Top-pair forward-backward asymmetry beyond next-to-leading order

Journal Article · Sat Oct 01 00:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.84.074004· OSTI ID:21607762

Ahrens, Valentin; Neubert, Matthias; Pecjak, Ben D ^[1]; Ferroglia, Andrea ^[2]; Lilin, Yang ^[3]

---

1. Institut fuer Physik (THEP), Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany)
2. New York City College of Technology, 300 Jay Street, Brooklyn, New York 11201 (United States)
3. Institute for Theoretical Physics, University of Zuerich, CH-8057 Zuerich (Switzerland)

We make use of recent results in effective theory and higher-order perturbative calculations to improve the theoretical predictions of the QCD contribution to the top-quark pair production forward-backward asymmetry at the Tevatron. In particular, we supplement the fixed-order next-to-leading order calculation with higher-order corrections from soft-gluon resummation at next-to next-to-leading order accuracy performed in two different kinematic schemes, which allows us to make improved predictions for the asymmetry in the pp and tt rest frames as a function of the rapidity and invariant mass of the tt pair. Furthermore, we provide binned results which can be compared with the recent measurements of the forward-backward asymmetry in events with a large pair invariant mass or rapidity difference. Finally, we calculate at NLO+NNLL order the top-quark charge asymmetry at the LHC as a function of a lower rapidity cutoff for the top and antitop quarks.

• OSTI ID: 21607762
• Journal Information: Physical Review. D, Particles Fields, Vol. 84, Issue 7; Other Information: DOI: 10.1103/PhysRevD.84.074004; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
ASYMMETRY
CERN LHC
CORRECTIONS
FERMILAB TEVATRON
GLUONS
MASS
PAIR PRODUCTION
PARTICLE RAPIDITY
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
T QUARKS
ACCELERATORS
BOSONS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARKS
STORAGE RINGS
SYNCHROTRONS
TOP PARTICLES