Evaluation of the E2/M1 ratio in the N → ∆(1232) transition from the ⃗γ⃗p → pπ0 reaction; Physical Review C; Vol. 109, iss. 5
| Parent link: | Physical Review C: covering nuclear physics.— .— New York: American Physical Society Vol. 109, iss. 5.— 2024.— Article number 055201, 15 p. |
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| সংস্থা লেখক: | |
| অন্যান্য লেখক: | , , , , , |
| সংক্ষিপ্ত: | Title screen A new data set for the helicity-dependent differential cross section of the single-meson photoproduction reaction 𝛾𝑝→𝑝𝜋0 was obtained for the photon energy interval 150–400 MeV. The experiment was performed at the A2 tagged photon facility of the Mainz Microtron MAMI using a circularly polarized photon beam and a longitudinally polarized proton target. The reaction products were detected with the large-acceptance Crystal Ball and TAPS calorimeters covering 97% of the full solid angle. These new results, obtained with a fine energy and polar angle binning, greatly increase both the existing quantity and quality of the data available for this observable. A moment analysis, based on a finite expansion in Legendre polynomials, was applied to these data by using a bootstrap-based fitting method to correctly account for their systematic uncertainties. From the resulting decomposition of the differential cross sections, the 𝐸2/𝑀1 ratio for the 𝑁→Δ(1232) transition was determined to be [−2.38±0.16(stat.+sys.)±0.10(model)]%. Combining this value with previous results also allowed us to evaluate the most precise available estimate of the 𝐸2/𝑀1 ratio to be used for all further reference and model comparisons. Текстовый файл AM_Agreement |
| ভাষা: | ইংরেজি |
| প্রকাশিত: |
2024
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| বিষয়গুলি: | |
| অনলাইন ব্যবহার করুন: | https://doi.org/10.1103/PhysRevC.109.055201 |
| বিন্যাস: | বৈদ্যুতিক গ্রন্থের অধ্যায় |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=675793 |
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| 200 | 1 | |a Evaluation of the E2/M1 ratio in the N → ∆(1232) transition from the ⃗γ⃗p → pπ0 reaction |f E. Mornacchi, P. Pedroni, F. Afzal [et al.] | |
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| 330 | |a A new data set for the helicity-dependent differential cross section of the single-meson photoproduction reaction →0 was obtained for the photon energy interval 150–400 MeV. The experiment was performed at the A2 tagged photon facility of the Mainz Microtron MAMI using a circularly polarized photon beam and a longitudinally polarized proton target. The reaction products were detected with the large-acceptance Crystal Ball and TAPS calorimeters covering 97% of the full solid angle. These new results, obtained with a fine energy and polar angle binning, greatly increase both the existing quantity and quality of the data available for this observable. A moment analysis, based on a finite expansion in Legendre polynomials, was applied to these data by using a bootstrap-based fitting method to correctly account for their systematic uncertainties. From the resulting decomposition of the differential cross sections, the 2/1 ratio for the →Δ(1232) transition was determined to be [−2.38±0.16(stat.+sys.)±0.10(model)]%. Combining this value with previous results also allowed us to evaluate the most precise available estimate of the 2/1 ratio to be used for all further reference and model comparisons. | ||
| 336 | |a Текстовый файл | ||
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| 461 | 1 | |t Physical Review C |o covering nuclear physics |c New York |n American Physical Society | |
| 463 | 1 | |t Vol. 109, iss. 5 |v Article number 055201, 15 p. |d 2024 | |
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| 701 | 1 | |a Wunderlich |b Y. | |
| 701 | 1 | |a Abt |b S. | |
| 701 | 1 | |a Fiks (Fix) |b A. I. |c Physicist |c Professor of Tomsk Polytechnic University, Doctor of Physical and Mathematical Sciences |f 1968- |g Alexander Ivanovich |9 17419 | |
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