Search

Your search keyword '"H.H. Liu"' showing total 137 results
Start Over Author "H.H. Liu"
137 results on '"H.H. Liu"'

1. Influence of light supplement on duck sternal calcification from integrated analysis of metabolome and transcriptome

Author

Q.F. Wu, H.H. Liu, Q.L. Yang, F.J. Pu, B. Wei, L.Y. Wang, J.P. Li, B. Hu, J.W. Hu, R.P. Zhang, C.C. Han, H. He, B. Kang, H.Y. Xu, S.Q. Hu, J.W. Wang, and L. Liang

Subjects
duck, sternal calcification, light supplement, metabolome, transcriptome, Animal culture, SF1-1100
Abstract

ABSTRACT: Calcification of bones is the critical process of bone development in birds, which is very important for sustaining the normal biological function of bones. Light is one of the vital factors affecting bone development, but whether light intensity affects bone calcification and the underlying mechanism is still unknown. In this study, we used duck sternum as a model to analyze the calcification process under different light regimes. In addition, the underlying mechanism was also illustrated by integrating metabolomics and transcriptome methods.The experiment lasted from 14 to 51 d of duck age. The control group (LP1) kept light intensity 2 lx during the whole experiment. The two light supplement groups (LP2, LP3) were given light with the intensity of 70 lx at different time (14–29 d for LP2, 14–43 d for LP3). Samples were collected at 52 d of duck age. Sternal calcification analysis showed no significant difference in proportion of area of cartilage matrix and trabecular bone in keel tissue among the 3 groups, but the degree of keel calcification in LP3 was higher than in the other 2 groups. Serum metabolomics showed 32 and 28 differentially accumulated metabolites (DAMs) in the 2 comparison groups, LP1 vs. LP3 and LP1 vs. LP2, respectively. Carboxylic acids and derivatives were the most abundant among the DAMs. Sternal transcriptome analysis showed 231 differentially expressed genes (DEGs), including 177 upregulated genes and 54 downregulated genes in group LP1 vs. LP3, and 22 DEGs in group LP1 vs. LP2. Protein-protein interaction (PPI) network analysis on DEGs between LP1 and LP3 showed that genes BTRC, GLI1, BMP4, and FOS were in the core position of the interaction network, and are also involved in bone development. KEGG pathway analysis of DAMs and DEGs showed that differences in Hedgehog signaling pathway, MAPK signaling pathway, apoptosis, energy metabolism, and amino acid metabolism following light treatment seem likely to have contributed to the observed difference in calcification of duck sternum.

Published
2022
Full Text
View/download PDF

2. POMC gene expression, polymorphism, and the association with reproduction traits in chickens

Author

K. Liu, Y.Y. Wen, H.H. Liu, H.Y. Cao, X.Y. Dong, H.G. Mao, and Z.Z. Yin

Subjects
POMC, polymorphisms, expression, reproduction traits, chicken, Animal culture, SF1-1100
Abstract

Reproduction trait is one of the most important economic traits in poultry industry. This study was aimed to investigate the mRNA expression levels, single nucleotide polymorphisms (SNP) of POMC gene, and the association with reproduction traits in chickens. Five SNP (g.958 G > A, g.1374 G > C, g.1393 G > A, g.1817 C > T, and g.1918G > A) were detected in introns of POMC gene in 317 Zhenning yellow chickens. Association analysis revealed that g.958 G > A and g.1817 C > T showed significantly associations with fertilization rate, hatching rate of hatching eggs, and hatching rate of fertilized eggs in chickens. Simultaneously, g.1374 G > C and g.1918G > A were both associated with egg weight at 300 D of age (P < 0.05). The SNP of g.958 G > A, g.1393 G > A, and g.1817 C > T were all associated with E2 hormone levels (P < 0.05). The result of mRNA expression levels in different tissues showed that POMC mRNA expression level in the pituitary was higher than those in the other tissues and varied in different genotypes. In conclusion, the results in this study provided new evidences that polymorphisms of the POMC gene have potential effects on reproduction traits in chickens. The 5 SNP detected in this study could be potential markers for improving reproduction traits in chickens.

Published
2020
Full Text
View/download PDF

3. Overfeeding influence on antioxidant capacity of serum, liver, gut, and breast muscle in Gang Goose and Tianfu Meat Goose

Author

R.X. Wei, Q. Song, S.Q. Hu, H.Y. Xu, H.H. Liu, B. Kang, L. Li, X.Y. Zeng, L. Chen, and C.C. Han

Subjects
overfeeding, antioxidant, live histology, small intestine, meat quality, Animal culture, SF1-1100, Food processing and manufacture, TP368-456
Abstract

Summary: This study was conducted to research the effect of overfeeding on antioxidant capacity of serum, liver, gut, and breast muscle in Gang Goose and Tianfu Meat Goose. Fifty-five Gang Geese and 55 Tianfu Meat Geese were separated respectively into a control group and an overfed group randomly (15 birds in control group, 40 birds in overfed group); all birds were slaughtered after overfeeding for 3 wk. After overfeeding, the concentration of triglyceride, insulin, and glucose increased in serum (P 0.05). The activities of total glutathione peroxidase (TGP), superoxide dismutase, and catalase (CAT) in serum of the control group were higher than those in the overfed group (P 0.05). The malonyldialdehyde content of intestine in the overfed group was higher than that in the control group (P

Published
2020
Full Text
View/download PDF

4. Effect of different types of sugar on gut physiology and microbiota in overfed goose

Author

C.C. Lu, R.X. Wei, D.H. Deng, Z.Y. Luo, M. Abdulai, H.H. Liu, B. Kang, S.Q. Hu, L. Li, H.Y. Xu, J.W. Hu, S.H. Wei, and C.C. Han

Subjects
glucose, fructose, sucrose, intestinal microorganism, fatty liver, Animal culture, SF1-1100
Abstract

ABSTRACT: To explored the difference of goose fatty liver formation induced-by different types of sugar from the intestinal physiology and the gut microflora, an integrated analysis of intestinal physiology and gut microbiota metagenomes was performed using samples collected from the geese including the normal-feeding geese and the overfed geese which were overfed with maize flour or overfeeding dietary supplementation with 10% sugar (glucose, fructose or sucrose, respectively), respectively. The results showed that the foie gras weight of the fructose group and the sucrose group was heavier (P < 0.05) than other groups. Compared with the control group, the ileum weight was significantly higher (P < 0.01), and the cecum weight was significantly lower in the sugar treatment groups (P < 0.001). Compared with the control group, the ratio of villi height to crypt depth in the fructose group was the highest in jejunum (P < 0.05); the trypsin activity of the ileum was higher in the fructose group and the sucrose group (P < 0.05). At the phylum level, Firmicutes, Proteobacteria and Bacteroidetes were the main intestinal flora of geese; and the abundance of Firmicutes in the jejunum was higher in the sugar treatment groups than that of the maize flour group. At the genus level, the abundance of Lactobacillus in the jejunum was higher (P < 0.05) in the sugar treatment groups than that of the maize flour group. In conclusion, forced-feeding diet supplementation with sugar induced stronger digestion and absorption capacity, increased the abundance of Firmicutes and Bacteroidetes and the abundance of Lactobacillus (especially fructose and sucrose) in the gut. So, the fructose and sucrose had higher induction on hepatic steatosis in goose fatty liver formation.

Published
2021
Full Text
View/download PDF

5. Comparison of overfeeding effects on gut physiology and microbiota in two goose breeds

Author

R.X. Wei, F.J. Ye, F. He, Q. Song, X.P. Xiong, W.L. Yang, X. Gang, J.W. Hu, B. Hu, H.Y. Xu, L. Li, H.H. Liu, X.Y. Zeng, L. Chen, B. Kang, and C.C. Han

Subjects
overfeeding, ERIC-PCR, antioxidant capacity, intestinal physiology, enteric microorganism, Animal culture, SF1-1100
Abstract

To have a better understanding of how the “gut–liver axis” mediates the lipid deposition in the liver, a comparison of overfeeding influence on intestine physiology and microbiota between Gang Goose and Tianfu Meat Goose was performed in this study. After force-feeding, compared with Gang Goose, Tianfu Meat Goose had better fat storage capacity in liver (397.94 vs. 166.54 for foie gras weight (g), P

Published
2021
Full Text
View/download PDF

6. Modeling three-dimensional rough surface and simulation of temperature and flow field in laser transmission welding

Author

C.Y. Wang, M.H. Jiang, C.D. Wang, H.H. Liu, D. Zhao, and Z.L. Chen

Subjects
3D rough surface, Laser transmission welding, Temperature field, Flow field, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

Abstracts: The traditional Laser Transmission Welding (LTW) simulation method assumes that the welding contact interface is smooth. However, the actual welding interfaces exhibit a large number of rough surfaces. The mismatch may decrease the accuracy of the traditional finite element model (FEM). Thus, this work aims to establish a three-dimensional (3D) FEM model considering the rough surface. Numerical model for 3D rough surface of welding specimen is established. The distribution of molten pool area, temperature and flow field coupling are discussed. Then, a series of experiments were set up to obtain the weld width to verify the model. The results show that the temperature of the contact surface between the transparent part and the absorbent layer is discontinuous, which is consistent with the incomplete contact of the contact surface under real welding conditions. The error of weld width values between the simulated and experiment is smaller, which also confirm that the established model is more precise.

