Light stau phenomenology and the Higgs γγ rate

By M. Carena, Stefania Gori, N. Shah, C. Wagner, Lian-tao Wang. 2012

200 citations recorded by the source corpus.

A bstractRecently, an excess of events consistent with a Higgs boson with mass of about 125 GeV was reported by the CMS and ATLAS experiments. This Higgs boson mass is consistent with the values that may be obtained in minimal supersymmetric extensions of the Standard Model (SM), with both stop masses less than a TeV and large mixing. The apparently enhanced photon production rate associated with this potential Higgs signal may be the result of light staus with large mixing. Large stau mixing and large coupling of the staus to the SM-like Higgs boson may be obtained for large values of tan β and moderate to large values of the Higgsino mass parameter, μ. We study the phenomenological properties of this scenario, including precision electroweak data, the muon anomalous magnetic moment, Dark Matter, and the evolution of the soft supersymmetry-breaking parameters to high energies. We also analyze the possible collider signatures of light third generation sleptons and demonstrate that it is possible to find evidence of their production at the 8 TeV and the 14 TeV LHC. The most promising channel is stau and tau sneutrino associated production, with the sneutrino decaying into a W boson plus a light stau.

Subfields: Artificial Intelligence, Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/10e3997c06e3a46b80fb0c2825eabd45d090547f

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In Artificial Intelligence

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5. Ansgar Denner
6. Stefan Dittmaier
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In Astronomy and Astrophysics

1. Atlas Collaboration
2. Stefan Dittmaier
3. Ansgar Denner
4. N. Kauer
5. G. Passarino
6. M. Schönherr
7. M. Zaro
8. Stefano Frixione

In Nuclear and High Energy Physics

1. Atlas Collaboration
2. Cms Collaboration
3. Gudrun Heinrich
4. Stefan Dittmaier
5. Ansgar Denner
6. M. Grazzini
7. M. Schönherr
8. Fabio Maltoni

Citations in the corpus

• Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC (2014, background): “For instance, charged supersymmetric particles such as light staus [34, 42, 154–157] and charginos [158, 159] could give potentially substantial contributions.”
• Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, background): “– The light stau scenario: It has been shown that light staus, in the presence of large mixing, may lead to important modifications of the di-photon decay width of the lightest CP-even Higgs boson, Γ(h → γγ) [321, 334, 338,365,661,662,678,679].”