Publications [#308186] of Ashutosh V. Kotwal

Papers Published
  1. Abazov, VM; Abbott, B; Abdesselam, A; Abolins, M; Abramov, V; Acharya, BS; Adams, DL; Adams, M; Ahmed, SN; Alexeev, GD; Alves, GA; Amos, N; Anderson, EW; Arnoud, Y; Baarmand, MM; Babintsev, VV; Babukhadia, L; Bacon, TC; Baden, A; Baldin, B; Balm, PW; Banerjee, S; Barberis, E; Baringer, P; Barreto, J; Bartlett, JF; Bassler, U; Bauer, D; Bean, A; Begel, M; Belyaev, A; Beri, SB; Bernardi, G; Bertram, I; Besson, A; Beuselinck, R; Bezzubov, VA; Bhat, PC; Bhatnagar, V; Bhattacharjee, M; Blazey, G et al., Search for first-generation scalar and vector leptoquarks, Physical Review D: Particles, Fields, Gravitation and Cosmology, vol. 64 no. 9 (2001) .

    We describe a search for the pair production of first-generation scalar and vector leptoquarks in the eejj and evjj channels by the DØ Collaboration. The data are from the 1992-1996 pp̄ run at √s=1.8 TeV 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 eejj and evjj channels are combined with those from a previous DØ analysis of the vvjj channel to obtain 95% confidence level (C.L.) upper limits on the leptoquark pair-production cross section as a function of mass and of β, 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 GeV/c2 for β=1, 1/2, and 0, respectively. For vector leptoquarks with gauge (Yang-Mills) couplings, 95% C.L. lower limits of 345, 337, and 206 GeV/c2 are set on the mass for β=1, 1/2, and 0, respectively. Mass limits for vector leptoquarks are also set for anomalous vector couplings. ©2001 The American Physical Society.