Light stop searches at the LHC in events with two b jets and missing energy

Journal Article · Tue Feb 01 00:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.035008· OSTI ID:21504910

Bornhauser, S; Drees, M; Grab, S; Kim, J S ^[1]

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1. Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 (United States)

We propose a new method to discover light top squarks (stops) in the co-annihilation region at the Large Hadron Collider (LHC). The bino-like neutralino is the lightest supersymmetric particle (LSP) and the lighter stop is the next-to-LSP. Such scenarios can be consistent with electroweak baryogenesis and also with dark matter constraints. We consider the production of two stops in association with two b-quarks, including pure QCD as well as mixed electroweak-QCD contributions. The stops decay into a charm quark and the LSP. For a higgsino-like light chargino, the electroweak contributions can exceed the pure QCD prediction. We show the size of the electroweak contributions as a function of the stop mass and present the LHC discovery reach in the stop-neutralino mass plane.

• OSTI ID: 21504910
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevD.83.035008; (c) 2011 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
B QUARKS
BARYONS
CERN LHC
FORECASTING
MASS
NONLUMINOUS MATTER
PARTICLE DECAY
PARTICLE PRODUCTION
QUANTUM CHROMODYNAMICS
SPARTICLES
T QUARKS
WEINBERG-SALAM GAUGE MODEL
ACCELERATORS
BEAUTY PARTICLES
CYCLIC ACCELERATORS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
INTERACTIONS
MATHEMATICAL MODELS
MATTER
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARKS
STORAGE RINGS
SYNCHROTRONS
TOP PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES