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1. Observation of two new N* resonances in the decay ψ(3686)→ppπ0

Author

M, Ablikim, M N, Achasov, D J, Ambrose, F F, An, Q, An, Z H, An, J Z, Bai, Y, Ban, J, Becker, N, Berger, M, Bertani, J M, Bian, E, Boger, O, Bondarenko, I, Boyko, R A, Briere, V, Bytev, X, Cai, A, Calcaterra, G F, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, A, Denig, I, Denysenko, M, Destefanis, W M, Ding, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, J, Fang, S S, Fang, L, Fava, F, Feldbauer, C Q, Feng, R B, Ferroli, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, W, Gradl, M, Greco, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, Y L, Han, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, T, Held, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, N, Kalantar-Nayestanaki, M, Kavatsyuk, W, Kühn, W, Lai, J S, Lange, J K C, Leung, C H, Li, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, K, Li, Lei, Li, N B, Li, Q J, Li, S L, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, H, Liu, H B, Liu, H H, Liu, H M, Liu, H W, Liu, J P, Liu, K Y, Liu, Kai, Liu, Kun, Liu, P L, Liu, S B, Liu, X, Liu, X H, Liu, Y, Liu, Y B, Liu, Z A, Liu, Zhiqiang, Liu, Zhiqing, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, M, Lv, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, S, Ma, T, Ma, X Y, Ma, Y, Ma, F E, Maas, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, T J, Min, R E, Mitchell, X H, Mo, C, Morales Morales, C, Motzko, N Yu, Muchnoi, Y, Nefedov, C, Nicholson, I B, Nikolaev, Z, Ning, S L, Olsen, Q, Ouyang, S, Pacetti, J W, Park, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, E, Prencipe, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, Y, Qin, Z H, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, E H, Thorndike, H L, Tian, D, Toth, M, Ullrich, G S, Varner, B, Wang, B Q, Wang, J X, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, Q J, Wang, S G, Wang, X F, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, P, Weidenkaff, Q G, Wen, S P, Wen, M, Werner, U, Wiedner, L H, Wu, N, Wu, S X, Wu, W, Wu, Z, Wu, L G, Xia, Z J, Xiao, Y G, Xie, Q L, Xiu, G F, Xu, G M, Xu, H, Xu, Q J, Xu, X P, Xu, Y, Xu, Z R, Xu, F, Xue, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, T, Yang, Y, Yang, Y X, Yang, H, Ye, M, Ye, M H, Ye, B X, Yu, C X, Yu, J S, Yu, S P, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J G, Zhang, J Q, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Y S, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, J W, Zhao, K X, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y M, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, and J X, Zuo

Abstract

Based on 106×10(6)ψ(3686) events collected with the BESIII detector at the BEPCII facility, a partial wave analysis of ψ(3686)→ppπ0 is performed. The branching fraction of this channel has been determined to be B(ψ(3686)→ppπ0)=(1.65±0.03±0.15)×10(-4). In this decay, 7 N* intermediate resonances are observed. Among these, two new resonances, N(2300) and N(2570) are significant, one 1/2+ resonance with a mass of 2300(-30-0)(+40+109) MeV/c2 and width of 340(-30-58)(+30+110) MeV/c2, and one 5/2- resonance with a mass of 2570(-10-10)(+19+34) MeV/c2 and width of 250(-24-21)(+14+69) MeV/c2. For the remaining 5 N* intermediate resonances [N(1440), N(1520), N(1535), N(1650) and N(1720)], the analysis yields mass and width values that are consistent with those from established resonances.

