LHC signatures of a minimal supersymmetric hidden valley

Chan, Yuk Fung; Low, Matthew; Morrissey, David E.; Spray, Andrew

doi:10.1007/jhep05(2012)155

Cited by 43 publications

(47 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Loop corrections are not expected to change this at weak coupling. As a result, the h\ decays exclusively to the SM through mixing with the MSSM Higgs scalars (via a Higgs portal coupling induced by gauge kinetic mixing) or through a vector loop [84], This decay is typically faster than r -0.1 s for e > 2 x 10-4 and mh* > 2m ^ [85], Light hidden sectors of this variety are strongly con strained by fixed-target and precision experiments [86,87]. For dominant vector decays to the SM, the strongest limits for mx > 2mfl come from the recent BaBar dark photon search [88], and limit e < 5 x 10-4.…”

Section: B Decays To and From The Hidden Sectormentioning

confidence: 99%

See 1 more Smart Citation

Confronting the moduli-induced lightest-superpartner problem

et al. 2015

Self Cite

View full text Add to dashboard Cite

Moduli fields with Planck-suppressed couplings to light species are common in string compactifications. Decays of these moduli can reheat the Universe at a late time and produce dark matter nonthermally. For generic moduli fields motivated by string theory with masses similar to that of the gravitino and TeV-scale superpartners in the minimal supersymmetric Standard Model (MSSM), the nonthermal production of the lightest superpartner (LSP) tends to create an unacceptably large relic density or too strong of an indirect detection signal. We call this the moduli-induced LSP problem of the MSSM. In this paper we investigate extensions of the MSSM containing new LSP candidates that can alleviate this tension. We examine the viability of this scenario in models with light Abelian and non-Abelian hidden sectors and symmetric or asymmetric dark matter. In these extensions it is possible, though somewhat challenging, to avoid a moduliinduced LSP problem. In all but the asymmetric scenario, the LSP can account for only a small fraction of the observed dark matter density.

show abstract

Section: B Decays To and From The Hidden Sectormentioning

confidence: 99%

“…-» / £ + Sx, where / ) are the hidden neutralinos and Sx = hx l2,Ax,X^ are the hidden bosons, with total width [84] e^l N a l 2 …”

Section: B Decays To and From The Hidden Sectormentioning

confidence: 99%

Confronting the moduli-induced lightest-superpartner problem

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…I C 5). The K v meson decay can be prompt provided the ratio of the dark meson mass splitting to the dark photon mass, [52,149,363].…”

Section: A Theoretical Motivationmentioning

confidence: 99%

“…In this case, the Higgs decays directly to dark vectors, h → Z D Z D , followed by Z D → lepton jet on one side and Z D → invisible on the other. Here the invisible states are detector-stable hidden sector states, perhaps dark photinos [52,149,363,378]; the relative branching fractions to leptons, E T , and other SM partons are model dependent. Similar signatures can be obtained in the R-symmetric NMSSM if the light pseudoscalar is coupled to a hidden sector.…”

Section: A Theoretical Motivationmentioning

confidence: 99%

Exotic decays of the 125 GeV Higgs boson

et al. 2014

View full text Add to dashboard Cite

We perform an extensive survey of nonstandard Higgs decays that are consistent with the 125 GeV Higgs-like resonance. Our aim is to motivate a large set of new experimental analyses on the existing and forthcoming data from the Large Hadron Collider (LHC). The explicit search for exotic Higgs decays presents a largely untapped discovery opportunity for the LHC collaborations, as such decays may be easily missed by other searches. We emphasize that the Higgs is uniquely sensitive to the potential existence of new weakly coupled particles and provide a unified discussion of a large class of both simplified and complete models that give rise to characteristic patterns of exotic Higgs decays. We assess the status of exotic Higgs decays after LHC run I. In many cases we are able to set new nontrivial constraints by reinterpreting existing experimental analyses. We point out that improvements are possible with dedicated analyses and perform some preliminary collider studies. We prioritize the analyses according to their theoretical motivation and their experimental feasibility. This document is accompanied by a Web site that will be continuously updated with further information [http://exotichiggs.physics .sunysb.edu].

show abstract

“…Displaced vertices are well motivated scenarios of models beyond the Standard Model. They appear within the context of SUSY breaking [12][13][14], models of weak-scale R-parity violation [15][16][17], Hidden valleys [18][19][20][21], baryogengesis [22,23], dark QCD [24] and late decays of righthanded neutrinos within SUSY extensions of the Standard Model [25]. In addition, there is an increasing activity in the recasting front, to better constrain a wide range of these models using the existing LHC displaced vertex analyses [23,24,26].…”

Section: Motivationmentioning

confidence: 99%

Long-lived colored scalars at the LHC

Puente

Szynkman

2016

Eur. Phys. J. C

View full text Add to dashboard Cite

We study the collider signatures of a long-lived massive colored scalar transforming trivially under the weak interaction and decaying within the inner sections of a detector such as ATLAS or CMS. In our study, we assume that the colored scalar couples at tree-level to a top quark and a stable fermion, possibly arising from a dark sector or from supersymmetric extensions of the Standard Model. After implementing the latest experimental searches for long-lived colored scalars, we observe a region of parameter space consistent with a colored electroweak-singlet scalar with mass between ∼200-350 GeV and a lifetime between 0.1-1 mm/c together, with a nearly degenerate dark fermion that may be probed at the √ s = 13 TeV LHC. We show that a search strategy using a combination of cuts on missing transverse energy and impact parameters can exclude regions of parameter space not accessed by prompt searches. We show that a region of parameter space within our simplified model may naturally arise from the light-stop window regime of supersymmetric extensions of the Standard Model, where a light mostly right-handed stop has a mass slightly larger than the lightest neutralino and decays through a four-body process. MotivationSearching for long-lived massive particles is an active program at the LHC. The ATLAS and CMS collaborations have carried out an extensive list of analysis targeting different topologies for the decay products of long-lived particles within the inner detector as well as particles with large enough lifetimes to escape the detector. In particular, both collaborations have carried out an analysis sensitive to very long-lived charged particles using time-of-flight (TOF) and energy loss, dE/dx information [1,2]. This class of searches is highly model independent since a main requirement for a e-mail: apuente@physics.carleton.ca b e-mail: szynkman@fisica.unlp.edu.ar an event to pass the experimental cuts is the appearance of a muon-like object in the muon spectrometer matched to a track in the inner detector. These searches rule out very longlived gluinos, stops, sbottoms, and staus with masses below ∼1250, 900, 850, 500 GeV, respectively. Searches that target signatures in the inner detector have also been dealt with at the LHC. In particular, both CMS and ATLAS have conducted an analysis looking for disappearing tracks [3,4]. This search is particularly interesting since it targets supersymmetric (SUSY) models where a chargino is near mass-degenerate with the lightest neutralino, rendering the chargino with a long lifetime. Within this scenario, the chargino decays to a neutralino and a charged pion with very low p T , low enough for its track to pass reconstruction algorithms. The limits on the chargino mass are on masses below ∼270 GeV and proper lifetimes of ∼0.2 ns. Other searches look for interesting topologies that arise within SUSY scenarios with Rparity violation. In [5,6], the CMS and ATLAS collaborations search for long-lived neutral particles that decay to quarkantiquark pairs and a muon. ...

show abstract

LHC signatures of a minimal supersymmetric hidden valley

Cited by 43 publications

References 45 publications

Confronting the moduli-induced lightest-superpartner problem

Confronting the moduli-induced lightest-superpartner problem

Exotic decays of the 125 GeV Higgs boson

Long-lived colored scalars at the LHC

Contact Info

Product

Resources

About