JP Alexander

Publications (12)14.74 Total impact

• Article: First Measurement of Γ (D^{*+})

  MS Alam, SB Athar, L Jian, L Ling, M Saleem, S Timm, F Wappler, A Anastassov, E Eckhart, KK Gan, [......], MA Marsh, C Plager, C Sedlack, M Selen, JJ Thaler, J Williams, KW Edwards, AJ Sadoff, R Ammar, A Bean
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  ABSTRACT: We present the first measurement of the D 1 width using 9fb of e1e2 data collected near the Y4S resonance by the CLEO II. V detector. Our method uses advanced tracking techniques and a reconstruction method that takes advantage of the small vertical size of the Cornell Electron-positron Storage Ring beam spot to measure the energy release distribution from the D 1! D0p1 decay.
  Physical Review Letters 11/2001; 87(25):251801. · 7.37 Impact Factor
• Article: Observation of B→ φK and B→ φK^{*}

  RA Briere, GP Chen, T Ferguson, H Vogel, A Gritsan, JP Alexander, R Baker, C Bebek, BE Berger, K Berkelman, [......], A Wolf, J Wu, S Kopp, M Kostin, AH Mahmood, SE Csorna, I Danko, KW McLean, Z Xu, R Godang
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  ABSTRACT: We have studied two-body charmless hadronic decays of B mesons into the final states fK and fK. Using 9.7 million BB pairs collected with the CLEO II detector, we observe the decays B2! fK2 and B0! fK 0 with the following branching fractions: B (B2! fK2)(5.512. 1 21.8 6 0.6) 3 1026 and B (B0! fK 0)(11.514. 511.8 23.721. 7) 3 1026. We also see evidence for the decays B0! fK0 and B2! fK 2. However, since the statistical significance is not overwhelming for these modes, we determine upper limits of, 12.3 3 1026 and, 22.5 3 ...
  Physical Review Letters 04/2001; 86(17):3718-3721. · 7.37 Impact Factor
• Article: Evidence of new states decaying into Xi*(c)pi

  Alice Bean, A Smith, E Eckhart, A Gritsan, DL Kreinick, R. Ehrlich, D Riley, Raymond G Ammar, A Wolf, C Prescott, [......], BE Berger, B Valant-Spaight, R Wilson, G. Majumder, T Ferguson, EH Thorndike, TE Coan, R. Mountain, HP Paar, PI Hopman
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  ABSTRACT: Using 13.7 fb(-1) of data recorded by the CLEO detector at Cornell Electron Storage Ring, we report evidence of two new charmed baryons: one decaying into Xi (0 ')(c)pi (+) with the subsequent decay Xi (0)(c)' --> Xi (0)(c)gamma, and its isospin partner decaying into Xi (+)(c)' pi (-) followed by Xi (+)(c)' --> Xi (+)(c)gamma. We measure the following mass differences for the two states: M(Xi (0)(c)gamma pi (+)) - M(Xi (0)(c)) = 318.2 +/- 1.3 +/- 2.9 MeV and M(Xi (+)(c)gamma pi (-)) - M(Xi (+)(c)) = 324.0 +/- 1.3 +/- 3.0 MeV. We interpret these new states as the J(P) = 1/2(-) Xi (c1) particles, the charmed-strange analogs of the Lambda (+)(c1)(2593).
• Article: Search for the decay Y(1S) - gamma eta '

  SJ Richichi, H Severini, P Skubic, SA Dytman, V. Savinov, S Chen, JW Hinson, J Lee, DH Miller, EI Shibata, [......], C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, TK Pedlar, JB Thayer, E Von Toerne, MM Zoeller
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  ABSTRACT: We report on a search for the radiative decay Y(1S) --> gamma eta' in 61.3 pb(-1) of data taken with the CLEO II detector at the Cornell Electron Storage Ring. Three decay chains were investigated, all involving eta' --> pi (+) pi (-) eta, followed by eta --> gamma gamma, eta --> pi (0)pi (0)pi (0), or eta --> pi (+) pi (-) pi (0). We find no candidate events in any of the three cases and set a combined upper limit of 1.6 X 10(-5) at 90% C.L., significantly smaller than the previous limit. We compare our result to other radiative Y decays, to radiative J/psi decays, and to theoretical predictions.
• Source

