83 research outputs found
"Could Charm (\& ) Transitions be the `Poor Princesses' of Deeper Understanding of Fundamental Dynamics?" -- or -- "Finding Novel Forces?"
We know that `our' Universe consists of `known' matter only 4.5\%: our
understanding is incomplete seeing directly in neutrino oscillations (never
mind about `other' Universes). Charm quarks had great impact on our
understanding of known matter. QCD is the only local quantum field theory to
describe strong forces. We can learn novel lessons about strong dynamics by
measuring rates around the thresholds of states with .
Furthermore they give us gateways for New Dynamics (ND), where we have to go
from `accuracy' to `precision' eras. Finally we can connect with
transitions and -- maybe -- with dark matter. Charm dynamics acts as a bridge
between the worlds of light flavor hadrons with the heavy one, namely beauty
hadrons. Finding {\em regional asymmetries} in many-body final states could be
a `game changer'. There are several different `roads' to get closer to our
goals: experiments act as gatekeepers like Super-tau-charm-factories,
Super-beauty-factories and/or Super--factories -- and deeper thinking
about symmetries.Comment: 46 pages, 7 figures, 1 table; Dedicated to Timothy O'Meara, a
mathematician \& the first lay Provost of the University of Notre Dame du
Lac: without him \& his vision the University of Notre Dame du Lac would not
be even close what it is now; e.g., he opened Notre Dame's academic and
cultural door to China.
Parton--Hadron Duality in B Meson Decays
We summarize the current view on Parton-Hadron duality as it applies to B
meson decays. It is emphasized that an OPE treatment is essential for properly
formulating duality and its limitations. Duality violations are unlikely to
become the limiting factor in describing semileptonic B width vis-a-vie higher
order corrections. The consistent extraction of the b quark mass from B
production and decays provides a striking example of the theoretical control
achieved.Comment: Contribution to the CKM workshop, held at CERN, Geneva,
Feb.15.-18.2002, LaTeX, 13 pages, 2 figure
B_s Mixing and B Hadron Lifetimes at CDF
We present the CDF results using 1.0 fb^{-1} of data on the mixing frequency
measurement in the B_s system and the lifetime measurements of several B
hadrons. We obtain \Delta m_s=17.77 +- 0.1 +- 0.07 ps^{-1} and
c\tau(\Lambda_b)=473.8 +- 23.1 +- 3.5 \mu m. The later one is more than 3 sigma
above the world average, but in reasonable agreement with HQE calculations.Comment: submitted to EPS2007 proceeding
eta - eta prime Mixing -From electromagnetic transitions to weak decays of charm and beauty hadrons
It has been realized for a long time that knowing the eta and eta^prime wave
functions in terms of quark and gluon components probes our understanding of
non-perturbative QCD dynamics. Great effort has been given to this challenge --
yet no clear picture has emerged even with the most recent KLOE data. We point
out which measurements would be most helpful in arriving at a more definite
conclusion. A better knowledge of these wave functions will significantly help
to disentangle the weight of different decay subprocesses in semi-leptonic
decays of D+, Ds^+ and B+ mesons. The resulting insights will be instrumental
in treating even non-leptonic B transitions involving eta and eta^prime and
their CP asymmetries; thus they can sharpen the case for or against New Physics
intervening there.Comment: 22 pages, 4 figures; it matches published versio
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