English

A Meta-analysis of the 8 TeV ATLAS and CMS SUSY Searches

High Energy Physics - Phenomenology 2016-09-06 v2 High Energy Physics - Experiment

Abstract

Between the ATLAS and CMS collaborations at the LHC, hundreds of individual event selections have been measured in the data to look for evidence of supersymmetry at a center of mass energy of 8 TeV. While there is currently no significant evidence for any particular model of supersymmetry, the large number of searches should have produced some large statistical fluctuations. By analyzing the distribution of p-values from the various searches, we determine that the number of excesses is consistent with the Standard Model only hypothesis. However, we do find a shortage of signal regions with far fewer observed events than expected in both the ATLAS and CMS datasets (at 1.65σ1.65\sigma and 2.77σ2.77\sigma, respectively). While not as compelling as a surplus of excesses, the lack of deficits could be a hint of new physics already in the 8 TeV datasets.

Keywords

Cite

@article{arxiv.1410.2270,
  title  = {A Meta-analysis of the 8 TeV ATLAS and CMS SUSY Searches},
  author = {Benjamin Nachman and Tom Rudelius},
  journal= {arXiv preprint arXiv:1410.2270},
  year   = {2016}
}

Comments

Zero observed count regions excluded in v1, fixed in v2. Results are qualitatively unchanged