Published
2012

2. Evidence for the direct two-photon transition from ψ(3686) to J/ψ

Author

M, Ablikim, M N, Achasov, D J, Ambrose, F F, An, Q, An, Z H, An, J Z, Bai, R B, Ferroli, Y, Ban, J, Becker, N, Berger, M B, Bertani, J M, Bian, E, Boger, O, Bondarenko, I, Boyko, R A, Briere, V, Bytev, X, Cai, A C, Calcaterra, G F, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, A, Denig, I, Denysenko, M, Destefanis, W M, Ding, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, J, Fang, S S, Fang, L, Fava, F, Feldbauer, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, W, Gradl, M, Greco, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, Y L, Han, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, T, Held, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, N, Kalantar-Nayestanaki, M, Kavatsyuk, W, Kuehn, W, Lai, J S, Lange, J K C, Leung, C H, Li, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, K, Li, Lei, Li, N B, Li, Q J, Li, S L, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, H, Liu, H B, Liu, H H, Liu, H M, Liu, H W, Liu, J P, Liu, Kun, Liu, Kai, Liu, K Y, Liu, P L, Liu, S B, Liu, X, Liu, X H, Liu, Y B, Liu, Y, Liu, Z A, Liu, Zhiqiang, Liu, Zhiqing, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, M, Lv, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, S, Ma, T, Ma, X Y, Ma, Y, Ma, F E, Maas, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, T J, Min, R E, Mitchell, X H, Mo, C, Morales Morales, C, Motzko, N Yu, Muchnoi, Y, Nefedov, C, Nicholson, I B, Nikolaev, Z, Ning, S L, Olsen, Q, Ouyang, S P, Pacetti, J W, Park, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, E, Prencipe, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, Y, Qin, Z H, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, E H, Thorndike, H L, Tian, D, Toth, M U, Ulrich, G S, Varner, B, Wang, B Q, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, Q J, Wang, S G, Wang, X F, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, P, Weidenkaff, Q G, Wen, S P, Wen, M W, Werner, U, Wiedner, L H, Wu, N, Wu, S X, Wu, W, Wu, Z, Wu, L G, Xia, Z J, Xiao, Y G, Xie, Q L, Xiu, G F, Xu, G M, Xu, H, Xu, Q J, Xu, X P, Xu, Y, Xu, Z R, Xu, F, Xue, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, T, Yang, Y, Yang, Y X, Yang, H, Ye, M, Ye, M H, Ye, B X, Yu, C X, Yu, J S, Yu, S P, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A Z, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J G, Zhang, J Q, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Y S, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, J W, Zhao, K X, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y M, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, and J X, Zuo

Subjects
Physics, Particle physics, Branching fraction, Electron–positron annihilation, General Physics and Astronomy
Abstract

The two-photon transition ψ(3686)→γγJ/ψ is studied in a sample of 1.06×10(8) ψ(3686) decays collected by the BESIII detector. The branching fraction is measured to be (3.1±0.6(stat)(-1.0)(+0.8)(syst))×10(-4) using J/ψ→e(+)e(-) and J/ψ→μ(+)μ(-) decays, and its upper limit is estimated to be 4.5×10(-4) at the 90% confidence level. This work represents the first measurement of a two-photon transition among charmonium states. The orientation of the ψ(3686) decay plane and the J/ψ polarization in this decay are also studied. In addition, the product branching fractions of sequential E1 transitions ψ(3686)→γχ(cJ) and χ(cJ)→γJ/ψ(J=0,1,2) are reported.

Published
2012

3. ηπ+ π- resonant structure around 1.8 GeV/c(2) and η(1405) in J/ψ → ωηπ+ π

Author

M, Ablikim, M N, Achasov, D, Alberto, Q, An, Z H, An, J Z, Bai, R, Baldini, Y, Ban, J, Becker, N, Berger, M, Bertani, J M, Bian, O, Bondarenko, I, Boyko, R A, Briere, V, Bytev, X, Cai, A C, Calcaterra, G F, Cao, X X, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, I, Denysenko, M, Destefanis, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, R R, Fan, J, Fang, S S, Fang, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, M, Greco, S, Grishin, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, N, Kalantar-Nayestanaki, M, Kavatsyuk, S, Komamiya, W, Kuehn, J S, Lange, J K C, Leung, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, K, Li, Lei, Li, N B, Li, Q J, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, G C, Liu, H, Liu, H B, Liu, H H, Liu, H M, Liu, H W, Liu, J P, Liu, K, Liu, K Y, Liu, Q, Liu, S B, Liu, X, Liu, X H, Liu, Y B, Liu, Y W, Liu, Yong, Liu, Z A, Liu, Z Q, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, T, Ma, X, Ma, X Y, Ma, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, R E, Mitchell, X H, Mo, N Yu, Muchnoi, Y, Nefedov, I B, Nikolaev, Z, Ning, S L, Olsen, Q, Ouyang, S, Pacetti, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Sonoda, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, H L, Tian, D, Toth, G S, Varner, X, Wan, B Q, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, S G, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, Q G, Wen, S P, Wen, U, Wiedner, L H, Wu, N, Wu, W, Wu, Z, Wu, Z J, Xiao, Y G, Xie, G F, Xu, G M, Xu, H, Xu, Q J, Xu, X P, Xu, Y, Xu, Z R, Xu, Z Z, Xu, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, M, Yang, T, Yang, Y, Yang, Y X, Yang, M, Ye, M H, Ye, B X, Yu, C X, Yu, L, Yu, S P Yu, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, Z L, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, and J X, Zuo

Abstract

We present results of a study of the decay J/ψ → ωηπ+ π- using a sample of (225.2 ± 2.8) × 10(6) J/ψ events collected by the BESIII detector, and report the observation of a new process J/ψ → ωX(1870) with a statistical significance of 7.2σ, in which X(1870) decays to a(0)(±)(980)π±. Fitting to ηπ+ π- mass spectrum yields a mass M = 1877.3 ± 6.3(stat)(-7.4)(+3.4)(syst) MeV/c(2), a width Γ = 57 ± 12(stat)(-4)(+19)(syst) MeV/c(2), and a product branching fraction B(J/ψ → ωX) × B(X→a(0)(±)(980)π±) × B(a(0) (±)(980) → ηπ±) = [1.50 ± 0.26(stat)(-0.36)(+0.72) (syst)] × 10(-4). Signals for J/ψ → ωf(1)(1285) and J/ψ → ω η(1405) are also clearly observed and measured.

Published
2011

4. Observation of χ(c1) decays into vector meson pairs φφ, ωω, and ωφ

Author

M, Ablikim, M N, Achasov, L, An, Q, An, Z H, An, J Z, Bai, R, Baldini, Y, Ban, J, Becker, N, Berger, M, Bertani, J M, Bian, O, Bondarenko, I, Boyko, R A, Briere, V, Bytev, X, Cai, G F, Cao, X X, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, M L, Chen, S J, Chen, Y, Chen, Y B, Chen, H P, Cheng, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, I, Denysenko, M, Destefanis, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, M Y, Duan, R R, Fan, J, Fang, S S, Fang, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, M, Greco, S, Grishin, M H, Gu, Y T, Gu, Y H, Guan, A Q, Guo, L B, Guo, Y P, Guo, X Q, Hao, F A, Harris, K L, He, M, He, Z Y, He, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, T, Hussain, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, Z, Jiao, D P, Jin, S, Jin, F F, Jing, M, Kavatsyuk, S, Komamiya, W, Kuehn, J S, Lange, J K C, Leung, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J C, Li, Lei, Li, N B, Li, Q J, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Z B, Li, H, Liang, Y F, Liang, Y T, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, G C, Liu, H, Liu, H B, Liu, H M, Liu, H W, Liu, J P, Liu, K, Liu, K Y, Liu, Q, Liu, S B, Liu, X, Liu, X H, Liu, Y B, Liu, Y W, Liu, Yong, Liu, Z A, Liu, Z Q, Liu, H, Loehner, G R, Lu, H J, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, T, Ma, X, Ma, X Y, Ma, M, Maggiora, Q A, Malik, H, Mao, Y J, Mao, Z P, Mao, J G, Messchendorp, J, Min, R E, Mitchell, X H, Mo, N Yu, Muchnoi, Y, Nefedov, Z, Ning, S L, Olsen, Q, Ouyang, S, Pacetti, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, C S J, Pun, M, Qi, S, Qian, C F, Qiao, X S, Qin, J F, Qiu, K H, Rashid, G, Rong, X D, Ruan, A, Sarantsev, J, Schulze, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, M R, Shepherd, X Y, Song, S, Sonoda, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, X F, Tang, H L, Tian, D, Toth, G S, Varner, X, Wan, B Q, Wang, K, Wang, L L, Wang, L S, Wang, M, Wang, P, Wang, P L, Wang, Q, Wang, S G, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, Q G, Wen, S P, Wen, U, Wiedner, L H, Wu, N, Wu, W, Wu, Z, Wu, Z J, Xiao, Y G, Xie, G F, Xu, G M, Xu, H, Xu, Y, Xu, Z R, Xu, Z Z, Xu, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, M, Yang, T, Yang, Y, Yang, Y X, Yang, M, Ye, M H, Ye, B X, Yu, C X, Yu, L, Yu, C Z, Yuan, W L, Yuan, Y, Yuan, A A, Zafar, A, Zallo, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, T R, Zhang, X J, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Z P, Zhang, Z Y, Zhang, G, Zhao, H S, Zhao, Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, Z L, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhong, L, Zhou, X K, Zhou, X R, Zhou, C, Zhu, K, Zhu, K J, Zhu, S H, Zhu, X L, Zhu, X W, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, J X, Zuo, and P, Zweber

