How does a proton have a mass-energy of ~1GeV when its constituent quarks have orders of magnitude less?

Question

I'm doing a short particle physics course, and I just can't make this add up... I'm told that a proton is about 1GeV, and up & down quarks are ~0.005GeV, so I don't understand where the extra mass-energy in a proton comes from.

Answer 1

In order to hold something together, a force must be attractive. An attractive potential has negative energy, so the binding energy does not increase the mass, it decreases it.

Up and down quarks have a calculated bare mass of ~5MeV. This is the mass, *at rest*, of an isolated quark (calculated because a quark cannot exist in isolation). The remaining mass comes from the fact that quarks are *not* at rest inside a proton - the 3 quarks that make up the proton, (and the virtual sea of quark-antiquark pairs that exist in the colour field there), are moving at relativistic speeds. And as we all know from special relativity, an object moving at speeds comparable to the speed of light increases in mass as m = m0/sqrt(1-v^2/c^2).

Answer 2

Mass is defined in words of inertia - the favor for a rigidity to make something change its route or % of action. Mass and ability are below some situations interconvertible, as expressed in the equation E = mc^2 yet fairly some situations could be satisfied for this to ensue tremendous scale. as an party, you won't be able to turn an electron into organic ability, yet an electron and the positron will react to generate ability interior this kind of a pair of gamma rays (project difficulty for readers: why do you want 2 gamma rays, no longer in simple terms one?). The connection with Higgs replaced into spot-on. it really is all very a lot physics. no individual fairly is regularly occurring with of, yet we've not given up and could no longer provide up of sorting out so a lot more advantageous. BTW, a neutron weighs fairly more advantageous than a proton, and larger or less 2000 circumstances as a lot as an electron. you are able to calculate the flexibility launched in a nuclear reaction with assistance from subtracting the mass of the products from the mass of the verify, and utilizing Einstein's formulation. The mass of a proton includes the mass of the quarks, of the gluons protecting the quarks at the same time, and the flexibility in touch.

Answer 3

because there are 3 quarks in the proton 2 have the same charge and 1 has different.
There is a muclear force which is binding the quarks together.
I think....lol
good luck and Peace.

Answer 4

imagine a busy city centre at rush hour. a drunk physics professor stumbles out of a bar at 12 noon and bangs into 10 random people as they rush to the deli for a bacon sandwhich for lunch. the drunk professor will loose energy but gain momentum from the people he bangs into. they will loose 1/10 energy equal to his mass.

Answer 5

Strong nuclear force binding energy

Protons can also be accelerated, adding kinetic energy to their rest energy.

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Answer 6

binding energy in the strong nuclear force between them