Abstract
We point out the physics opportunities of future high-luminosity B-factories
at the Upsilon(5S) resonance and above. In this paper we discuss numerous
interesting investigations, which can be performed in the e+e- centre-of-mass
energy region from the Upsilon(5S) and up to 11.5 GeV, where an efficient data
taking operation should be possible with the planned B-factories. These studies
include abundant Bs production and decay properties; independent confirmation
and if found, exhaustive exploration of Belle's claimed charged bottomonia;
clarification of puzzles of interquarkonium dipion transitions; extraction of
the light quark mass ratio from hadronic Upsilon(5S) decays; analysis of
quarkonium and exotic internal structure from open flavour decays, leading to
severe SU(3) symmetry violations; clarification of whether a hybrid state has
similar mass to the Upsilon(5S) bottomonium, making it a double state; searches
for molecular/tetraquark states that should be more stable with heavy quarks;
completion of the table of positive-parity B\_J mesons and study of their basic
properties; production of Lambda\_bLambda\_b heavy baryon pairs, that,
following weak decay, open vistas on the charmed baryon spectrum and new
channels to study CP violation; confirmation or refutation of the deviation
from pQCD of the pion transition form factor, by extending the Q^2 reach of
current analysis; and possibly reaching the threshold for the production of
triply-charmed baryons. If, in addition, the future colliders can be later
upgraded to 12.5 GeV, then the possibility of copious production of
B\_cB\_c pairs opens, entailing new studies of CP violation and improved,
independent tests of the CKM picture (through determination of V\_bc), and of
effective theories for heavy quarks.
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