Publications [#308247] of Ashutosh V. Kotwal

Papers Published
  1. Abachi, S; Abbott, B; Abolins, M; Acharya, BS; Adam, I; Adams, DL; Adams, M; Ahn, S; Aihara, H; Alves, GA; Amidi, E; Amos, N; Anderson, EW; Astur, R; Baarmand, MM; Baden, A; Balamurali, V; Balderston, J; Baldin, B; Banerjee, S; Bantly, J; Bartlett, JF; Bazizi, K; Belyaev, A; Beri, SB; Bertram, I; Bezzubov, VA; Bhat, PC; Bhatnagar, V; Bhattacharjee, M; Biswas, N; Blazey, G; Blessing, S; Bloom, P; Boehnlein, A; Bojko, NI; Borcherding, F; Borders, J; Boswell, C; Brandt, A; Brock, R; Bross, A et al., Search for a fourth generation charge -1/3 quark via flavor changing neutral current decay, Physical Review Letters, vol. 78 no. 20 (1997), pp. 3818-3823 .

    We report on a search for pair production of a fourth generation charge -1/3 quark (b′) in p p̄ collisions at √s = 1.8 TcV by the DØ experiment at the Fermilab Tevatron using an integrated luminosity of 93 pb-1. Both b′ quarks are assumed to decay via flavor changing neutral currents (FCNC). The search uses the signatures γ + 3 jets + μ-tag and 2y + 2 jets. We see no significant excess of events over the expected background. We place an upper limit on the production cross section times branching fraction that is well below theoretical expectations for a b′ decaying exclusively via FCNC for b′ masses up to mz + mb.