Published
2020
Full Text
View/download PDF

7. Dark photon search in the mass range between 1.5 and 3.4 GeV/c2

Author

M. Ablikim, M.N. Achasov, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, H.Y. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, S.X. Du, P.F. Duan, E.E. Eren, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.Y. Gao, Y. Gao, Z. Gao, I. Garzia, 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. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, Y.L. Han, X.Q. Hao, F.A. Harris, K.L. He, Z.Y. He, T. Held, Y.K. Heng, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.M. Huang, G.S. Huang, H.P. Huang, J.S. Huang, X.T. Huang, Y. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.L. Jiang, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, W. Kuehn, A. Kupsc, J.S. Lange, M. Lara, P. Larin, C. Leng, C. Li, C.H. Li, Cheng Li, D.M. Li, F. Li, G. Li, H.B. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.M. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B.J. Liu, C.X. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, X.X. Liu, Y.B. Liu, Z.A. Liu, Zhiqiang Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, R.Q. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, M. Lv, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, F.E. Maas, M. Maggiora, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, K. Moriya, N.Yu. Muchnoi, H. Muramatsu, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, Y.N. Pu, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Y. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, H.L. Ren, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, V. Santoro, A. Sarantsev, M. Savrié, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, M. Ullrich, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. 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. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, Z. Wu, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Q.L. Xiu, G.F. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y. Yang, Y.X. Yang, H. Ye, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, H.W. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.H. Zhang, X.Y. Zhang, Y. Zhang, Y.N. Zhang, Y.H. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, Li Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
Dark photon search, Initial state radiation, BESIII, Physics, QC1-999
Abstract

Using a data set of 2.93 fb−1 taken at a center-of-mass energy s=3.773 GeV with the BESIII detector at the BEPCII collider, we perform a search for an extra U(1) gauge boson, also denoted as a dark photon. We examine the initial state radiation reactions e+e−→e+e−γISR and e+e−→μ+μ−γISR for this search, where the dark photon would appear as an enhancement in the invariant mass distribution of the leptonic pairs. We observe no obvious enhancement in the mass range between 1.5 and 3.4 GeV/c2 and set a 90% confidence level upper limit on the mixing strength of the dark photon and the Standard Model photon. We obtain a competitive limit in the tested mass range.

Published
2017
Full Text
View/download PDF

8. Measurement of cross sections of the interactions e+e−→ϕϕω and e+e−→ϕϕϕ at center-of-mass energies from 4.008 to 4.600 GeV

Author

M. Ablikim, M.N. Achasov, S. Ahmed, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, N. Berger, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J. Chai, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, Z.L. Dou, S.X. Du, P.F. Duan, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, Y. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, Y.T. Gu, Y.H. Guan, A.Q. Guo, L.B. Guo, R.P. Guo, Y. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, X.Q. Hao, F.A. Harris, K.L. He, F.H. Heinsius, T. Held, Y.K. Heng, T. Holtmann, Z.L. Hou, C. Hu, H.M. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Huang, T. Hussain, W. Ikegami Andersson, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, A. Kupsc, W. Kühn, J.S. Lange, M. Lara, P. Larin, H. Leithoff, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Y.B. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Z.A. Liu, Zhiqing Liu, H. Loehner, Y.F. Long, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, M.M. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, G. Mezzadri, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, G. Morello, N.Yu. Muchnoi, H. Muramatsu, P. Musiol, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, A. Sarantsev, M. Savrié, C. Schnier, K. Schoenning, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, W. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, Zongyuan Wang, T. Weber, D.H. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Y.H. Xie, Q.L. Xiu, G.F. Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, Z.Y. You, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.N. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
e+e− annihilation, Triple quarkonia, Cross section, Physics, QC1-999
Abstract

Using data samples collected with the BESIII detector at the BEPCII collider at six center-of-mass energies between 4.008 and 4.600 GeV, we observe the processes e+e−→ϕϕω and e+e−→ϕϕϕ. The Born cross sections are measured and the ratio of the cross sections σ(e+e−→ϕϕω)/σ(e+e−→ϕϕϕ) is estimated to be 1.75±0.22±0.19 averaged over six energy points, where the first uncertainty is statistical and the second is systematic. The results represent first measurements of these interactions.

Published
2017
Full Text
View/download PDF

9. Observation of the decay Λc+→Σ−π+π+π0

Author

M. Ablikim, M.N. Achasov, S. Ahmed, M. Albrecht, A. Amoroso, F.F. An, Q. An, J.Z. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, N. Berger, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J. Chai, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X.R. Chen, Y.B. Chen, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, O. Dorjkhaidav, Z.L. Dou, S.X. Du, P.F. Duan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, S. Fegan, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, S. Gu, Y.T. Gu, A.Q. Guo, L.B. Guo, R.P. Guo, Y.P. Guo, Z. Haddadi, S. Han, X.Q. Hao, F.A. Harris, K.L. He, X.Q. He, F.H. Heinsius, T. Held, Y.K. Heng, T. Holtmann, Z.L. Hou, C. Hu, H.M. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Huang, T. Hussain, W. Ikegami Andersson, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, T. Khan, P. Kiese, R. Kliemt, L. Koch, O.B. Kolcu, B. Kopf, M. Kornicer, M. Kuemmel, M. Kuhlmann, A. Kupsc, W. Kühn, J.S. Lange, M. Lara, P. Larin, L. Lavezzi, H. Leithoff, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, Ke Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Z.A. Liu, Zhiqing Liu, Y.F. Long, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, M.M. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, G. Mezzadri, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, G. Morello, N.Yu. Muchnoi, H. Muramatsu, P. Musiol, A. Mustafa, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, J. Pellegrino, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, J.J. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Richter, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, A. Sarantsev, M. Savrié, C. Schnier, K. Schoenning, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, J.J. Song, X.Y. Song, S. Sosio, C. Sowa, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.K. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, G.Y. Tang, X. Tang, I. Tapan, M. Tiemens, B.T. Tsednee, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, Dan Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, W.P. Wang, X.F. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, T. Weber, D.H. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, Y. Xia, D. Xiao, H. Xiao, Y.J. Xiao, Z.J. Xiao, Y.G. Xie, Y.H. Xie, X.A. Xiong, Q.L. Xiu, G.F. Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.H. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, Z.Y. You, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, Y.X. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
Branching fraction, Charmed baryon, Weak decays, e+e− annihilation, BESIII, Physics, QC1-999
Abstract

We report the first observation of the decay Λc+→Σ−π+π+π0, based on data obtained in e+e− annihilations with an integrated luminosity of 567 pb−1 at s=4.6 GeV. The data were collected with the BESIII detector at the BEPCII storage rings. The absolute branching fraction B(Λc+→Σ−π+π+π0) is determined to be (2.11±0.33(stat.)±0.14(syst.))%. In addition, an improved measurement of B(Λ+c→Σ−π+π+) is determined as (1.81±0.17(stat.)±0.09(syst.))%.

Published
2017
Full Text
View/download PDF

10. Measurements of cross section of e+e−→pp¯π0 at center-of-mass energies between 4.008 and 4.600 GeV

Author

M. Ablikim, M.N. Achasov, S. Ahmed, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, N. Berger, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J. Chai, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, Z.L. Dou, S.X. Du, P.F. Duan, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, O. Fedorov, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, Y. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, Y.T. Gu, Y.H. Guan, A.Q. Guo, L.B. Guo, R.P. Guo, Y. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, X.Q. Hao, F.A. Harris, K.L. He, F.H. Heinsius, T. Held, Y.K. Heng, T. Holtmann, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Y. Huang, Z.L. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, A. Kupsc, W. Kühn, J.S. Lange, M. Lara, P. Larin, H. Leithoff, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Y.B. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Z.A. Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, M.M. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, G. Mezzadri, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, N.Yu. Muchnoi, H. Muramatsu, P. Musiol, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, A. Sarantsev, M. Savrié, C. Schnier, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, M. Shi, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, S.G. Wang, W. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Q.L. Xiu, G.F. Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.N. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
Physics, QC1-999
Abstract

Based on e+e− annihilation data samples collected with the BESIII detector at the BEPCII collider at 13 center-of-mass energies from 4.008 to 4.600 GeV, measurements of the Born cross section of e+e−→pp¯π0 are performed. No significant resonant structure is observed in the measured energy dependence of the cross section. The upper limit on the Born cross section of e+e−→Y(4260)→pp¯π0 at the 90% C.L. is determined to be 0.01 pb. The upper limit on the ratio of the branching fractions B(Y(4260)→pp¯π0)B(Y(4260)→π+π−J/ψ) at the 90% C.L. is determined to be 0.02%. Keywords: Hadrons, Cross section measurements, Y(4260)

