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2

About half of the proton's momentum is carried by the valence quarks (uud) and the rest is spread around many gluons and many sea-quarks ($q\bar{q}$ pairs). In the Drell-Yan process, it is assumed that the colliding quark is a valence quark and the anti-quark must be a sea quark. We are colliding a highly energetic quark with a low energy anti-quark. This ...

67

7 TeV is not that much kinetic energy, that has been covered by your question and previous answers. However, in the context of a proton, with a rest mass of $1.672×10^{−27}~\mathrm {kg}$ (very, very little mass), when a single proton has 7 TeV then it is travelling at a specific speed: $$E= mc^2$$ \begin{align}E& = E_0 + \text{KE}\\ \text{KE}&=E- ...

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7 or 77 TeV at how much current? If it's a very low current, such as just one electron, the energy is rather low by everyday standards, but still very highly concentrated, enough the convert some of the energy into matching matter and antimatter particles.

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So, considering that 7 TeV is more or less the same kinetic energy of a mosquito, why is considered to be a great amount of energy in LHC? Like other people said, it's not a great amount of energy. However, it's concentrated in a very tiny space. Just think of how much a mosquito is bigger than a subatomic particle.

70

The energy of a bullet is around 735 joules (see bullet details here). This is about the same energy that I have when I'm running at about 4.6 m/s. Would you rather be hit by me or the bullet? The bullet kills you because it concentrates all the energy onto a small impact area while my impact area is rather larger (and sadly getting even larger as ...

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