| Project/Area Number |
06640419
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | Josai Junior College for Women |
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Principal Investigator |
NOZAWA Satoshi Josai Junior College for Women Department of Business, Associate Professor, 女子短期大学部・経営学科, 助教授 (00258914)
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| Co-Investigator(Kenkyū-buntansha) |
MORITA Reiko Josai Junior College for Women Department of Literature, Professor, 女子短期大学部・一般教育等, 教授 (90258913)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1994: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | pion / photoproduction / Helium 3 |
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| Research Abstract |
One of the main Purposes of this project is to apply a dynamical model of the pion photoproduction on the nucleon constructed by us to fewbody systems such as deuteron and ^3He nucleus. By doing this we hope that one can get a deeper understanding on the pion photoproduction mechanism for the fewbody systems through the dynamical modl.
We have investigated "the pion electroproduction reaction ^3He (e, e'pi) " to study the preformed DELTA-component in the ^3He wave function.
(1) We have shown that the previous analysis based upon the isospin symmetry with the DELTA-dominance is not valid. It is argued that there is a considerable contribution from the Born diagrams. This implies that the large enhancement of the DELTA knock-out process in the pi^+/pi^- ratio measurement should not be expected.
(2) We have calculated the coincidence cross sections of ^3He (e, e'pi) in the DELTA-resonance energy region. With the cross sections, we have explored the sensitivity to the DELTA-component in ^3He wave function. It has been shown that the probability effect of the DELTA-component is negligible in the transverse cross sections and is very small even in the longitudinal cross sections. It has been also suggested that the interference effect of the DELTA-component is required to obtain the sizable sensitivity.
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