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有机分子大多是通过极弱的范德华力相互作用而形成晶体，因此多晶相是有机半导体材料中非常普遍的一种现象。不同堆积结构的晶相具有不同的电子耦合作用，从而导致不同的电荷传输行为。如何可控组装生长高迁移率的晶相一直以来都是分子电子学中一个极具有挑战性的课题，涉及到分子结构、晶体工程和超分子自组装等多方面的内容。
2014年12月28日，“功能pi-体系的分子工程”先导专项2014年度工作会议在化学所召开。中科院前沿科学与教育局数理化处相关领导、依托单位和部分参加单位领导、专项首席科学家、专项骨干以及专项管理办公室成员等60多人参加了会议。
Chiral Symmetry and Electroweak pi,K, n Processes
Chiral perturbation theory the low energy electroweak symmetry goldstone boson
2014/12/23
Recently the development of chiral perturbation theory has allowed the generation of rigorous low-energy theorems for various hadronic processes based only on the chiral invariance of the underlying Q...
K(S)-]GAMMA-GAMMA, K(L)-]PI(0)GAMMA-GAMMA AND UNITARITY
Γ agreement experimental value lap chiral perturbation theory the dispersion relation
2014/12/23
Agreement between the experimental value Γ(KS→γγ) and the number predicted via a one-loop chiral perturbation theory calculation has been cited as a success for the latter. On the other hand the one-l...
REANALYSIS OF THE DECAY-K-L-]PI(0)E(+)E(-)
Decay analyze the attenuation mass matrix the amplitude
2014/12/23
The decay KL→π0e+e- is searched for as a signal of direct ΔS=1 CP violation. We provide a thorough updating of the analysis of the three components of the decay: (1) direct CP violation, (2) CP violat...
Measurement of the γ3π process has revealed a possible conflict with what should be a solid prediction generated by the chiral anomaly. We show that inclusion of appropriate energy-momentum dependence...
K-L->pi(0)gamma e(+)e(-) and its relation to CP and chiral tests
Decay in Kuala Lumpur non radiation chiral perturbation theory the quantitative easing policy
2014/12/22
The decay KL→π0γe+e- occurs at a higher rate than the nonradiative process KL→π0e+e-, and hence can be a background to CP violation studies using the latter reaction. It also has interest in its own r...
Chiral predictions for K-L ->pi(0)gamma mu(+)mu(-)
Chiral forecasting decay muon branching ratios differential branch ratio calculation
2014/12/22
We have previously analysed the chiral predictions for the decay KL ! 0 e+e− and discussed how experimental measurements of this process can help our understanding of chiral theories and of CP ...
K ->pi pi phenomenology in the presence of electromagnetism
Electromagnetic the dollar the electromagnetic radiation
2014/12/22
We describe the influence of electromagnetism on the phenomenology of $K \to \pi\pi$ decays. This is required because the present data were analyzed without inclusion of electromagnetic radiative corr...
Electromagnetic corrections to K ->pi pi. II. Dispersive matching
Electromagnetic virtual photons chiral perturbation theory the model of the resonance
2014/12/22
We express the leading electromagnetic corrections in K → ππ as integrals over the virtual photon squared-momentum Q2. The high Q2 behavior is obtained via the operator product expansion. The low Q2 b...
Electromagnetic corrections to K ->pi pi. I. Chiral perturbation theory
Electromagnetic octet chiral perturbation theory the amplitude
2014/12/22
An analysis of electromagnetic corrections to the (dominant) octet K → ππ hamiltonian using chiral perturbation theory is carried out. Relative shifts in amplitudes at the several per cent level are f...
Chiral symmetry and the parity-violating NN pi Yukawa coupling
Lagrange differential pv coupling constant the standard model
2014/12/22
We construct the complete SU(2) parity-violating (PV) π,N,Δ interaction Lagrangian with one derivative, and calculate the chiral corrections to the PV Yukawa NNπ coupling constant hπ through O(1/Λχ3) ...
Parity-violating photoproduction of pi(+/-) on the Delta resonance
Asymmetry of real - photon resonance asymmetric nonzero coupling dynamic hadron p-wave mystery hyperon in violation of the o 'hara theorem of weak radiation hyperon decay
2014/12/22
We analyze the real-photon asymmetry Aγ± for the parity-violating (PV) π± production on the Δ resonance via the reactions γ⃗+p→Δ+→π++n and γ⃗+d→Δ0+p→π-+p+p. This asymmetry is nonvanishing ...
Determination of <(pi pi)I=2/ohm 7,8/K0 > in the chiral limit
Weak matrix elements no cover dispersion
2014/12/22
We reconsider the dispersive evaluation of the weak matrix elements h()I=2|Q7,8|K0i in the chiral limit. The perturbative matching is accomplished fully within the scheme dependence used in the two ...
Decay pi(0)->gamma gamma to next to leading order in chiral perturbation theory
Decay of amplitude induced mixing pure state low energy
2014/12/20
The π0→γγ decay width is analyzed within the combined framework of chiral perturbation theory and the 1/Nc expansion up to O(p6) and O(p4×1/Nc) in the decay amplitude. The η′ is explicitly included in...