The Elusive Gluon

Chala, Mikael; Juknevich, José; Perez, Gilad; Santiago, José

doi:10.1007/JHEP01(2015)092

The Elusive Gluon

Mikael Chala
(
- CAFPE, Granada and
- Granada U., Theor. Phys. Astrophys. and
- DESY
)
,
José Juknevich
(
- SISSA, Trieste and
- INFN, Trieste
)
,
Gilad Perez
(
- Weizmann Inst.
)
,
José Santiago
(
- CAFPE, Granada and
- Granada U., Theor. Phys. Astrophys. and
- CERN
)

Nov 6, 2014

31 pages

Published in:

JHEP 01 (2015) 092

Published: Jan 19, 2015

e-Print:

1411.1771 [hep-ph]

DOI:

10.1007/JHEP01(2015)092

Report number:

CAFPE-185-14,
CERN-PH-TH-2014-216,
DESY-14-213,
SISSA-60-2014-FISI,
UG-FT-315-14

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Abstract: (Springer)

We study the phenomenology of vector resonances in the context of natural composite Higgs models. A mild hierarchy between the fermionic partners and the vector resonances can be expected in these models based on the following arguments. Both direct and indirect (electroweak and flavor precision) constraints on fermionic partners are milder than the ones on spin one resonances. Also the naturalness pressure coming from the top partners is stronger than that induced by the gauge partners. This observation implies that the search strategy for vector resonances at the LHC needs to be modified. In particular, we point out the importance of heavy gluon decays (or other vector resonances) to top partner pairs that were overlooked in previous experimental searches at the LHC. These searches focused on simplified benchmark models in which the only new particle beyond the Standard Model was the heavy gluon. It turns out that, when kinematically allowed, such heavy-heavy decays make the heavy gluon elusive, and the bounds on its mass can be up to 2TeV milder than in the simpler models considered so far for the LHC14. We discuss the origin of this difference and prospects for dedicated searches.

Note:

32 pages, 12 figures. v2: References added, matches published version

Beyond Standard Model
Technicolor and Composite Models
Field Theories in Higher Dimensions
resonance: vector
gluon: decay
Higgs model: composite
spin: 1
CERN LHC Coll
electroweak interaction
new particle

References(61)

Figures(26)

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