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Abstract: The H1 and ZEUS collaborations at HERA have searched for signatures ofphysics beyond the Standard Model using high Q^2 neutral current deep inelasticelectron-proton and positron-proton scattering events.
No significantdeviations from Standard Model predictions were observed.
Various eeqq contactinteraction models have been considered.
Limits on the compositeness scale ingeneral eeqq contact interaction models, mass to the Yukawa coupling ratio forheavy leptoquarks, the effective Planck mass scale in models with large extradimensions and the effective quark charge radius are presented.



Author: Amita Raval

Source: https://arxiv.org/



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