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Ablikim, M.; Ачасов, М. Н.; Ai, X.; Albayrak, O.; Albrecht, M.; Ambrose, D.; An, F. F.; An, Q.; Bai, J. Z.; Ferroli, R. Baldini; Ban, Y.; Bennett, J. V.; Bertani, M.; Bian, J. M.; Boger, E.; Bondarenko, O.; Boyko, I.; Braun, S.; Briere, R. A.; Cai, H.; X, Cai; Çakır, O.; Calcaterra, A.; Cao, G. F.; Çetin, S. A.; Chang, J. F.; Chelkov, G. A.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, S. J.; Chen, X.; Chen, X. R.; Chen, Y. B.; Cheng, H. P.; Chu, X. K.; Chu, Y. P.; Cronin-Hennessy, D.; Dai, H. L.; Dai, J. P.; Dedovich, D. V.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; Ding, W. M.; Ding, Y.; Dong, C.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Du, S. X.; Fan, J.; Fang, J.; Fang, S. S.; Fang, Y.; Fava, L.; Feng, C. Q.; Fu, C. D.; Fuks, O.; Gao, Q.; Gao, Y.; Geng, C.; Goetzen, K.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, Y. H.; Guo, A. Q.; Guo, L. B.; Guo, Tingting; Guo, Y. P.; Han, Y. L.; Harris, F. A.; He, K. L.; He, M.; He, Z. Y.; Held, T.; Heng, Y. K.; Hou, Z. L.; Chen, Hu; Hu, H. M.; Hu, J. F.; Hu, T.; Huang, G. M.; Huang, G. S.; Huang, Hongxia; Huang, J. S.; Huang, L. Q.; Huang, X. T.; Huang, Y.; Hussain, T.; Ji, C. S.; Ji, Q.; Ji, X. B.; Ji, X. L.; Jiang, L. L.; Jiang, L. W.; Jiang, X. S.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Johansson, T.; Kalantar‐Nayestanaki, N.; Kang, X. L.; Kang, X. S.; Kavatsyuk, M.; Kloss, B.; Kopf, B.; Kornicer, M.; Kuehn, W.; Kupść, A.; Lai, W.; Lange, J. S.; Lara, M.; Larin, P.; Leyhe, M.; Li, C. H.; Li, Cheng; Li, Cui; Li, D.; Li, D. M.; Li, F.; Li, G.; Li, H. B.; Li, J. C.; Li, K.; Li, Lei; Li, P. R.; Li, Q. J.; Li, T.; Li, W. D.; Li, W. G.; Li, X. L.; Li, X. N.; Li, X. Q.; Li, Z. B.; Liu, Han; Liang, Y. F.; Liang, Y. T.; Lin, D. X.; Liu, B. J.; Liu, C. L.; Liu, C. X.; Liu, F. H.; Liu, Fang; Liu, Feng; Liu, H. B.; Liu, H. H.; Liu, H. M.; Liu, J.; Liu, J. P.; Liu, K.; Liu, K. Y.; Liu, P. L.; Liu, Q.; Liu, S. B.; Liu, X.; Liu, Y. B.; Liu, Z. A.; Liu, Zhiqiang; Liu, Zhiqing; Loehner, H.; Lou, X.; Lu, G. R.; Lü, H. J.; Lü, H.; Lu, J. G.; Lü, X. R.; Lu, Y. J.; Lu, Y. P.; Luo, C. L.; Luo, M. X.; Luo, T.; Luo, X. L.; Lv, M.; C., F.; L., H.; M., Q.; Ma, Songde; Ma, Tian; Y., X.; Maas, F. E.; Maggiora, M.; Malik, Q. A.; Mao, Y. J.; Mao, Z. P.; Messchendorp, J. G.; Min, J.; Min, T. J.; Mitchell, R. E.; Mo, X. H.; Mo, Y. J.; Moeini, H.; Morales, C. Morales; Moriya, K.; Muchnoi, N. Yu.; Muramatsu, H.; Nefedov, Y.; Nikolaev, I. B.; Ning, Z.; Nisar, S.; Niu, X. Y.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Pelizaeus, M.; Peng, H.; Peters, K.; Ping, J. L.; Ping, R. G.; Poling, R.; Qin, N.; Qi, M.; Qian, S.; Qiao, C. F.; Liu, Qin; Qin, X. S.; Qin, Yao; Qin, Z. H.; Qiu, J. F.; Rashid, K. H.; Redmer, C. F.; Ripka, M.; Rong, G.; Ruan, X. D.; Sarantsev, A.; Schoenning, K.; Schumann, S.; Shan, W.; Shao, M.; Shen, C. P.; Shen, X. Y.; Sheng, H. Y.; Shepherd, M. R.; Song, W. M.; Song, X. Y.; Spataro, S.; Spruck, B.; Sun, G. X.; Sun, J. F.; Sun, S. S.; Sun, Y. J.; Sun, Y. Z.; Sun, Z. J.; Sun, Z. T.; Tang, C. J.; Tang, X.; Tapan, I.; Thorndike, E. H.; Toth, D.; Ullrich, M.; Uman, I.; Varner, G.; Wang, B.; Wang, D.; Wang, K.; Wang, L. L.; Wang, L. S.; Wang, M.; Wang, P.; Wang, P. L.; Wang, Q. J.; Wang, S. G.; Wang, W.; Wang, X. F.; Wang, Y. D.; Wang, Y. F.; Wang, Y. Q.; Wang, Z.; Wang, Z. G.; Wang, Z. H.; Wang, Z. Y.; Wei, D. H.; Wei, J. B.; Weidenkaff, P.; Wen, S. P.; Werner, M.; Wiedner, U.; Wolke, M.; Wu, L. H.; Wu, N.; Wu, Z.; Xia, L.; Xia, Y.; Xiao, D.; Xiao, Z. J.; Xie, Y.; Xiu, Q. L.; Xu, G. F.; Li, Xu; Xu, Q. J.; Xu, Q. N.; Xu, X. P.; Xue, Z.; Yan, L.; Yan, W. B.; Yan, Y. H.; Yang, H. X.; Yang, L.; Yang, Y.; Yang, Yifan; Ye, H.; Ye, M.; Ye, M. H.; Yu, B. X.; Yu, C. X.; Yu, H. W.; Yu, J. S.; Yu, Shiqi; Yuan, C. Z.; Yuan, W. L.; Yuan, Y.; Zafar, A. A.; Zallo, A.; Zang, S. L.; Zeng, Y.; Zhang, B. X.; Zhang, B. Y.; Zhang, C.; Zhang, C. B.; Zhang, C. C.; Zhang, D. H.; Zhang, H. H.; Zhang, H. Y.; Zhang, J. J.; Zhang, J. Q.; Zhang, J. W.; Zhang, J. Y.; Zhang, J. Z.; Zhang, S. H.; Zhang, X. J.; Zhang, X. Y.; Zhang, Y.; Zhang, Y. H.; Zhang, Z. H.; Zhang, Z. P.; Zhang, Z. Y.; Zhao, G.; Zhao, Jiawei; Liu, Zhao; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, S. J.; Zhao, T. C.; Zhao, X.; Zhao, Y. B.; Zhao, Z.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, Y.; Zhong, B.; Li, Zhou; Zhou, Xiang; Zhou, X. K.; Zhou, X. R.; Zhou, X. Y.; Zhu, K.; Zhu, K. J.; Zhu, X.; Zhu, Y.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, J.; Zou, B. S.; Zou, J. H.

