Massive color-octet bosons and pairs of resonances at hadron colliders
Abstract
We analyze collider signatures of massive color-octet bosons whose couplings to quarks are suppressed. Gauge invariance forces the octets to couple at tree level only in pairs to gluons, with a strength set by the QCD gauge coupling. For a spin-1 octet, the cross section for pair production at hadron colliders is larger than that for a quark of equal mass. The octet decays into two jets, leading to a 4-jet signature with two pairs of jets forming resonances of the same mass. For a spin-0 octet the cross section is smaller, and the dominant decay is into bbbar, or ttbar if kinematically allowed. We estimate that discovery of spin-1 octets is possible for masses up to 330 GeV at the Tevatron, and 1 TeV at the LHC with 1 fb -1, while the reach is somewhat lower for spin-0 octets.
- Publication:
-
Physics Letters B
- Pub Date:
- December 2008
- DOI:
- 10.1016/j.physletb.2008.10.048
- arXiv:
- arXiv:0709.2378
- Bibcode:
- 2008PhLB..670..119D
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 5 pages, 3 ps figures. v2: minor changes, figures 3 and 4 replaced and references added