A pure-glue hidden valley I. States and decays

Juknevich, José; Melnikov, Dmitry; Strassler, Matthew J.

doi:10.1088/1126-6708/2009/07/055

Cited by 109 publications

(193 citation statements)

References 48 publications

Supporting

Mentioning

182

Contrasting

Order By: Relevance

“…In the Folded SUSY and Quirky Little Higgs models, the mirror sector contains its own copy of a confining QCD-like force. Since LEP limits forbid mirror matter with masses below ∼ 100 GeV, the lightest states of the mirror QCD sector are mirror glueballs [51][52][53], which couple to the SM-like Higgs through a top partner loop. This interaction both allows the SM Higgs to decay to mirror glueballs with an appreciable branching ratio, and allows the produced glueballs to decay back in the SM with macroscopic lifetimes ∼ µm to km [54].…”

Section: Electroweak Top Partnersmentioning

confidence: 99%

Towards a no-lose theorem for naturalness

Curtin

Saraswat

2016

Phys. Rev. D

View full text Add to dashboard Cite

We derive a phenomenological no-lose theorem for naturalness up to the TeV scale, which applies when quantum corrections to the Higgs mass from top quarks are canceled by perturbative BSM particles (top partners) of similar multiplicity due to to some symmetry. Null results from LHC searches already seem to disfavor such partners if they are colored. Any partners with SM charges and ∼ TeV masses will be exhaustively probed by the LHC and a future 100 TeV collider. Therefore, we focus on neutral top partners. While these arise in Twin Higgs theories, we analyze neutral top partners as model-independently as possible using EFT and Simplified Model methods. We classify all perturbative neutral top partner structures in order to compute their irreducible lowenergy signatures at proposed future lepton and hadron colliders, as well as the irreducible tunings suffered in each scenario. Central to our theorem is the assumption that SM-charged BSM states appear in the UV completion of neutral naturalness, which is the case in all known examples. Direct production at the 100 TeV collider then allows this scale to be probed at the ∼10 TeV level. We find that proposed future colliders probe any such scenario of naturalness with tuning of 10% or better. This provides very strong model-independent motivation for both new lepton and hadron colliders, which in tandem act as discovery machines for general naturalness. We put our results in context by discussing other possibilities for naturalness, including "swarms" of top partners, inherently non-perturbative or exotic physics, or theories without SM-charged states in the UV completion. Realizing a concrete scenario which avoids our arguments while still lacking experimental signatures remains an open model-building challenge.

show abstract

Section: Electroweak Top Partnersmentioning

confidence: 99%

Towards a no-lose theorem for naturalness

Curtin

Saraswat

2016

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…These glueballs decay through higher dimensional operators into SM matter. Depending on the scales, however, their lifetime may be very long [21,27], potentially leading to cosmological problems depending on the quirk masses and the confinement scale. In QDM, there are additional operators due to interactions with the Higgs.…”

Section: Field Contentmentioning

confidence: 99%

“…For theories with vector-like quirks, Refs. [21,27] showed that the glueballs decay slowly, since the leading operators are suppressed by many powers of the quirk mass. One such operator is…”

Section: Quirkcolor Glueball Decaymentioning

confidence: 99%

Quirky composite dark matter

et al. 2010

View full text Add to dashboard Cite

We propose a new dark matter candidate, "quirky dark matter," that is a scalar baryonic bound state of a new non-Abelian force that becomes strong below the electroweak scale. The bound state is made of chiral quirks: new fermions that transform under both the new strong force as well as in a chiral representation of the electroweak group, acquiring mass from the Higgs mechanism. Electric charge neutrality of the lightest baryon requires approximately degenerate quirk masses which also causes the charge radius of the bound state to be negligible. The abundance is determined by an asymmetry that is linked to the baryon and lepton numbers of the universe through electroweak sphalerons. Dark matter elastic scattering with nuclei proceeds through Higgs exchange as well as an electromagnetic polarizability operator which is just now being tested in direct detection experiments. A novel method to search for quirky dark matter is to look for a gamma-ray "dark line" spectroscopic feature in galaxy clusters that result from the quirky Lyman-alpha or quirky hyperfine transitions. Colliders are expected to dominantly produce quirky mesons, not quirky baryons, consequently large missing energy is not the primary collider signal of the physics associated with quirky dark matter.

show abstract

“…In other words, it gives an example of a "hidden valley" [55]. (In some ways such a scenario could resemble the physics of quirks [56] and of the pure-glue hidden valley [57], although the glue here is five-dimensional and involves additional modes associated with the S 4 . )…”

Section: Scales In D4-brane Theoriesmentioning

confidence: 99%

Randall-Sundrum and strings

Reece

Wang

2010

J. High Energ. Phys.

View full text Add to dashboard Cite

We investigate stringy excitations in Randall-Sundrum effective theories for electroweak symmetry breaking arising from embedding in string theory. RS is dual to a confining gauge theory, which we expect to have "QCD strings," or color flux tubes. Stringy constructions of RS-like theories allow us to investigate the mass of these string states, which typically grows with a small fractional power of the number of colors N of the dual gauge theory. There are two known strong constraints on N for RS-like theories. The first arises from demanding that the Standard Model gauge couplings do not have a Landau pole at low scales. The second arises from demanding that the first-order confining phase transition in the early universe is able to proceed without leaving an empty universe, i.e. that the rate of bubble nucleation is not too small. We find that these constraints on N imply that string states are generically at most a factor of a few heavier than the lightest KK states, and we cannot selfconsistently remain in the limit N, λ 1. We examine various string constructions of AdS or RS-like backgrounds, including orbifolds, theories on M5-branes, theories on D4-branes, and the recent F-theory construction of Polchinski and Silverstein. In every case we find that there are strong bounds on the mass of new stringy states. We briefly discuss important phenomenological implications due to the presence of such light stringy excitations, such as precision electroweak and flavor observables, as well as collider signals.

show abstract

A pure-glue hidden valley I. States and decays

Cited by 109 publications

References 48 publications

Towards a no-lose theorem for naturalness

Towards a no-lose theorem for naturalness

Quirky composite dark matter

Randall-Sundrum and strings

Contact Info

Product

Resources

About