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Publication - Dr Paras Naik

    Studies of the decays D-0 -> (KSK-)-K-0 pi(+) and D-0 -> (KSK+)-K-0 pi(-)

    Citation

    Naik, P, Rademacker, J, Insler, J, Muramatsu, H, Park, CS, Pearson, LJ, Thorndike, EH, Ricciardi, S, Thomas, C, Artuso, M, Blusk, S, Mountain, R, Skwarnicki, T, Stone, S, Wang, JC, Zhang, LM, Bonvicini, G, Cinabro, D, Smith, MJ, Zhou, P, Gershon, T, Edwards, KW, Randrianarivony, K, Briere, RA, Vogel, H, Onyisi, PUE, Rosner, JL, Alexander, JP, Cassel, DG, Das, S, Ehrlich, R, Gibbons, L, Gray, SW, Hartill, DL, Kreinick, DL, Kuznetsov, VE, Patterson, JR, Peterson, D, Riley, D, Ryd, A & others 2012, ‘Studies of the decays D-0 -> (KSK-)-K-0 pi(+) and D-0 -> (KSK+)-K-0 pi(-)’. Physical Review D: Particles, Fields, Gravitation and Cosmology, vol 85., pp. -

    Abstract

    The first measurements of the coherence factor R-KS pi(0) and the average strong-phase difference delta(K0K pi)(DS) in D-0 -> (KSK -/+)-K-0 pi(+/-) decays are reported. These parameters can be used to improve the determination of the unitary triangle angle gamma in B- -> (D) over tildeK(-) decays, where (D) over tilde is either a D-0 or a (D) over bar (0) meson decaying to the same final state, and also in studies of charm mixing. The measurements of the coherence factor and strong-phase difference are made using quantum-correlated, fully reconstructed D-0(D) over bar (0) pairs produced in e(+)e(-) collisions at the psi (3770) resonance. The measured values are R-KAK pi(0) = 0.73 +/- 0: 08 and delta(DSKK)-K-0 pi = (8.3 +/- 15.2)degrees for an unrestricted kinematic region and R-K*K = 1.00 +/- 0.16 and delta(K*K)(D) = (26.5 +/- 15.8)degrees for a region where the combined K-S(0) pi(-/+) invariant mass is within 100 MeV/c(2) of the K*(892)(-/+) mass. These results indicate a significant level of coherence in the decay. In addition, isobar models are presented for the two decays, which show the dominance of the K*(892)(+/-) resonance. The branching ratio B(D-0 -> (KSK+)-K-0)/B(D-0 -> K-S(0) K- pi(+)) is determined to be 0.592 +/- 0.044(stat) +/- 0.018(syst) which is more precise than previous measurements.

    Full details in the University publications repository