Published
2017
Full Text
View/download PDF

11. Study of J/ψ and ψ(3686)→Σ(1385)0Σ¯(1385)0 and Ξ0Ξ¯0

Author

M. Ablikim, M.N. Achasov, S. Ahmed, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, N. Berger, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J. Chai, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, Z.L. Dou, S.X. Du, P.F. Duan, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, Y. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, Y.T. Gu, Y.H. Guan, A.Q. Guo, L.B. Guo, R.P. Guo, Y. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, X.Q. Hao, F.A. Harris, K.L. He, F.H. Heinsius, T. Held, Y.K. Heng, T. Holtmann, Z.L. Hou, C. Hu, H.M. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Huang, T. Hussain, W. Ikegami Andersson, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, A. Kupsc, W. Kühn, J.S. Lange, M. Lara, P. Larin, H. Leithoff, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Y.B. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Z.A. Liu, Zhiqing Liu, H. Loehner, Y.F. Long, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, M.M. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, G. Mezzadri, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, G. Morello, N.Yu. Muchnoi, H. Muramatsu, P. Musiol, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, A. Sarantsev, M. Savrié, C. Schnier, K. Schoenning, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, W. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, T. Weber, D.H. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Y.H. Xie, Q.L. Xiu, G.F. Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, Z.Y. You, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.N. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
Charmonium, Branching fraction, Angular distribution, Physics, QC1-999
Abstract

We study the decays of J/ψ and ψ(3686) to the final states Σ(1385)0Σ¯(1385)0 and Ξ0Ξ¯0 based on a single baryon tag method using data samples of (1310.6±7.0)×106 J/ψ and (447.9±2.9)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. The decays to Σ(1385)0Σ¯(1385)0 are observed for the first time. The measured branching fractions of J/ψ and ψ(3686) to Ξ0Ξ¯0 are in good agreement with, and much more precise than, the previously published results. The angular parameters for these decays are also measured for the first time. The measured angular decay parameter for J/ψ→Σ(1385)0Σ¯(1385)0, α=−0.64±0.03±0.10, is found to be negative, different to the other decay processes in this measurement. In addition, the “12% rule” and isospin symmetry in the decays of J/ψ and ψ(3686) to ΞΞ¯ and Σ(1385)Σ¯(1385) are tested.

Published
2017
Full Text
View/download PDF

12. Measurement of the absolute branching fraction for Λc+→Λμ+νμ

Author

M. Ablikim, M.N. Achasov, S. Ahmed, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, N. Berger, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, Z.L. Dou, S.X. Du, P.F. Duan, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, Y. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, Y.T. Gu, Y.H. Guan, A.Q. Guo, L.B. Guo, R.P. Guo, Y. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, X.Q. Hao, F.A. Harris, K.L. He, F.H. Heinsius, T. Held, Y.K. Heng, T. Holtmann, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Huang, T. Hussain, W. Ikegami Andersson, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, A. Kupsc, W. Kühn, J.S. Lange, M. Lara, P. Larin, L. Lavezzi, H. Leithoff, C. Leng, C. Li, Li Cheng, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, Lei. Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Y.B. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, Q.J. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Z.A. Liu, Z.Q. Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, M.M. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, G. Mezzadri, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, N.Yu. Muchnoi, H. Muramatsu, P. Musiol, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, A. Sarantsev, M. Savrié, C. Schnier, K. Schoenning, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, W. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, T. Weber, D.H. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Xie Yuehong, Q.L. Xiu, G.F. Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, Z.Y. You, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.N. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
Λc+, Semi-leptonic decay, Absolute branching fraction, BESIII, Physics, QC1-999
Abstract

We report the first measurement of the absolute branching fraction for Λc+→Λμ+νμ. This measurement is based on a sample of e+e− annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λc+→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λc+→Λμ+νμ)/B(Λc+→Λe+νe) to be 0.96±0.16(stat)±0.04(syst).

Published
2017
Full Text
View/download PDF

13. Measurements of the branching fractions for D+→KS0KS0K+, KS0KS0π+ and D0→KS0KS0, KS0KS0KS0

Author

M. Ablikim, M.N. Achasov, S. Ahmed, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, N. Berger, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J. Chai, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, Z.L. Dou, S.X. Du, P.F. Duan, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, O. Fedorov, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, Y. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, Y.T. Gu, Y.H. Guan, A.Q. Guo, L.B. Guo, R.P. Guo, Y. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, X.Q. Hao, F.A. Harris, K.L. He, F.H. Heinsius, T. Held, Y.K. Heng, T. Holtmann, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Y. Huang, Z.L. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, A. Kupsc, W. Kühn, J.S. Lange, M. Lara, P. Larin, H. Leithoff, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Y.B. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Z.A. Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, M.M. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, G. Mezzadri, J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, N.Yu. Muchnoi, H. Muramatsu, P. Musiol, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, A. Sarantsev, M. Savrié, C. Schnier, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, M. Shi, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, S.G. Wang, W. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Q.L. Xiu, G.F. Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.N. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
BESIII, D0 and D+ mesons, Hadronic decays, Branching fractions, Physics, QC1-999
Abstract

By analyzing 2.93fb−1 of data taken at the ψ(3770) resonance peak with the BESIII detector, we measure the branching fractions for the hadronic decays D+→KS0KS0K+, D+→KS0KS0π+, D0→KS0KS0 and D0→KS0KS0KS0. They are determined to be B(D+→KS0KS0K+)=(2.54±0.05stat.±0.12sys.)×10−3, B(D+→KS0KS0π+)=(2.70±0.05stat.±0.12sys.)×10−3, B(D0→KS0KS0)=(1.67±0.11stat.±0.11sys.)×10−4 and B(D0→KS0KS0KS0)=(7.21±0.33stat.±0.44sys.)×10−4, where the second one is measured for the first time and the others are measured with significantly improved precision over the previous measurements.

Published
2017
Full Text
View/download PDF

14. Measurement of the leptonic decay width of J/ψ using initial state radiation

Author

M. Ablikim, M.N. Achasov, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, H.Y. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, S.X. Du, P.F. Duan, E.E. Eren, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.Y. Gao, Y. Gao, Z. Gao, I. Garzia, 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. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, Y.L. Han, X.Q. Hao, F.A. Harris, K.L. He, Z.Y. He, T. Held, Y.K. Heng, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.M. Huang, G.S. Huang, H.P. Huang, J.S. Huang, X.T. Huang, Y. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.L. Jiang, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, W. Kuehn, A. Kupsc, J.S. Lange, M. Lara, P. Larin, C. Leng, C. Li, C.H. Li, Cheng Li, D.M. Li, F. Li, G. Li, H.B. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.M. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B.J. Liu, C.X. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, X.X. Liu, Y.B. Liu, Z.A. Liu, Zhiqiang Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, R.Q. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, M. Lv, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, F.E. Maas, M. Maggiora, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, K. Moriya, N.Yu. Muchnoi, H. Muramatsu, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, Y.N. Pu, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Y. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, H.L. Ren, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, V. Santoro, A. Sarantsev, M. Savrié, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, M. Ullrich, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. 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. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, Z. Wu, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Q.L. Xiu, G.F. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y. Yang, Y.X. Yang, H. Ye, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, H.W. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.H. Zhang, X.Y. Zhang, Y. Zhang, Y.N. Zhang, Y.H. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, Li Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
J/ψ resonance, Electronic width, Initial state radiation, BESIII, Physics, QC1-999
Abstract

Using a data set of 2.93 fb−1 taken at a center-of-mass energy of s=3.773 GeV with the BESIII detector at the BEPCII collider, we measure the process e+e−→J/ψγ→μ+μ−γ and determine the product of the branching fraction and the electronic width Bμμ⋅Γee=(333.4±2.5stat±4.4sys) eV. Using the earlier-published BESIII result for Bμμ=(5.973±0.007stat±0.037sys)%, we derive the J/ψ electronic width Γee=(5.58±0.05stat±0.08sys) keV.

Published
2016
Full Text
View/download PDF

15. Measurement of the e+e−→π+π− cross section between 600 and 900 MeV using initial state radiation

Author

M. Ablikim, M.N. Achasov, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, H.Y. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, S.X. Du, P.F. Duan, E.E. Eren, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.Y. Gao, Y. Gao, Z. Gao, I. Garzia, 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. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, X.Q. Hao, F.A. Harris, K.L. He, X.Q. He, T. Held, Y.K. Heng, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.M. Huang, G.S. Huang, J.S. Huang, X.T. Huang, Y. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, W. Kühn, A. Kupsc, J.S. Lange, M. Lara, P. Larin, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.M. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B.J. Liu, C.X. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Z.A. Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, F.E. Maas, M. Maggiora, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, K. Moriya, N.Yu. Muchnoi, H. Muramatsu, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, V. Santoro, A. Sarantsev, M. Savrié, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, M.R. Shepherd, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, M. Ullrich, I. Uman, G.S. Varner, B. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. 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. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, Z. Wu, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Q.L. Xiu, G.F. Xu, L. Xu, Q.J. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, X.Y. Zhang, Y. Zhang, Y.N. Zhang, Y.H. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
Hadronic cross section, Muon anomaly, Initial state radiation, Pion form factor, BESIII, Physics, QC1-999
Abstract

We extract the e+e−→π+π− cross section in the energy range between 600 and 900 MeV, exploiting the method of initial state radiation. A data set with an integrated luminosity of 2.93 fb−1 taken at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider is used. The cross section is measured with a systematic uncertainty of 0.9%. We extract the pion form factor |Fπ|2 as well as the contribution of the measured cross section to the leading-order hadronic vacuum polarization contribution to (g−2)μ. We find this value to be aμππ,LO(600–900MeV)=(368.2±2.5stat±3.3sys)⋅10−10, which is between the corresponding values using the BaBar or KLOE data.

