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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

The spectrum at the best-fit point in the CMSSM [33], whose parameters are listed in Table 1. The magnitudes of the branching ratios for sparticle decays into different final-state particles are represented by the strengths of the dashed lines connecting them
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Fig2: The spectrum at the best-fit point in the CMSSM [33], whose parameters are listed in Table 1. The magnitudes of the branching ratios for sparticle decays into different final-state particles are represented by the strengths of the dashed lines connecting them

Mentions: Assuming that Nature is described by supersymmetry at the CMSSM low-mass best-fit point, the sparticle mass spectrum is determined, as illustrated in Fig. 2. The most relevant sparticles for searches at the LHC are those with the highest production cross sections, namely squarks and gluinos. At the best-fit point, the mass of a generic right-handed u, d, s, c or b squark is calculated to be  GeV, and the lighter stop squark has a mass  GeV. Also,  GeV and the lightest neutralino mass  GeV. The lighter stau mass is only very slightly heavier: at the best-fit point and the rest of the low-mass region stau- coannihilation is responsible for bringing the relic density into the range allowed by cosmology. In the following we consider the possible LHC measurements of generic right-handed squarks , gluinos and the lighter stop , with either 300 or 3000/fb of luminosity at LHC14. We assume that experiments at the LHC discover supersymmetry with the mass spectrum characteristic of the best-fit point shown in Fig. 2, and we ask how accurately its parameters can be measured.


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)

The spectrum at the best-fit point in the CMSSM [33], whose parameters are listed in Table 1. The magnitudes of the branching ratios for sparticle decays into different final-state particles are represented by the strengths of the dashed lines connecting them
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig2: The spectrum at the best-fit point in the CMSSM [33], whose parameters are listed in Table 1. The magnitudes of the branching ratios for sparticle decays into different final-state particles are represented by the strengths of the dashed lines connecting them
Mentions: Assuming that Nature is described by supersymmetry at the CMSSM low-mass best-fit point, the sparticle mass spectrum is determined, as illustrated in Fig. 2. The most relevant sparticles for searches at the LHC are those with the highest production cross sections, namely squarks and gluinos. At the best-fit point, the mass of a generic right-handed u, d, s, c or b squark is calculated to be  GeV, and the lighter stop squark has a mass  GeV. Also,  GeV and the lightest neutralino mass  GeV. The lighter stau mass is only very slightly heavier: at the best-fit point and the rest of the low-mass region stau- coannihilation is responsible for bringing the relic density into the range allowed by cosmology. In the following we consider the possible LHC measurements of generic right-handed squarks , gluinos and the lighter stop , with either 300 or 3000/fb of luminosity at LHC14. We assume that experiments at the LHC discover supersymmetry with the mass spectrum characteristic of the best-fit point shown in Fig. 2, and we ask how accurately its parameters can be measured.

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