Near-threshold photo- and electroproduction of neutral pions on protons

Результат исследований: Материалы для журналаСтатья

Выдержка

The state of the art of the problem on threshold neutral-pion production on protons by photons and electrons is examined. New experimental data on the threshold of pion production are analyzed within the phenomenological model based on the gauge invariance, the hypothesis of partial conservation of the axial-vector current, and allowance for explicit chiral-symmetry breaking. The amplitudes of the p-wave threshold multipoles and the photon asymmetry are derived for the pion photoproduction on protons with a photon energy of 159.5 MeV. The differential cross sections are calculated as functions of the pion emission angle and amplitudes of the s- and p-wave multipoles for the threshold pion electroproduction on protons at the squared momentum transfer k 2 = 0.05 GeV 2/c 2. The total reaction cross sections are also obtained as functions of k 2. The results obtained are compared with new experimental data and available theoretical predictions.

Язык оригиналаАнглийский
Страницы (с-по)870-884
Число страниц15
ЖурналRussian Physics Journal
Том45
Номер выпуска9
СостояниеОпубликовано - 2002

Отпечаток

photoproduction
pions
thresholds
protons
multipoles
photons
vector currents
cross sections
gauge invariance
allowances
sands
momentum transfer
conservation
broken symmetry
asymmetry
predictions
electrons
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Цитировать

Near-threshold photo- and electroproduction of neutral pions on protons. / Tabachenko, A. N.

В: Russian Physics Journal, Том 45, № 9, 2002, стр. 870-884.

Результат исследований: Материалы для журналаСтатья

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