ω- πγtransition form factor in proton-proton collisions
نویسندگان
چکیده
منابع مشابه
Production of ω-mesons in proton-proton collisions
The production of ω-mesons in proton-proton collisions for proton incident energies up to 2.2 GeV is investigated within a mesonexchange model of hadronic interactions. We find a large cancellation between the dominant πρω meson-exchange current and nucleonic current contributions. A comparison with preliminary data from SATURNE calls for the inclusion of off-shell form factors at the NNω and π...
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We present results for the pp → ppω reaction studied by considering two different scenarios: with and without the inclusion of nucleon resonance excitations. The recently measured angular distribution by the COSY-TOF Collaboration at an excess energy of Q = 173 MeV and the energy dependence of the total cross section data for π−p → ωn are used to calibrate the model parameters. The inclusion of...
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In a recent paper, Tye and Wong (TW) have argued that sphaleron-induced transitions in highenergy proton-proton collisions should be enhanced compared to previous calculations, based on a construction of a Bloch wave function in the periodic sphaleron potential and the corresponding pass band structure. Here we convolute the calculations of TW with parton distribution functions and simulations ...
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The production of φ-mesons in proton-proton collisions is investigated within a relativistic meson-exchange model of hadronic interactions. The experimental prerequisites for extracting the NNφ coupling strength from this reaction are discussed. In the absence of a sufficient set of data, which would enable an accurate determination of the NNφ coupling strength, we perform a combined analysis, ...
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In this article, we investigate the contribution of the high twist Feynman diagrams to the large-pT pion production cross section in proton-proton collisions and we present the general formulae for the high and leading twist differential cross sections. The pion wave function where two non-trivial Gegenbauer coefficients a2 and a4 have been extracted from the CLEO data, two other pion model wav...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2007
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2006-10181-x