First evidence of the constrained minimal supersymmetric standard model is appearing soon

Konishi, Yasufumi; Ohta, Shingo; Sato, Joe; Shimomura, Takashi; Sugai, Kenichi; Yamanaka,; Masato,

doi:10.1103/physrevd.89.075006

Cited by 17 publications

(16 citation statements)

References 85 publications

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“…This has recently been explored in detail in Refs. [16,17] in the CMSSM framework, where there is a cosmologically-preferred stau-neutralino co-annihilation region of parameter space, but the resulting ranges of neutralino and stau masses hold more generally, since they are driven by the DM relic abundance. For stau-neutralino splittings less than about 1 GeV, the staus are long-lived at colliders, and the correct relic density can be obtained for gaugino masses M 1/2 ∼ 800-1400 GeV, where the exact value depends on tan β and the A-parameter that determines the left-right stau mixing.…”

Section: B Slepton-neutralino Co-annihilationmentioning

confidence: 99%

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Long-lived sleptons at the LHC and a 100 TeV proton collider

Feng

Iwamoto

Shadmi

et al. 2015

J. High Energ. Phys.

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We study the prospects for long-lived charged particle (LLCP) searches at current and future LHC runs and at a 100 TeV pp collider, using Drell-Yan slepton pair production as an example. Because momentum measurements become more challenging for very energetic particles, we carefully treat the expected momentum resolution. At the same time, a novel feature of 100 TeV collisions is the significant energy loss of energetic muons in the calorimeter. We use this to help discriminate between muons and LLCPs. We find that the 14 TeV LHC with an integrated luminosity of 3 ab −1 can probe LLCP slepton masses up to 1.2 TeV, and a 100 TeV pp collider with 3 ab −1 can probe LLCP slepton masses up to 4 TeV, using time-of-flight measurements. These searches will have striking implications for dark matter, with the LHC definitively testing the possibility of slepton-neutralino coannihilating WIMP dark matter, and with the LHC and future hadron colliders having a strong potential for discovering LLCPs in models with superWIMP dark matter.

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Section: B Slepton-neutralino Co-annihilationmentioning

confidence: 99%

“…We will find that, in agreement with Refs. [16,17], the entire cosmologically-motivated mass range can be probed by the 14 TeV LHC.…”

Section: Introductionmentioning

confidence: 99%

Long-lived sleptons at the LHC and a 100 TeV proton collider

Feng

Iwamoto

Shadmi

et al. 2015

J. High Energ. Phys.

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“…This slepton can effectively destruct 7 Be which would be 7 Li just after the BBN era. Since at the BBN era would-be Li problem [29,30,32,[53][54][55][56][57][58][59][60][61]. In addition, several articles [27,62,63] report that there are significant amount of 6 Li though the standard BBN cannnot predict 6 Li abundance.…”

Section: B Big-bang Nucleosynthesismentioning

confidence: 99%

Big-bang nucleosynthesis and leptogenesis in the CMSSM

et al. 2018

Self Cite

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We have studied the constrained minimal supersymmetric standard model with three right-handed neutrinos, and investigated whether there still is a parameter region consistent with all experimental data/ limits such as the baryon asymmetry of the Universe, the dark matter abundance and the lithium primordial abundance. Using Casas-Ibarra parametrization, we have found a very narrow parameter space of the complex orthogonal matrix elements where the lightest slepton can have a long lifetime, which is necessary for solving the lithium problem. We have studied three cases of the right-handed neutrino mass ratioWe have obtained the mass range of the lightest right-handed neutrino that lies between 10 9 and 10 11 GeV. The important result is that its upper limit is derived by solving the lithium problem and the lower limit comes from leptogenesis. Lepton flavor violating decays such as μ → eγ in our scenario are in the reach of MEG-II and Mu3e.

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“…If τ s are still present during BBN, they can form bound states with nuclei (such as 7 Li) and deplete the Lithium abundance, thus providing a viable solution to the Lithium problem. Since such solutions have been discussed at length in the literature [6,22,[33][34][35][36][37][38][39][40][41][42][43], here we concentrate on their features relevant for the LHC searches.…”

Section: Application To the Lithium-7 Problemmentioning

confidence: 99%

“…In this work we focus on the case of a neutralino LSP and consider the CMSSM, closely following the discussion presented in Ref. [22]. In order to cover the CMSSM parameter space we perform a Monte Carlo scan in the input parameters:…”

Section: Application To the Lithium-7 Problemmentioning

confidence: 99%

Simplified models for exotic BSM searches

Heisig¹,

Lessa²,

Quertenmont³

2015

J. High Energ. Phys.

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Simplified models are a successful way of interpreting current LHC searches for models beyond the standard model (BSM). So far simplified models have focused on topologies featuring a missing transverse energy (MET) signature. However, in some BSM theories other, more exotic, signatures occur. If a charged particle becomes longlived on collider time scales -as it is the case in parts of the SUSY parameter spaceit leads to a very distinct signature. We present an extension of the computer package SModelS which includes simplified models for heavy stable charged particles (HSCP). As a physical application we investigate the CMSSM stau co-annihilation strip containing long-lived staus, which presents a potential solution to the Lithium problem. Applying both MET and HSCP constraints we show that, for low values of tan β, all this region of parameter space either violates Dark Matter constraints or is excluded by LHC searches.

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First evidence of the constrained minimal supersymmetric standard model is appearing soon

Cited by 17 publications

References 85 publications

Long-lived sleptons at the LHC and a 100 TeV proton collider

Long-lived sleptons at the LHC and a 100 TeV proton collider

Big-bang nucleosynthesis and leptogenesis in the CMSSM

Simplified models for exotic BSM searches

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