What does this research mean for the field?

The 1/N_c corrections to the matrix element of Q_6 are large and positive, enhancing the CP ratio and bringing the standard model prediction of epsilon'/epsilon close to the measured value. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This research aims to analyze the behavior of epsilon'/epsilon within the framework of the 1/N_c expansion.

March 5, 2026Open Access

Analyzing epsilon'/epsilon in the 1/Nc Expansion

Key Points

This research aims to analyze the behavior of epsilon'/epsilon within the framework of the 1/N_c expansion.
Analyzed epsilon'/epsilon ratios through the 1/N_c expansion framework.
Calculated corrections to the matrix element of Q_6.
Compared findings with the central values of the standard model parameters.
Identified large and positive 1/N_c corrections to Q_6 matrix element.
Demonstrated a Delta I=1/2 enhancement similar to Q_1 and Q_2.
Showed that the CP ratio enhancement could align standard model predictions closer to measured values.

Abstract

We present a recent analysis of epsilon'/epsilon in the 1/Nc expansion. We show that the 1/Nc corrections to the matrix element of Q₆ are large and positive, indicating a Delta I=1/2 enhancement similar to the one of Q₁ and Q₂ which dominate the CP conserving amplitude. This enhances the CP ratio and can bring the standard model prediction close to the measured value for central values of the parameters.

Mark Helpful

Bookmark

Relay

View Full Paper