Abstract

Using (106±4)×10⁻⁶ ψ(3686) events accumulated with the BESIII detector at the BEPCII e⁺e⁻ collider, we present the first measurement of decays of χ(c1) to vector meson pairs φφ, ωω, and ωφ. The branching fractions are measured to be (4.4±0.3±0.5)×10⁻⁴, (6.0±0.3±0.7)×10⁻⁴, and (2.2±0.6±0.2)×10⁻⁵, for χ(c1)→φφ, ωω, and ωφ, respectively, which indicates that the hadron helicity selection rule is significantly violated in χ(cJ) decays. In addition, the measurement of χ(cJ)→ωφ provides the first indication of the rate of doubly OZI-suppressed χ(cJ) decay. Finally, we present improved measurements for the branching fractions of χ(c0) and χ(c2) to vector meson pairs.

Published
2011

5. Evidence forψ′Decays intoγπ0andγη

Author

M. Ablikim, M. N. Achasov, L. An, Q. An, Z. H. An, J. Z. Bai, R. Baldini, Y. Ban, J. Becker, N. Berger, M. Bertani, J. M. Bian, I. Boyko, R. A. Briere, V. Bytev, X. Cai, G. F. Cao, X. X. Cao, J. F. Chang, G. Chelkov, G. Chen, H. S. Chen, J. C. Chen, M. L. Chen, S. J. Chen, Y. Chen, Y. B. Chen, H. P. Cheng, Y. P. Chu, D. Cronin-Hennessy, H. L. Dai, J. P. Dai, D. Dedovich, Z. Y. Deng, I. Denysenko, M. Destefanis, Y. Ding, L. Y. Dong, M. Y. Dong, S. X. Du, M. Y. Duan, R. R. Fan, J. Fang, S. S. Fang, F. Feldbauer, C. Q. Feng, C. D. Fu, J. L. Fu, Y. Gao, C. Geng, K. Goetzen, W. X. Gong, M. Greco, S. Grishin, M. H. Gu, Y. T. Gu, Y. H. Guan, A. Q. Guo, L. B. Guo, Y. P. Guo, X. Q. Hao, F. A. Harris, K. L. He, M. He, Z. Y. He, Y. K. Heng, Z. L. Hou, H. M. Hu, J. F. Hu, T. Hu, B. Huang, G. M. Huang, J. S. Huang, X. T. Huang, Y. P. Huang, T. Hussain, C. S. Ji, Q. Ji, X. B. Ji, X. L. Ji, L. K. Jia, L. L. Jiang, X. S. Jiang, J. B. Jiao, Z. Jiao, D. P. Jin, S. Jin, F. F. Jing, M. Kavatsyuk, S. Komamiya, W. Kuehn, J. S. Lange, J. K. C. Leung, Cheng Li, Cui Li, D. M. Li, F. Li, G. Li, H. B. Li, J. C. Li, Lei Li, N. B. Li, Q. J. Li, W. D. Li, W. G. Li, X. L. Li, X. N. Li, X. Q. Li, X. R. Li, Z. B. Li, H. Liang, Y. F. Liang, Y. T. Liang, G. R. Liao, X. T. Liao, B. J. Liu, C. L. Liu, C. X. Liu, C. Y. Liu, F. H. Liu, Fang Liu, Feng Liu, G. C. Liu, H. Liu, H. B. Liu, H. M. Liu, H. W. Liu, J. P. Liu, K. Liu, K. Y. Liu, Q. Liu, S. B. Liu, X. H. Liu, Y. B. Liu, Y. W. Liu, Yong