Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-02-12
J.Phys.G36:115008,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pp, v2: small changes, agrees with the published version
Scientific paper
10.1088/0954-3899/36/11/115008
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).
Barbieri Riccardo
Hall Lawrence J.
Rychkov Vyacheslav S.
Strumia Alessandro
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