Limits...
Collider Interplay for Supersymmetry, Higgs and Dark Matter.

Buchmueller O, Citron M, Ellis J, Guha S, Marrouche J, Olive KA, de Vries K, Zheng J - Eur Phys J C Part Fields (2015)

Bottom Line: If supersymmetry is not discovered at the LHC, it is likely to lie somewhere along a focus-point, stop-coannihilation strip or direct-channel A / H resonance funnel.We discuss the prospects for discovering supersymmetry along these strips at a future circular proton-proton collider such as FCC-hh.Illustrative benchmark points on these strips indicate that also in this case FCC-ee could provide tests of the CMSSM at the loop level.

View Article: PubMed Central - PubMed

Affiliation: High Energy Physics Group, Blackett Lab., Imperial College, Prince Consort Road, London, SW7 2AZ UK.

ABSTRACT

We discuss the potential impacts on the CMSSM of future LHC runs and possible [Formula: see text] and higher-energy proton-proton colliders, considering searches for supersymmetry via  [Formula: see text] events, precision electroweak physics, Higgs measurements and dark matter searches. We validate and present estimates of the physics reach for exclusion or discovery of supersymmetry via [Formula: see text] searches at the LHC, which should cover the low-mass regions of the CMSSM parameter space favoured in a recent global analysis. As we illustrate with a low-mass benchmark point, a discovery would make possible accurate LHC measurements of sparticle masses using the MT2 variable, which could be combined with cross-section and other measurements to constrain the gluino, squark and stop masses and hence the soft supersymmetry-breaking parameters [Formula: see text] and [Formula: see text] of the CMSSM. Slepton measurements at CLIC would enable [Formula: see text] and [Formula: see text] to be determined with high precision. If supersymmetry is indeed discovered in the low-mass region, precision electroweak and Higgs measurements with a future circular [Formula: see text] collider (FCC-ee, also known as TLEP) combined with LHC measurements would provide tests of the CMSSM at the loop level. If supersymmetry is not discovered at the LHC, it is likely to lie somewhere along a focus-point, stop-coannihilation strip or direct-channel A / H resonance funnel. We discuss the prospects for discovering supersymmetry along these strips at a future circular proton-proton collider such as FCC-hh. Illustrative benchmark points on these strips indicate that also in this case FCC-ee could provide tests of the CMSSM at the loop level.

No MeSH data available.


Related in: MedlinePlus

Upper panels the  planes for  and  (left panel) and 40 (right panel), displaying focus-point strips. Lower panels the  planes for  and  (left panel), and  (right panel). In each panel, the ochre regions are excluded because of a charged LSP and/or a tachyon, and the green regions are excluded by  decay. There is no consistent electroweak vacuum in the purple regions in the upper panels. In the dark blue strips the relic LSP density lies within the range allowed by cosmology, and the dashed red lines are contours of  as calculated using FeynHiggs 2.10.0. The solid black, blue, green and purple lines in each panel are particle exclusion reaches for  searches with LHC at 8 TeV, 300 and 3000/fb with LHC at 14 TeV, and 3000/fb with HE-LHC at 33 TeV, respectively
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Fig23: Upper panels the planes for and (left panel) and 40 (right panel), displaying focus-point strips. Lower panels the planes for and (left panel), and (right panel). In each panel, the ochre regions are excluded because of a charged LSP and/or a tachyon, and the green regions are excluded by decay. There is no consistent electroweak vacuum in the purple regions in the upper panels. In the dark blue strips the relic LSP density lies within the range allowed by cosmology, and the dashed red lines are contours of as calculated using FeynHiggs 2.10.0. The solid black, blue, green and purple lines in each panel are particle exclusion reaches for searches with LHC at 8 TeV, 300 and 3000/fb with LHC at 14 TeV, and 3000/fb with HE-LHC at 33 TeV, respectively

Mentions: Another possibility is the focus-point strip [56, 57, 134–137], which appears at higher values of the ratio , adjacent to the boundary of the region where one can find a consistent electroweak vacuum, and generally lies beyond the reach of the LHC searches discussed earlier. Along this strip, the Higgsino component of the neutralino LSP is enhanced, and its annihilations and coannihilations with heavier neutralinos and charginos are enhanced. Various studies have shown that the focus-point strip may extend to very large values of and , with and . The upper panels of Fig. 23 display a pair of focus-point strips for and (left panel) and 52 (right panel), assuming  GeV.12 The regions of these planes where there is no consistent electroweak vacuum are coloured purple, the ochre regions at lower are excluded because of a charged LSP and/or a tachyon, and the green shaded regions are excluded by decay.13Fig. 23


Collider Interplay for Supersymmetry, Higgs and Dark Matter.

