title: Top B physics at the LHC.
abstract: In top-pair events where at least one of the tops decays semileptonically, the identification of the lepton charge allows us to tag not only the top quark charge but also that of the subsequent b quark. In cases where the b also decays semileptonically, the charge of the two leptons can be used to probe CP violation in heavy flavor mixing and decays. This strategy to measure CP violation is independent of those adopted so far in experiments, and can already constrain non standard model sources of CP violation with current and near future LHC data. To demonstrate the potential of this method we construct two CP asymmetries based on same-sign and opposite-sign leptons and estimate their sensitivities. This proposal opens a new window for doing precision measurements of CP violation in b and c quark physics via high p(T) processes at ATLAS and CMS.
authors.affiliation: Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Oram
authors.initials: O
authors.lastname: Gedalia
authors.affiliation: Theory Division, CERN, CH1211 Geneva 23, Switzerland and Laboratori Nazionali di Frascati, INFN, Via Enrico Fermi 40, 00044 Frascati, Italy.
authors.forename: Gino
authors.initials: G
authors.lastname: Isidori
authors.affiliation: Centre for Cosmology, Particle Physics and Phenomenology CP3, Université Catholique de Louvain, Chemin du Cyclotron, 1348 Louvain la Neuve, Belgium.
authors.forename: Fabio
authors.initials: F
authors.lastname: Maltoni
authors.affiliation: Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel and Theory Division, CERN, CH1211 Geneva 23, Switzerland.
authors.forename: Gilad
authors.initials: G
authors.lastname: Perez
authors.affiliation: Centre for Cosmology, Particle Physics and Phenomenology CP3, Université Catholique de Louvain, Chemin du Cyclotron, 1348 Louvain la Neuve, Belgium.
authors.forename: Michele
authors.initials: M
authors.lastname: Selvaggi
authors.affiliation: Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: Yotam
authors.initials: Y
authors.lastname: Soreq