38 votes

Does gravitation really exist at the particle level?

For the interaction of one small (atom scale) mass and one large mass, measurements of the Earth's atmosphere that anyone could do with a homemade barometer and a nearby mountain constitute direct ...
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  • 8,528
24 votes

Does gravitation really exist at the particle level?

Here is an easy way to grasp how difficult it would be to make the direct measurement you propose. Take two protons and place them one centimeter apart. They will exert a certain tiny amount of ...
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10 votes

Does gravitation really exist at the particle level?

FWIW, small particles react to the big ones:Experiments have been done with neutrons in a gravity field. The phase of their wavefunction was shifted, as was shown by interference. If the neutron didn'...
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  • 1,643
2 votes

How (if) are the Higgs scalar and the $W/Z$ vectors related (apart from interaction)?

To the best of anybody's knowledge, the mass of the Higgs, $O(\sqrt{\lambda}v)$, and the masses of the gauge bosons, $O(gv)$, generated by the Higgs mechanism, are absolutely unrelated in the SM. ...
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2 votes

Are the particles in the zero-energy Higgs field real or virtual?

Do not confuse the concept of a field in the quantum field theory of particle physics, the standard model, with the particles that creation and annihilation operators create and annihilate on those ...
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1 vote
Accepted

Why measuring the octant of the atmospheric oscillation parameter of neutrinos is important?

In this work, we discuss how this study can be further analysed to resolve entanglement of the quadrant of leptonic CPV phase and Octant of atmospheric mixing angle θ23, at LBNEs. The study is done ...
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1 vote

How do we know that the gluon travels at $c$?

Gluons are massless in the Standard Model, and all massless particles travel at $c$. This is pretty much by definition, but a hand-wavy way to explain it is that a massless particle will be ...
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  • 5,818
1 vote

What are the symmetries of standard model and its conservation laws?

First you have the continuous symmetry groups: the Poincaré group, which is all the isometries of space-time some gauge groups, depending on which interaction you're talking about: U(1) for QED, SU(3)...
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