Early supersymmetry discovery at the CERN LHC without missing E{sub T}: The role of multileptons
- Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
Traditional searches for supersymmetry (SUSY) at hadron colliders rely heavily on the presence of large missing transverse energy (ME{sub T}) to reject background compared to signal. On the other hand, initial searches for new physics at the CERN LHC may not be able to rely on ME{sub T} due to a variety of detector calibration issues. We show that much of SUSY parameter space is accessible to discovery even without using ME{sub T}, and with rather low integrated luminosities, 0.1-1 fb{sup -1}. A key role is played by isolated lepton multiplicity which arises from gluino and squark cascade decays. Requiring {>=}3 isolated leptons plus jets yields a high rate of background rejection compared to signal. We find an LHC reach in m{sub g}-tilde of about 700-750 GeV for just 0.1 fb{sup -1} of integrated luminosity by requiring events with {>=}4 jets plus {>=}3 isolated leptons but without using ME{sub T}. If a large enough event sample is assembled, then kinematic reconstruction of sparticle mass properties should be possible just as in the case where large missing E{sub T} is required. SUSY without ME{sub T} can also be seen in opposite-sign/same flavor dilepton plus jets events when a characteristic invariant mass edge stands out against background.
- OSTI ID:
- 21249746
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 77, Issue 5; Other Information: DOI: 10.1103/PhysRevD.77.055017; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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