on Tau-Charm Physics
Links: | IHEP |
BES | Workshop on PRC-US Cooperation in High Energy Physics June
Hadron spectroscopy and Charm physics are becoming more exciting, this revival interesting has been driven by experimental reports of the narrow DsJ states, X(3872), X(3940), Y(3940) and the newest unexpected Y(4260) from B factories and other related experiments, the proton-antiproton threshold enhancement and X(1835) observed at BESII also attracted people's attention. In the meanwhile, MIMD Lattice Calculation (MILC) and High Precision QCD (HPQCD) collaborations predicted fD+=201¡À3¡À17MeV, CLEO-c collaboration also reported the result fD+= 223¡À16¡À8 MeV. The two results agree well within the errors of about 8% for each. It will challenge the theoretical prediction and provide important tests of the predictive powers of lattice QCD.
BESIII at BEPCII under construction in
Beijing can accumulate 10¡Á109 J/¦×, 3¡Á109¦×(2S) , 30
million DD or 2 million Ds+Ds-pairs per running year, respectively,
when it is turned to run at resonances in 2007. Coupled with
what is available at CLEO-c, BESIII will make it possible
for the first time to study in detail the light hadron
spectroscopy in the decays of charmonium states and the
charmed mesons. In addition, about 90 DD million pairs will be collected at BESIII in three years at ¦×(3770) peak.Many high precision measurements,including CKM matrix elements related to Charm weak decays,decay
constants fD+ (fDs),
Dalitz decays of D meson and absolute decay branching
fraction and so on, will be achieved.
BESIII analyses are likely to be essential in deciding if some intriguing
signals in particular in D decays are actually due to New Physics or not.
With modern techniques and unprecedented high statistical data sample,
Searching for rare D, Charmonium and tau decays will be possible, such as
lepton number and flavor violated decays, invisible decays. The study of tau-
Charm physics could reveal or indicate the possible presence of New Physics
in the low energy region.
The workshop will give detail discussions
on tau-Charm physics in the next few years, both theoretical
and experimental studies will be covered. Extensive review
of the more recent theoretical developments and experimental
techniques will be presented. Some intense discussions on
the following physics topics will be especially addressed:
possible innovation on Partial Wave Analysis (PWA),
theoretical and experimental techniques on Dalitz plot
analysis in D decays, analysis tools to extract the absolute
branching fraction, decay constants, form factors, CP
parameters and parameters in D0-D0 Oscillations. The motivation of
tau lepton physics near the threshold will be also studied
so that a plan can be made at BESIII.
@2005-2006 International Conference. All Rights Reserved.