Top-Quark Pairs at High Invariant Mass: A Model-Independent Discriminator of New Physics at the Large Hadron Collider

Journal Article · Fri Jan 25 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.031801· OSTI ID:21020962

Barger, Vernon; Tao, Han; Walker, Devin G. E. ^[1]

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1. Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States)

We study top-quark pair production to probe new physics at the CERN Large Hadron Collider. We propose reconstruction methods for tt semileptonic events and use them to reconstruct the tt invariant mass. The angular distribution of top quarks in their c.m. frame can determine the spin and production subprocess for each new physics resonance. Forward-backward asymmetry and CP-odd variables can be constructed to further delineate the nature of new physics. We parametrize the new resonances with a few generic parameters and show high invariant mass top pair production may provide an early indicator for new physics beyond the standard model.

• OSTI ID: 21020962
• Journal Information: Physical Review Letters, Vol. 100, Issue 3; Other Information: DOI: 10.1103/PhysRevLett.100.031801; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
ASYMMETRY
CERN
CERN LHC
MASS
PAIR PRODUCTION
RESONANCE
SPIN
STANDARD MODEL
T QUARKS