Search for anomalous Wtb couplings in single top quark production in ppbar collisions at sqrt(s) = 1.96 TeV

• Published in: Physics letters. B 2012, Vol.708, p.21-26
• Main Authors: Abazov, V.M., Abbott, B., Acharya, B.S., Adams, M., Adams, T., Alexeev, G.D., Alkhazov, G., Alton, A., Alverson, G., Alves, G.A., Aoki, M., Askew, A., Asman, B., Atkins, S., Atramentov, O., Augsten, K., Avila, C., Backusmayes, J., Badaud, F., Bagby, L., Baldin, B., Bandurin, D.V., Banerjee, S., Barberis, E., Baringer, P., Barreto, J., Bartlett, J.F., Bassler, U., Bazterra, V., Bean, A., Begalli, M., Belanger-Champagne, C., Bellantoni, L., Beri, S.B., Bernardi, G., Bernhard, R., Bertram, I., Besançon, M., Beuselinck, R., Bezzubov, V.A., Bhat, P.C., Bhatnagar, V., Blazey, G., Blessing, S., Bloom, K., Boehnlein, A., Boline, D., Boos, E.E., Borissov, G., Bose, T., Brandt, A., Brandt, O., Brock, R., Brooijmans, G., Bross, A., Brown, D., Brown, J., Bu, X.B., Buehler, M., Buescher, V., Bunichev, V., Burdin, S., Burnett, T.H., Buszello, C.P., Calpas, B., Camacho-Pérez, E., Carrasco-Lizarraga, M.A., Casey, B.C.K., Castilla-Valdez, H., Chakrabarti, S., Chakraborty, D., Chan, K.M., Chandra, A., Chapon, E., Chen, G., Chevalier-Théry, S., Cho, D.K., Cho, S.W., Choi, S. K., Choudhary, B., Cihangir, S., Claes, D., Clutter, J., Cooke, M., Cooper, W.E., Corcoran, M., Couderc, F., Cousinou, M.-C., Croc, A., Cutts, D., Das, A., Davies, G., De, K., de Jong, S.J., de La Cruz-Burelo, E., Déliot, F., Demina, R., Denisov, D., Denisov, S.P., Desai, S.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0370-2693
• DOI: 10.1016/j.physletb.2012.01.014

We present new direct constraints on a general $Wtb$ interaction using data corresponding to an integrated luminosity of 5.4 fb$^{-1}$ collected by the D0 detector at the Tevatron $p\bar{p}$ collider. The standard model provides a purely left-handed vector coupling at the $Wtb$ vertex, while the most general, lowest dimension Lagrangian allows right-handed vector and left- or right-handed tensor couplings as well. We obtain precise limits on these anomalous couplings by comparing the data to the expectations from different assumptions on the $Wtb$ coupling.