We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Top Quark Asymmetries.
- Authors
Chwalek, Thorsten; Déliot, Frédéric
- Abstract
The production of top quark pairs (t t ¯ ) via the quark-antiquark initial state is not symmetric under the exchange of top quark and antiquark. Calculations of this next-to-leading order effect predict asymmetries of about one to a few percent, depending on the centre-of-mass energy and the selected phase space. Experimentally, this charge asymmetry of t t ¯ production manifests itself in differences in angular distributions between top quarks and antiquarks. Sensitive observables are the rapidities of the produced top quarks and antiquarks as well as their energies. In dileptonic t t ¯ events, the asymmetry of the t t ¯ system is reflected in a similar asymmetry in the system of the produced lepton pair, with the crucial advantage of a simpler reconstruction procedure. In this article we review the measurements of this effect in different final states and using different observables by the ATLAS and CMS Collaborations in LHC collisions at three different centre-of-mass energies.
- Subjects
TOP quarks; ANGULAR distribution (Nuclear physics); PHASE space; QUARKS
- Publication
Universe (2218-1997), 2022, Vol 8, Issue 12, p622
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe8120622