Model independent constraints among the Wtb, Zbb, and Ztt couplings
- High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
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, Ztt, and Zbb 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}xU(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 Ztt 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.
- OSTI ID:
- 21325235
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 7; Other Information: DOI: 10.1103/PhysRevD.80.074020; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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