Quark-hadron-duality in the charmonium and upsilon system
نویسنده
چکیده
In this work we discuss the practical and conceptual issues related to quark-hadron-duality in heavy-heavy systems. Recent measurements in the charmonium region allow a direct test of quark-hadronduality. We present a formula for non-resonant background production in e+e− → DD and extract the resonance parameters of the ψ(3S) − ψ(6S). The obtained results are used to investigate the upsilon energy range.
منابع مشابه
Penguins with Charm and Quark-Hadron Duality
The integrated branching fraction of the process B → Xs l+l− is dominated by resonance background from narrow charmonium states, such as B → Xsψ → Xs l +l−, which exceeds the non-resonant charm-loop contribution by two orders of magnitude. The origin of this fact is discussed in view of the general expectation of quark-hadron duality. The situation in B → Xs l+l− is contrasted with charmpenguin...
متن کاملFlavor ordering of elliptic flows at high transverse momentum.
Based on the quark coalescence model for the parton-to-hadron phase transition in relativistic heavy ion collisions, we relate the elliptic flow (upsilon(2)) of high p(T) hadrons to that of high p(T) quarks. For high p(T) hadrons produced from an isospin-symmetric and quark-antiquark-symmetric partonic matter, magnitudes of their elliptic flows follow a flavor ordering as (upsilon(2,pi)=upsilon...
متن کاملHow quark hadron duality in QCD may work
We pursue the issue of the local quark-hadron duality at high energies in twoand four-dimensional QCD. A mechanism of the dynamical realization of the quark-hadron duality in two-dimensional QCD in the limit of large number of colors, Nc → ∞, (the ’ t Hooft model) is investigated. We argue that a similar mechanism of dynamical smearing may be relevant in four-dimensional QCD. Although particula...
متن کاملCharmonium and open charm production in nuclear collisions at SPS/FAIR energies and the possible influence of a hot hadronic medium
We provide predictions for charmonium and open charm production in nuclear collisions at SPS/FAIR energies within the framework of the statistical hadronization model. The increasing importance at lower energies of Λc production is demonstrated and provides a challenge for future experiments. We also demonstrate that, because of the large charm quark mass and the different timescales for charm ...
متن کاملAn Illustrative Example of How Quark-Hadron Duality Might Work
We discuss the issue of the local quark-hadron duality at high energies in twoand four-dimensional QCD. A mechanism of the dynamical realization of the quark-hadron duality in two-dimensional QCD in the limit of large number of colors, Nc → ∞, (the ’t Hooft model) is considered. A similar mechanism of dynamical smearing may be relevant in four-dimensional QCD. Although particular details of our...
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