doi:10.1103/physrevd.89.052001

Cited by 18 publications

(4 citation statements)

References 21 publications

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“…The LHCb collaboration makes use of the D 0 → a ± 1 π ∓ to study CP violation [45], and it is also feasible to study this mode using the CLEO-c data [46]. The BES-III collaboration has accumulated about 10 7 events of the D 0 and will collect about 3 fb −1 data at the center-of-mass √ s = 4.17 GeV to produce the D + s D − s [47,48]. All these data can be used to study the charm decays into the a 1 .…”

Section: → a 1 Decaysmentioning

confidence: 99%

Production of $$a_1$$ a 1 in heavy meson decays

Wang

Zhao

2016

Eur. Phys. J. C

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In this work, we study various decays of heavy B/D mesons into the a 1 (1260), based on the form factors derived in different nonperturbative or factorization approaches. These decay modes are helpful to explore the dynamics in the heavy to light transitions. Meanwhile they can also provide insights to a newly discovered state, the a 1 (1420) withAvailable theoretical explanations include tetraquark or rescattering effects due to a 1 (1260) decays. If the a 1 (1420) were induced by the rescattering, its production rates are completely determined by those of the a 1 (1260). Our numerical results for decays into the a 1 (1260) indicate that there is a promising prospect to study these decays on experiments including BES-III, LHCb, Babar, Belle, and CLEO-c, the forthcoming Super-KEKB factory and the under-design Circular Electron-Positron Collider.

