Thesis

Browse

Now showing 1 - 1 of 1

Open Access
Study of inclusive production of charmonium mesons in B decays
(Punjab Agricultural University, 2013) Nitika Goyal; rajeev kumar
Charmonium is a heavy meson containing a charm and anti-charm quark. Studies of charmonium production has improved our understanding of heavy quark production and formulation of bound states of quark pairs. Prompt charmonium production provides an interesting environment to study the interplay between perturbative QCD and non-perturbative effects. Non-relativistic QCD (NRQCD) provides a consistent calculational framework for direct heavy quarkonium production. The inclusive production of charmonium meson is studied using a data sample corresponding to 386 million events which has been collected at upsilon (4S) resonance (bound state of quarks) with the Belle detector at the KEKB asymmetric energy collider. Events are required to pass through tight event selection criteria. candidates are reconstructed using the leptonic decays . A large Monte Carlo sample has been used to determine signal reconstruction efficiency and parametrization of background. The measured branching fraction for inclusive B= (1.10 0.005) % and B)X = (1.09 %. The feeddown contribution from ( and B X has been taken into account and corrected branching fraction is (0.77 %.