Characterising WIMPs at a future e
                     +
                     e
                     − linear collider

Bartels, Christoph; Berggren, M.; List, Jenny

doi:10.1140/epjc/s10052-012-2213-9

Cited by 47 publications

(73 citation statements)

References 11 publications

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“…Projects that are currently in progress deal with the radiative production of neutralinos at the ILC [33], the measurement of SUSY CP phases at the LHC [34], the determination of chargino and neutralino properties at the ILC [35] as well as a complete cartography of the edge structures and spin measurements within the decay chains at the LHC [36]. Further projects deal with the implementation of extended GUT-or string-inspired supersymmetric models within WHIZARD to study their phenomenology [38].…”

Section: Supersymmetrymentioning

confidence: 99%

WHIZARD—simulating multi-particle processes at LHC and ILC

2011

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Abstract. We describe the universal Monte-Carlo (parton-level) event generator WHIZARD d , version 2. The program automatically computes complete tree-level matrix elements, integrates them over phase space, evaluates distributions of observables, and generates unweighted partonic event samples. These are showered and hadronized by calling external codes, either automatically from within the program or via standard interfaces. There is no conceptual limit on the process complexity; using current hardware, the program has successfully been applied to hard scattering processes with up to eight particles in the final state. Matrix elements are computed as helicity amplitudes, so spin and color correlations are retained. For event generation, processes can be concatenated with full spin correlation, so factorized approximations to cascade decays are possible when complete matrix elements are not desired. The Standard Model, the MSSM, and many alternative models such as Little Higgs, anomalous couplings, or effects of extra dimensions or noncommutative SM extensions have been implemented. Using standard interfaces to parton shower and hadronization programs, WHIZARD covers physics at hadron, lepton, and photon colliders.

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Section: Supersymmetrymentioning

confidence: 99%

WHIZARD—simulating multi-particle processes at LHC and ILC

2011

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“…In the context of collider searches, EFTs have been widely used to study the monojet [50][51][52][53][54][55][56] and mono-photon [57][58][59][60][61][62][63] final states. Of course, at LHC energies the contact operator approximation may break down if the particle mediating dark sector-SM interactions has a mass around or below the typical partonic center of mass energies of the LHC [54,[64][65][66][67][68][69].…”

Section: Jhep12(2015)120mentioning

confidence: 99%

The coannihilation codex

Baker

Brod

Hedri

et al. 2015

J. High Energ. Phys.

121

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We present a general classification of simplified models that lead to dark matter (DM) coannihilation processes of the form DM + X → SM 1 + SM 2 , where X is a coannihilation partner for the DM particle and SM 1 , SM 2 are Standard Model fields. Our classification also encompasses regular DM pair annihilation scenarios if DM and X are identical. Each coannhilation scenario motivates the introduction of a mediating particle M that can either belong to the Standard Model or be a new field, whereby the resulting interactions between the dark sector and the Standard Model are realized as tree-level and dimension-four couplings. We construct a basis of coannihilation models, classified by the SU(3) C × SU(2) L × U(1) Y quantum numbers of DM, X and M. Our main assumptions are that dark matter is an electrically neutral color singlet and that all new particles are either scalars, Dirac or Majorana fermions, or vectors. We illustrate how new scenarios arising from electroweak symmetry breaking effects can be connected to our electroweak symmetric simplified models. We offer a comprehensive discussion of the phenomenological features of our models, encompassing the physics of thermal freeze-out, direct and indirect detection constraints, and in particular searches at the Large Hadron Collider (LHC). Many novel signatures that are not covered in current LHC searches are emphasized, and new and improved LHC analyses tackling these signatures are proposed. We discuss how the coannihilation simplified models can be used to connect results from all classes of experiments in a straightforward and transparent way. This point is illustrated with a detailed discussion of the phenomenology of a particular simplified model featuring leptoquark-mediated dark matter coannihilation.

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“…Studies on DM signatures at hadron colliders have been performed by many authors [1-3, 8-23, 28-38]. On the other hand, future high energy e + e − colliders, such as ILC, CEPC, and TLEP, can also be good places to probe DM signatures [7,[24][25][26][27][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Dark matter searches in the mono-Zchannel at high energye+e−colliders

Bi²,

Yan³

et al. 2014

Phys. Rev. D

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We explore the mono-Z signature for dark matter searches at future high energy e + e − colliders. In the context of effective field theory, we consider two kinds of contact operators describing dark matter interactions with electroweak gauge bosons and with electron/positron, respectively. For five benchmark models, we propose kinematic cuts to distinguish signals from backgrounds for both charged leptonic and hadronic decay modes of the Z boson. We also present the experimental sensitivity to cutoff scales of effective operators and compare it with that of the Fermi-LAT indirect search and demonstrate the gains in significance for the several configurations of polarized beams.PACS numbers: 95.35.+d,13.66.Hk

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Characterising WIMPs at a future e + e − linear collider

Cited by 47 publications

References 11 publications

WHIZARD—simulating multi-particle processes at LHC and ILC

WHIZARD—simulating multi-particle processes at LHC and ILC

The coannihilation codex

Dark matter searches in the mono-Zchannel at high energye+e−colliders

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