Study of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi></mml:math> decays to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:mi>Λ</mml:mi><mml:mover accent="true"><mml:mi>Λ</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si3.gif" overflow="scroll"><mml:msup><mml:mi>Σ</m

Ablikim, M.; Bai, J. Z.; Ban, Y.; Bian, J. G.; Cai, X.; Chen, H.F.; Chen, H.S.; Chen, H.X.; Chen, J.C.; Chen, Jin; Chen, Y.B.; Chi, S.; Chu, Y. P.; Cui, X. Z.; Dai, Y. S.; Deng, Z. Y.; Dong, L. Y.; Dong, Qingshun; Du, S. X.; Du, Z. Z.; Fang, J.; Fang, S. S.; Fu, C. D.; Gao, C. S.; Gao, Yang; Gu, S.; Gu, Y. T.; Guo, Y. N.; Guo, Y. Q.; Guo, Z. J.; Harris, F. A.; He, K. L.; He, M.; Heng, Y. K.; Hu, H. M.; Hu, T.; Huang, G. S.; Huang, X. P.; Huang, X. T.; Ji, X. B.; Jiang, X. S.; Jiao, J. B.; Jin, D. P.; Jin, S.; Jin, Y.; Lai, Y. F.; Li, G.; Li, H.B.; Li, H.H.; Li, J.; Li, R.Y.; Li, S.M.; Li, W.D.; Li, W.G.; Li, X.L.; Li, X.Q.; Li, Y.L.; Liang, Y. F.; Liao, H.; Liu, C.X.; Liu, Fengxian; Liu, Fang; Liu, H.H.; Liu, H.M.; Liu, J.; Liu, J.B.; Liu, J.P.; Liu, R.G.; Liu, Z.A.; Lu, F. X.; Lu, G. R.; Lu, H.; Lu, J. G.; Luo, C. L.; Ma, F.C.; Ma, Hailong; Ma, L.; Ma, Qiang; Ma, X.B.; Mao, Z. P.; Mo, X. H.; Nie, J.; Olsen, S. L.; Peng, H.; Qi, N. D.; Qin, H.; Qiu, J. F.; Ren, Z.; Rong, G.; Shan, L. Y.; Shang, L.; Shen, D. L.; Shen, X. Y.; Sheng, H. Y.; Shi, Feng; Shi, X.; Sun, H.; Sun, J. F.; Sun, S. S.; Sun, Yang; Sun, Zhi‐Wei; Tan, Zhengguo; Tang, X.; Tian, Yang; Tong, G. L.; Varner, G.; Wang, D.Y.; Wang, L.; Wang, L.S.; Wang, M.; Wang, P.; Wang, P.L.; Wang, W.F.; Wang, Y.F.; Wang, Z.; Wang, Z.Y.; Wang, Zhe; Wang, Zheng; Wei, C.; Wei, D. H.; Wu, N.; Xia, X. M.; Xie, X. X.; Xin, B.; Xu, G. F.; Xu, Y.; Yan, Mu-Lin; Yang, F.; Yang, H. X.; Yang, Jian; Yang, Yifan; Ye, M.H.; Ye, Y.X.; Yi, Z. Y.; Yu, G.; Yuan, C. Z.; Yuan, J. M.; Yuan, Y.; Zang, S. L.; Zeng, Y.; Zhang, B.X.; Zhang, B.Y.; Zhang, C.C.; Zhang, D.H.; Zhang, H.Y.; Zhang, J.W.; Zhang, J.Y.; Zhang, Q.J.; Zhang, X.M.; Zhang, X.Y.; Zhang, Yiyun; Zhang, Z.P.; Zhang, Z.Q.; Zhao, Dongxu; Zhao, J. W.; Zhao, M. G.; Zhao, P. P.; Zhao, W. R.; Zhao, Z. G.; Zheng, H. Q.; Zheng, J. P.; Zheng, Z. P.; Li, Zhou; Zhou, Na; Zhu, K. J.; Zhu, Q. M.; Zhu, Y. S.; Zhu, Y.; Zhu, Z. A.; Zhuang, B. A.; Zhuang, X.; Zou, B. S.

doi:10.1016/j.physletb.2005.10.079

Cited by 34 publications

(20 citation statements)

References 12 publications

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“…The world average value of α = 0.65 ± 0.10 [14,15,16]. The distribution for J/ψ → ΛΛ decay in the present experiment is shown in Fig.…”

Section: Angular Distributions Formentioning

confidence: 54%

See 1 more Smart Citation

Study ofe+e−→ΛΛ¯,Λ
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
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128
3
59
0
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We study the e + e − → ΛΛγ, ΛΣ 0 γ, Σ 0 Σ 0 γ processes using 230 fb −1 of integrated luminosity collected by the BABAR detector at e + e − center-of-mass energy of 10.58 GeV. From the analysis of the baryon-antibaryon mass spectra the cross sections for e + e − → ΛΛ, ΛΣ 0 , Σ 0 Σ 0 are measured in the dibaryon mass range from threshold up to 3 GeV/c 2 . The ratio of electric and magnetic form factors, |GE/GM |, is measured for e + e − → ΛΛ, and limits on the relative phase between Λ form factors are obtained. We also measure the J/ψ → ΛΛ, Σ 0 Σ 0 and ψ(2S) → ΛΛ branching fractions.

show abstract

“…The world average value of α = 0.65 ± 0.10 [14,15,16]. The distribution for J/ψ → ΛΛ decay in the present experiment is shown in Fig.…”

