Abstract
Recent experimental results from the CDF collaboration which study the top forward-backward asymmetry have strengthened the case that new physics is playing a role in tt̄ production. Here, we propose a set of measurements, built from the charged lepton kinematics in semileptonic and fully leptonic tt̄ events, designed to further probe the underlying causes of this asymmetry both at the Tevatron and at the LHC. Using a set of conservative reference models, we find that measurements of the charged lepton asymmetry, top polarization, and tt̄ spin correlation can establish the existence of new physics and distinguish between competing models both at the Tevatron and the LHC. At the Tevatron, discrimination between models is possible at the 3σ level. At the LHC, we demonstrate that a top forward-backward asymmetry can be established at 3σ in the first ∼5fb-1 of data and show how competing explanations can be further disentangled.
| Original language | English (US) |
|---|---|
| Article number | 074034 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 84 |
| Issue number | 7 |
| DOIs | |
| State | Published - Oct 27 2011 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)
Cite this
Polarized view of the top asymmetry. / Krohn, David; Liu, Tao; Shelton, Jessie; Wang, Lian Tao.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 84, No. 7, 074034, 27.10.2011.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Polarized view of the top asymmetry
AU - Krohn, David
AU - Liu, Tao
AU - Shelton, Jessie
AU - Wang, Lian Tao
PY - 2011/10/27
Y1 - 2011/10/27
N2 - Recent experimental results from the CDF collaboration which study the top forward-backward asymmetry have strengthened the case that new physics is playing a role in tt̄ production. Here, we propose a set of measurements, built from the charged lepton kinematics in semileptonic and fully leptonic tt̄ events, designed to further probe the underlying causes of this asymmetry both at the Tevatron and at the LHC. Using a set of conservative reference models, we find that measurements of the charged lepton asymmetry, top polarization, and tt̄ spin correlation can establish the existence of new physics and distinguish between competing models both at the Tevatron and the LHC. At the Tevatron, discrimination between models is possible at the 3σ level. At the LHC, we demonstrate that a top forward-backward asymmetry can be established at 3σ in the first ∼5fb-1 of data and show how competing explanations can be further disentangled.
AB - Recent experimental results from the CDF collaboration which study the top forward-backward asymmetry have strengthened the case that new physics is playing a role in tt̄ production. Here, we propose a set of measurements, built from the charged lepton kinematics in semileptonic and fully leptonic tt̄ events, designed to further probe the underlying causes of this asymmetry both at the Tevatron and at the LHC. Using a set of conservative reference models, we find that measurements of the charged lepton asymmetry, top polarization, and tt̄ spin correlation can establish the existence of new physics and distinguish between competing models both at the Tevatron and the LHC. At the Tevatron, discrimination between models is possible at the 3σ level. At the LHC, we demonstrate that a top forward-backward asymmetry can be established at 3σ in the first ∼5fb-1 of data and show how competing explanations can be further disentangled.
UR - http://www.scopus.com/inward/record.url?scp=80555148676&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80555148676&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.84.074034
DO - 10.1103/PhysRevD.84.074034
M3 - Article
AN - SCOPUS:80555148676
VL - 84
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 7
M1 - 074034
ER -