Search for New Massive Long-Lived Neutral Particles

Gustafson, H. R.; Ayre, C. A.; Jones, L. W.; Longo, Michael J.; Murthy, P. V. Ramana

doi:10.1103/physrevlett.37.474

Cited by 49 publications

(18 citation statements)

References 8 publications

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“…Before to go on, we discuss a quite old (and obviously not well-known, so we discuss it with some details) fixed-target search for massive, strongly interacting, neutral particles [40]. The experiment was led in 1976 at FNAL with a beam of neutral particles produced by protons at 300 GeV impinging on a Be target.…”

Section: Jhep11(2015)108mentioning

confidence: 99%

Simplified SIMPs and the LHC

Daci

Bruyn

Lowette

et al. 2015

J. High Energ. Phys.

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The existence of Dark Matter (DM) in the form of Strongly Interacting Massive Particles (SIMPs) may be motivated by astrophysical observations that challenge the classical Cold DM scenario. Other observations greatly constrain, but do not completely exclude, the SIMP alternative. The signature of SIMPs at the LHC may consist of neutral, hadron-like, trackless jets produced in pairs. We show that the absence of charged content can provide a very efficient tool to suppress dijet backgrounds at the LHC, thus enhancing the sensitivity to a potential SIMP signal. We illustrate this using a simplified SIMP model and present a detailed feasibility study based on simulations, including a dedicated detector response parametrization. We evaluate the expected sensitivity to various signal scenarios and tentatively consider the exclusion limits on the SIMP elastic cross section with nucleons.

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Section: Jhep11(2015)108mentioning

confidence: 99%

Simplified SIMPs and the LHC

Daci

Bruyn

Lowette

et al. 2015

J. High Energ. Phys.

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“…In this mass range the H would decay almost exclusively to Λn, Σ 0 n, and Σ − p [3]. Several previous experiments have searched for H's but with no compelling success [4]. The search described here is sensitive to H's having mass and lifetime in a previously unexplored range.…”

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confidence: 94%

Search for the Weak Decay of anHDibaryon

Belz¹,

Cousins²,

Diwan³

et al. 1996

Phys. Rev. Lett.

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“…Measuring a neutral particle's velocity by time of flight and its kinetic energy in a calorimeter determines its mass via KE m͑1͞ p 1 2 b 2 2 1͒. Using this technique at FNAL, Gustafson et al [12] put limits on the production of stable neutral particles, but was limited to masses above 2 GeV because of neutron background. At Brookhaven AGS energy the production cross section is lower, but pair production of S 0 's probably dominates associated production of S 0 -R 0 and production of R 0 pairs, because this increases the phase space.…”

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confidence: 99%

Detecting Light-Gluino-Containing Hadrons

1996

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When supersymmetry breaking produces only dimension-2 operators, gluino and photino masses are of order 1 GeV or less. The gg bound state has mass 1.3-2.2 GeV and lifetime *10 25 10 210 s. This range of mass and lifetime is largely unconstrained because missing energy and beam dump techniques are ineffective. With only small modifications, upcoming K 0 decay experiments can study most of the interesting range. The lightest gluino-containing baryon ͑udsg͒ is long lived or stable; experiments to find it and the uudg are also discussed. [S0031-9007(96)00088-9] PACS numbers: 12.60.Jv, 14.80.Ly Some supersymmetry (SUSY) breaking scenarios produce negligible tree-level gaugino masses and scalar trilinear couplings; consequently they have no "SUSY CP problem" [1]. Although massless at tree level, gauginos get calculable masses through radiative corrections from electroweak (gaugino, Higgsino-Higgs, and gauge boson) and top-stop loops. Evaluating these within the constrained parameter space leads to a gluino mass range mg ϳ

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Search for New Massive Long-Lived Neutral Particles

Cited by 49 publications

References 8 publications

Simplified SIMPs and the LHC

Simplified SIMPs and the LHC

Search for the Weak Decay of anHDibaryon

Detecting Light-Gluino-Containing Hadrons

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