Covariant Tensor Formalism for Partial Wave Analyses of ψ Decays into γBB

Sayipjamal Dulat; LIU Bo-Chao; ZOU Bing-Song; WU Ji-Min

Chinese Physics C> 2006, Vol. 30> Issue(4) : 277-283

Covariant Tensor Formalism for Partial Wave Analyses of ψ Decays into γBB

CCAST World Laboratory, Beijing 100080, China2 Institute of High Energy Physics, CAS, Beijing 100049, China3 Department of Physics, Xinjiang University, Urumqi 830046, China4 Graduate School of Chinese Academy of Sciences, Beijing 100049, China

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Recently BESⅡ collaboration observed an enhancement near the pp invariant mass spectrum. Using the covariant tensor formalism, here we provide theoretical formulae for the partial wave analysis (PWA) of the ψ radiative decay channels ψ→γpp, γΛΛ, γ∑∑,γΞΞ. By performing the Monte Carlo simulation, we give the angular distributions for the photon and proton in the process of J/ψ→γ pp, which may serve as a useful reference for the future PWA on these channels.

References

[1]

. Edwards C. PhD Thesis, Cal. Tech. Preprint CALT-68-11652. Coffman D, DeJongh F, Dubois G et al. Phys. Rev., 1990,D41: 14103. Augustin J E et al. Orsay Preprint LAL/85-274. BES Collaboration. Nucl. Phys., 2000, A675: 337—3405. BES Collaboration. Phys. Rev. Lett., 2003, 91: 0220016. Rarita W, Schwinger J. Phys. Rev., 1941, 60: 617. Chung S U. Phys. Rev., 1993, D48: 1225; Chung S U.Phys. Rev., 1998, D57: 4318. Filippini V, Fontana A, Rotondi A. Phys. Rev., 1995, D51:22479. ZOU B S, Bugg D V. Eur. Phys. J., 2003, A16: 53710. BES Collaboration. Phys. Lett., 1998, B440: 21711. BES Collaboration. Phys. Lett., 1999, B446: 35612. BES Collaboration. Phys. Lett., 2000, B472: 20013. BES Collaboration. Phys. Lett., 2000, B472: 20814. BES Collaboration. Phys. Lett., 2000, B476: 2515. BES Collaboration. Phys. Rev., 2003, D68: 05200316. Anisovich V V, Bugg D V, Sarantsev A V. Nucl. Phys.,1992, A537: 501; Anisovich V V, Kobrinsky M N, Me-likhov D I et al. Nucl. Phys., 1992, A544: 74717. Anisovich A V et al. Phys. Lett., 1999, B452: 173; Phys.Lett., 1999, B452: 180; Phys. Lett., 1999, B452: 187;Phys. Lett., 1999, B468: 304; Phys. Lett., 1999, B468:309; Phys. Lett., 2001, B500: 222; Phys. Lett., 2001,B507: 2318. Anisovich A V, Sadovnikova V A. Euro. Phys. J., 1998,A2: 199; Anisovich A V et al. J. Phys., 2002, G28: 1519. Sayipjamal Dulat, ZOU Bing-Song, WU Ji-Min. HEPNP, 2004, 28: 350—358(in Chinese)(沙依甫加马力·达吾来提，邹冰松，吴济民.高能物理与核物理,2004, 28: 350-358)20. Greiner W et al. Quantum Chromodynamics. Springer.2002. 242; Behtends E, Fronsdal C. Phys. Rev., 1957, 106:34521. von Hippel F, Quigg C. Phys. Rev., 1972, D5: 62422. ZOU B S, Hussain F. Phys. Rev., 2003, C67: 01520423. ZOU B S, Chiang H C. Phys. Rev., 2004, D69: 03400424. Kerbikov B, Stavinsky A, Fedotov V. Phys. Rev., 2004,C69: 055205

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Sayipjamal Dulat, LIU Bo-Chao, ZOU Bing-Song, WU Ji-Min and Covariant Tensor Formalism for Partial Wave Analyses of ψ Decays into γBB[J]. Chinese Physics C, 2006, 30(4): 277-283.

Sayipjamal Dulat, LIU Bo-Chao, ZOU Bing-Song, WU Ji-Min and Covariant Tensor Formalism for Partial Wave Analyses of ψ Decays into γBB[J]. Chinese Physics C, 2006, 30(4): 277-283. shu

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Received: 2005-08-25
Revised: 2005-11-28

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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

Covariant Tensor Formalism for Partial Wave Analyses of ψ Decays into γBB

Corresponding author: Sayipjamal Dulat,

Corresponding author: LIU Bo-Chao,

CCAST World Laboratory, Beijing 100080, China2 Institute of High Energy Physics, CAS, Beijing 100049, China3 Department of Physics, Xinjiang University, Urumqi 830046, China4 Graduate School of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2005-08-25

Accepted Date: 2005-11-28

Available Online: 2006-04-05

Abstract: Recently BESⅡ collaboration observed an enhancement near the pp invariant mass spectrum. Using the covariant tensor formalism, here we provide theoretical formulae for the partial wave analysis (PWA) of the ψ radiative decay channels ψ→γpp, γΛΛ, γ∑∑,γΞΞ. By performing the Monte Carlo simulation, we give the angular distributions for the photon and proton in the process of J/ψ→γ pp, which may serve as a useful reference for the future PWA on these channels.

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Covariant Tensor Formalism for Partial Wave Analyses of ψ Decays into γBB

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