x / 02 02 03 1 v 1 1 4 Fe b 20 02 SLAC – PUB – 9087 February 2002 Measurement of the b - Quark Fragmentation Function
ثبت نشده
چکیده
We present a measurement of the b-quark inclusive fragmentation function in Z 0 decays using a novel kinematic B-hadron energy reconstruction technique. The measurement was performed using 350,000 hadronic Z 0 events recorded in the SLD experiment at SLAC between 1997 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct B-decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used in this technique. We measured the B energy with good efficiency and resolution over the full kinematic range. We compared the scaled B-hadron energy distribution with models of b-quark fragmentation and with several ad hoc functional forms. A number of models and functions are excluded by the data. The average scaled energy of weakly-decaying B hadrons was measured to be < x b > = 0.709 ± 0.003 (stat) ± 0.003 (syst) ± 0.002 (model).
منابع مشابه
ar X iv : h ep - p h / 02 02 20 7 v 1 2 1 Fe b 20 02 UW / PT - 02 - 03 Snowmass 2001 : Jet Energy Flow Project ∗
Snowmass 2001: Jet Energy Flow Project C.F. Berger, E.L. Berger, P.C. Bhat, J.M. Butterworth, S.D. Ellis, B. Flaugher, W.T. Giele, W. Kilgore, A. Kulesza, S. Lammers, S. Magill, and H. Prosper State University of New York, Stony Brook Argonne National Laboratory Fermi National Accelerator Laboratory University College London University of Washington Brookhaven National Laboratory University of ...
متن کاملar X iv : h ep - p h / 02 02 09 8 v 1 1 1 Fe b 20 02 COLOR - FLAVOR ( UN - ) LOCKING
The structure of the phase diagram of strongly interacting matter at moderate densities is calculated within a 3-flavor NJL-type quark model with realistic quark masses. We focus on the influence of the selfcon-sistently determined effective strange quark mass on the color-flavor unlocking phase transition.
متن کاملar X iv : h ep - e x / 02 02 02 3 v 1 1 1 Fe b 20 02 RESULTS FROM HIGH ENERGY ACCELERATORS
We review some of the recent experimental results obtained at high-energy colliders with emphasis on LEP and SLC results.
متن کاملar X iv : m at h / 02 02 11 4 v 1 [ m at h . G N ] 1 2 Fe b 20 02 ON FINITE - DIMENSIONAL MAPS II
Let f : X → Y be a perfect n-dimensional surjective map of paracompact spaces and Y a C-space. We consider the following property of continuous maps g : X → Ik = [0, 1], where 1 ≤ k ≤ ω: each g(f(y)), y ∈ Y , is at most n-dimensional. It is shown that all maps g ∈ C(X, In+1) with the above property form a dense Gδ-set in the function space C(X, I n+1 ) equipped with the source limitation topolo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002