INVESTIGATION OF DECAY PROCESS ψ (2S) → π+ π- AND BRANCHING RATIO CALCULATION

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GHAHRAMANY N.; KHOSRAVI R.

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Journal Paper

Paper Information

Journal: JOURNAL OF THEORETICAL AND APPLIED PHYSICS (IRANIAN PHYSICAL JOURNAL) Year:2008 | Volume:2 | Issue:2 Page(s): 55-59

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Title

INVESTIGATION OF DECAY PROCESS ψ (2S) → π+ π- AND BRANCHING RATIO CALCULATION

Author(s)

GHAHRAMANY N. | KHOSRAVI R. | Issue Writer Certificate

Keywords

FEYNMAN DIAGRAM

COLOR CONSERVATION

ONE-GLUON MECHANISM

CHARGE CONJUGATION

Abstract

According to the existing particle data group (PDG) information, the branching ratio for y (2s) ®p+p- is (8±5)×10-5 (1). Two different values for this decay namely (0.8±0.8±0.2) x 10-5, 0.84±0.55+0.16-0.35 X 10-5 and 1.8 x 10-5are reported by experimentallists. In this paper it is attempted to study y-decay process theoretically via FEYNMAN DIAGRAMs and it is concluded that the only effective way that y can decay into p+ and p- mesons is via one photon emission in an electromagnetic process. This conclusion is based upon the fact that COLOR CONSERVATION is violated in ONE-GLUON MECHANISM and CHARGE CONJUGATION is violated in two-gluon mechanism and Gparity and is ospin is violated in three-gluon mechanism. By presenting the FEYNMAN DIAGRAM, the branching ratio of y-decay is calculated. The calculated value is in good agreement with the recently reported experimental data.

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APA: Copy

GHAHRAMANY, N., & KHOSRAVI, R.. (2008). INVESTIGATION OF DECAY PROCESS ψ (2S) → π⁺ π^- AND BRANCHING RATIO CALCULATION. JOURNAL OF THEORETICAL AND APPLIED PHYSICS (IRANIAN PHYSICAL JOURNAL), 2(2), 55-59. SID. https://sid.ir/paper/318627/en

Vancouver: Copy

GHAHRAMANY N., KHOSRAVI R.. INVESTIGATION OF DECAY PROCESS ψ (2S) → π⁺ π^- AND BRANCHING RATIO CALCULATION. JOURNAL OF THEORETICAL AND APPLIED PHYSICS (IRANIAN PHYSICAL JOURNAL)[Internet]. 2008;2(2):55-59. Available from: https://sid.ir/paper/318627/en

IEEE: Copy

N. GHAHRAMANY, and R. KHOSRAVI, “INVESTIGATION OF DECAY PROCESS ψ (2S) → π⁺ π^- AND BRANCHING RATIO CALCULATION,” JOURNAL OF THEORETICAL AND APPLIED PHYSICS (IRANIAN PHYSICAL JOURNAL), vol. 2, no. 2, pp. 55–59, 2008, [Online]. Available: https://sid.ir/paper/318627/en

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