13,549 research outputs found
Branching fractions and direct CP asymmetries of charmless decay modes at the Tevatron
We present new CDF results on the branching fractions and time-integrated
direct CP asymmetries for and decay modes into pairs of
charmless charged hadrons (pion or kaon). The data set for this update amounts
to 1 fb of collisions at . We report
the first observation of the mode and a
measurement of its branching fraction and direct CP asymmetry. We also observe
for the first time two charmless decays of -baryon: and .Comment: Proceedings for Beauty 2006, Sept. 25-29 at Oxford University, to be
published in Nucl. Phys. (Proc. Suppl.). FERMILAB-CONF-06-471-E. Dec 2006.
6p
Updated measurements of hadronic B decays at CDF
The CDF experiment at the Tevatron collider established that
extensive and detailed exploration of the --quark dynamics is possible in
hadron collisions, with results competitive and supplementary to those from
colliders. This provides a rich, and highly rewarding program that has
currently reached full maturity. In the following I report some recent results
on hadronic decays: the evidence for the charmless annihilation decay mode
, and the first reconstruction in hadron collisions of the
suppressed decays and .Comment: 5 pages,2 figures, proceedings for EPS-HEP 2011. To be published in
the on-line journal Proceedings of Scienc
B Physics at the TeVatron
The CDF and D\O\ experiments at the Tevatron collider established
that extensive and detailed exploration of the --quark dynamics is possible
in hadron collisions, with results competitive and supplementary to those from
colliders. This provides a rich, and highly rewarding program that is
currently reaching full maturity. I report a few recent world-leading results
on rare decays, CP-violation in mixing, penguin decays, and
charm physics.Comment: 5 pages, 1 figure, proceedings for IFAE2011. To be published in the
Nuovo Cimento C - Colloquia on Physic
B Physics at the Tevatron
The Fermilab Tevatron offers unique opportunities to perform measurements of
the heavier b-hadrons that are not accessible at the Y(4S) resonance. In this
summary, we describe most important heavy flavor results from DO and CDF
collaborations and we discuss prospects for future measurements, that could
reveal New Physics before the start-up of the Large Hadron Collider (LHC)
Rapid rotators revisited: absolute dimensions of KOI-13
We analyse Kepler light-curves of the exoplanet KOI-13b transiting its
moderately rapidly rotating (gravity-darkened) parent star. A physical model,
with minimal ad hoc free parameters, reproduces the time-averaged light-curve
at the ca. 10 parts per million level. We demonstrate that this Roche-model
solution allows the absolute dimensions of the system to be determined from the
star's projected equatorial rotation speed, v(e)sin(i), without any additional
assumptions; we find a planetary radius 1.33+/-0.05 R(Jup), stellar polar
radius 1.55+/-0.06 R(sun), combined mass M(*) + M(P) (\simeq M*) = 1.47 +/-
0.17 M(sun), and distance d \simeq 370+/-25 pc, where the errors are dominated
by uncertainties in relative flux contribution of the visual-binary companion
KOI-13B. The implied stellar rotation period is within ca. 5% of the
non-orbital, 25.43-hr signal found in the Kepler photometry. We show that the
model accurately reproduces independent tomographic observations, and yields an
offset between orbital and stellar-rotation angular-momentum vectors of
60.25+/-0.05 degrees.Comment: Accepted in MNRA
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