NK Watson

Publications (40)45.97 Total impact

• Source

  Available from: Fulvio Galeazzi

  Article: Measurement of branching fractions for exclusive B decays to charmonium final states

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmerspeig-Toeller, SL Wu, Z Yu, H Zobernig, TMB Kordich, H Neal
  [show abstract] [hide abstract]
  ABSTRACT: We report branching fraction measurements for exclusive decays of charged and neutral B mesons into two-body final states containing a charmonium meson. We use a sample of 22.72±0.36 million BB̅ events collected between October 1999 and October 2000 with the BABAR detector at the PEP-II storage rings at the Stanford Linear Accelerator Center. The charmonium mesons considered here are J/ψ, ψ(2S), and χc1, and the light meson in the decay is either a K, K*, or π0.
  Physical Review D 02/2013; 65. · 4.56 Impact Factor
• Article: Measurement of the B-0 and B+ meson lifetimes with fully reconstructed hadronic final states

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, TMB Kordich, H Neal
  [show abstract] [hide abstract]
  ABSTRACT: The B0 and B+ meson lifetimes have been measured in e+e- annihilation data collected in 1999 and 2000 with the BABAR detector at center-of-mass energies near the ϒ(4S) resonance. Events are selected in which one B meson is fully reconstructed in a hadronic final state while the second B meson is reconstructed inclusively. A combined fit to the B0 and the B+ decay time difference distributions yields τB0 = 1.546±0.032(stat)±0.022(syst) ps, τB+ = 1.673±0.032(stat)±0.023(syst) ps, and τB+/τB0 = 1.082±0.026(stat)±0.012(syst).
  Physical Review Letters 02/2013; 87(20). · 7.37 Impact Factor
• Article: Search for the decay B0→γγ

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, TMB Kordich, H Neal, BABAR Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: We report the result of a search for the rare decay B0→γγ in 426  fb-1 of data, corresponding to 226×106 B0B̅ 0 pairs, collected on the Υ(4S) resonance at the PEP-II asymmetric-energy e+e- collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 21-12+13 signal events with a statistical significance of 1.8σ. This corresponds to a branching fraction B(B0→γγ)=(1.7±1.1(stat.)±0.2(syst.))×10-7. Based on this result, we set a 90% confidence level upper limit of B(B0→γγ)<3.2×10-7.
  Physical Review D. 01/2011; 83:11.
• Article: Measurement of the CP asymmetry amplitude sin2 beta with B-0 mesons

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Zghiche, A Palano, [......], Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, J Wu, SL Wu, Z Yu, H Neal, BABAR Collaboration
  Physical Review Letters 01/2002; 89. · 7.37 Impact Factor
• Article: Measurement of the CP asymmetry amplitude sin2 beta with B-0 mesons

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Zghiche, A Palano, [......], Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, J Wu, SL Wu, Z Yu, H Neal, BABAR Collaboration
  Physical Review Letters 01/2002; 89. · 7.37 Impact Factor
• Article: Measurement of the branching fractions for ψ(2S)→e+e- and ψ(2S)→μ+μ-

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, A Pompili, [......], Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, TMB Kordich, H Neal, BABAR Collaboration
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  ABSTRACT: We measure the branching fractions of the ψ(2S) meson to the leptonic final states e+e- and μ+μ- relative to that for ψ(2S)→J/ψπ+π-. The method uses ψ(2S) mesons produced in the decay of B mesons at the Υ(4S) resonance in a data sample collected with the BABAR detector at the Stanford Linear Accelerator Center. Using previous measurements for the ψ(2S)→J/ψπ+π- branching fraction, we determine the e+e-and μ+μ- branching fractions to be 0.0078±0.0009±0.0008 and 0.0067±0.0008±0.0007, respectively.
  Physical Review D 01/2001; 65. · 4.56 Impact Factor
• Article: Search for the decay B-0 ->gamma gamma

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, TMB Kordich, H Neal, BABAR Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: We present a limit on the branching fraction for the decay B0→γγ using data collected at the ϒ(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e- collider. Based on the observation of one event in the signal region, out of a sample of 21.3×106 e+e-→ϒ(4S)→BB̅ decays, we establish an upper limit on the branching fraction of B(B0→γγ)<1.7×10-6 at the 90% confidence level. This result substantially improves upon existing limits.
  Physical Review Letters 01/2001; 87. · 7.37 Impact Factor
• Article: Measurement of the decays B ->phi K and B ->phi K*