Published
2016
Full Text
View/download PDF

16. Measurement of the branching fraction for ψ(3770)→γχc0

Author

M. Ablikim, M.N. Achasov, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, H.Y. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, Z.L. Dou, S.X. Du, P.F. Duan, E.E. Eren, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, O. Fedorov, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, X.Y. Gao, Y. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, Y.T. Gu, Y.H. Guan, A.Q. Guo, L.B. Guo, Y. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, X.Q. Hao, F.A. Harris, K.L. He, T. Held, Y.K. Heng, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, Y. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, W. Kuehn, A. Kupsc, J.S. Lange, M. Lara, P. Larin, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.M. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Z.A. Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, N.Yu. Muchnoi, H. Muramatsu, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, V. Santoro, A. Sarantsev, M. Savrié, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, M. Ullrich, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, S.G. Wang, W. Wang, W.P. Wang, X.F. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, Z. Wu, L. Xia, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Q.L. Xiu, G.F. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.N. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
Physics, QC1-999
Abstract

By analyzing a data set of 2.92 fb−1 of e+e− collision data taken at s=3.773 GeV and 106.41×106 ψ(3686) decays taken at s=3.686 GeV with the BESIII detector at the BEPCII collider, we measure the branching fraction and the partial decay width for ψ(3770)→γχc0 to be B(ψ(3770)→γχc0)=(6.88±0.28±0.67)×10−3 and Γ[ψ(3770)→γχc0]=(187±8±19) keV, respectively. These are the most precise measurements to date.

Published
2016
Full Text
View/download PDF

17. Measurement of the branching fractions of Ds+→η′X and Ds+→η′ρ+ in e+e−→Ds+Ds−

Author

M. Ablikim, M.N. Achasov, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, H.Y. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, S.X. Du, P.F. Duan, E.E. Eren, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.Y. Gao, Y. Gao, Z. Gao, I. Garzia, 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. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, Y.L. Han, X.Q. Hao, F.A. Harris, K.L. He, Z.Y. He, T. Held, Y.K. Heng, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.M. Huang, G.S. Huang, H.P. Huang, J.S. Huang, X.T. Huang, Y. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.L. Jiang, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, W. Kühn, A. Kupsc, J.S. Lange, M. Lara, P. Larin, C. Leng, C. Li, C.H. Li, Cheng Li, D.M. Li, F. Li, G. Li, H.B. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.M. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B.J. Liu, C.X. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, X.X. Liu, Y.B. Liu, Z.A. Liu, Zhiqiang Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, R.Q. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, M. Lv, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, F.E. Maas, M. Maggiora, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, K. Moriya, N.Yu. Muchnoi, H. Muramatsu, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, Y.N. Pu, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Y. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, H.L. Ren, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, V. Santoro, A. Sarantsev, M. Savrié, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, M. Ullrich, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. 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. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, Z. Wu, L.G. Xia, Y. Xia, D. Xiao, Z.J. Xiao, Y.G. Xie, Q.L. Xiu, G.F. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y. Yang, Y.X. Yang, H. Ye, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, H.W. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.H. Zhang, X.Y. Zhang, Y. Zhang, Y.N. Zhang, Y.H. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, Li Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
BESIII, Ds, Branching fractions, Physics, QC1-999
Abstract

We study Ds+ decays to final states involving the η′ with a 482 pb−1 data sample collected at s=4.009 GeV with the BESIII detector at the BEPCII collider. We measure the branching fractions B(Ds+→η′X)=(8.8±1.8±0.5)% and B(Ds+→η′ρ+)=(5.8±1.4±0.4)% where the first uncertainty is statistical and the second is systematic. In addition, we estimate an upper limit on the non-resonant branching ratio B(Ds+→η′π+π0)

Published
2015
Full Text
View/download PDF

18. An improved limit for Γee of X(3872) and Γee measurement of ψ(3686)

Author

M. Ablikim, M.N. Achasov, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, O. Bondarenko, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, H.Y. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, D. Cronin-Hennessy, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, S.X. Du, P.F. Duan, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.Y. Gao, Y. Gao, Z. Gao, I. Garzia, 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. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, Y.L. Han, X.Q. Hao, F.A. Harris, K.L. He, Z.Y. He, T. Held, Y.K. Heng, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.M. Huang, G.S. Huang, H.P. Huang, J.S. Huang, X.T. Huang, Y. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.L. Jiang, L.W. Jiang, X.S. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, W. Kühn, A. Kupsc, W. Lai, J.S. Lange, M. Lara, P. Larin, C. Leng, C.H. Li, Cheng Li, D.M. Li, F. Li, G. Li, H.B. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.M. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B.J. 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, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, X.X. Liu, Y.B. Liu, Z.A. Liu, Zhiqiang Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, R.Q. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, M. Lv, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, S. Ma, T. Ma, X.N. Ma, X.Y. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, K. Moriya, N.Yu. Muchnoi, H. Muramatsu, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, Y.N. Pu, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Y. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, H.L. Ren, M. Ripka, G. Rong, X.D. Ruan, V. Santoro, A. Sarantsev, M. Savrié, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, D. Toth, M. Ullrich, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. 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. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, Z. Wu, L.G. Xia, Y. Xia, D. Xiao, Z.J. Xiao, Y.G. Xie, Q.L. Xiu, G.F. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.X. Yang, L. Yang, Y. Yang, Y.X. Yang, H. Ye, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, H.W. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.H. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.T. Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, Li Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, and J.H. Zou

Subjects
X(3872), ψ(3686), Γee, Charmonium spectroscopy, BESIII, Physics, QC1-999
Abstract

Using the data sets taken at center-of-mass energies above 4 GeV by the BESIII detector at the BEPCII storage ring, we search for the reaction e+e−→γISRX(3872)→γISRπ+π−J/ψ via the Initial State Radiation technique. The production of a resonance with quantum numbers JPC=1++ such as the X(3872) via single photon e+e− annihilation is forbidden, but is allowed by a next-to-leading order box diagram. We do not observe a significant signal of X(3872), and therefore give an upper limit for the electronic width times the branching fraction ΓeeX(3872)B(X(3872)→π+π−J/ψ)

Published
2015
Full Text
View/download PDF

19. Measurement of yCP in D0–D¯0 oscillation using quantum correlations in e+e−→D0D¯0 at s=3.773 GeV

Author

M. Ablikim, M.N. Achasov, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, O. Bondarenko, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, H.Y. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, H.P. Cheng, X.K. Chu, G. Cibinetto, D. Cronin-Hennessy, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, S.X. Du, P.F. Duan, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, Y. Gao, Z. Gao, I. Garzia, K. Goetzen, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, Y.T. Gu, Y.H. Guan, A.Q. Guo, L.B. Guo, T. Guo, Y. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, Y.L. Han, F.A. Harris, K.L. He, Z.Y. He, T. Held, Y.K. Heng, Z.L. Hou, C. Hu, H.M. Hu, J.F. Hu, T. Hu, Y. Hu, G.M. Huang, G.S. Huang, H.P. Huang, J.S. Huang, X.T. Huang, Y. Huang, T. Hussain, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.L. Jiang, L.W. Jiang, X.S. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, W. Kuehn, A. Kupsc, W. Lai, J.S. Lange, M. Lara, P. Larin, C.H. Li, Cheng Li, D.M. Li, F. Li, G. Li, H.B. Li, J.C. Li, Jin Li, K. Li, P.R. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.M. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B.J. 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, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, X.X. Liu, Y.B. Liu, Z.A. Liu, Zhiqiang Liu, Zhiqing Liu, H. Loehner, X.C. Lou, H.J. Lu, J.G. Lu, R.Q. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, M. Lv, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, S. Ma, T. Ma, X.N. Ma, X.Y. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, K. Moriya, N.Yu. Muchnoi, H. Muramatsu, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J.L. Ping, R.G. Ping, R. Poling, Y.N. Pu, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Y. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, H.L. Ren, M. Ripka, G. Rong, X.D. Ruan, V. Santoro, A. Sarantsev, M. Savrié, K. Schoenning, S. Schumann, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, M.R. Shepherd, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, B. Spruck, G.X. Sun, J.F. Sun, S.S. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, D. Toth, M. Ullrich, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. 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. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, Z. Wu, L.G. Xia, Y. Xia, D. Xiao, Z.J. Xiao, Y.G. Xie, G.F. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.X. Yang, L. Yang, Y. Yang, Y.X. Yang, H. Ye, M. Ye, M.H. Ye, J.H. Yin, B.X. Yu, C.X. Yu, H.W. Yu, J.S. Yu, C.Z. Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.H. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.T. Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, Li Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, B.S. Zou, and J.H. Zou

