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A comment on Large Hadron Collider discovers three new exotic particles. Parent comment

Re:Large Hadron Collider discovers three new exotic particles by ars on Tuesday July 05, 2022 @06:08PM (#31994360)
Deep inelastic scattering of the nucleus did not find quarks. It only found nucleons.

The same thing here: it's not known if quarks have an internal structure. And unless your energy is higher than the size of the object being measured you certainly can't tell if it's point like.

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Re:Large Hadron Collider discovers three new exotic particles by davrosthedalek on Tuesday July 05, 2022 @07:18PM (#31994938)
No, that's quasi-elastic scattering. DIS was done, for example, by HERA, an elctron-proton collider. SLAC did it in 1968 and essentially discovered the quarks.

Of course there is always a measurement limit. Current limits for the size are "smaller than 1e-19m". That's why I wrote "as far as we know", as we have no evidence that they are not point-like, and we have rather strong limits.

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