A search for resonance signals from new physics models was performed using the ATLAS dijet invariant mass spectrum at a center-of-mass energy of 8 TeV. The full dataset from the 2012 data-taking period was used, corresponding to an integrated luminosity of 20.3 fb<sup>−1</sup>. The analysis covered a mass range from 250 GeV to 4.5 TeV and found no evidence of an excess anywhere in the spectrum. Upper mass limits were set at 95% CL on both model- specific benchmark new physics signals and on two different generic resonance forms: a Gaussian shape and a Breit-Wigner shape which accounted for pdf and detector effects. The analysis excluded excited quarks below 4.06, heavy <i>W'</i> bosons below 2.45, colour-octet scalars below 2.70, leptophobic chiral excited bosons <i>W<sup>*</sup></i> below 1.75, and quantum black holes below 5.66 and 5.62 for the Qbh and BlackMax generators respectively.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:686922 |
| Date | January 2015 |
| Creators | Pachal, Katherine E. |
| Contributors | Tseng, Jeff |
| Publisher | University of Oxford |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://ora.ox.ac.uk/objects/uuid:93a1f359-d602-4480-8f59-ccee0332af3e |
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