Subjects
Physics, QC1-999
Abstract

We report a measurement of the parameter yCP in D0–D¯0 oscillations performed by taking advantage of quantum coherence between pairs of D0D¯0 mesons produced in e+e− annihilations near threshold. In this work, doubly-tagged D0D¯0 events, where one D decays to a CP eigenstate and the other D decays in a semileptonic mode, are reconstructed using a data sample of 2.92 fb−1 collected with the BESIII detector at the center-of-mass energy of s=3.773 GeV. We obtain yCP=(−2.0±1.3±0.7)%, where the first uncertainty is statistical and the second is systematic. This result is compatible with the current world average. Keywords: BESIII, D0–D¯0 oscillation, yCP, Quantum correlation

Published
2015
Full Text
View/download PDF

20. A 3nm CMOS FinFlex™ Platform Technology with Enhanced Power Efficiency and Performance for Mobile SoC and High Performance Computing Applications

Author

Shien-Yang Wu, C.H. Chang, M.C. Chiang, C.Y. Lin, J.J. Liaw, J.Y. Cheng, J.Y. Yeh, H.F. Chen, S.Y. Chang, K.T. Lai, M.S. Liang, K.H. Pan, J.H. Chen, V.S. Chang, T.C. Luo, X. Wang, Y.S. Mor, C.I. Lin, S.H. Wang, M.Y. Hsieh, C.Y. Chen, B.F. Wu, C.J. Lin, C.S. Liang, C.P. Tsao, C.T. Li, C.H. Chen, C.H. Hsieh, H.H. Liu, P.N. Chen, C.C. Chen, R. Chen, Y.C. Yeo, C.O. Chui, W. Chang, T.L. Lee, K.B. Huang, H.J. Lin, K.W. Chen, M.H. Tsai, K.S. Chen, X.M. Chen, Y.K. Cheng, C.H. Wang, W. Shue, Y. Ku, S. M. Jang, M. Cao, L.C. Lu, and T.S. Chang

Published
2022

24. Evolution of polymorph and photoelectric properties of VO2 thin films with substrate temperature

Author

J.B. Wu, H.T. Zong, C.Y. Kang, C.C. Geng, S.S. Liang, Chengcui Zhang, H.H. Liu, Z.F. Wei, and Ming Li

Subjects
Thermochromism, Materials science, Mechanical Engineering, Metals and Alloys, 02 engineering and technology, Substrate (electronics), 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Amorphous solid, Chemical engineering, Mechanics of Materials, Materials Chemistry, Transmittance, Deposition (phase transition), Thin film, 0210 nano-technology, human activities, Temperature coefficient, Sheet resistance
Abstract

For specific application, direct deposition of high quality VO2 films on common glass substrates is potentially promising and the work for controllable preparation of VO2 films with different polymorphs is desirable. This work reports controllable preparation of VO2 films with different polymorphs (B and M) optimizing physical and thermochromic properties of VO2 thin films on amorphous glass via controlling the substrate temperature. By adjusting the substrate temperature, B-VO2 films which can be formed at a relatively low temperature (400 °C) possesses a comfortable sheet resistance and the value of temperature coefficient of resistance (TCR) is about 2.4%/K; M − VO2 thin films are successfully prepared when the substrate temperature is higher than 400 °C. It is found that the optimized VO2 (M) thin film grown at 500 °C has a favorable property such as ∼3 orders of magnitude change in sheet resistance during phase transition, high luminous transmittance of more than 62%, a solar switching efficiency of ∼7.5% and a Near-Infrared-Region switching efficiency of 52.4%. Our experimental results can provide technical supports for the practical application of VO2 thin films.

Published
2019

25. Impact of Nitrogen Regimes and Planting Densities on Stem Physiology, Lignin Biosynthesis and Grain Yield in Relation to Lodging Resistance in Winter Wheat (Triticum aestivum L.)

Author

A. Khan, H.H. Liu, A. Ahmad, L. Xiang, W. Ali, M. Kamran, S. Ahmad, and J.C. Li

Subjects
0106 biological sciences, 0301 basic medicine, Physiology, Randomized block design, food and beverages, Sowing, Plant physiology, chemistry.chemical_element, Biology, 01 natural sciences, Nitrogen, 03 medical and health sciences, chemistry.chemical_compound, 030104 developmental biology, Stalk, Agronomy, chemistry, Genetics, Lignin, Interception, Agronomy and Crop Science, 010606 plant biology & botany, Plant stem
Abstract

Higher plant population and nitrogen management is an adopted approach for improving crop productivity from limited land resources. Moreover, higher plant density and nitrogen regimes may increase the risk of stalk lodging, which is a consequence of complex interplant competition of individual organs. Here, we aimed to investigate the dynamic change in morphology, chemical compositions and lignin promoting enzymes of the second basal inter-nodes altering lodging risk controlled by planting density and nitrogen levels. A field trial was conducted at the Mengcheng research station (33°9′44″N, 116°32′56″E), Huaibei plain, Anhui province, China. A randomized complete block design was adopted, in which four plant densities, i.e., 180, 240, 300, and 360 × 104 ha−1 and four N levels, i.e., 0, 180, 240, and 300 kg ha−1 were studied. The two popular wheat varieties AnNong0711 and YanNong19 were cultivated. Results revealed that the culm lodging resistance (CLRI) index of the second basal internodes was positively and significantly correlated with light interception, lignin and cellulose content. The lignin and cellulose contents were significantly and positive correlated to light interception. The increased planting density and nitrogen levels declined the lignin and its related enzymes activities. The variety AnNong0711 showed more resistive response to lodging compared to YanNong19. Overall our study found that increased planting densities and nitrogen regimes resulted in poor physical strength and enzymatic activity which enhanced lodging risk in wheat varieties. The current study demonstrated that stem bending strength of the basal internode was significantly positive correlated to grains per spike. The thousand grain weight and grain yield had a positive and significant relationship with stem bending strength of the basal internode. The results suggested that the variety YanNong19 produces higher grain yield (9298 kg ha−1) at density 240 × 104 plants ha−1, and 180 kg ha−1 nitrogen, while AnNong0711 produced higher grain yield (10178.86 kg ha−1) at density 240 × 104 plants ha−1 and with 240 kg ha−1 nitrogen. Moreover, this combination of nitrogen and planting density enhanced the grain yield with better lodging resistance.

Published
2019

27. Tinnitus and tinnitus disorder: Theoretical and operational definitions (an international multidisciplinary proposal)

Author

De Ridder, D. Schlee, W. Vanneste, S. Londero, A. Weisz, N. Kleinjung, T. Shekhawat, G.S. Elgoyhen, A.B. Song, J.-J. Andersson, G. Adhia, D. de Azevedo, A.A. Baguley, D.M. Biesinger, E. Binetti, A.C. Del Bo, L. Cederroth, C.R. Cima, R. Eggermont, J.J. Figueiredo, R. Fuller, T.E. Gallus, S. Gilles, A. Hall, D.A. Van de Heyning, P. Hoare, D.J. Khedr, E.M. Kikidis, D. Kleinstaeuber, M. Kreuzer, P.M. Lai, J.-T. Lainez, J.M. Landgrebe, M. Li, L.P.-H. Lim, H.H. Liu, T.-C. Lopez-Escamez, J.A. Mazurek, B. Moller, A.R. Neff, P. Pantev, C. Park, S.N. Piccirillo, J.F. Poeppl, T.B. Rauschecker, J.P. Salvi, R. Sanchez, T.G. Schecklmann, M. Schiller, A. Searchfield, G.D. Tyler, R. Vielsmeier, V. Vlaeyen, J.W.S. Zhang, J. Zheng, Y. de Nora, M. Langguth, B.

Subjects
otorhinolaryngologic diseases
Abstract

As for hypertension, chronic pain, epilepsy and other disorders with particular symptoms, a commonly accepted and unambiguous definition provides a common ground for researchers and clinicians to study and treat the problem. The WHO's ICD11 definition only mentions tinnitus as a nonspecific symptom of a hearing disorder, but not as a clinical entity in its own right, and the American Psychiatric Association's DSM-V doesn't mention tinnitus at all. Here we propose that the tinnitus without and with associated suffering should be differentiated by distinct terms: “Tinnitus” for the former and “Tinnitus Disorder” for the latter. The proposed definition then becomes “Tinnitus is the conscious awareness of a tonal or composite noise for which there is no identifiable corresponding external acoustic source, which becomes Tinnitus Disorder “when associated with emotional distress, cognitive dysfunction, and/or autonomic arousal, leading to behavioural changes and functional disability.”. In other words “Tinnitus” describes the auditory or sensory component, whereas “Tinnitus Disorder” reflects the auditory component and the associated suffering. Whereas acute tinnitus may be a symptom secondary to a trauma or disease, chronic tinnitus may be considered a primary disorder in its own right. If adopted, this will advance the recognition of tinnitus disorder as a primary health condition in its own right. The capacity to measure the incidence, prevalence, and impact will help in identification of human, financial, and educational needs required to address acute tinnitus as a symptom but chronic tinnitus as a disorder. © 2021 Elsevier B.V.

