Searches For Prompt Heavy Quarkonia & B-C(+/-) Mesons And Evidence For Radially Excited B Mesons In Z(0) Decays

We have searched for prompt heavy quarkonia and B-c mesons in 3 x 10(6) hadronic Z(0) decays recorded with the DELPHI detector at LEP. No signal was observed in any of these modes. We achieved the highest sensitivities for gluon fragmentation into J/psi and for semileptonic B-c(+/-) decays, yielding branching ratio upper limits of B(Z(0) --> J/psi q (q) over bar X) < 4.1 x 10(-4) and B(Z(0) --> B-c(+/-) X).B(B-c(+/-) --> J/psi l(+/-)nu(l)) < 5.0 x 10(-5) (Q) 90% CL, respectively. We found the first evidence for radially excited B mesons, by observing a signal in the B(*)pi(+) pi(-) final state at Q = m(B(*)pi(+) pi(-)) - m(B(*)) - 2m(pi) = 301 +/- 4 +/- 10 MeV.