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Section: → a 1 Decaysmentioning

confidence: 99%

Production of $$a_1$$ a 1 in heavy meson decays

Wang

Zhao

2016

Eur. Phys. J. C

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“…1. The uncertainty due to the efficiency of the charged particles tracking has been investigated with J/ψ → Λ Λ → pπ − pπ + control samples [44], taking into consideration the correlation between the magnitude of charged particle momentum and its polar angle acceptances. Corrections are made based on the 2dimensional distribution of momentum versus polar angle.…”

Section: Systematic Uncertaintymentioning

confidence: 99%

Polarization and Entanglement in Baryon-Antibaryon Pair Production in Electron-Positron Annihilation

Ablikim,

Achasov,

Ahmed

et al. 2018

Preprint

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Using a sample of 1.31 × 10 9 J/ψ events collected with the BESIII detector, we report the first observation of spin polarization of Λ and Λ hyperons from the coherent production in the J/ψ → Λ Λ decay. We measure the phase between the hadronic form factors to be ∆Φ = (42.4 ± 0.6 ± 0.5) • . The decay parameters for Λ → pπ − (α−), Λ → pπ + (α+) and Λ → nπ 0 ( ᾱ0) are measured to be α− = 0.750 ± 0.009 ± 0.004, α+ = −0.758 ± 0.010 ± 0.007 and ᾱ0 = −0.692 ± 0.016 ± 0.006, respectively. The obtained value of α− is higher by (17 ± 3)% than the current world average. In addition, the CP asymmetry ACP = (α− + α+)/(α− − α+) of −0.006 ± 0.012 ± 0.007 is extracted with substantially improved precision. The ratio ᾱ0/α+ = 0.913 ± 0.028 ± 0.012 is also measured.

show abstract

“…The LHCb collaboration makes use of the D 0 → a ± 1 π ∓ to study CP violation [42], and it is also feasible to study this mode using the CLEO-c data [43]. The BES-III collaboration has accumulated about 10 7 events of the D 0 and will collect about 3f b −1 data at the center-of-mass √ s = 4.17 GeV to produce the D + s D − s [44,45]. All these data can be used to study the charm decays into the a 1 .…”

Section: D → A1 Decaysmentioning

confidence: 99%

$a_1(1260), a_1(1420)$ and the production in heavy meson decays

Wang,

Zhao

2015

Preprint

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The a1(1420) with I G (J P C ) = 1 − (1 ++ ) observed in the π + f0(980) final state in the π − p → π + π − π − p process by the COMPASS collaboration seems unlikely to be an ordinary qq mesonic state.Available theoretical explanations include tetraquark or rescattering effects due to a1(1260) decays.If the a1(1420) were induced by the rescattering, its production rates are completely determined by those of the a1(1260). In this work, we propose to explore the ratios of branching fractions of heavy meson weak decays into the a1(1420) and a1(1260), and testing the universality of these ratios would be a straightforward way to validate/invalidate the rescattering explanation. The decay modes include in the charm sector the D 0 → a − 1 ℓ + ν and D 0 → π ± a ∓ 1 , and in the bottom sectorand Λ b → Λca1. We calculate the branching ratios for various decay modes into the a1(1260). The numerical results indicate that there is a promising prospect to study these decays on experiments including BES-III, LHCb, Babar, Belle and CLEOc, the forthcoming Super-KEKB factory and the under-design Circular Electron-Positron Collider.Experimental analyses in future will lead to a deeper understanding of the nature of the a1(1420).

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Amplitude analysis of theD+→KS0π+π

Cited by 18 publications

References 21 publications

Production of $$a_1$$ a 1 in heavy meson decays

Production of $$a_1$$ a 1 in heavy meson decays

Polarization and Entanglement in Baryon-Antibaryon Pair Production in Electron-Positron Annihilation

$a_1(1260), a_1(1420)$ and the production in heavy meson decays

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