TY - JOUR
T1 - Constraining the dipole moments of the top quark
AU - Kamenik, Jernej F.
AU - Papucci, Michele
AU - Weiler, Andreas
PY - 2012/4/25
Y1 - 2012/4/25
N2 - We investigate the direct and indirect bounds on dipole operators involving the top quark. A careful analysis shows that the experimental upper limit on the neutron electric dipole moment strongly constrains the chromo-electric dipole of the top. We improve previous bounds by 2 orders of magnitude. This has significant implications for new physics models and it also means that CP violation in top pair production mediated by dipole operators will not be accessible at the LHC. The CP conserving chromo-magnetic dipole moments are constrained by recent measurements of the tt̄ spectrum by the ATLAS collaboration. We also update the indirect constraints on electric and magnetic dipole moments from radiative b→s transitions, finding that they can be considerably larger than their colored counterparts.
AB - We investigate the direct and indirect bounds on dipole operators involving the top quark. A careful analysis shows that the experimental upper limit on the neutron electric dipole moment strongly constrains the chromo-electric dipole of the top. We improve previous bounds by 2 orders of magnitude. This has significant implications for new physics models and it also means that CP violation in top pair production mediated by dipole operators will not be accessible at the LHC. The CP conserving chromo-magnetic dipole moments are constrained by recent measurements of the tt̄ spectrum by the ATLAS collaboration. We also update the indirect constraints on electric and magnetic dipole moments from radiative b→s transitions, finding that they can be considerably larger than their colored counterparts.
UR - http://www.scopus.com/inward/record.url?scp=84860487797&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.85.071501
DO - 10.1103/PhysRevD.85.071501
M3 - Article
AN - SCOPUS:84860487797
SN - 1550-7998
VL - 85
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 7
M1 - 071501
ER -