Model independent constraints among the Wtb, Zb{bar b}, and Zt{bar t} couplings.

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRevD.80.074020· OSTI ID:977042

Berger, E L; Cao, Q -H; Low, I

Using an effective Lagrangian approach, we perform a model-independent analysis of the interactions among electroweak gauge bosons and the third generation quarks, i.e. the Wtb, Zt{bar t}, and Zb{bar b} couplings. After one imposes the known experimental constraint on the Zb{sub L}b{sub L} coupling, we show that the electroweak SU(2){sub L} x U(1){sub Y} symmetry of the standard model specifies the pattern of deviations of the Zt{sub L}t{sub L} and Wt{sub L}b{sub L} couplings, independent of underlying new physics scenarios. We study implications of the predicted pattern with data on the single top quark and Zt{bar t} associated production processes at the Large Hadron Collider. Such an analysis could in principle allow for a determination of the Wtb coupling without prior knowledge of |V{sub tb}|, which is otherwise difficult to achieve.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: SC; JTI Grant
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 977042
• Report Number(s): ANL-HEP-PR-09-48
• Journal Information: Phys. Rev. D, Journal Name: Phys. Rev. D Journal Issue: 2009 Vol. 80; ISSN PRVDAQ; ISSN 1550-7998
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
HADRONS
LAGRANGIAN FUNCTION
PHYSICS
PRODUCTION
QUARKS
STANDARD MODEL
SYMMETRY
T QUARKS