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

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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]	Zhang Yang , Liu Lianshou . The Forward-Backward Correlation and Clustered Production of Final-State Particles in High Energy pp Collision. Chinese Physics C, 1994, 18(Z1): 69-78.
[2]	M. Ablikim (BESⅢ collaboration) . Observation of a pp mass threshold enhancement in ψ′→π⁺π^－J/ψ(J/ψ→γpp) decay. Chinese Physics C, 2010, 34(4): 421-426. doi: 10.1088/1674-1137/34/4/001
[3]	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
[4]	GUO Yu-Ping , PING Rong-Gang , XIAO Zhen-Jun . Study of ππ final state interactions in ψ(2S)→π⁺π^－ J/ψ. Chinese Physics C, 2009, 33(4): 245-248. doi: 10.1088/1674-1137/33/4/001
[5]	WANG Mei-Juan , LIU Lian-Shou , WU Yuan-Fang . Trace initial interaction from final state observable in relativistic heavy ion collisions. Chinese Physics C, 2009, 33(1): 36-41. doi: 10.1088/1674-1137/33/1/008
[6]	LIU Xiang , ZENG Xiao-Qiang , DING Yi-Bing , LI Xue-Qian , SHENG Hong , SHEN Peng-Nian . The Linearσ-model and the Observed Enhancement in the Mass Spectrum of pp in J/ψ→γpp. Chinese Physics C, 2006, 30(1): 1-12.
[7]	LIANG Wei-Hong , SHEN Peng-Nian , ZOU Bing-Song . Theoretical Formalism for N* Study via J/ψ→ppω Decay Process. Chinese Physics C, 2002, 26(S1): 93-97.
[8]	LIU Xiao-Hai , ZHANG Yuan-Jiang , ZHAO Qiang . Vector meson rescattering effect in understanding the threshold enhancement observed in J/ψ→γpp. Chinese Physics C, 2010, 34(9): 1402-1404. doi: 10.1088/1674-1137/34/9/054
[9]	Qin Keyu , Jiang Huanqing , Liu Bo . Initial-State Interaction and J/ψ Suppression in High-Energy Proton-Nucleus Collisions. Chinese Physics C, 1996, 20(S4): 359-362.
[10]	LIANG Wei-Hong , SHEN Peng-Nian , ZOU Bing-Song . Covariant Tensor Analysis Method for J/ψ→ppω. Chinese Physics C, 2002, 26(10): 1009-1014.
[11]	Xu Cao , Ju-Jun Xie . Nucleon resonances in πN→η'N and J/ψ→ppη'. Chinese Physics C, 2016, 40(8): 083103. doi: 10.1088/1674-1137/40/8/083103
[12]	Qiang Fu , Xurong Chen . Coherent photoproduction of J/ψ and Υ mesons in pp and PbPb ultraperipheral collisions from dynamical gluon distributions. Chinese Physics C, 2017, 41(11): 114105. doi: 10.1088/1674-1137/41/11/114105
[13]	Wen-Long Yuan , Xiao-Cong Ai , Xiao-Bin Ji , Shen-Jian Chen , Yao Zhang , Ling-Hui Wu , Liang-Liang Wang , Ye Yuan . Study of tracking efficiency and its systematic uncertainty from J/ψ→pp π⁺π^- at BESIII. Chinese Physics C, 2016, 40(2): 026201. doi: 10.1088/1674-1137/40/2/026201
[14]	P. G. Ortega , D. R. Entem , F. Fernandez . ΛΛ production in pp collisions. Chinese Physics C, 2010, 34(9): 1462-1464. doi: 10.1088/1674-1137/34/9/072
[15]	CAO Xu . N^*(1535) contribution in pp→ppη´ and pn→dφ. Chinese Physics C, 2009, 33(12): 1381-1384. doi: 10.1088/1674-1137/33/12/060
[16]	ZOU Bing-Song . Complementary studies on N^* from e⁺e^－, pp and pp collisions. Chinese Physics C, 2009, 33(12): 1113-1119. doi: 10.1088/1674-1137/33/12/011
[17]	R. Aaij , et al (LHCb Collaboration) . Study of the production of Λ_b⁰ and B⁰ hadrons in pp collisions and first measurement of the Λ_b⁰→J/ψpK^- branching fraction. Chinese Physics C, 2016, 40(1): 011001. doi: 10.1088/1674-1137/40/1/011001
[18]	HAN Yun-Cheng , Nobuyuki Chiga , Yu Fujii , Kenta Futatsukawa , Osamu Hashimoto , Kentaro Hirose , Takatsugu Ishikawa , Hiroki Kanda , Masashi Kaneta , Daisuke Kawama , Yue Ma , Kazushige Maeda , Tomofumi Maruta , Nayuta Maruyama , Akihiko Matsumura , Youhei Miyagi , Koji Miwa , Satoshi N , Hajime Shimizu , Koutarou Shirotori , Koutaku Suzuki , Tadaaki Tamae , Hirokazu Tamura , Kyo Tsukada , WANG Tie-Shan , Hirohito Yamazaki . Energy calibration of tagged photons by the d(γ, π^－pp) reaction. Chinese Physics C, 2010, 34(1): 35-38. doi: 10.1088/1674-1137/34/1/006
[19]	WANG Bo-Qun , MO Xiao-Hu , WANG Ping , BAN Yong . Fast computation of observed cross section for ψ'→PP decays. Chinese Physics C, 2011, 35(5): 411-418. doi: 10.1088/1674-1137/35/5/001
[20]	LI De-Min , . Near-threshold η production in pp collisions. Chinese Physics C, 2015, 39(11): 113104. doi: 10.1088/1674-1137/39/11/113104

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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

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

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通讯作者: 陈斌, bchen63@163.com

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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.

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pp final state interaction in J=/ψ→γpp

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