Partial wave analysis of J/ψ→ppπ<SUP>0</SUP> and measurement of J/ψ→ppη, ppη&acute;

YANG Hong-Xun (for the BESⅡ collaboration)

doi:10.1088/1674-1137/33/12/048

Chinese Physics C> 2009, Vol. 33> Issue(12) : 1331-1335 DOI: 10.1088/1674-1137/33/12/048

Partial wave analysis of J/ψ→ppπ⁰ and measurement of J/ψ→ppη, ppη´

YANG Hong-Xun (for the BESⅡ collaboration)

(Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China)

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Abstract：
Based on 58 million J/ψ data collected with the BESⅡ detector at the BEPC, Partial Wave Analysis(PWA) is performed on J/ψ→ppπ⁰. The new excited baryon N(2065) is confirmed. Clear signals for other N* states are observed and the corresponding masses, widths and spin-parity are also measured. Processes such as J/ψ→ppη, ppη′ are also studied and the branching ratios are measured.

References

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. BAI J Z et al (BES collaboration). Nucl. Inst. and Meths.A, 2001, 458: 6272. Ablikim M et al (BES collaboration). Phys. Rev. Lett.,2006, 97: 0620013. Amsler C et al. Phys. Lett. B, 2008, 667: 14. Adler L, Dashen R F. Current Algebra and Application toParticle Physics. New York: Benjamin, 1968; Lee B W.Chiral Dynamics. New York: Gordon and Breach, 1972

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YANG Hong-Xun (for the BESⅡ collaboration). Partial wave analysis of J/ψ→ppπ⁰ and measurement of J/ψ→ppη, ppη´[J]. Chinese Physics C, 2009, 33(12): 1331-1335. doi: 10.1088/1674-1137/33/12/048

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Received: 2009-08-07
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Partial wave analysis of J/ψ→ppπ⁰ and measurement of J/ψ→ppη, ppη´

YANG Hong-Xun (for the BESⅡ collaboration)

(Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China)

Received Date: 2009-08-07
Accepted Date: 1900-01-01
Available Online: 2009-12-05

Abstract:

Based on 58 million J/ψ data collected with the BESⅡ detector at the BEPC, Partial Wave Analysis(PWA) is performed on J/ψ→ppπ⁰. The new excited baryon N(2065) is confirmed. Clear signals for other N* states are observed and the corresponding masses, widths and spin-parity are also measured. Processes such as J/ψ→ppη, ppη′ are also studied and the branching ratios are measured.