  Available from: arxiv.org

  Article: Analysis of D+ -> K- pi(+)e(+)nu(e) and D+ -> K- pi(+)mu(+)nu(mu) semileptonic decays

  RA Briere, H Vogel, PUE Onyisi, JL Rosner, JP Alexander, DG Cassel, S Das, R. Ehrlich, L. Fields, L. Gibbons, [......], J Zhu, P. Naik, J Rademacker, DM Asner, KW Edwards, J. Reed, K. Randrianarivony, AN Robichaud, G. Tatishvili, EJ White
• Source

  Available from: arxiv.org

  Article: Measurement of absolute branching fractions of inclusive semileptonic decays of charm and charmed-strange mesons

  DM Asner, KW Edwards, J. Reed, AN Robichaud, G. Tatishvili, EJ White, RA Briere, H Vogel, PUE Onyisi, JL Rosner, [......], LM Zhang, G Bonvicini, D Cinabro, A. Lincoln, MJ Smith, P Zhou, J Zhu, P. Naik, J Rademacker, CLEO Collaboration
• Article: Measurements of branching fractions for electromagnetic transitions involving the chi(bJ)(1P) states

  M. Kornicer, RE Mitchell, CM Tarbert, D. Besson, TK Pedlar, D. Cronin-Hennessy, J. Hietala, P. Zweber, S. Dobbs, Z. Metreveli, [......], AJ Sadoff, X Shi, WM Sun, J Yelton, P Rubin, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, J Libby
• Source

  Available from: purdue.edu

  Article: Search for the decay J/psi -> gamma plus invisible

  CLEO Collaboration, J. Insler, H Muramatsu, CS Park, EH Thorndike, F Yang, S Ricciardi, C Thomas, M. Artuso, S. Blusk, [......], H. Mendez, JY Ge, DH Miller, IPJ Shipsey, B. Xin, GS Adams, D Hu, B. Moziak, J. Napolitano, KM Ecklund
• Article: Measurement of the pseudoscalar decay constant f(Ds) using D-s(+)->tau(+)nu, tau(+)->rho(+)nu decays

  CLEO Collaboration, P. Naik, J Rademacker, DM Asner, KW Edwards, K. Randrianarivony, J. Reed, AN Robichaud, G. Tatishvili, EJ White, [......], T. Skwarnicki, S Stone, JC Wang, LM Zhang, G Bonvicini, D Cinabro, A. Lincoln, MJ Smith, P Zhou, J Zhu
• Article: Gamma(1S) -> gamma f(2)'(1525); f(2)'(1525) -> (KSKS0)-K-0 decays

  CLEO Collaboration, D. Besson, DP Hogan, TK Pedlar, D. Cronin-Hennessy, J. Hietala, P. Zweber, S. Dobbs, Z. Metreveli, KK Seth, [......], J Yelton, P Rubin, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, J Libby, M. Kornicer, RE Mitchell, CM Tarbert
• Article: Study of psi(2S) decays to gamma p(p)over-bar, pi(0) p(p)over-bar, and eta p(p)over-bar, and search for p(p)over-bar threshold enhancements

  BABAR Collaboration, JP Alexander, DG Cassel, S Das, R. Ehrlich, L. Fields, L. Gibbons, SW Gray, DL Hartill, BK Heltsley, [......], P. Naik, J Rademacker, DM Asner, KW Edwards, K. Randrianarivony, G. Tatishvili, RA Briere, H Vogel, PUE Onyisi, JL Rosner
• Article: Branching fractions for chi(cJ) -> p(p)over-bar pi(0), p(p)over-bar eta, and p(p)over-bar omega

  CLEO Collaboration, PUE Onyisi, JL Rosner, JP Alexander, DG Cassel, S Das, R. Ehrlich, L. Fields, L. Gibbons, SW Gray, [......], J Rademacker, DM Asner, KW Edwards, J. Reed, K. Randrianarivony, AN Robichaud, G. Tatishvili, EJ White, RA Briere, H Vogel