Published
2021

28. The melt protection mechanism of an SO2/CO2 gas mixture for a magnesium-rare-earth based alloy

Author

Jingxue Sun, Xinyi Zhao, Alan A. Luo, Zhiliang Ning, F.Y. Cao, Yongjiang Huang, W.Z. Liang, and H.H. Liu

Subjects
010302 applied physics, Materials science, Magnesium, Scanning electron microscope, Mechanical Engineering, Metallurgy, Alloy, Metals and Alloys, chemistry.chemical_element, Gas protection, 02 engineering and technology, engineering.material, 021001 nanoscience & nanotechnology, Microstructure, 01 natural sciences, Electron spectroscopy, chemistry, Chemical engineering, X-ray photoelectron spectroscopy, Mechanics of Materials, 0103 physical sciences, Materials Chemistry, engineering, 0210 nano-technology, Chemical composition
Abstract

The microstructure, chemical composition and phase constitution of the surface film formed on molten Mg-2.82Nd-0.45Zn-0.32Zr alloy in an open melting furnace under a protective gas mixture of 3% SO 2 and 97% CO 2 at temperatures 983–1053 K were investigated, using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) with energy dispersive spectrometer (EDS) techniques. Based on the test results and thermodynamic calculations, the protection mechanism was presented in this paper. The gas mixture provided an effective protection for the Mg alloy melt through forming a continuous and dense surface film of MgO, MgSO 4 , Nd 2 O 3 and ZrO 2 . While the formation of surface Nd 2 O 3 and MgSO 4 film provided protection to the melt at low temperatures (about 983 K), and the surface C and ZrO 2 coupled with inner enrichment of Nd improved the protective effect of the film at high temperatures (around 1053 K).

Published
2017

30. Research on the steering characteristics of the crawler robot based on the gyroscope

Author

G.C. Ren, Y.Q. Bao, Y.C. Du, C.S. Ai, and H.H. Liu

Subjects
Chassis, law, Computer science, Ground, Range (aeronautics), Robot, Gyroscope, DSPACE, Web crawler, Rotation (mathematics), Simulation, law.invention
Abstract

The crawler robot has the advantages of small grounding pressure, wide supporting area and better maneuvering characteristics; it is suitable for working in complex environments such as soft ground and muddy roads. But achieving accurate steering control of crawler robots is still a technical problem when the crawler is used as the robot moving chassis. According to the theory of steering dynamics, we analyzed the steering characteristics of the crawler robot and knew that the current output from the motor on both sides of the crawler affects the longitudinal speed, lateral speed and steering angle of the crawler robot. Therefore, we designed the detailed scheme of the crawler robot steering control system and achieved control of the current output from the motor on both sides of the crawler based on the dSPACE hardware-in-the-loop simulation control platform. Considering the gyroscope as the steering control angle detection component, it plays a key role in the accuracy and rapidity of the steering angle control in the robot steering control. So, we designed the gyroscope dynamic performance test system and the specific experiment for the gyroscope rotation dynamics. The experimental results show that the steady-state error of the gyroscope angle is 0.8 degree. The error range can meet the measurement requirements of the steering angle of the crawler robot, and precise control of the robot steering can be realized.

Published
2019

31. Nanosheet-assembled 3D flower-like MoS2/NiCo(OH)2CO3 composite for enhanced supercapacitor performance

Author

Xiaobao Xie, Xianying Wang, H.H. Liu, Menglong Wang, P. Qi, and A.Y. Chen

Subjects
Supercapacitor, Materials science, Scanning electron microscope, Mechanical Engineering, Composite number, Metals and Alloys, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Microstructure, 01 natural sciences, 0104 chemical sciences, symbols.namesake, X-ray photoelectron spectroscopy, Chemical engineering, Mechanics of Materials, Transmission electron microscopy, Materials Chemistry, symbols, 0210 nano-technology, Raman spectroscopy, Nanosheet
Abstract

3D flower-like MoS2/NiCo(OH)2CO3 (MoS2/NiCoHC) composites are synthesized by a hydrothermal method using MoS2 nanospheres as precursors. The microstructure of the composite is characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. The MoS2 nanospheres are served as nucleating agent to trigger the formation of NiCoHC nanosheets, which self-assemble into 3D flower-like MoS2/NiCoHC particles. The MoS2/NiCoHC composites exhibit a high supercapacitive performance with a specific capacity of 583 C g−1 (1296 F g−1) at 1 A g −1 and a long-term cycling stability by retaining 94.3% after 2000 cycles in 2 M KOH. Moreover, the asymmetric supercapacitor of MoS2/NiCoHC as the positive electrode and commercial active carbon as the negative electrode achieves a high power density of 375 W kg−1 at 16.4 Wh kg−1. The enhanced performance of the MoS2/NiCoHC composite can be attributed to the larger surface area provided by 3D flower-like structure and the synergy of the two hybrids.

Published
2021

34. Measurement of cross sections of the interactions e+e−→ ϕϕω and e+e−→ ϕϕϕ at center-of-mass energies from 4.008 to 4.600 GeV

Author

M. Ablikim, M.N. Achasov, S. Ahmed, X.C. Ai, O. Albayrak, M. Albrecht, D.J. Ambrose, A. Amoroso, F.F. An, Q. An, J.Z. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D.W. Bennett, J.V. Bennett, N. Berger, M. Bertani, D. Bettoni, J.M. Bian, F. Bianchi, E. Boger, I. Boyko, R.A. Briere, H. Cai, X. Cai, O. Cakir, A. Calcaterra, G.F. Cao, S.A. Cetin, J. Chai, J.F. Chang, G. Chelkov, G. Chen, H.S. Chen, J.C. Chen, M.L. Chen, S. Chen, S.J. Chen, X. Chen, X.R. Chen, Y.B. Chen, X.K. Chu, G. Cibinetto, H.L. Dai, J.P. Dai, A. Dbeyssi, D. Dedovich, Z.Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, Y. Ding, C. Dong, J. Dong, L.Y. Dong, M.Y. Dong, Z.L. Dou, S.X. Du, P.F. Duan, J.Z. Fan, J. Fang, S.S. Fang, X. Fang, Y. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C.Q. Feng, E. Fioravanti, M. Fritsch, C.D. Fu, Q. Gao, X.L. Gao, Y. Gao, Z. Gao, I. Garzia, K. Goetzen, L. Gong, W.X. Gong, W. Gradl, M. Greco, M.H. Gu, Y.T. Gu, Y.H. Guan, A.Q. Guo, L.B. Guo, R.P. Guo, Y. Guo, Y.P. Guo, Z. Haddadi, A. Hafner, S. Han, X.Q. Hao, F.A. Harris, K.L. He, F.H. Heinsius, T. Held, Y.K. Heng, T. Holtmann, Z.L. Hou, C. Hu, H.M. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Huang, T. Hussain, W. Ikegami Andersson, Q. Ji, Q.P. Ji, X.B. Ji, X.L. Ji, L.W. Jiang, X.S. Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, S. Jin, T. Johansson, A. Julin, N. Kalantar-Nayestanaki, X.L. Kang, X.S. Kang, M. Kavatsyuk, B.C. Ke, P. Kiese, R. Kliemt, B. Kloss, O.B. Kolcu, B. Kopf, M. Kornicer, A. Kupsc, W. Kühn, J.S. Lange, M. Lara, P. Larin, H. Leithoff, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, H.B. Li, H.J. Li, J.C. Li, Jin Li, K. Li, Lei Li, P.R. Li, Q.Y. Li, T. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Y.B. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, F.H. Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Z.A. Liu, Zhiqing Liu, H. Loehner, Y.F. Long, X.C. Lou, H.J. Lu, J.G. Lu, Y. Lu, Y.P. Lu, C.L. Luo, M.X. Luo, T. Luo, X.L. Luo, X.R. Lyu, F.C. Ma, H.L. Ma, L.L. Ma, M.M. Ma, Q.M. Ma, T. Ma, X.N. Ma, X.Y. Ma, Y.M. Ma, F.E. Maas, M. Maggiora, Q.A. Malik, Y.J. Mao, Z.P. Mao, S. Marcello, J.G. Messchendorp, G. Mezzadri, J. Min, T.J. Min, R.E. Mitchell, X.H. Mo, Y.J. Mo, C. Morales Morales, G. Morello, N.Yu. Muchnoi, H. Muramatsu, P. Musiol, Y. Nefedov, F. Nerling, I.B. Nikolaev, Z. Ning, S. Nisar, S.L. Niu, X.Y. Niu, S.L. Olsen, Q. Ouyang, S. Pacetti, Y. Pan, P. Patteri, M. Pelizaeus, H.P. Peng, K. Peters, J. Pettersson, J.L. Ping, R.G. Ping, R. Poling, V. Prasad, H.R. Qi, M. Qi, S. Qian, C.F. Qiao, L.Q. Qin, N. Qin, X.S. Qin, Z.H. Qin, J.F. Qiu, K.H. Rashid, C.F. Redmer, M. Ripka, G. Rong, Ch. Rosner, X.D. Ruan, A. Sarantsev, M. Savrié, C. Schnier, K. Schoenning, W. Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, S. Sosio, S. Spataro, G.X. Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, I. Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, W. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, Zongyuan Wang, T. Weber, D.H. Wei, P. Weidenkaff, S.P. Wen, U. Wiedner, M. Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Z.J. Xiao, Y.G. Xie, Y.H. Xie, Q.L. Xiu, G.F. Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, X.P. Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, H.X. Yang, L. Yang, Y.X. Yang, M. Ye, M.H. Ye, J.H. Yin, Z.Y. You, B.X. Yu, C.X. Yu, J.S. Yu, C.Z. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, H.Y. Zhang, J. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, J.Y. Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.N. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, M.G. Zhao, Q. Zhao, Q.W. Zhao, S.J. Zhao, T.C. Zhao, Y.B. Zhao, Z.G. Zhao, A. Zhemchugov, B. Zheng, J.P. Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, K.J. Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, J. Zhuang, L. Zotti, B.S. Zou, J.H. Zou, and İstanbul Arel Üniversitesi

