-
Abstract
An analysis of the helicity amplitude is performed on the process e+e-→ψ(2S) →γχcJ→γΛ-Λ→γ pπ--pπ+. The joint angular distributions for each decay chain are given, and we focus on discussing the E1 contributions to ψ(2S) radiative decays, and the violation of the helicity selection rule in χcJ decays into hyperon pairs, together with the possibility of observing parity violation in successive hyperon decays. -
References
[1] Karl G, Meshkov S and Rosner J L 1976 Phys. Rev. D 13 1203 Karl G, Meshkov S and Rosner J L 1980 Phys. Rev. Lett.45 215 Novikov V A et al 1978 Phys. Rep. 41 C 1 [2] Geffen D A and Wilson W 1980 Phys. Rev. Lett. 44 370. [3] Chauvat et al 1985 Phys. Lett 163 B 273 Asbyrt et al 1975 Nucl. Phys. B 99 30 [4] Brodsky S J and Lepage G P 1981 Phys. Rev. D 242848 [5] Chen H and Ping R G 2007 Phys. Rev. D 76036005 [6] Ablikim M, et al. (BES Collaboration) 2004 Phys.Rev. D 70 092004 [7] Karl G, Meshkov J and Rosner J L 1976 Phys. Rev. D 13 1203 [8] Particle Data Group 2008 Phys. Lett. B 667 1 [9] Bai J Z et al (BES Collaboration) 2003 Phys. Rev. D 67 112001 -
Related Articles
[1] HOU Hong-Sheng. Charged Top-Pion Production at e+e- and γγ Colliders [J]. Chin. Phys. Lett., 2010, 27(8): 081201. doi: 10.1088/0256-307X/27/8/081201 [2] LI Nan, LU Yuan-Long, XIONG Zhao-Hua, YANG Min. Off-Shell Effect of Quarks in Bs→γe+e- [J]. Chin. Phys. Lett., 2008, 25(11): 3905-3907. [3] CHEN Shao-Hao, WANG Feng, LI Jia-Ming. Theoretical Analysis of Time-Dependent Wave-Packet Dynamics: Proton Impact Excitation (2s - 2p) with Li Atom [J]. Chin. Phys. Lett., 2004, 21(7): 1251-1254. [4] GAO Shou-Ting, ZHANG Heng-De, LU Wei-Song. Ageostrophic Generalized E-P Flux in Baroclinic Atmosphere [J]. Chin. Phys. Lett., 2004, 21(3): 576-579. [5] CHEN Gang, LIU Lian-Shou. Monte Carlo Analysis of the Lévy Stability and Multi-fractal Spectrum in e+e- Collisions [J]. Chin. Phys. Lett., 2002, 19(9): 1271-1273. [6] FAN Xiao-wei, ZHOU Shao-jie, ZHANG Qing-Xiang, ZHANG Wen-xin, PANG Wen-ning, LAI De-shi, WEI Jing-jing, ZHU Wei-bin, WANG Xiao-dong, DENG Jing-kang, WANG Yan, GAO Nai-fei, ZHENG Yen-you, CHEN Xue-jun. The (e, 2e) Spectra of Argon [J]. Chin. Phys. Lett., 1997, 14(9): 660-662. [7] LIU Ximing, Tian Lili. Pseudoscalar Meson Production of γ Resonance in e+e- Annihilation [J]. Chin. Phys. Lett., 1995, 12(11): 645-648. [8] WANG Zhengzhi. e+e- → JETS FOR MULTIPLICITY DISTRIBUTION [J]. Chin. Phys. Lett., 1990, 7(3): 113-116. [9] CHEN E-sheng, WU Qian. RATIO OF CHARMED BARYON TO MESON IN e+e- ANNIHILATION [J]. Chin. Phys. Lett., 1990, 7(3): 109-112. [10] DU Dongsheng, WU Dandi. THE SIGNATURE OF D°-D°MIXING AT AN e+e- COLLIDER IS CLEAN [J]. Chin. Phys. Lett., 1986, 3(9): 389-392.
Impact Factor 2023: 3.5 | CiteScore 2023: 5.9 | Time to First Decision: 28 days
DownLoad: