K. Hartman

Publications (3)0 Total impact

• Source

  Available from: arxiv.org

  Article: A straw drift chamber spectrometer for studies of rare kaon decays

  K. Lang, D. Ambrose, C. Arroyo, M. Bachman, D. Connor, M. Eckhause, K.M. Ecklund, S. Graessle, M. Hamela, S. Hamilton, [......], M. Pommot-Maia, M. Proga, P.J. Riley, J.L. Ritchie, P.D. Rubin, V.I. Vassilakopoulos, B. Ware, R.E. Welsh, S.G. Wojcicki, S. Worm
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  ABSTRACT: We describe the design, construction, readout, tests, and performance of planar drift chambers, based on 5-mm-diameter copperized Mylar and Kapton straws, used in an experimental search for rare kaon decays. The experiment took place in the high-intensity neutral beam at the Alternating Gradient Synchrotron of Brookhaven National Laboratory, using a neutral beam stop, two analyzing dipoles, and redundant particle identification to remove backgrounds.
  Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 08/2003;
• Source

  Available from: arxiv.org

  Article: First Observation of the Rare Decay Mode K-long -> e+ e-

  BNL E871 Collaboration: D. Ambrose, C Arroyo, M. Bachman, P. de Cecco, D. Connor, M Eckhause, K. M. Ecklund, S. Graessle, A. D. Hancock, K. Hartman, [......], M. Pommot-Maia, P. J. Riley, J. L. Ritchie, P D Rubin, V.I. Vassilakopoulos, C. B. Ware, R. E. Welsh, S. G. Wojcicki, E Wolin, S Worm
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  ABSTRACT: In an experiment designed to search for and study very rare two-body decay modes of the K-long, we have observed four examples of the decay K-long -> e+ e-, where the expected background is 0.17+-0.10 events. This observation translates into a branching fraction of 8.7^{+5.7}_{-4.1} X 10^{-12}, consistent with recent theoretical predictions. This result represents by far the smallest branching fraction yet measured in particle physics.
  11/1998;
• Article: A straw tracking system to study rare KL decays

  S Graessle, M Hamela, S Hamilton, K Lang, M.R Marcin, V Vassilakopoulos, K Ecklund, K Hartman, M Hebert, D.A Ouimette, S.G Wojcicki
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  ABSTRACT: Construction, readout, tests, and performance of planar drift chambers, based on 5-mm diameter copperized Mylar straws, used in experiment E871 at BNL is briefly described and discussed.
  Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.