| 000 | 02997nlm1a2200469 4500 | ||
|---|---|---|---|
| 001 | 651574 | ||
| 005 | 20231030041040.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\16823 | ||
| 035 | _aRU\TPU\network\3821 | ||
| 090 | _a651574 | ||
| 100 | _a20161116a2007 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 102 | _aUS | ||
| 135 | _adrnn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aFirst measurement of the helicity dependence for the γp→ Pпreaction _fJ. Ahrens [et al.] |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: p. 21 (53 tit.)] | ||
| 330 | _aWe have constructed an isobar model for theη-photoproduction on the proton in the energy region up to the photon lab energy K 0 = 3 GeV. The database involved into the fitting procedure includes precise results for the cross-section and for theT-asymmetry of the processγp→ηpnear threshold obtained at MAMI and ELSA as well as recent results for theΣ-asymmetry and for the angular distribution measured at higher energies in Grenoble and also more recent measurements performed at JLab for the photon energies up to 2 GeV. The model includes twelve nucleon resonances: S 11(1535), S 11(1650), S 11(1825), P 11(1440), P 13(1720), D 13(1520), D15(1675), F 15(1680), F 17(1990), G 17(2190), G 19(2250), H 19(2220), and the background consisting of the nucleon pole term and the vector meson exchange in the t-channel. To explain the observed energy dependence of the integrated cross-section, two s-wave resonances, S 11(1650) and S11(1825), have to be taken into account along with the dominating S 11(1535). The integrated cross-section as well as the angular distribution andΣ-asymmetry predicted by the model are in good agreement with the data. Above the photon energyK 0 = 2 GeV, the calculated cross-section exhibits an appreciable dependence on theρ- andω-meson contribution, whose coupling with nucleons is not well defined. Several versions of extending the model to higher energies are considered. | ||
| 333 | _aРежим доступа: по договору с организацией-держателем ресурса | ||
| 461 |
_tThe European Physical Journal A - Hadrons and Nuclei _d1998- |
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| 463 |
_tVol. 34 _v[P. 11-21] _d2007 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _aфотоны | |
| 610 | 1 | _aсечение | |
| 701 | 1 |
_aAhrens _bJ. |
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| 701 | 1 |
_aAltieri _bS. |
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| 701 | 1 |
_aAnnand _bJ. R. M. |
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| 701 | 1 |
_aArends _bH. -J. |
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| 701 | 1 |
_aBeck _bR. |
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| 701 | 1 |
_aBlackston _bM. A. |
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| 701 | 1 |
_aBradtke _bC. |
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| 701 | 1 |
_aBraghieri _bA. |
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| 701 | 1 |
_ad'Hose _bN. |
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| 701 | 1 |
_aDutz _bH. |
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| 701 | 1 |
_aFiks (Fix) _bA. I. _cmathematician _cProfessor of Tomsk Polytechnic University, doctor of physico-mathematical Sciences _f1968- _gAlexander Ivanovich _2stltpush _3(RuTPU)RU\TPU\pers\33830 |
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| 801 | 2 |
_aRU _b63413507 _c20161116 _gRCR |
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| 856 | 4 | _uhttp://dx.doi.org/10.1140/epja/i2007-10491-5 | |
| 942 | _cCF | ||