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.


Contours where it is possible to attain at the 95 % CL  GeV, indicated by solid green (black) lines, are overlaid on the  plane in the CMSSM, with the same CL contours and best-fit point from a global fit [33] as displayed previously in Fig. 1
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4591918&req=5

Fig13: Contours where it is possible to attain at the 95 % CL  GeV, indicated by solid green (black) lines, are overlaid on the plane in the CMSSM, with the same CL contours and best-fit point from a global fit [33] as displayed previously in Fig. 1

Mentions: The most direct possibility would be pair production and measurement of electroweakly interacting sparticles. The next-to-lightest supersymmetric particle (NLSP) is expected, in generic regions of the CMSSM parameter space, to be the lighter stau slepton . Accordingly, Fig. 13 displays, superimposed on the same CMSSM plane discussed previously, contours showing where it is possible at the 95 % CL to attain  GeV (green), the largest mass that could be pair-produced with an  TeV linear collider, and 1500 GeV (black), the largest mass that could be pair-produced with an -TeV linear collider such as CLIC. These contours are restricted to the regions within the 68 and 95 % CL regions found in the recent global fit [33], where the CMSSM parameter space is well sampled. We see that the  GeV line crosses the ‘Crimea’ region, whereas the  GeV lines reach deep into the ‘Eurasia’ region. In particular, the low-mass best-fit point in the CMSSM lies within the  GeV reach of a 1-TeV collider. In the low-mass ‘Crimea’ region, the cold dark matter density is brought into the range acceptable to cosmology by coannihilation with the stau, so the  GeV contour has almost constant. On the other hand, in the ‘Eurasia’ region other mechanisms such as neutralino annihilation via direct-channel heavy Higgs poles come into play, and the  GeV contour has a more complicated shape.Fig. 13


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)

Contours where it is possible to attain at the 95 % CL  GeV, indicated by solid green (black) lines, are overlaid on the  plane in the CMSSM, with the same CL contours and best-fit point from a global fit [33] as displayed previously in Fig. 1
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig13: Contours where it is possible to attain at the 95 % CL  GeV, indicated by solid green (black) lines, are overlaid on the plane in the CMSSM, with the same CL contours and best-fit point from a global fit [33] as displayed previously in Fig. 1
Mentions: The most direct possibility would be pair production and measurement of electroweakly interacting sparticles. The next-to-lightest supersymmetric particle (NLSP) is expected, in generic regions of the CMSSM parameter space, to be the lighter stau slepton . Accordingly, Fig. 13 displays, superimposed on the same CMSSM plane discussed previously, contours showing where it is possible at the 95 % CL to attain  GeV (green), the largest mass that could be pair-produced with an  TeV linear collider, and 1500 GeV (black), the largest mass that could be pair-produced with an -TeV linear collider such as CLIC. These contours are restricted to the regions within the 68 and 95 % CL regions found in the recent global fit [33], where the CMSSM parameter space is well sampled. We see that the  GeV line crosses the ‘Crimea’ region, whereas the  GeV lines reach deep into the ‘Eurasia’ region. In particular, the low-mass best-fit point in the CMSSM lies within the  GeV reach of a 1-TeV collider. In the low-mass ‘Crimea’ region, the cold dark matter density is brought into the range acceptable to cosmology by coannihilation with the stau, so the  GeV contour has almost constant. On the other hand, in the ‘Eurasia’ region other mechanisms such as neutralino annihilation via direct-channel heavy Higgs poles come into play, and the  GeV contour has a more complicated shape.Fig. 13

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.