Liu, Z. A. Liu, Z. Q. Liu, H. Loehner, G. R. Lu, H. J. Lu, J. G. Lu, Q. W. Lu, X. R. Lu, Y. P. Lu, C. L. Luo, M. X. Luo, T. Luo, X. L. Luo, C. L. Ma, F. C. Ma, H. L. Ma, Q. M. Ma, T. Ma, X. Ma, X. Y. Ma, M. Maggiora, Q. A. Malik, H. Mao, Y. J. Mao, Z. P. Mao, J. G. Messchendorp, J. Min, R. E. Mitchell, X. H. Mo, C. Motzko, N. Yu. Muchnoi, Y. Nefedov, Z. Ning, S. L. Olsen, Q. Ouyang, S. Pacetti, M. Pelizaeus, K. Peters, J. L. Ping, R. G. Ping, R. Poling, C. S. J. Pun, M. Qi, S. Qian, C. F. Qiao, X. S. Qin, J. F. Qiu, K. H. Rashid, G. Rong, X. D. Ruan, A. Sarantsev, J. Schulze, M. Shao, C. P. Shen, X. Y. Shen, H. Y. Sheng, M. R. Shepherd, X. Y. Song, S. Sonoda, S. Spataro, B. Spruck, D. H. Sun, G. X. Sun, J. F. Sun, S. S. Sun, X. D. Sun, Y. J. Sun, Y. Z. Sun, Z. J. Sun, Z. T. Sun, C. J. Tang, X. Tang, X. F. Tang, H. L. Tian, D. Toth, G. S. Varner, X. Wan, B. Q. Wang, K. Wang, L. L. Wang, L. S. Wang, P. Wang, P. L. Wang, Q. Wang, S. G. Wang, X. L. Wang, Y. D. Wang, Y. F. Wang, Y. Q. Wang, Z. Wang, Z. G. Wang, Z. Y. Wang, D. H. Wei, S. P. Wen, U. Wiedner, L. H. Wu, N. Wu, W. Wu, Z. Wu, Z. J. Xiao, Y. G. Xie, G. F. Xu, G. M. Xu, H. Xu, Y. Xu, Z. R. Xu, Z. Z. Xu, Z. Xue, L. Yan, W. B. Yan, Y. H. Yan, H. X. Yang, M. Yang, T. Yang, Y. Yang, Y. X. Yang, M. Ye, M. H. Ye, B. X. Yu, C. X. Yu, L. Yu, C. Z. Yuan, W. L. Yuan, Y. Yuan, A. A. Zafar, A. Zallo, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. H. Zhang, H. Y. Zhang, J. Zhang, J. W. Zhang, J. Y. Zhang, J. Z. Zhang, L. Zhang, S. H. Zhang, T. R. Zhang, X. J. Zhang, X. Y. Zhang, Y. Zhang, Y. H. Zhang, Z. P. Zhang, Z. Y. Zhang, G. Zhao, H. S. Zhao, Jiawei Zhao, Jingwei Zhao, Lei Zhao, Ling Zhao, M. G. Zhao, Q. Zhao, S. J. Zhao, T. C. Zhao, X. H. Zhao, Y. B. Zhao, Z. G. Zhao, Z. L. Zhao, A. Zhemchugov, B. Zheng, J. P. Zheng, Y. H. Zheng, Z. P. Zheng, B. Zhong, J. Zhong, L. Zhong, L. Zhou, X. K. Zhou, X. R. Zhou, C. Zhu, K. Zhu, K. J. Zhu, S. H. Zhu, X. L. Zhu, X. W. Zhu, Y. S. Zhu, Z. A. Zhu, J. Zhuang, B. S. Zou, J. H. Zou, J. X. Zuo, and P. Zweber

Subjects
Physics, General Physics and Astronomy
Published
2010
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6. Measurements of h(c)(1P(1)) in psi' decays

