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C-parameter Sudakov shoulder

The C-parameter shoulder produces large perturbative logarithms.

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Understanding the problem

Read the background

The C-parameter shoulder produces large perturbative logarithms. Earlier shoulder-resummation work on thrust and heavy jet mass does not supply the C-parameter-specific measurement functions calculated here.

Why it matters

A substantial factorization and perturbative calculation for a defined collider observable, beyond a known-answer classroom exercise.

What counts as progress

A sourced analytical result, substantive numerical advance, or useful calculation method with its physical model, approximation, baseline, and AI contribution stated.

What to watch for

  • Compare the same physical model, kinematic region, and approximation.
  • The source is a preprint. Accuracy is limited to the stated perturbative and logarithmic orders and kinematic region. Reported Monte Carlo agreement is an author check, not independent validation. AIProofWatch has not audited or reproduced the calculations.
  • Track independent checks and subsequent corrections separately from importance.

Background review: 2026-10-13. Selected sources:

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