Multi-muon events at the Tevatron: a hidden sector from hadronic collisions

TL;DR

This paper proposes a model involving a light scalar singlet that decays into multiple tau pairs to explain multi-muon events at the Tevatron, and links it to potential dark matter signals observed by PAMELA.

Contribution

It introduces a novel scalar singlet model explaining multi-muon events and connects it to dark matter annihilation signals, providing testable predictions.

Findings

Simulates muon properties consistent with observed data.

Suggests a testable decay chain involving four tau pairs.

Links the model to the PAMELA dark matter excess.

Abstract

Intrigued by some features of a small but significant fraction of the multi-muon events recently published by the CDF collaboration, we show an explicit attempt to describe them in terms of a light scalar singlet $\phi$ which communicates with the standard quarks either through a heavy scalar or a heavy fermion exchange. As suggested in arXiv:0810.7530, the singlet $\phi$ has a chain decay into a final state made of four $\tau\bar{\tau}$ pairs. We can simulate most of the muon properties of the selected sample of events. Some of these properties adhere rather well to the already published data; others should allow a decisive test of the proposed interpretation. Assuming that the test is positively passed, we show how the PAMELA excess can be fitted by the annihilation of a TeV Dark Matter particle that communicates with the Standard Model via the new light singlet(s).