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Andrew Spray
순수물리이론 연구단
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Long-lived, colour-triplet scalars from unnaturalness

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Title
Long-lived, colour-triplet scalars from unnaturalness
Author(s)
Barnard J.; Cox P.; Gherghetta T.; Andrew Spray
Publication Date
2016-03
Journal
Journal of High Energy Physics, v.2016, no.3, pp.3 -
Abstract
Abstract: Long-lived, colour-triplet scalars are a generic prediction of unnatural, or split, composite Higgs models where the spontaneous global-symmetry breaking scale f ≳ 10 TeV and an unbroken SU(5) symmetry is preserved. Since the triplet scalars are pseudo NambuGoldstone bosons they are split from the much heavier composite-sector resonances and are the lightest exotic, coloured states. This makes them ideal to search for at colliders. Due to discrete symmetries the triplet scalar decays via a dimension-six term and given the large suppression scale f is often metastable. We show that existing searches for collider-stable R-hadrons from Run-I at the LHC forbid a triplet scalar mass below 845 GeV, whereas with 300 fb−1 at 13 TeV triplet scalar masses up to 1.4 TeV can be discovered. For shorter lifetimes displaced-vertex searches provide a discovery reach of up to 1.8 TeV. In addition we present exclusion and discovery reaches of future hadron colliders as well as indirect limits that arise from modifications of the Higgs couplings. © 2016, The Author(s)
URI
http://pr.ibs.re.kr/handle/8788114/2438
DOI
10.1007/JHEP03(2016)003
ISSN
1029-8479
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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