SuperB: a Linear High-Luminosity B Factory Page: 4 of 23
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7 qs\ 0 i
FIG. 2: BABAR and Belle detectors
-1 -9.5 a 9.5 1 1.5 2
IT. sin( (3*')
-1 -0.5 1
1 0.5 1
FIG. 3: p, i plane using all the available constraints (left) and only the information from the UT angles (right).
Figure 6), must be interpreted anyway "cum grano salis".
There are in fact other contributions to be taken into account
in addition to the diagrams with top quark insertion in the
For example, even in the case the theoretically cleanest
channels (B0 -* #K0 and B0 -* KSKS KS ), one has to take
into account a Standard Model uncertainty due to a penguin
contribution with an up quark running in the loop. Using the
CKM couplings to scale this term to the leading contribu-
tion, we obtain a correction of the order of 12 ~ 5% com-
ing from the fact that these contributions are doubly Cabibbo
suppressed. For the other decay channels the uncertainty
could be as large as 10% (or even more), since in that case
the doubly Cabibbo suppressed terms also include tree-level
Once these contributions are taken into account, one can
use the experimental results for the S parameters to obtain
a bound on NP parameters . For example, one can use
the knowledge of b -* sy and b -* sll Branching Ratios
in SUSY models to bound the values of NP parameters and
study their effect on the b -* s penguin modes . This
is done in figure (7), where the case of a RL mass insertion
_' a reO
- . -
y i too
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Albert, J.; Bettarini, S.; Biagini, M.; Bonneaud, G.; Cai, Y.; Calderini, G. et al. SuperB: a Linear High-Luminosity B Factory, report, February 8, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc874999/m1/4/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.