3,916 research outputs found
Phase Motion of the Scalar Amplitudes in , Decays
We make a direct and model-independent measurement of the low
mass phase motion in the decay. Our preliminary
results show a strong phase variation, compatible with the isoscalar
meson. This result confirms our previous result where we found
evidence for the existence of this scalar particle using full Dalitz-plot
analysis. We apply the Amplitude Difference (AD) method to the same Fermilab
E791 data sample used in the preceding analysis. We also give an example of how
we extract the phase motion of the scalar amplitude, looking at the
in decay.Comment: Invited talk given at Scalar Meson Workshop, SUNY Institute of
Technology, May 2003, Utica, NY. 14 pages, 13 figure
Charmless B decays in modes with similar tree and penguin contributions
Charmless decays are dominated by contributions from the short distance
amplitudes from tree level and penguin loop-level amplitudes. The Tree
contribution presents a weak phase . The relationship between these two
amplitudes can generated a CP asymmetry depending from the relative amount
among them in a particular decay. In multi-body charmless decays, these
relative contribution can change along the phase space, given a non isotropic
distribution of CP asymmetries in the Dalitz plot. Two recent LHCb analyses
involving charmless multi-body B decays are discussed: the obsevation of CP
asymmetries in the phase space of the three-body decays and ; and the angular analysis of the
decay.Comment: Proceedings to FPCP-2014- Flavor Physics \& CP Violation, Marseille,
France, May 25-30, 201
Final state hadronic interactions and non-resonant decays
We evaluate the non-resonant decay amplitude of the process using an approach based on final state hadronic interactions
described in terms of meson exchanges. We conclude that this mechanism
generates inhomogeneities in the Dalitz plot of the B decay.Comment: 6 pages, 5 figures. Major changes. Version accepted for publication
in Phys. Lett.
Looking for meson molecules in B decays
We discuss the possibility of observing a loosely bound molecular state in a
B three-body hadronic decay. In particular we use the QCD sum rule approach to
study a molecular current. We consider an isovector-scalar
molecular current and we use the two-point and
three-point functions to study the mass and decay width of such state. We
consider the contributions of condensates up to dimension six and we work at
leading order in . We obtain a mass around 1.1 GeV, consistent with a
loosely bound state, and a decay width
around 10 MeV.Comment: 7 pages, 8 figure
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