Consequences of the interference between external and internal spectator amplitudes for the lifetimes and semileptonic decay fractions of B and B mesons are discussed. Extrapolating from the constructive interference observed in 11 exclusive hadronic B decays we find an inclusive semileptonic decay fraction of (11.2± 0.5 ± 1.7)%, significantly closer to the experimental results than previous pr...

Non-leptonic hyperon weak decays are investigated in the SU(3) Skyrme model. We use a collective coordinate scheme, following the approach in which the symmetry breaking terms in the strong effective action are diagonalized exactly. To describe the weak interactions we use an octet dominated weak effective lagrangian that leads to a good description of the known 2π and 3π kaon decays. We show t...

The QCD factorization approach provides the theoretical basis for a systematic analysis of nonleptonic decay amplitudes of B mesons in the heavy-quark limit. After recalling the basic ideas underlying this formalism, several tests of QCD factorization in the decays B → D(∗)L, B → K∗γ, and B → πK,ππ are discussed. It is then illustrated how factorization can be used to obtain new constraints on ...

Using data obtained through simultaneous measurements of (~ p, ~ p ) spintransfer observables and (~ p, pγ) coincident spin observables, we have made a model-independent determination of the complete scattering amplitude for the 15.11 MeV, 1, T=1 state in C at an incident proton energy of 200 MeV, for four proton scattering angles ranging from θc.m. = 5.5 ◦ to 16.5. At each angle, 16 different ...

Survey of the mathematical models proposed to represent quantified beliefs, and their comparison. The models considered are separated into non standard probability and non probability models, according to the fact they are based on probability theory or not. The first group concerns the upper and lower probability models, the second the possibility theory and the transferable belief model.

Counting the contribution rate of a world-line formula to Feynman diagrams in φ theory, we explain the idea how to determine precise combinatorics of Bern-Kosower-like amplitudes derived from a bosonic string theory for N -point two-loop Feynman amplitudes. In this connection we also present a method to derive simple and compact world-line forms for the effective action. PACS: 11.15.Bt; 11.55.-...

We show that the f0(980) and a0(980) states appearing in scattering and production processes can be described quite well by the two-channel Oller-Oset-Peláez (OOP) version of unitarized chiral theories. It is impossible, however, to deduce a decisive conclusion on the nature of them from the fitting to experimental data alone. Using explicit Nc dependence of parameters in OOP amplitudes we demo...

We show that the BRST operator of Neveu-Schwarz-Ramond superstring is closely related to de Rham differential on the moduli space of decorated super-Riemann surfaces P. We develop formalism where superstring amplitudes are computed via integration of some differential forms over a section of P over the super moduli space M. We show that the result of integration does not depend on the choice of...

Past work has demonstrated that the reward positivity (RewP) indexes a performance monitoring system sensitive to positive outcomes. However, studies have not investigated how approach-motivated states occurring in goal pursuit influence performance monitoring. Using a modified monetary incentive delay task, participants played a reaction time game evoking approach-motivated pregoal (reward tri...