搜索结果: 1-15 共查到“理论物理学 PI”相关记录19条 . 查询时间(0.062 秒)
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 ...
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...
K ->pi pi electroweak penguins in the chiral limit
Dispersion electroweak penguin matrix element chiral limit
2014/12/20
We report on dispersive and finite energy sum rule analyses of the electroweak penguin matrix elements left angle bracket(ππ)2|Q7,8|K0right-pointing angle bracket in the chiral limit. We accomplish th...
Abstract: The traditional Pi-theorem tells us that for any dimensionally invariant relation there exists a full set of independent dimensionless "Pi groups" which can be used to nondimensionalise the ...
First Observation of the Decays chi_{cJ} -> pi^0 pi^0 pi^0 pi^0
Decays chi_{cJ} -> pi^0 pi^0 pi^0 pi^0
2011/1/5
We present a study of the P-wave spin -triplet charmonium cJ decays (J = 0, 1, 2) into 0000.The analysis is based on 106 million ′ decays recorded with the BESIII detector at the BEPCII electron...
Precision Measurement of CP Violation in D0->pi+pi- at CDF
Precision Measurement CP Violation D0->pi+pi- at CDF
2011/1/4
We report a preliminary measurement of the CP violating asymmetry in D0 →p+p− using approximately 215·000 decays reconstructed in about 5.94 fb−1 of CDF data.
New measurement of the K+- --> pi+-mu+mu- decay
New measurement he K+- --> pi+-mu+mu- decay
2011/1/4
A sample of 3120 K± → π±μ+μ− decay candidates with (3.3 ± 0.7)% background contamination has been collected by the NA48/2 experiment at the CERN SPS, allowing a detailed study of the decay prope...
We perform a Dalitz plot analysis of about 100, 000 D+ s decays to K+K−+ and measure the
complex amplitudes of the intermediate resonances which contribute to this decay mode.