A search for new physics in dijet mass and angular distributions in pp collisions at $$\sqrt{s}$$=7 TeV measured with the ATLAS detector
A search for new interactions and resonances produced in LHC proton-proton (pp) collisions at a centre-of-mass energy $$\sqrt{s}$$= 7 TeV has been performed with the ATLAS detector. Using a data set with an integrated luminosity of 36 pb-1 dijet mass and angular distributions have been measured up to dijet masses of ~3.5 TeV and found to be in good agreement with Standard Model predictions. This analysis sets limits at 95% C.L. on various models for new physics: an excited quark is excluded with mass between 0.60 and 2.64 TeV, an axigluon hypothesis is excluded for axigluon masses between 0.60 and 2.10 TeV and Randall-Meade quantum black holes are excluded in models with six extra space-time dimensions for quantum gravity scales between 0.75 and 3.67 TeV. Production cross section limits as a function of dijet mass are set using a simplified Gaussian signal model to facilitate comparisons with other hypotheses. In conclusion, analysis of the dijet angular distribution using a novel technique 18 simultaneously employing the dijet mass excludes quark contact interactions with a compositeness scale $${\Lambda}$$ below 9.5 TeV.
- Research Organization:
- SLAC National Accelerator Lab. (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
- Contributing Organization:
- ATLAS Collaboration
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1502988
- Report Number(s):
- SLAC-PUB-17065
- Journal Information:
- New Journal of Physics, Journal Name: New Journal of Physics Journal Issue: 5 Vol. 13; ISSN 1367-2630
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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