Buchmueller O, Citron M, Ellis J, Guha S, Marrouche J, Olive KA, de Vries K, Zheng J - Eur Phys J C Part Fields (2015)

Upper panels the  planes for  and  (left panel) and 40 (right panel), displaying focus-point strips. Lower panels the  planes for  and  (left panel), and  (right panel). In each panel, the ochre regions are excluded because of a charged LSP and/or a tachyon, and the green regions are excluded by  decay. There is no consistent electroweak vacuum in the purple regions in the upper panels. In the dark blue strips the relic LSP density lies within the range allowed by cosmology, and the dashed red lines are contours of  as calculated using FeynHiggs 2.10.0. The solid black, blue, green and purple lines in each panel are particle exclusion reaches for  searches with LHC at 8 TeV, 300 and 3000/fb with LHC at 14 TeV, and 3000/fb with HE-LHC at 33 TeV, respectively
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4591918&req=5

Fig23: Upper panels the planes for and (left panel) and 40 (right panel), displaying focus-point strips. Lower panels the planes for and (left panel), and (right panel). In each panel, the ochre regions are excluded because of a charged LSP and/or a tachyon, and the green regions are excluded by decay. There is no consistent electroweak vacuum in the purple regions in the upper panels. In the dark blue strips the relic LSP density lies within the range allowed by cosmology, and the dashed red lines are contours of as calculated using FeynHiggs 2.10.0. The solid black, blue, green and purple lines in each panel are particle exclusion reaches for searches with LHC at 8 TeV, 300 and 3000/fb with LHC at 14 TeV, and 3000/fb with HE-LHC at 33 TeV, respectively
Mentions: Another possibility is the focus-point strip [56, 57, 134–137], which appears at higher values of the ratio , adjacent to the boundary of the region where one can find a consistent electroweak vacuum, and generally lies beyond the reach of the LHC searches discussed earlier. Along this strip, the Higgsino component of the neutralino LSP is enhanced, and its annihilations and coannihilations with heavier neutralinos and charginos are enhanced. Various studies have shown that the focus-point strip may extend to very large values of and , with and . The upper panels of Fig. 23 display a pair of focus-point strips for and (left panel) and 52 (right panel), assuming  GeV.12 The regions of these planes where there is no consistent electroweak vacuum are coloured purple, the ochre regions at lower are excluded because of a charged LSP and/or a tachyon, and the green shaded regions are excluded by decay.13Fig. 23

Bottom Line: If supersymmetry is not discovered at the LHC, it is likely to lie somewhere along a focus-point, stop-coannihilation strip or direct-channel A / H resonance funnel.We discuss the prospects for discovering supersymmetry along these strips at a future circular proton-proton collider such as FCC-hh.Illustrative benchmark points on these strips indicate that also in this case FCC-ee could provide tests of the CMSSM at the loop level.

View Article: PubMed Central - PubMed

Affiliation: High Energy Physics Group, Blackett Lab., Imperial College, Prince Consort Road, London, SW7 2AZ UK.

ABSTRACT

We discuss the potential impacts on the CMSSM of future LHC runs and possible [Formula: see text] and higher-energy proton-proton colliders, considering searches for supersymmetry via  [Formula: see text] events, precision electroweak physics, Higgs measurements and dark matter searches. We validate and present estimates of the physics reach for exclusion or discovery of supersymmetry via [Formula: see text] searches at the LHC, which should cover the low-mass regions of the CMSSM parameter space favoured in a recent global analysis. As we illustrate with a low-mass benchmark point, a discovery would make possible accurate LHC measurements of sparticle masses using the MT2 variable, which could be combined with cross-section and other measurements to constrain the gluino, squark and stop masses and hence the soft supersymmetry-breaking parameters [Formula: see text] and [Formula: see text] of the CMSSM. Slepton measurements at CLIC would enable [Formula: see text] and [Formula: see text] to be determined with high precision. If supersymmetry is indeed discovered in the low-mass region, precision electroweak and Higgs measurements with a future circular [Formula: see text] collider (FCC-ee, also known as TLEP) combined with LHC measurements would provide tests of the CMSSM at the loop level. If supersymmetry is not discovered at the LHC, it is likely to lie somewhere along a focus-point, stop-coannihilation strip or direct-channel A / H resonance funnel. We discuss the prospects for discovering supersymmetry along these strips at a future circular proton-proton collider such as FCC-hh. Illustrative benchmark points on these strips indicate that also in this case FCC-ee could provide tests of the CMSSM at the loop level.

No MeSH data available.


Related in: MedlinePlus