How light can the lightest neutralino be?

Olaf Kittel

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How light can the lightest neutralino be?

Olaf Kittel

High Energy Physics - Phenomenology · Submitted 15 Nov 2010

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We show that without the GUT relation between the gaugino mass parameters M_1 and M_2, the mass of the lightest neutralino is essentially unconstrained by collider bounds and precision observables.

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What the abstract itself states, as probabilities: claims first 0.03 · states limitation 0.26 · human participants 0.02 · controlled comparison 0.06 · randomized assignment 0.01 · states quantitative result 0.09 · compares with prior results 0.51 · mentions code or data availability 0.02.

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In this talk we summarize previous work on mass bounds of a light neutralino in the Minimal Supersymmetric Standard Model. We show that without the GUT relation between the gaugino mass parameters M_1 and M_2, the mass of the lightest neutralino is essentially unconstrained by collider bounds and precision observables. We conclude by considering also the astrophysics and cosmology of a light neutralino.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	In this talk we summarize previous work on mass bounds of a light neutralino in the Minimal Supersymmetric Standard Model.	background 0.77	0.18	0.03	unclear 0.56
s1	We show that without the GUT relation between the gaugino mass parameters M_1 and M_2, the mass of the lightest neutralino is essentially unconstrained by collider bounds and precision observables.	result 1.00	0.82	0.89	asserted 1.00
s2	We conclude by considering also the astrophysics and cosmology of a light neutralino.	contribution 0.73	0.50	0.05	unclear 0.87

What kind of paper the classifier reports this is: review 0.73 · evidence from literature 0.80.

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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper

Original abstract

In this talk we summarize previous work on mass bounds of a light neutralino in the Minimal Supersymmetric Standard Model. We show that without the GUT relation between the gaugino mass parameters M_1 and M_2, the mass of the lightest neutralino is essentially unconstrained by collider bounds and precision observables. We conclude by considering also the astrophysics and cosmology of a light neutralino.

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What this paper does with the arXiv papers it cites

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers whose main result relates to this one's

Found among the papers closest to this one by title and main claim. Pith's classifier compared each pair's main results and a second model family confirmed the relation; checked against two further families, shown conflicts agreed 118 times in 120 and shown same results 218 times in 239. The quoted sentence is the other paper's main claim.

States the same result 1 paper

We show that in the Minimal Supersymmetric Standard Model, the mass of the lightest neutralino is experimentally unconstrained if the GUT relation between the gaugino mass parameters M_1 and M_2 is dropped.

How light can the lightest neutralino be? · 1.00

What it cites · 17 sentences without a confident label

Uses data or values from 2 papers

In order to compare with the results of the LEP searches we make use of the model-independent upper bounds on the topological neutralino production cross section obtained by OPAL with $√(s)= 208$ GeV [ref] , [equation] Taking into account $BR(Z→qq̅)≈70%$, one can roughly read off from the OPAL[We analyze this bound assuming conservatively that $BR(χ̃_2^0 →Zχ̃_1^0) = 1$.

Search for Chargino and Neutralino Production at sqrt(s) = 192-209 GeV at LEP · Collider bounds · 0.89
The bino relic energy density, $ρ_$, divided by the critical energy density of the universe, $ρ_c$, is given by [ref] [equation] In order for the bino hot dark matter not to disturb the large structure formation, we assume its contribution to be less than the upper bound on the energy density of the neutrinos, as determined by the WMAP data [ref] [equation] From Eqs. ([ref]) and ([ref]), we find the conservative upper bound [equation] Thus a very light bino with mass below about $1$ eV is consistent with structure formation.

Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data · Bounds from astrophysics and cosmology · 0.91

Cites as support 3 papers

However, if one drops the GUT relation, $M_1$ is an independent parameter, allowing to tune the neutralino mass determined from the lowest-order mass matrix $ℳ_0$ freely [ref] .

Mass Bounds on a Very Light Neutralino · Neutralino framework · 0.98
However, if one drops the GUT relation, $M_1$ is an independent parameter, allowing to tune the neutralino mass determined from the lowest-order mass matrix $ℳ_0$ freely [ref] .

Attempts at Explaining the NuTeV Observation of Di-Muon Events · Neutralino framework · 0.98
However, if one drops the GUT relation, $M_1$ is an independent parameter, allowing to tune the neutralino mass determined from the lowest-order mass matrix $ℳ_0$ freely [ref] .

Supersymmetric Dark Matter - How Light Can the LSP Be? · Neutralino framework · 0.98

Cites as background 12 papers

Here we ask the question `How light can the lightest neutralino be?', and discuss bounds from collider physics and precision observables, to summarize previous works [ref] .

Discovery potential of radiative neutralino production at the ILC · Introduction · 0.95
Here we ask the question `How light can the lightest neutralino be?', and discuss bounds from collider physics and precision observables, to summarize previous works [ref] .

The Role of Beam polarization for Radiative Neutralino Production at the ILC · Introduction · 0.95
Here we ask the question `How light can the lightest neutralino be?', and discuss bounds from collider physics and precision observables, to summarize previous works [ref] .

Comments on a Massless Neutralino · Introduction · 0.95

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