A1 → 3π decay

Pion-pion scattering and the K → 3π decay amplitudes

We revisit the recently proposed method for the determination of the ππ scattering length combination a0 − a2, based on the study of the π0π0 spectrum in K+ → π+π0π0 . In view of a precision measurement, we discuss here the effects due to smaller absorptive contributions to the K+ → π+π0π0 and K+ → π+π+π− amplitudes. We outline a method of analysis that can lead to a precision determination of ...

Observation and Polarization Measurement of B[superscript 0]-->a1(1260)[superscript +]a1(1260)[superscript -] Decay

The d 3Π state of LiRb.

We report our spectroscopic studies of the d 3Π state of ultra-cold 7Li85Rb using resonantly enhanced multi-photon ionization and depletion spectroscopy with bound-to-bound transitions originating from the metastable a 3Σ+ state. We evaluate the potential of this state for use as the intermediate state in a stimulated-Raman-adiabatic-passage transfer scheme from triplet Feshbach LiRb molecules ...

Analysis of New Aggregation Operators: Mean 3Π

Knowledge based systems need to deal with aggregation and fusion of data with uncertainty. To use many sources of information in numerical forms for the purpose of decision or conclusion, systems suppose to have tools able to represent the knowledge in a mathematical form. One of the solutions is to use fuzzy logic operators. We present in this article an improvement of the triple Π operator in...

Hadronic matrix elements for TAUOLA: 3π and KKπ channels

We emphasize that the motivation for including our hadronic matrix elements in TAUOLA is not only theoretical. We also show that our expressions describe better the τ → 3π ALEPH data and are able to fit BABAR data on the isovector component of ee → KKπ. The theoretical foundations of our framework are the large-NC limit of QCD, the chiral structure exhibited at low energies and the proper asymp...