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], W Orejudos, Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, BABAR Collaboration
  [show abstract] [hide abstract]
  ABSTRACT: We have observed the decays B→φK and φK* in a sample of over 45 million B mesons collected with the BABAR detector at the PEP-II collider. The measured branching fractions are B(B+→φK+) = (7.7-1.4+1.6±0.8)×10-6, B(B0→φK0) = (8.1-2.5+3.1±0.8)×10-6, B(B+→φK*+) = (9.7-3.4+4.2±1.7)×10-6, and B(B0→φK*0) = (8.7-2.1+2.5±1.1)×10-6. We also report the upper limit B(B+→φπ+)<1.4×10-6 ( 90% C.L.).
  Physical Review Letters 01/2001; 87:7. · 7.37 Impact Factor
• Source

  Available from: Vasily Morgunov

  Article: Construction and commissioning of the CALICE analog hadron calorimeter prototype

  C. Adloff, Y Karyotakis, J Repond, A Brandt, H Brown, K De, C. Medina, J Smith, J Li, M Sosebee, [......], I Kim, T Lee, J Park, J Sung, S Itoh, K. Kotera, M Nishiyama, T Takeshita, S. Weber, C Zeitnitz
• Article: Measurement of D-s(+) and D-s(*+) production in B meson decays and from continuum e(+)e(-) annihilation at root s=10.6 GeV

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, A Pompili, [......], R Liu, Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, TMB Kordich, H Neal
  Michael Williams.
• Article: The BABAR detector

  B Aubert, A Bazan, A Boucham, D Boutigny, I De Bonis, J Favier, JM Gaillard, A Jeremie, Y Karyotakis, T Le Flour, [......], W Orejudos, Y Pan, R Prepost, IJ Scott, J Walsh, SL Wu, Z Yu, H Zobernig, TB Moore, H Neal
  Michael Williams.
• Source

  Available from: rl.ac.uk

  Article: A MAPS-based readout for a Tera-Pixel electromagnetic calorimeter at the ILC

  JA Ballin, JP Crooks, PD Dauncey, B Levin, M Lynch, A Magnan, Y Mikami, O. Miller, M. Noy, V. Rajovic, M Stanitzki, KD Stefanov, R Turchetta, M Tyndel, EG Villani, NK Watson, JA Wilson
• Source

  Available from: Paolo Laurelli

  Article: Search for neutral MSSM Higgs bosons at LEP

  S Schael, R Barate, R Bruneliere, I De Bonis, D Decamp, C Goy, S Jezequel, JP Lees, F Martin, E Merle, [......], L Zivkovic, S. Heinemeyer, A. Pilaftsis, G. Weiglein, LEP Collaboration, ALEPH Collaboration, DELPHI Collaboration, L3 Collaboration, OPAL Collaboration, LEP Working Grp Higgs Boson Search
• Article: Precision electroweak measurements on the Z resonance

  S Schael, R Barate, R Bruneliere, D Buskulic, I De Bonis, D Decamp, P Ghez, C Goy, S Jezequel, JP Lees, [......], RK Yamamoto, XQ Yang, J Yashima, SJ Yellin, CC Young, H Yuta, G Zapalac, RW Zdarko, C Zeitlin, J Zhou
  Michael Williams.
• Article: Study of CP-violating asymmetries in B-0 ->pi(+) pi(-), K+ pi(-) decays

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, A Pompili, [......], R Liu, Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, TMB Kordich, H Neal
  Michael Williams.
• Article: Measurement of branching fractions and search for CP-violating charge asymmetries in charmless two-body B decays into pions and kaons

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, TMB Kordich, H Neal
  Michael Williams.
• Article: Measurements of the branching fractions of exclusive charmless B meson decays with eta ' or omega mesons

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, TMB Kordich, H Neal
  Michael Williams.
• Article: Measurement of CP-violating asymmetries in B-0 decays to CP eigenstates

  B Aubert, D Boutigny, I De Bonis, JM Gaillard, K Jeremie, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, [......], Y Pan, R Prepost, IJ Scott, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, TMB Kordich, TB Moore, H Neal
  Michael Williams.
• Article: Measurement of the decays B ->phi K and B ->phi K - 151801

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], J Nielsen, W Orejudos, Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig
  Michael Williams.
• Article: Measurement of B -> K-* gamma branching fractions and charge asymmetries

  B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, [......], Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, TMB Kordich, H Neal
  Michael Williams.