A study of B meson decays involving a J/[psi] meson by George Sganos; Pekka Sinervo (supervisor) PDF

By George Sganos; Pekka Sinervo (supervisor)

ISBN-10: 0612190331

ISBN-13: 9780612190337

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A search for additional DCH hits that may belong to a track is performed, and additional track-finding algorithms employed to identify tracks which do not 34 CHAPTER 2. THE BABAR DETECTOR AND DATA traverse the entire DCH or do not originate from the interaction point. Tracks found by this algorithm are refit using a Kalman filter, which accounts for local variations in material and magnetic field along the fitting trajectory. They are extrapolated back into the SVT, where SVT track segments are added.

The patterns of energy deposition and arrival time in the φ-sectors are used to form a set of trigger primitives. The DCT and EMT inputs are processed by a global trigger (GLT) to form specific L1 triggers. Processing times for the DCT and EMT both are about 5 µs with an additional 4 µs for the GLT to process and initiate readout by the ROMs. The combined L1 triggers achieve nearly 100% efficiency for generic BB events. 2 The Level 3 Trigger The Level 3 trigger (L3) involves a basic reconstruction of the event in both the DCH and EMC.

5: a current-produced baryon-pair (J ) part together with a B recoil meson transition part, B|J |K p¯ p (eg. 4(c)), and a B-to-baryon-transition (T ) part together with a current 3 W + -exchange diagram is valid for neutral B decay, while W + -annihilation for the charged B decay. 20 CHAPTER 1. 5: Summary of the experimental and theoretical values for the branching fractions (×10−6 ) of B → p¯ ph. 0 K (eg. 4(b)). A factorization ap- proach is generally used in the literature for the evaluation of the current-produced amplitude [122, 28].

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A study of B meson decays involving a J/[psi] meson by George Sganos; Pekka Sinervo (supervisor)


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