Top quark forward-backward asymmetry at the Tevatron and its implications at the LHC

Journal Article · Sun May 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.091501· OSTI ID:21541564

Bhattacherjee, Biplob; Biswal, Sudhansu S; Ghosh, Diptimoy ^[1]

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1. Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005 (India)

The measurement of forward-backward asymmetry in the top and antitop quark (tt) production has been recently reconfirmed by the CDF Collaboration and shows a more than 3{sigma} deviation from the standard model prediction in the large tt invariant mass region. Models with new W{sup '} or Z{sup '} bosons have been invoked to explain this deviation. In the context of these models we perform a {chi}{sup 2} analysis with all the available experimental numbers in different {Delta}Y and M{sub tt} bins. We show that for the Z{sup '} model the region of parameter space which explains the Tevatron asymmetry can be probed in the same sign top production channel by Tevatron itself. Moreover, we consider a recently proposed observable, the one-sided forward-backward asymmetry (A{sub OFB}) at the LHC and conclude that both the W{sup '} and Z{sup '} models can lead to sizable A{sub OFB} even at the LHC running at a center of mass energy of 7 TeV for the model parameters consistent with the Tevatron measurements.

• OSTI ID: 21541564
• Journal Information: Physical Review. D, Particles Fields, Vol. 83, Issue 9; Other Information: DOI: 10.1103/PhysRevD.83.091501; (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
ASYMMETRY
BOSONS
CERN LHC
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
FORECASTING
MASS
PARTICLE PRODUCTION
STANDARD MODEL
T QUARKS
TEV RANGE 01-10
ACCELERATORS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARKS
RADIATION DETECTORS
STORAGE RINGS
SYNCHROTRONS
TEV RANGE
TOP PARTICLES
UNIFIED GAUGE MODELS