Author

M, Ablikim, M N, Achasov, L, An, Q, An, Z H, An, J Z, Bai, Y, Ban, N, Berger, J M, Bian, I, Boyko, R A, Briere, V, Bytev, X, Cai, G F, Cao, X X, Cao, J F, Chang, G, Chelkov, G, Chen, H S, Chen, J C, Chen, L P, Chen, M L, Chen, P, Chen, S J, Chen, Y B, Chen, Y P, Chu, D, Cronin-Hennessy, H L, Dai, J P, Dai, D, Dedovich, Z Y, Deng, I, Denysenko, M, Destefanis, Y, Ding, L Y, Dong, M Y, Dong, S X, Du, M Y, Duan, J, Fang, C Q, Feng, C D, Fu, J L, Fu, Y, Gao, C, Geng, K, Goetzen, W X, Gong, M, Greco, S, Grishin, Y T, Gu, A Q, Guo, L B, Guo, Y P, Guo, S Q, Han, F A, Harris, K L, He, M, He, Z Y, He, Y K, Heng, Z L, Hou, H M, Hu, J F, Hu, T, Hu, X W, Hu, B, Huang, G M, Huang, J S, Huang, X T, Huang, Y P, Huang, C S, Ji, Q, Ji, X B, Ji, X L, Ji, L K, Jia, L L, Jiang, X S, Jiang, J B, Jiao, D P, Jin, S, Jin, S, Komamiya, W, Kuehn, S, Lange, J K C, Leung, Cheng, Li, Cui, Li, D M, Li, F, Li, G, Li, H B, Li, J, Li, J C, Li, Lei, Li, Lu, Li, Q J, Li, W D, Li, W G, Li, X L, Li, X N, Li, X Q, Li, X R, Li, Y X, Li, Z B, Li, H, Liang, T R, Liang, Y T, Liang, Y F, Liang, G R, Liao, X T, Liao, B J, Liu, C L, Liu, C X, Liu, C Y, Liu, F H, Liu, Fang, Liu, Feng, Liu, G C, Liu, H, Liu, H B, Liu, H M, Liu, H W, Liu, J, Liu, J P, Liu, K, Liu, K Y, Liu, Q, Liu, S B, Liu, X H, Liu, Y B, Liu, Y F, Liu, Y W, Liu, Yong, Liu, Z A, Liu, G R, Lu, J G, Lu, Q W, Lu, X R, Lu, Y P, Lu, C L, Luo, M X, Luo, T, Luo, X L, Luo, C L, Ma, F C, Ma, H L, Ma, Q M, Ma, X, Ma, X Y, Ma, M, Maggiora, Y J, Mao, Z P, Mao, J, Min, X H, Mo, N Yu, Muchnoi, Y, Nefedov, F P, Ning, S L, Olsen, Q, Ouyang, M, Pelizaeus, K, Peters, J L, Ping, R G, Ping, R, Poling, C S J, Pun, M, Qi, S, Qian, C F, Qiao, J F, Qiu, G, Rong, X D, Ruan, A, Sarantsev, M, Shao, C P, Shen, X Y, Shen, H Y, Sheng, S, Sonoda, S, Spataro, B, Spruck, D H, Sun, G X, Sun, J F, Sun, S S, Sun, X D, Sun, Y J, Sun, Y Z, Sun, Z J, Sun, Z T, Sun, C J, Tang, X, Tang, X F, Tang, H L, Tian, D, Toth, G S, Varner, X, Wan, B Q, Wang, J K, Wang, K, Wang, L L, Wang, L S, Wang, P, Wang, P L, Wang, Q, Wang, S G, Wang, X D, Wang, X L, Wang, Y D, Wang, Y F, Wang, Y Q, Wang, Z, Wang, Z G, Wang, Z Y, Wang, D H, Wei, S P, Wen, U, Wiedner, L H, Wu, N, Wu, W, Wu, Y M, Wu, Z, Wu, Z J, Xiao, Y G, Xie, G F, Xu, G M, Xu, H, Xu, Min, Xu, Ming, Xu, X P, Xu, Y, Xu, Z Z, Xu, Z, Xue, L, Yan, W B, Yan, Y H, Yan, H X, Yang, M, Yang, P, Yang, S M, Yang, Y X, Yang, M, Ye, M H, Ye, B X, Yu, C X, Yu, L, Yu, C Z, Yuan, Y, Yuan, Y, Zeng, B X, Zhang, B Y, Zhang, C C, Zhang, D H, Zhang, H H, Zhang, H Y, Zhang, J W, Zhang, J Y, Zhang, J Z, Zhang, L, Zhang, S H, Zhang, X Y, Zhang, Y, Zhang, Y H, Zhang, Z P, Zhang, C, Zhao, H S, Zhao, Jiawei, Zhao, Jingwei, Zhao, Lei, Zhao, Ling, Zhao, M G, Zhao, Q, Zhao, S J, Zhao, T C, Zhao, X H, Zhao, Y B, Zhao, Z G, Zhao, A, Zhemchugov, B, Zheng, J P, Zheng, Y H, Zheng, Z P, Zheng, B, Zhong, J, Zhong, L, Zhou, Z L, Zhou, C, Zhu, K, Zhu, K J, Zhu, Q M, Zhu, X W, Zhu, Y S, Zhu, Z A, Zhu, J, Zhuang, B S, Zou, J H, Zou, J X, Zuo, and P, Zweber

