Search for first-generation scalar and vector leptoquarks

V. M. Abazov, B. Abbott, A. Abdesselam, M. Abolins, V. Abramov, B. S. Acharya, D. L. Adams, M. Adams, S. N. Ahmed, G. D. Alexeev, G. A. Alves, N. Amos, E. W. Anderson, Y. Arnoud, M. M. Baarmand, V. V. Babintsev, L. Babukhadia, T. C. Bacon, A. Baden, B. BaldinP. W. Balm, S. Banerjee, E. Barberis, P. Baringer, J. Barreto, J. F. Bartlett, U. Bassler, D. Bauer, A. Bean, M. Begel, A. Belyaev, S. B. Beri, G. Bernardi, I. Bertram, A. Besson, R. Beuselinck, V. A. Bezzubov, P. C. Bhat, V. Bhatnagar, M. Bhattacharjee, G. Blazey, S. Blessing, A. Boehnlein, N. I. Bojko, F. Borcherding, K. Bos, A. Brandt, R. Breedon, G. Briskin, R. Brock, G. Brooijmans, A. Bross, D. Buchholz, M. Buehler, V. Buescher, V. S. Burtovoi, J. M. Butler, F. Canelli, W. Carvalho, D. Casey, Z. Casilum, H. Castilla-Valdez, D. Chakraborty, K. M. Chan, S. V. Chekulaev, D. K. Cho, S. Choi, S. Chopra, J. H. Christenson, M. Chung, D. Claes, A. R. Clark, J. Cochran, L. Coney, B. Connolly, W. E. Cooper, D. Coppage, S. Crépé-Renaudin, M. A.C. Cummings, D. Cutts, G. A. Davis, K. Davis, K. De, S. J. Jong, K. Del Signore, M. Demarteau, R. Demina, P. Demine, D. Denisov, S. P. Denisov, S. Desai, H. T. Diehl, M. Diesburg, G. Loreto, S. Doulas, P. Draper, Y. Ducros, L. V. Dudko, S. Duensing, L. Duflot

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Abstract

We describe a search for the pair production of first-generation scalar and vector leptoquarks in the [Formula Presented] and [Formula Presented] channels by the DØ Collaboration. The data are from the 1992–1996 [Formula Presented] run at [Formula Presented] at the Fermilab Tevatron collider. We find no evidence for leptoquark production; in addition, no kinematically interesting events are observed using relaxed selection criteria. The results from the [Formula Presented] and [Formula Presented] channels are combined with those from a previous DØ analysis of the [Formula Presented] channel to obtain 95% confidence level (C.L.) upper limits on the leptoquark pair-production cross section as a function of mass and of [Formula Presented] the branching fraction to a charged lepton. These limits are compared to next-to-leading-order theory to set 95% C.L. lower limits on the mass of a first-generation scalar leptoquark of 225, 204, and 79 [Formula Presented] for [Formula Presented] [Formula Presented] and 0, respectively. For vector leptoquarks with gauge (Yang-Mills) couplings, 95% C.L. lower limits of 345, 337, and 206 [Formula Presented] are set on the mass for [Formula Presented] [Formula Presented] and 0, respectively. Mass limits for vector leptoquarks are also set for anomalous vector couplings. © 2001 The American Physical Society.
Original languageEnglish
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
DOIs
Publication statusPublished - 1 Jan 2001
Externally publishedYes

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    Abazov, V. M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., Acharya, B. S., Adams, D. L., Adams, M., Ahmed, S. N., Alexeev, G. D., Alves, G. A., Amos, N., Anderson, E. W., Arnoud, Y., Baarmand, M. M., Babintsev, V. V., Babukhadia, L., Bacon, T. C., Baden, A., ... Duflot, L. (2001). Search for first-generation scalar and vector leptoquarks. Physical Review D - Particles, Fields, Gravitation and Cosmology. https://doi.org/10.1103/PhysRevD.64.092004