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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

Scatter plots of the  (in GeV) of the jet emitted in  decay (horizontal axis) and the jet emitted in  decay (vertical axis) resulting from a simulation of gluino pair production at the LHC at 14 TeV. Left panel for the best-fit  and  masses. Right panel for the best-fit values of  but with  reduced by 300 GeV
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Fig6: Scatter plots of the (in GeV) of the jet emitted in decay (horizontal axis) and the jet emitted in decay (vertical axis) resulting from a simulation of gluino pair production at the LHC at 14 TeV. Left panel for the best-fit and masses. Right panel for the best-fit values of but with reduced by 300 GeV

Mentions: The upper and lower panels of Fig. 4 show that the mass difference is poorly constrained by the MT2 measurement, and this is reflected in the asymmetric distributions seen in Fig. 5. However, there are many other possible measurements at the LHC. In particular, we have considered the extra information that could be obtained from measurements of the (relatively) soft jet emitted in the decay , which would be monochromatic in the gluino rest frame. Figure 6 displays scatter plots of the of the jet emitted in decay (horizontal axis) and the jet emitted in decay (vertical axis) based on simulations of pair production. The left panel is for the best-fit values of and , and the right panel is for the same value of but with reduced by 300 GeV: the plots are clearly distinct.


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)

Scatter plots of the  (in GeV) of the jet emitted in  decay (horizontal axis) and the jet emitted in  decay (vertical axis) resulting from a simulation of gluino pair production at the LHC at 14 TeV. Left panel for the best-fit  and  masses. Right panel for the best-fit values of  but with  reduced by 300 GeV
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig6: Scatter plots of the (in GeV) of the jet emitted in decay (horizontal axis) and the jet emitted in decay (vertical axis) resulting from a simulation of gluino pair production at the LHC at 14 TeV. Left panel for the best-fit and masses. Right panel for the best-fit values of but with reduced by 300 GeV
Mentions: The upper and lower panels of Fig. 4 show that the mass difference is poorly constrained by the MT2 measurement, and this is reflected in the asymmetric distributions seen in Fig. 5. However, there are many other possible measurements at the LHC. In particular, we have considered the extra information that could be obtained from measurements of the (relatively) soft jet emitted in the decay , which would be monochromatic in the gluino rest frame. Figure 6 displays scatter plots of the of the jet emitted in decay (horizontal axis) and the jet emitted in decay (vertical axis) based on simulations of pair production. The left panel is for the best-fit values of and , and the right panel is for the same value of but with reduced by 300 GeV: the plots are clearly distinct.

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