Determination of shear forces inside the proton
Determination of shear forces inside the proton
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发表时间:
2021-04
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通讯作者:
V. Burkert;L. Elouadrhiri;F. Girod
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作者:
V. Burkert;L. Elouadrhiri;F. Girod
We report on the first determination of the shear forces on quarks inside the proton from experimental data on deeply virtual Compton scattering. The maximum shear force of 40±20 MeV fm−1 occurs near 0.6 fm from the proton center, indicating where confinement forces may be strongest. On the macroscopic scale of the earth surface, this force corresponds to the weight of a mass of ≈ 650 kg. The shear forces in the proton reverse direction at r ≈ 0.45 fm from the center.