A Systematic DWIA Analysis of the Conventional Mechanism for Pion Double Charge Exchange

Pan Lingjun; Jiang Huanqing; Zou Bingsong

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2024年10月30日

Chinese Physics C> 1991, Vol. 15> Issue(S1) : 51-61

A Systematic DWIA Analysis of the Conventional Mechanism for Pion Double Charge Exchange

1 Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing, China;
2 Institute of Theoretical Physics, the Chinese Academy of Sciences, Beijing, China

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Abstract：
In the framework of the distorted wave impulse approximation,a systematic analysis is performed for the contribution of the conventional mechanism to the double charge exchange reaction to the double isobaric analog state. The effects of distortions of pions, nuclear wave functions, short-range correlation functions, parameters of the form factors, the spin-dependent term in the pion-nucleon amplitude, etc. are examined. It is shown that all these elements are very important and not negligible for the conventional mechanism. But after combining the effects of all these elements, the conventional mechanism is still not able to reproduce the experimental excitation functions and angular distributions for the energy region of 0-300 MeV. Therefore, the effects of some other mechanisms should be added.

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[6]	HUANG Fei . Forward pion-nucleon charge exchange reaction and Regge constraints. Chinese Physics C, 2009, 33(12): 1318-1321. doi: 10.1088/1674-1137/33/12/045
[7]	Ma Weixing . Searching for Dibaryon With Pion-Nucleus Double Charge Exchange Reaction. Chinese Physics C, 1998, 22(10): 955-958.
[8]	Zhang Weining , Liu Yiming , Huo Lei , D. Keane , S. Y. Fung . Analysis of the Coherence of Pion-Emitting Source Through Multipion Correlations. Chinese Physics C, 1996, 20(S3): 269-276.
[9]	Peng Hongan , Qin Kecheng , He Zhenmin . Double Pomeron Exchange and J/ψ, γ Production at High Energy p+p(p) Collisions. Chinese Physics C, 1995, 19(S1): 51-59.
[10]	QING Cheng-Rui , HE Zhuo-Xiu , ZOU Bing-Song , JIANG Huan-Qing . Nuclear Fermi Motion Effect on Pion Double Charge Exchange. Chinese Physics C, 1991, 15(1): 46-51.
[11]	JIANG Huan-Qing , Zou Bing-Song . Pion-Nucleus Double Charge Exchange. Chinese Physics C, 1991, 15(12): 1115-1130.
[12]	PAN Ling-Jun , JIANG Huan-Qing , ZOU Bing-Song . A SYSTEMATIC DISTORTED WAVE IMPULSE APPROXIMATION ANALYSIS OF THE CONVENTIONAL MECHANISM FOR PION DOUBLE CHARGE EXCHANGE. Chinese Physics C, 1990, 14(11): 1014-1022.
[13]	WU Hui-Fang , SONG Hong-Qiu . PION-SINGLE-CHARGE-EXCHANGE CONTRIBUTION TO NEUTRINOLESS DOUBLE BETA DECAY. Chinese Physics C, 1989, 13(8): 714-718.
[14]	Zou Bingsong , Jiang Huanqing . A Quark Model Calculation for the Short-Range Contribution in the Prion Double-Charge-Exchange Reaction. Chinese Physics C, 1989, 13(S4): 405-414.
[15]	ZOU Bing-Song , JIANG Huan-Qing . SECOND ORDER PION-NUCLEUS OPTICAL POTENTIAL AND DOUBLE CHARGE EXCHANGE REACTION. Chinese Physics C, 1988, 12(5): 627-634.
[16]	Chen Tao , Su Rukeng . The One Pion Exchange Potential at Finite Temperature. Chinese Physics C, 1988, 12(S2): 131-136.
[17]	Chen Kezhong , Jiang Huanqing . Multinucleon Effect in the Pion Single Charge Exchange Reaction. Chinese Physics C, 1988, 12(S1): 37-44.
[18]	Zou Bingsong , Jiang Huanqing . Second Order Pion-Nucleus Optical Potential and the Double Charge Exchange Reaction. Chinese Physics C, 1988, 12(S3): 271-280.
[19]	LIU BO , CHIANG HUAN-CHING . THE DWIA ANALYSIS OF PION-¹⁸O INELASTIC SCATTERING. Chinese Physics C, 1982, 6(6): 743-749.
[20]	Liu Bo , Zhang Zong-ye . THE ISOBAR EXCITATION MECHANISM OF THE PION SINGLE CHARGE EXCHANGE REACTION. Chinese Physics C, 1980, 4(6): 767-770.

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Pan Lingjun, Jiang Huanqing and Zou Bingsong. A Systematic DWIA Analysis of the Conventional Mechanism for Pion Double Charge Exchange[J]. Chinese Physics C, 1991, 15(S1): 51-61.

Pan Lingjun, Jiang Huanqing and Zou Bingsong. A Systematic DWIA Analysis of the Conventional Mechanism for Pion Double Charge Exchange[J]. Chinese Physics C, 1991, 15(S1): 51-61. shu

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Received: 1990-04-10

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Supported in part by the National Natural Science Foundation of China.

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

A Systematic DWIA Analysis of the Conventional Mechanism for Pion Double Charge Exchange

1 Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing, China;
2 Institute of Theoretical Physics, the Chinese Academy of Sciences, Beijing, China

Received Date: 1990-04-10

Fund Project: Supported in part by the National Natural Science Foundation of China.

Abstract: In the framework of the distorted wave impulse approximation,a systematic analysis is performed for the contribution of the conventional mechanism to the double charge exchange reaction to the double isobaric analog state. The effects of distortions of pions, nuclear wave functions, short-range correlation functions, parameters of the form factors, the spin-dependent term in the pion-nucleon amplitude, etc. are examined. It is shown that all these elements are very important and not negligible for the conventional mechanism. But after combining the effects of all these elements, the conventional mechanism is still not able to reproduce the experimental excitation functions and angular distributions for the energy region of 0-300 MeV. Therefore, the effects of some other mechanisms should be added.