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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.


The unit-normalised  invariant-mass distribution resulting from a simulation of  production at the LHC at 14 TeV. Left panel for the best-fit  and  masses of 2280 and 1020 GeV (green histogram), compared with the Standard Model background (black histogram) and simulations with  masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of . Right panel similarly for the best-fit  and  masses (green histogram), compared with the Standard Model background (black histogram) and simulations with  masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of
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Fig11: The unit-normalised invariant-mass distribution resulting from a simulation of production at the LHC at 14 TeV. Left panel for the best-fit and masses of 2280 and 1020 GeV (green histogram), compared with the Standard Model background (black histogram) and simulations with masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of . Right panel similarly for the best-fit and masses (green histogram), compared with the Standard Model background (black histogram) and simulations with masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of

Mentions: The left panel of Fig. 11 displays the shape of the unit-normalised invariant-mass distribution resulting from a simulation of such events using Pythia 8 [112, 113] and the MSTW2008NLO parton distribution functions [114], produced with the nominal CMSSM best-fit values of  GeV and  GeV (green histogram), compared with the Standard Model background (black histogram), which is sharply peaked at low invariant masses close to the threshold. Also shown in Fig. 11 are the invariant-mass distributions for masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of . As expected, the higher (lower) mass gives a longer (shorter) tail in the invariant-mass distribution. On the other hand, as we see in the right panel of Fig. 11 that the invariant mass distribution in decays is almost independent of for fixed .Fig. 10


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 unit-normalised  invariant-mass distribution resulting from a simulation of  production at the LHC at 14 TeV. Left panel for the best-fit  and  masses of 2280 and 1020 GeV (green histogram), compared with the Standard Model background (black histogram) and simulations with  masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of . Right panel similarly for the best-fit  and  masses (green histogram), compared with the Standard Model background (black histogram) and simulations with  masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig11: The unit-normalised invariant-mass distribution resulting from a simulation of production at the LHC at 14 TeV. Left panel for the best-fit and masses of 2280 and 1020 GeV (green histogram), compared with the Standard Model background (black histogram) and simulations with masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of . Right panel similarly for the best-fit and masses (green histogram), compared with the Standard Model background (black histogram) and simulations with masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of
Mentions: The left panel of Fig. 11 displays the shape of the unit-normalised invariant-mass distribution resulting from a simulation of such events using Pythia 8 [112, 113] and the MSTW2008NLO parton distribution functions [114], produced with the nominal CMSSM best-fit values of  GeV and  GeV (green histogram), compared with the Standard Model background (black histogram), which is sharply peaked at low invariant masses close to the threshold. Also shown in Fig. 11 are the invariant-mass distributions for masses 300 GeV above (red histogram) and 300 GeV below (blue histogram) the nominal value of . As expected, the higher (lower) mass gives a longer (shorter) tail in the invariant-mass distribution. On the other hand, as we see in the right panel of Fig. 11 that the invariant mass distribution in decays is almost independent of for fixed .Fig. 10

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.