Signals from non-strongly interacting supersymmetric particles at LEP energies

Chen, M; Dionisi, C.; Martı́nez, M.; Tata, Xerxes

doi:10.1016/0370-1573(88)90166-4

Cited by 100 publications

(84 citation statements)

References 148 publications

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“…Within the MSSM, radiative neutralino production [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] e + + e − →χ 0…”

Section: Signal Processmentioning

confidence: 99%

“…As a unique process to search for the first SUSY signatures at e + e − colliders, the radiative production of neutralinos has been intensively studied in the literature [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. 1 Early investigations focus on LEP energies and discuss special neutralino mixing scenarios only, in particular the pure photino case [19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…1 Early investigations focus on LEP energies and discuss special neutralino mixing scenarios only, in particular the pure photino case [19][20][21][22][23][24][25][26]. More recent studies assume general neutralino mixing [27][28][29][30][31][32][33][34][35] and some of them underline the importance of longitudinal [27][28][29][30] and even transverse beam polarisations [27,30].…”

Section: Introductionmentioning

confidence: 99%

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Discovery potential of radiative neutralino production at the ILC

Dreiner¹,

Kittel²,

Langenfeld³

2006

Phys. Rev. D

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We study radiative neutralino production e + e − →χ 0 1χ 0 1 γ at the linear collider with longitudinally polarised beams. We consider the Standard Model background from radiative neutrino production e + e − → ννγ, and the supersymmetric radiative production of sneutrinos e + e − →νν * γ, which can be a background for invisible sneutrino decays. We give the complete tree-level formulas for the amplitudes and matrix elements squared. In the Minimal Supersymmetric Standard Model, we study the dependence of the cross sections on the beam polarisations, on the parameters of the neutralino sector, and on the selectron masses. We show that for bino-like neutralinos longitudinal polarised beams enhance the signal and simultaneously reduce the background, such that statistics is significantly enhanced. We point out that there are parameter regions where radiative neutralino production is the only channel to study SUSY particles, since heavier neutralinos, charginos and sleptons are too heavy to be pair-produced in the first stage of the linear collider with √ s = 500 GeV.

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“…Within the MSSM, radiative neutralino production [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] e + + e − →χ 0…”

Section: Signal Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Discovery potential of radiative neutralino production at the ILC

Dreiner¹,

Kittel²,

Langenfeld³

2006

Phys. Rev. D

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“…Reflections of super symmetric lagrangian in the Standard Model (SM) [4,5,6,7] phenomenology, including relations among the gauge coupling constants from supersymmetric 8,9,10 grand unification and the presence of a heavy top quark and light Higgs scalar; 2. The prediction of new particles with the correct spin and quantum numbers assignments to be super partners of the standard model particles; and 3.…”

Section: Introductionmentioning

confidence: 99%

Production of a Charged Higgs Boson with Chargino and Neutralino

Ibrahim

2018

Arab Journal of Nuclear Sciences and Applications

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The reaction − + + ( ) → − + � + + � in MSSM model is studied. The production total cross section is evaluated in specifics by numerical integration over the kinematically allowed range. Three values for the parameter (5, 15, 35) have been used to study the production process with a proposal mass parameter M (150, 300 GeV). It was found that the dominant production can reach about 10 −4 pb in the allowed range of parameters. The maximum cross section achieved reaches the value 1.6853 × 10 −5 pb for = 5 and = 300 GeV at a center of mass energy, = 880 GeV for the diagram no. 2 which proceeds through the photon propagator, γ. A maximum of 1.0836 × 10 -4 pb was obtained for = 15 and = 300 GeV at a center of mass energy, = 860 GeV for the diagram no. 28 which proceeds through the exchange of the scalar neutrino propagator, � . For = 35 and = 300 GeV at a center of mass energy, = 900 GeV, the cross section obtained, reached the value 1.8623×10 −4 pb.

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“…The model used in this paper is a constrained Minimal Supersymmetric Model (CMSSM) [8][9][10][11]. It has only five free parameters not counting the additional 45 Yukawa couplings λ, λ , and λ .…”

Section: Introductionmentioning

confidence: 99%

Searches for R-parity violating decays of Gauginos at 183 GeV at LEP

Abbiendi

1999

Eur. Phys. J. C

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Abstract. Searches for pair-produced charginos and neutralinos with R-parity violating decays have been performed using a data sample corresponding to an integrated luminosity of 56 pb −1 collected with the OPAL detector at LEP at a centre-of-mass energy of √ s = 183 GeV. An important consequence of Rparity violation is that the lightest supersymmetric particle becomes unstable. The searches have been performed under the assumptions that the lightest supersymmetric particle promptly decays and that only one R-parity violating coupling is dominant for each of the decay modes considered. Such processes would yield multiple leptons, jets plus leptons, or multiple jets with or without significant missing energy in the final state. No excess of such events above Standard Model backgrounds has been observed. Limits are presented on the production cross-sections of gauginos in R-parity violating scenarios. Limits are also presented in the framework of the Minimal Supersymmetric Standard Model.

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Signals from non-strongly interacting supersymmetric particles at LEP energies

Cited by 100 publications

References 148 publications

Discovery potential of radiative neutralino production at the ILC

Discovery potential of radiative neutralino production at the ILC

Production of a Charged Higgs Boson with Chargino and Neutralino

Searches for R-parity violating decays of Gauginos at 183 GeV at LEP

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