Abstract

We present measurements of the charmonium state h(c)(1P(1)) made with 106x10(6) psi' events collected by BESIII at BEPCII. Clear signals are observed for psi'--pi0 h(c) with and without the subsequent radiative decay h(c)--gamma eta(c). First measurements of the absolute branching ratios B(psi'--pi0 h(c)) = (8.4+/-1.3+/-1.0) x 10(-4) and B(h(c)--gamma eta(c)) = (54.3+/-6.7+/-5.2)% are presented. A statistics-limited determination of the previously unmeasured h(c) width leads to an upper limit Gamma(h(c))1.44 MeV (90% confidence). Measurements of M(h(c)) = 3525.40+/-0.13+/-0.18 MeV/c2 and B(psi'--pi0 h(c)) x B(h(c)--gamma eta(c)) = (4.58+/-0.40+/-0.50) x 10(-4) are consistent with previous results.

Published
2010

7. Surface-acoustic-wave-induced transport in a double quantum dot

Author

H. W. Liu, Toshimasa Fujisawa, W.J.M. Naber, and W. G. van der Wiel

Subjects
Physics, SMI-NE: From 2006 in EWI-NE, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Phonon, Surface acoustic wave, FOS: Physical sciences, General Physics and Astronomy, Non-equilibrium thermodynamics, Coulomb blockade, Acoustic wave, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Molecular physics, Condensed Matter::Materials Science, Condensed Matter::Superconductivity, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), EWI-9468, IR-59085, Absorption (electromagnetic radiation), Quantum tunnelling, Excitation, METIS-238791
Abstract

We report on non-adiabatic transport through a double quantum dot under irradiation of surface acoustic waves generated on-chip. At low excitation powers, absorption and emission of single and multiple phonons is observed. At higher power, sequential phonon assisted tunneling processes excite the double dot in a highly non-equilibrium state. The present system is attractive for studying electron-phonon interaction with piezoelectric coupling., Comment: 4 pages, 3 figures

Published
2006
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8. Many-body effects in a modulation-doped semiconductor quantum well

Author

G. Weimann, H. W. Liu, Gérald Bastard, J. Orgonasi, W. Schlapp, Claude Delalande, M. Voos, and J.A. Brum

Subjects
chemistry.chemical_classification, Physics, Photoluminescence, chemistry, Electronic correlation, Condensed matter physics, Superlattice, General Physics and Astronomy, Electron, Electronic structure, Inorganic compound, Quantum well, Energy (signal processing)
Abstract

The electron areal concentration ${n}_{s}$ of a one-sided 130-\AA{}-thick GaAs-Ga(Al)As modulation-doped quantum well is continuously varied from 0 to 6.6\ifmmode\times\else\texttimes\fi{}${10}^{11}$ ${\mathrm{cm}}^{\ensuremath{-}2}$ by use of a Schottky gate. This allows one to study the precise evolution of the luminescence and excitation spectra with increasing ${n}_{s}$. From a comparison between the measured peak positions and Hartree calculations of the energy levels, a measurement of the band-gap renormalization is obtained.

Published
1987

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