N = 1 supergravity, the weak scale and the low-energy particle spectrum

Ibáñez, Luis E.; López, C.

doi:10.1016/0550-3213(84)90581-9

Cited by 343 publications

(173 citation statements)

References 27 publications

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“…In this case exact solutions to the RGEs in a closed form can be found following [55] and [56]. The results for the gaugino focus point are given in figure 1.…”

Section: The Gaugino Focus Point -Analytic Discussionmentioning

confidence: 94%

Non-universal gaugino masses and fine tuning implications for SUSY searches in the MSSM and the GNMSSM

Kaminska

Ross

Schmidt-Hoberg

2013

J. High Energ. Phys.

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For the case of the MSSM and the most general form of the NMSSM (GN-MSSM) we determine the reduction in the fine tuning that follows from allowing gaugino masses to be non-degenerate at the unification scale, taking account of the LHC8 bounds on SUSY masses, the Higgs mass bound, gauge coupling unification and the requirement of an acceptable dark matter density. We show that low-fine tuned points fall in the region of gaugino mass ratios predicted by specific unified and string models. For the case of the MSSM the minimum fine tuning is still large, approximately 1:60 allowing for a 3 GeV uncertainty in the Higgs mass (1:500 for the central value), but for the GNMSSM it is below 1:20. We find that the spectrum of SUSY states corresponding to the low-fine tuned points in the GNMSSM is often compressed, weakening the LHC bounds on coloured states. The prospect for testing the remaining low-fine-tuned regions at LHC14 is discussed.

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“…In this case exact solutions to the RGEs in a closed form can be found following [55] and [56]. The results for the gaugino focus point are given in figure 1.…”

Section: The Gaugino Focus Point -Analytic Discussionmentioning

confidence: 94%

Non-universal gaugino masses and fine tuning implications for SUSY searches in the MSSM and the GNMSSM

Kaminska

Ross

Schmidt-Hoberg

2013

J. High Energ. Phys.

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“…Since all the physics in which we are interested depends on just two parameters, M and m (or equivalently M S and x), we must focus on the CCB and UFB constraints involving these quantities. This means, in particular, that the CCB constraints involving the trilinear scalar couplings other 5 Even including the one-loop radiative corrections ∆V 1 to the tree-level potential V 0 , and using eq. (11) accordingly modified, is not in general a precise procedure since V 0 + ∆V 1 at Q = m Z still yields inaccurate results if M 2 S ≫ m 2 Z , as it is normally the case [25] (see the comments at the end of the appendix).…”

Section: The Ifp Scenario Revisitedmentioning

confidence: 99%

“…The classic example of the scenario just described is the quasi-infrared fixed point (IFP) prediction for the top-quark Yukawa coupling [4,5,6,7,8,9,10,11,12,13,14,15] 1 . As 1 The quasi-infrared fixed point differs from the infrared fixed point of Pendleton and Ross (PR) [16].…”

Section: Introductionmentioning

confidence: 99%

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The Higgs mass in the MSSM infrared fixed point scenario

Casas¹,

Espinosa²,

Haber³

1998

Nuclear Physics B

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In the infrared fixed point (IFP) scenario of the minimal supersymmetric model (MSSM), the top-quark mass and other physical quantities of the low-energy theory are insensitive to the values of the parameters of the theory at some high energy scale. In this framework we evaluate the light CP-even Higgs mass, m h 0 , taking into account some important effects that had not been previously considered. In particular, the supersymmetric correction to the relation between the running and the physical top-quark masses lowers the value of tan β, thereby implying a lower predicted value of m h 0 . Assuming a supersymmetric threshold of M S ≤ 1 TeV and M t = 175 GeV, we find an upper bound of m h 0 ≤ 97 ± 2 GeV; the most plausible value of m h 0 lies somewhat below the upper bound. This places the Higgs boson in the IFP scenario well within the reach of the LEP-2 Higgs search.

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“…where Q is the renormalization scale and F = Q low Q high E ln Q. R µ and E are definite functions that depend just on the top Yukawa coupling and the gauge couplings, respectively, [13,14].…”

Section: Set Upmentioning

confidence: 99%

Histogram comparison tools for the search of new physics at LHC. Application to the CMSSM

Cabrera

Casas

Mitsou

et al. 2012

J. High Energ. Phys.

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Abstract:We propose a rigorous and effective way to compare experimental and theoretical histograms, incorporating the different sources of statistical and systematic uncertainties. This is a useful tool to extract as much information as possible from the comparison between experimental data with theoretical simulations, optimizing the chances of identifying New Physics at the LHC. We illustrate this by showing how a search in the CMSSM parameter space, using Bayesian techniques, can effectively find the correct values of the CMSSM parameters by comparing histograms of events with multijets + missing transverse momentum displayed in the effective-mass variable. The procedure is in fact very efficient to identify the true supersymmetric model, in the case supersymmetry is really there and accessible to the LHC.

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N = 1 supergravity, the weak scale and the low-energy particle spectrum

Cited by 343 publications

References 27 publications

Non-universal gaugino masses and fine tuning implications for SUSY searches in the MSSM and the GNMSSM

Non-universal gaugino masses and fine tuning implications for SUSY searches in the MSSM and the GNMSSM

The Higgs mass in the MSSM infrared fixed point scenario

Histogram comparison tools for the search of new physics at LHC. Application to the CMSSM

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