Subjects
Nuclear and High Energy Physics, BESIII, детектор, e+e- annihilation, Electron–positron annihilation, 01 natural sciences, NO, law.invention, Nuclear physics, Cross section (physics), law, 0103 physical sciences, Cross section, e+e−annihilation, Triple quarkonia, 010306 general physics, Collider, Physics, Annihilation, 010308 nuclear & particles physics, e+e− annihilation, lcsh:QC1-999, BEPCII, коллайдер, e+e? annihilation, Center of mass, lcsh:Physics
Abstract

Using data samples collected with the BESIII detector at the BEPCII collider at six center-of-mass energies between 4.008 and 4.600 GeV, we observe the processes e + e − → ϕ ϕ ω and e + e − → ϕ ϕ ϕ . The Born cross sections are measured and the ratio of the cross sections σ ( e + e − → ϕ ϕ ω ) / σ ( e + e − → ϕ ϕ ϕ ) is estimated to be 1.75 ± 0.22 ± 0.19 averaged over six energy points, where the first uncertainty is statistical and the second is systematic. The results represent first measurements of these interactions.

Published
2017

35. Measurement of the D→K−π+ strong phase difference in ψ(3770)→D0D¯0

Author

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

Subjects
Phase difference, Physics, Nuclear and High Energy Physics, media_common.quotation_subject, Electron–positron annihilation, Quantum mechanics, Analytical chemistry, Pi, CP violation, 7. Clean energy, Asymmetry, media_common
Abstract

We study D 0 D ¯ 0 pairs produced in e + e − collisions at s = 3.773 GeV using a data sample of 2.92 fb−1 collected with the BESIII detector. We measured the asymmetry A K π CP of the branching fractions of D → K − π + in CP-odd and CP-even eigenstates to be ( 12.7 ± 1.3 ± 0.7 ) × 10 − 2 . A K π CP can be used to extract the strong phase difference δ K π between the doubly Cabibbo-suppressed process D ¯ 0 → K − π + and the Cabibbo-favored process D 0 → K − π + . Using world-average values of external parameters, we obtain cos δ K π = 1.02 ± 0.11 ± 0.06 ± 0.01 . Here, the first and second uncertainties are statistical and systematic, respectively, while the third uncertainty arises from the external parameters. This is the most precise measurement of δ K π to date.

Published
2014

36. Hot compression deformation of an Mg–2.54Nd–0.26Zn–0.32Zr alloy

Author

H.H. Liu, J. F. Du, Z. L. Ning, Jingxue Sun, and F.Y. Cao

Subjects
Self-diffusion, Materials science, Alloy, Constitutive equation, Metallurgy, Metals and Alloys, Activation energy, engineering.material, Atmospheric temperature range, Strain rate, Condensed Matter Physics, Microstructure, law.invention, Optical microscope, law, Materials Chemistry, engineering, Physical and Theoretical Chemistry, Composite material
Abstract

The hot compression deformation of an Mg–2.54Nd–0.26Zn–0.32Zr cast alloy was investigated in the 25–400°C temperature range at initial strain rates from 10−4 s−1 to 10−2 s−1. It was found that strain rate has little effect on true stress when the material was compressed below 250°C. Above this temperature, high strain rates resulted in an increased true stress. The average strain rate sensitivity exponent at higher temperature (300–400°C) was determined to be 0.24 and the calculated activation energy was 185 kJ · mol−1, which is higher than that of lattice self diffusion of pure Mg. The constitutive equation was established and the Zener-Hollomon parameter was calculated as a function of peak stress. The microstructure of a sample tested at 300°C was analyzed by optical microscopy.

Published
2013

37. The effect of grain size on the tensile and creep properties of Mg–2.6Nd–0.35Zn–xZr alloys at 250°C

Author

Z. L. Ning, H.H. Liu, S.T. Wang, Jingxue Sun, Ma Qian, and F.Y. Cao

Subjects
Equiaxed crystals, Materials science, Mechanical Engineering, Metallurgy, Alloy, engineering.material, Condensed Matter Physics, Grain size, Grain growth, Creep, Mechanics of Materials, Ultimate tensile strength, engineering, General Materials Science, Grain boundary, Ductility
Abstract

A systematic study has been made of the effect of grain size on the tensile and creep properties of Mg-2.6Nd-0.35Zn-xZr (in wt%) alloys (ML10 or ZM6) at 250. °C, the maximum long-service temperature for these alloys. Grain sizes ranging from 102 to 920. μm were produced in the T6 state after grain refinement with Zr. The sand cast Mg-2.6Nd-0.35Zn alloy solidified as largely columnar grains (900±430. μm). An addition of 1.8% Zr reduced the grain size to 84. μm but most grains were still irregular rather than equiaxed. The grain size increased linearly with 1/Q (Q: growth restriction factor) calculated from the soluble Zr content only. Significant grain hexagonalization occurred during solid solution treatment at 530. °C (720. min). Both the yield strength and ultimate tensile strength at 250. °C followed the Hall-Petch relationship while the ductility increased linearly with decreasing grain size. The steady-state creep rate at 250. °C increased significantly with decreasing grain size but followed the general power law at each stress level evaluated (50-90. MPa). The effect of grain size on creep is related to the applied stress where the grain size effect exponent p showed a linear dependency on applied stress. To satisfy the requirements for both the tensile and creep properties at 250. °C, the T6 grain size of these alloys should be limited to about 174. μm. However, when the T6 grain size is

Published
2013

39. Precision measurement of the branching fractions of J/ψ→π+π−π0 and ψ′→π+π−π0

Author

M. Ablikim, M.N. Achasov, D. Alberto, D.J. Ambrose, F.F. An, Q. An, Z.H. An, J.Z. Bai, R.B.F. Baldini 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, I. Denysenko, M. Destefanis, W.M. Ding, Y. Ding, L.Y. Dong, M.Y. Dong, S.X. Du, 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, 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, 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, K. Liu, K.Y. Liu, Q. Liu, S.B. Liu, X. Liu, X.H. Liu, Y.B. Liu, Yong 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, 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, N.Yu. Muchnoi, Y. Nefedov, 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, C.S.J. Pun, M. Qi, S. Qian, C.F. Qiao, X.S. 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, Q.G. Wen, S.P. Wen, M.W. Werner, U. Wiedner, L.H. Wu, N. 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, 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.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, 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, 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

Subjects
Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Analytical chemistry, Dalitz plot, Branching (polymer chemistry), 01 natural sciences, Nuclear physics, 0103 physical sciences, Pi, Mass spectrum, 010306 general physics
Abstract

We study the decays of the J / ψ and ψ ′ mesons to π + π − π 0 using data samples at both resonances collected with the BES III detector in 2009. We measure the corresponding branching fractions with unprecedented precision and provide mass spectra and Dalitz plots. The branching fraction for J / ψ → π + π − π 0 is determined to be ( 2.137 ± 0.004 ( stat. ) − 0.056 + 0.058 ( syst. ) − 0.026 + 0.027 ( norm. ) ) × 10 − 2 , and the branching fraction for ψ ′ → π + π − π 0 is measured as ( 2.14 ± 0.03 ( stat. ) − 0.07 + 0.08 ( syst. ) − 0.08 + 0.09 ( norm. ) ) × 10 − 4 . The J / ψ decay is found to be dominated by an intermediate ρ ( 770 ) state, whereas the ψ ′ decay is dominated by di-pion masses around 2.2 GeV/ c 2 , leading to strikingly different Dalitz distributions.

Published
2012

40. Effect of Melting Process on Zr Content and Grain Refinement in ZE41A Alloy

Author

Yu Chen Zhang, Zhiliang Ning, F.Y. Cao, Jian Fei Sun, and H.H. Liu

Subjects
Materials science, Scientific method, Alloy, Metallurgy, Content (measure theory), General Engineering, engineering, engineering.material, Isothermal process, Grain size, Melt temperature
Abstract

The effects of melting process on Zr content and grain size in ZE41A alloy were investigated in this study. The results show that the soluble Zr increases with the increased addition content of Mg-Zr master, up to 0.87%. The ratio of Zr addition content to soluble Zr content changes within 3.86-4.8. The melt temperature has little effect on soluble Zr content. Grain size grows and both soluble Zr and total Zr decrease with the prolonged isothermal holding of the melt.

