Abstract

A search for new heavy particles manifested as resonances in two-jet final states is presented. The data were produced in 7 TeV proton-proton collisions by the LHC and correspond to an integrated luminosity of 315 nb⁻¹ collected by the ATLAS detector. No resonances were observed. Upper limits were set on the product of cross section and signal acceptance for excited-quark (q*) production as a function of q* mass. These exclude at the 95% C.L. the q* mass interval 0.30<m(q*)<1.26 TeV, extending the reach of previous experiments.

Highlights

  • A search for new heavy particles manifested as resonances in two-jet final states is presented

  • The data were produced in 7 TeV proton-proton collisions by the LHC and correspond to an integrated luminosity of 315 nbÀ1 collected by the ATLAS detector

  • Such new states may include an excited composite quark qÃ, exemplifying quark substructure [1,2,3], an axigluon predicted by chiral color models [4,5], a flavor-universal color-octet coloron [6,7], or a color-octet techni- meson predicted by models of extended technicolor and top-color-assisted technicolor

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Summary

Introduction

A search for new heavy particles manifested as resonances in two-jet final states is presented. Upper limits were set on the product of cross section and signal acceptance for excited-quark (qÃ) production as a function of qà mass.

Results
Conclusion
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