an electron is about
3200:1.Comparing the "proton" containing 3 antitop quarks and one top
quark to the standard proton of mass 0.02:
4x/0.02 = 3200
x = 16 Gev
using rest mass of a quark = n^2 x rest mass of down quark x 2^N
and N = 5 and rest mass of down quark = 0.01 Gev :
49 x 0.01 x 2^5 = 16
It seems that the rest mass of the top quark should be at least ten
times smaller than is experimentally observed (174 Gev).
This gives support to the idea that the top quark has a very large
mass because
the Pauli exclusion principle is being overcome.Otherwise its mass
would be 16 Gev as the lepton mass ratios suggest.
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