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2014

Of Contact Interactions and Colliders

Davidson, Sacha, Descotes-Genon, Sebastien, Verdier, Patrice

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The hierarchy of scales which would allow dimension-six contact interactions to parametrise New Physics may not be verified at colliders.

Instead, we explore the feasability and usefulness of parametrising the high-energy tail of distributions at the LHC using form factors.
We focus on the process pp -> l+l- in the presence of t (or s)-channel New Physics, guess a form factor from the partonic cross-section, and attempt to use data to constrain its coefficients, and the coefficients to constrain models.
We find that our choice of form factor decribes t-channel exchange better than a contact interaction, and the coefficients in a particular model can be obtained from the partonic cross-section.

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