Decaying light particles in the SHiP experiment. III. Signal rate estimates for scalar and pseudoscalar sgoldstinos

TL;DR

This paper estimates the expected signal rates of scalar and pseudoscalar sgoldstinos in the SHiP experiment and derives new constraints on model parameters based on CHARM experiment data.

Contribution

It provides the first detailed signal rate estimates for sgoldstinos at SHiP and updates parameter limits using existing CHARM results.

Findings

Estimated sgoldstino signal rates at SHiP for various model parameters.

Derived new experimental limits on sgoldstino properties from CHARM data.

Highlighted the potential of SHiP to detect light sgoldstinos.

Abstract

For supersymmetric extensions of the Standard Model with light sgoldstinos - scalar and pseudoscalar superparthners of goldstino - we estimate the signal rate anticipated at the lately proposed fixed target experiment SHiP utilizing CERN SPS beam of 400 GeV protons. We also place new limits on the model parameters from the similar analysis of the published results of CHARM experiment.