Neutral Pion Decay
نویسندگان
چکیده
منابع مشابه
Electromagnetic Pion Form Factor and Neutral Pion Decay Width
The electromagnetic pion form factor, Fπ(q 2), is calculated for spacelike-q2 in impulse approximation using a confining quark propagator, S, and a dressed quarkphoton vertex, Γμ, obtained from realistic, nonperturbative Dyson-Schwinger equation studies. Good agreement with the available data is obtained for Fπ(q 2) and other pion observables, including the decay π0 → γ γ. This calculation sugg...
متن کاملTwo-photon decay of the neutral pion in lattice QCD.
We perform a nonperturbative calculation of the π(0) → γγ transition form factor and the associated decay width using lattice QCD. The amplitude for a two-photon final state, which is not an eigenstate of QCD, is extracted through a Euclidean time integral of the relevant three-point function. We utilize the all-to-all quark propagator technique to carry out this integration as well as to inclu...
متن کاملNeutral pion decay into in dense Skyrmion matter
Neutrinos and their means of production play an important role in cosmological and astrophysical phenomena [1]. In particular in this paper we shall be concerned with the weak emission of a neutrino-antineutrino pair from a neutral pion, 0 ! , which figures centrally in the pionpole mechanism [2,3] for the process ! 0 ! relevant to the neutrino emission process ! . The latter has been suggested...
متن کاملNeutral pion electroproduction off deuterium
Threshold neutral pion electroproduction on the deuteron is studied in the framework of baryon chiral perturbation theory at next-to-leading order in the chiral expansion. To this order in small momenta, the amplitude is finite and a sum of twoand three-body interactions with no undetermined parameters. We calculate the S-wave multipoles for threshold production and the deuteron S-wave cross se...
متن کاملSearch for Second Neutral Pion
There is evidence of a second neutral pion from: (1) the anomalous branching ratios in the reactions p p → ππ and p d → ππN , and (2) the 1960’s results of Tsai-Chü et al. for antinucleon annihilation stars in emulsions. The anomaly of (1) is eliminated if the two neutral pions in the reactions p p → π π and p d → π π n are not identical. Tsai-Chü et al. observed a second neutral pion that “dec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Annual Review of Nuclear and Particle Science
سال: 2011
ISSN: 0163-8998,1545-4134
DOI: 10.1146/annurev-nucl-102010-130426