نتایج جستجو برای: ππ electron
تعداد نتایج: 309859 فیلتر نتایج به سال:
W(CNAryl)6 complexes containing 2,6-diisopropylphenyl isocyanide (CNdipp) are powerful photoreductants with strongly emissive long-lived excited states. These properties are enhanced upon appending another aryl ring, e.g., W(CNdippPh(OMe2))6; CNdippPh(OMe2) = 4-(3,5-dimethoxyphenyl)-2,6-diisopropylphenylisocyanide (Sattler et al. J. Am. Chem. Soc. 2015, 137, 1198-1205). Electronic transitions a...
Two sources of strong phases in the decays B to ππ are identified: (1) “quasi-elastic scattering” corresponding to intermediate states like ππ and ρρ, (2) “cc̄” corresponding to intermediate states like DD̄ and D∗D̄∗. Possibilities of using data to identify these two sources are discussed and illustrated. Present data suggests both sources may be significant. The decay of B → ππ may be considered ...
A separable potential formalism is used to describe the ππ and KK interactions in the I G (J P C) = 0 + (0 ++) states in the energy range from the ππ threshold up to 1.4 GeV. Introduction of relativistic propaga-tors into a system of Lippmann-Schwinger equations leads to a very good description of the data (χ 2 = 0.93 per one degree of freedom). Three poles are found in this energy region: f 0 ...
We propose a non relativistic effective Lagrangian approach to study hadronic atom observables in the framework of QCD (including photons). We apply our formalism to derive a general expression for the width of the ππ atom decaying into two neutral pions. It contains all terms at leading and next-to-leading order in isospin breaking. The result allows one to evaluate the combination a0 − a2 of ...
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