Section: Angular Distributions Formentioning

confidence: 54%

“…The event generator uses the experimental data for the angular distribution of the Λ in J/ψ → ΛΛ decay. This distribution is described by 1 + α cos 2 θ with α = 0.65 ± 0.010 [14,15,16]. For the ψ(2S) the value α = 0.69 predicted in [21] is used.…”

Section: +34mentioning

confidence: 99%

Study ofe+e−→ΛΛ¯,Λ
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
Self Cite
128
3
59
0
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show abstract

“…Experimental efforts are useful to measure α in order to test the hadron helicity conservation rule and study the validity of the various theoretical approaches. In the previous experiments, the angular distributions are measured with a few decays, such as ψ(3686) → pp [12] and J/ψ → BB (pp, ΛΛ, Σ 0Σ0 , Ξ −Ξ+ , Σ(1385)Σ(1385)) [8,[13][14][15]. Among them, the angular distributions for the J/ψ → Ξ −Ξ+ , Σ(1385) ∓Σ (1385) ± decays are determined with a low precision, while for the decays ψ(3686) → Ξ −Ξ+ , Σ(1385) ∓Σ (1385) ± have not yet been measured.…”

Section: B(ψ(3686) → Hadrons)mentioning

confidence: 99%

Study ofψdecays to theΞ−Ξ¯+and
Ablikim¹,
Ачасов²,
Ai³
et al. 2016
Phys. Rev. D
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42
2
20
0
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“…The branching fractions of J/ψ and ψ ′ decays into BB have been systematically studied in the framework of pQCD [1,3]. The angular distributions of e + e − → J/ψ, ψ ′ → B 8B8 (B 8 : octet baryon), were also investigated theoretically and experimentally by many groups [8,9,10,11,12]. For J/ψ produced from e + e − annihilation, they must have spin ±1 along the beam direction.…”

Section: Introductionmentioning

confidence: 99%

“…For exclusive decays of J/ψ into octet baryonic pair, the outgoing BB can be taken either S-wave or Dwave state in laboratory system, thus the experimental observation of the outgoing baryon direction takes the form dN/d cos θ ∝ (1 + α cos 2 θ), where θ is the angle between outgoing baryon direction and e + e − beam direction. The angular distribution parameters of α have been measured by many groups [10,11,12]. Recently, the BES collaboration have released a more accurate measurement on the parameter α for J/ψ → pp, ΛΛ and Σ 0Σ0 decays with 58 million J/ψ events accumulated at BEPC as shown in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Rescattering effects of baryon and antibaryon in heavy quarkonium decays

Chen

Ping

2007

Physics Letters B

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Rescattering effects of baryon and antibaryon in heavy quarkonium decays are investigated by studying their angular distributions. The rescattering amplitudes are phenomenologically evaluated by modeling the intermediate range interaction as a σ or pion meson exchange between qq quarks. The results show that the rescattering effects play an important role in determination of the angular distribution in heavy quarkonium decays. Especially, for J/ψ and ψ(2S) decays into ΛΛ, Σ 0Σ0 and Ξ −Ξ+ the angular distribution parameters could turn to be negative values in the limit of helicity conservation. These results provide us a possible explanation for understanding the negative sign of the angular distribution parameter measured for J/ψ → Σ 0Σ0 , namely, it might come from the baryonic SU(3) F symmetry breaking by incorporating rescattering effects.

show abstract

Study of the J/ψ decays to ΛΛ¯ and Σ

Cited by 34 publications

References 12 publications

Study ofe+e−→ΛΛ¯,Λ
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
Self Cite
128
3
59
0
View full text Add to dashboard Cite

Study ofe+e−→ΛΛ¯,Λ
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
Self Cite
128
3
59
0
View full text Add to dashboard Cite

Study ofψdecays to theΞ−Ξ¯+and
Ablikim¹,
Ачасов²,
Ai³
et al. 2016
Phys. Rev. D
Self Cite
42
2
20
0
View full text Add to dashboard Cite

Rescattering effects of baryon and antibaryon in heavy quarkonium decays

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Study of the J/ψ decays to ΛΛ¯ and Σ

Cited by 34 publications

References 12 publications

Study ofe+e−→ΛΛ¯,ΛAubert1, Bóna2, Boutigny3 et al. 2007Phys. Rev. DSelf Cite1283590View full textAdd to dashboardCite

Study ofe+e−→ΛΛ¯,ΛAubert1, Bóna2, Boutigny3 et al. 2007Phys. Rev. DSelf Cite1283590View full textAdd to dashboardCite

Study ofψdecays to theΞ−Ξ¯+andAblikim1, Ачасов2, Ai3 et al. 2016Phys. Rev. DSelf Cite422200View full textAdd to dashboardCite

Rescattering effects of baryon and antibaryon in heavy quarkonium decays

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About

Study ofe+e−→ΛΛ¯,Λ
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
Self Cite
128
3
59
0
View full text Add to dashboard Cite

Study ofe+e−→ΛΛ¯,Λ
Aubert¹,
Bóna²,
Boutigny³
et al. 2007
Phys. Rev. D
Self Cite
128
3
59
0
View full text Add to dashboard Cite

Study ofψdecays to theΞ−Ξ¯+and
Ablikim¹,
Ачасов²,
Ai³
et al. 2016
Phys. Rev. D
Self Cite
42
2
20
0
View full text Add to dashboard Cite