pp final state interaction in J=/ψ→γpp

ZENG Zhuo-Quan; GUO Xin-Heng; SHEN Peng-Nian; DING Yi-Bing

doi:10.1088/1674-1137/36/5/004

Chinese Physics C> 2012, Vol. 36> Issue(5) : 399-402 DOI: 10.1088/1674-1137/36/5/004

pp final state interaction in J=/ψ→γpp

Abstract
HTML
Reference
Related

PDF

Abstract：
The phenomenon of the near pp-threshold enhancement observed in the J=/ψ→γpp decay is studied by using the enhancement factor method with a simpler one-pion-exchange potential between p and p. The Jost function caused by the mentioned potential is perturbatively calculated in the zero-th order approximation, and the corresponding enhancement factor is obtained. It is found that such a final state interaction offers an important contribution to the decay width near the pp-threshold, although it is not large enough. To explain the decay data, a phenomenological factor G(p) with the form of 285500=(m_π²+p²) should be introduced. A further calculation including the p-dependent bare T-matrix, a more realistic NN potential and the contribution from the higher-order wave functions would provide a better understanding of the decay data and even the existence of the baryonium pp. The near pp-threshold behavior of the decay width in the J=/ψ→π⁰pp process is also discussed.

References

[1]

BAI J Z et al.(BES collaboration). Phys. Rev. Lett, 2003,91: 0220012 Ablikim M et al. (BES0 collaboration). Chin. Phys. C (HEP NP), 2010, 34: 4213 Abe K et al. (Belle collaboration). Phys. Rev. Lett, 2002,88: 1818034 Abe K et al. (Belle collaboration). Phys. Rev. Lett, 2002,89: 1518025 Datta A, J O'Donnell P. Phys. Lett. B, 2003, 567: 2736 Loiseau B, Wycech S. Phys. Rev. C, 2005, 72: 0110017 Kerbikov B, Stavinsky A, Fedotov V. Phys. Rev. C, 2004,69: 0552058 Bugg D V. Phys. Lett. B, 2004, 598: 89 ZOU B S, Chiang H C. Phys. Rev. D, 2004, 69: 03400410 Sibirtsev A, Haidenbauer J, Krewald S et al. Phys. Rev. D,2005, 71: 05401011 Haidenbauer J, Meiβner Ulf-G, Sibirtsev A. Phys. Rev. D,2006, 74: 01750112 Taylor J R. Scattering Theory: The Quantum Theory on Nonrelativistic Collisions. John Wiley and Sons, Inc.13 Watson K M. Phys. Rev, 1952, 88: 116314 Migdal A B. Sov. Phys. JETP, 1955, 1: 2

[1]	Renli Xu , Chen Wu , Jian Liu , Bin Hong , Jie Peng , Xiong Li , Ruxian Zhu , Zhizhen Zhao , Zhongzhou Ren . Ground-state properties of finite nuclei in relativistic Hartree-Bogoliubov theory with an improved quark mass density-dependent model. Chinese Physics C, 2026, 50(2): 1-12.
[2]	. Correlation between Zero-Sound modes and nuclear equation of state stiffness detected by light vector boson. Chinese Physics C, 2026, 50(1): 014101. doi: 10.1088/1674-1137/adfa81
[3]	Yugen Lin , Yu Gao . Dark matter subhalo evaporation by Coulomb-like interaction with galactic gas. Chinese Physics C, 2026, 50(1): 015104. doi: 10.1088/1674-1137/ae07be
[4]	Jialin He , Xinye Peng , Zhongbao Yin , Liang Zheng . Extracting the kinetic freeze-out properties of high energy pp collisions at the LHC with event shape classifiers. Chinese Physics C, 2026, 50(2): 1-16.
[5]	Alim Ruzi , Youpeng Wu , Ran Ding , Qiang Li . Searching Quantum Entanglement in pp → ZZ process. Chinese Physics C, 2026, 50(3): 1-8.
[6]	. Bayesian and Monte Carlo approaches to estimating uncertainty for the measurement of the bound-state β^- decay of ²⁰⁵Tl⁸¹⁺. Chinese Physics C, 2025, 49(11): 114001. doi: 10.1088/1674-1137/ade956
[7]	Yiming Gao , Yoshiki K. Tanaka , Vasyl Drozd , Hiroyuki Ekawa , Samuel Escrig , Yan He , Ayumi Kasagi , Enqiang Liu , Manami Nakagawa , Christophe Rappold , Takehiko R. Saito , Ryohei Sekiya , He Wang , Ayari Yanai , Xiaohong Zhou . Feasibility study of measuring interaction cross sections of hypernuclei produced in projectile fragmentation reactions with WASA-FRS setup. Chinese Physics C, 2025, 49(12): 124003. doi: 10.1088/1674-1137/adf4b2
[8]	Xiaobin Wang , Lei Chang . Unveiling the inner structure of the Pion’s first excited state. Chinese Physics C, 2025, 49(12): 123107. doi: 10.1088/1674-1137/adfc34
[9]	YANG Hong-Xun (for the BESⅡ collaboration) . Partial wave analysis of J/ψ→ppπ⁰ and measurement of J/ψ→ppη, ppη´. Chinese Physics C, 2009, 33(12): 1331-1335. doi: 10.1088/1674-1137/33/12/048
[10]	ZHANG Da-Lin , QIU Sui-Zheng , LIU Chang-Liang , SU Guang-Hui . Steady state investigation on neutronics of a molten salt reactor considering the flow effect of fuel salt. Chinese Physics C, 2008, 32(8): 624-628. doi: 10.1088/1674-1137/32/8/007

Access

Get Citation

ZENG Zhuo-Quan, GUO Xin-Heng, SHEN Peng-Nian and DING Yi-Bing. pp final state interaction in J=/ψ→γpp[J]. Chinese Physics C, 2012, 36(5): 399-402. doi: 10.1088/1674-1137/36/5/004

ZENG Zhuo-Quan, GUO Xin-Heng, SHEN Peng-Nian and DING Yi-Bing. pp final state interaction in J=/ψ→γpp[J]. Chinese Physics C, 2012, 36(5): 399-402. doi: 10.1088/1674-1137/36/5/004 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2011-09-09
Revised: 2011-10-31

Article Metric

Article Views(2782)
PDF Downloads(278)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

pp final state interaction in J=/ψ→γpp

Received Date: 2011-09-09
Accepted Date: 2011-10-31
Available Online: 2012-05-05

Abstract: The phenomenon of the near pp-threshold enhancement observed in the J=/ψ→γpp decay is studied by using the enhancement factor method with a simpler one-pion-exchange potential between p and p. The Jost function caused by the mentioned potential is perturbatively calculated in the zero-th order approximation, and the corresponding enhancement factor is obtained. It is found that such a final state interaction offers an important contribution to the decay width near the pp-threshold, although it is not large enough. To explain the decay data, a phenomenological factor G(p) with the form of 285500=(m_π²+p²) should be introduced. A further calculation including the p-dependent bare T-matrix, a more realistic NN potential and the contribution from the higher-order wave functions would provide a better understanding of the decay data and even the existence of the baryonium pp. The near pp-threshold behavior of the decay width in the J=/ψ→π⁰pp process is also discussed.