Published
2011

41. Effects of Nd on microstructures and properties at the elevated temperature of a Mg–0.3Zn–0.32Zr alloy

Author

Zhiliang Ning, Hao Wang, Jian Fei Sun, F.Y. Cao, H.H. Liu, and S.T. Wang

Subjects
Materials science, Metallurgy, Alloy, Ultimate tensile strength, engineering, Grain boundary, engineering.material, Dislocation, Microstructure, Grain size, Grain boundary strengthening, Diffractometer
Abstract

The effects of Nd addition on the microstructures and mechanical properties at elevated temperatures of a Mg–0.3Zn–0.32Zr alloy were investigated in this study. The grain sizes of Mg–0.3Zn–0.32Zr alloys were decreased from 120 lm to 76 lm and grain morphologies were changed from hexahedron to rosette-like by increasing Nd addition from 0.21% to 2.65%. Both Nd and Zn are fully dissolved into the Mg matrix when Nd addition is less than 0.84% and the as-cast structure consists of only a-Mg. Increasing Nd concentration over 1.62%, intermetalitics Mg12(Nd,Zn) phase confirmed by X-ray diffractometer (XRD) occurs at the grain boundaries and triple grain boundaries. The heat treatment results in the Nd fully dissolved and then re-precipitated as Mg12(Nd,Zn), distributing as cluster within the grains and along the grain boundaries. The heat treatment also results in some grain coarsening, and Nd acts as effective barriers for the grain agglomeration. The existing of Mg12(Nd,Zn) phase within the grains and along the grain boundaries for the alloys containing high Nd acts to lock the grain boundaries and reduce grain boundary and dislocation sliding, leading to obvious improvements both in tensile strength and yield strength as well as a slight decrease in elongation at elevated temperatures.

Published
2010

42. Part V Charm Physics — Bibliography

Author

H.Y. Cheng, Ikaros I.Y. Bigi, K. L. He, Hai-Bo Li, Sébastien Descotes-Genon, S.S. Sun, Ya-Dong Yang, H.H. Liu, Jiaheng Zou, J.C. Chen, Stephane T'Jampens, D. M. Asner, G. Rong, H.L. Ma, M.Z. Yang, Jérôme Charles, D.Y. Zhang, M. Zhong, M. Yang, Lydia Roos, Y.L. Wu, J. Liu, and Z. Z. Xing

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Bibliography, Astronomy and Astrophysics, Charm (quantum number), Atomic and Molecular Physics, and Optics
Abstract

References

Published
2009

43. Direct measurements of the cross sections for e+e−→hadrons|non-DD¯ in the range from 3.65 to 3.87 GeV and the branching fraction for ψ(3770)→non-DD¯

Author

M. Ablikim, J.Z. Bai, Y. Ban, X. Cai, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, Y.B. Chen, Y.P. Chu, Y.S. Dai, L.Y. Diao, Z.Y. Deng, Q.F. Dong, S.X. Du, J. Fang, S.S. Fang, C.D. Fu, C.S. Gao, Y.N. Gao, S.D. Gu, Y.T. Gu, Y.N. Guo, K.L. He, M. He, Y.K. Heng, J. Hou, H.M. Hu, J.H. Hu, T. Hu, G.S. Huang, X.T. Huang, X.B. Ji, X.S. Jiang, X.Y. Jiang, J.B. Jiao, D.P. Jin, S. Jin, Y.F. Lai, G. Li, H.B. Li, J. Li, R.Y. Li, S.M. Li, W.D. Li, W.G. Li, X.L. Li, X.N. Li, X.Q. Li, Y.F. Liang, H.B. Liao, B.J. Liu, C.X. Liu, F. Liu, Fang Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, Q. Liu, R.G. Liu, Z.A. Liu, Y.C. Lou, F. Lu, G.R. Lu, J.G. Lu, C.L. Luo, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, Z.P. Mao, X.H. Mo, J. Nie, R.G. Ping, N.D. Qi, H. Qin, J.F. Qiu, Z.Y. Ren, G. Rong, X.D. Ruan, L.Y. Shan, L. Shang, D.L. Shen, X.Y. Shen, H.Y. Sheng, H.S. Sun, S.S. Sun, Y.Z. Sun, Z.J. Sun, X. Tang, G.L. Tong, D.Y. Wang, L. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, W.F. Wang, Y.F. Wang, Z. Wang, Z.Y. Wang, Zheng Wang, C.L. Wei, D.H. Wei, Y. Weng, N. Wu, X.M. Xia, X.X. Xie, G.F. Xu, X.P. Xu, Y. Xu, M.L. Yan, H.X. Yang, Y.X. Yang, M.H. Ye, Y.X. Ye, G.W. Yu, C.Z. Yuan, Y. Yuan, S.L. Zang, Y. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.Q. Zhang, H.Y. Zhang, J.W. Zhang, J.Y. Zhang, S.H. Zhang, X.Y. Zhang, Yiyun Zhang, Z.X. Zhang, Z.P. Zhang, D.X. Zhao, J.W. Zhao, M.G. Zhao, P.P. Zhao, W.R. Zhao, H.Q. Zheng, J.P. Zheng, Z.P. Zheng, L. Zhou, K.J. Zhu, Q.M. Zhu, Y.C. Zhu, Y.S. Zhu, Z.A. Zhu, B.A. Zhuang, X.A. Zhuang, and B.S. Zou

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Branching fraction, Electron–positron annihilation, Hadron
Abstract

By tagging the largest energy of the assumed kaon in the final states of e + e − → hadrons , we measured the cross sections for e + e − → hadrons | non- D D ¯ in the range from 3.65 to 3.87 GeV. Analyzing these cross sections yields the branching fraction for the decay ψ ( 3770 ) → non- D D ¯ to be BF [ ψ ( 3770 ) → non- D D ¯ ] = ( 15.1 ± 5.6 ± 1.8 ) % , and the observed non- D D ¯ and D D ¯ cross sections to be σ had-non- D D ¯ obs = ( 1.08 ± 0.40 ± 0.15 ) nb and σ D D ¯ obs = ( 6.07 ± 0.40 ± 0.35 ) nb , respectively, at the center-of-mass energy E cm = 3.7724 GeV .

Published
2008

44. Production of σ in ψ(2S)→π+π−J/ψ

Author

M. Ablikim, J.Z. Bai, Y. Ban, X. Cai, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, Y.B. Chen, S.P. Chi, Y.P. Chu, X.Z. Cui, Y.S. Dai, L.Y. Diao, Z.Y. Deng, Q.F. Dong, S.X. Du, J. Fang, S.S. Fang, C.D. Fu, C.S. Gao, Y.N. Gao, S.D. Gu, Y.T. Gu, Y.N. Guo, Y.Q. Guo, Z.J. Guo, F.A. Harris, K.L. He, M. He, Y.K. Heng, H.M. Hu, T. Hu, G.S. Huang, X.T. Huang, X.B. Ji, X.S. Jiang, X.Y. Jiang, J.B. Jiao, D.P. Jin, S. Jin, Yi Jin, Y.F. Lai, 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.N. Li, X.Q. Li, Y.L. Li, Y.F. Liang, H.B. Liao, B.J. Liu, C.X. Liu, F. Liu, Fang Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, Q. Liu, R.G. Liu, Z.A. Liu, Y.C. Lou, F. Lu, G.R. Lu, J.G. Lu, C.L. Luo, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, X.B. Ma, Z.P. Mao, X.H. Mo, J. Nie, S.L. Olsen, H.P. Peng, R.G. Ping, N.D. Qi, H. Qin, J.F. Qiu, Z.Y. Ren, G. Rong, L.Y. Shan, L. Shang, C.P. Shen, D.L. Shen, X.Y. Shen, H.Y. Sheng, H.S. Sun, J.F. Sun, S.S. Sun, Y.Z. Sun, Z.J. Sun, Z.Q. Tan, X. Tang, G.L. Tong, G.S. Varner, D.Y. Wang, L. Wang, L.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 Wang, C.L. Wei, D.H. Wei, N. Wu, X.M. Xia, X.X. Xie, G.F. Xu, X.P. Xu, Y. Xu, M.L. Yan, H.X. Yang, Y.X. Yang, M.H. Ye, Y.X. Ye, Z.Y. Yi, G.W. Yu, C.Z. Yuan, J.M. Yuan, Y. Yuan, S.L. Zang, Y. Zeng, Yu Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.Q. Zhang, H.Y. Zhang, J.W. Zhang, J.Y. Zhang, S.H. Zhang, X.M. Zhang, X.Y. Zhang, Yiyun Zhang, Z.P. Zhang, D.X. Zhao, J.W. Zhao, M.G. Zhao, P.P. Zhao, W.R. Zhao, Z.G. Zhao, H.Q. Zheng, J.P. Zheng, Z.P. Zheng, L. Zhou, N.F. Zhou, K.J. Zhu, Q.M. Zhu, Y.C. Zhu, Y.S. Zhu, Yingchun Zhu, Z.A. Zhu, B.A. Zhuang, X.A. Zhuang, and B.S. Zou

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Electron–positron annihilation, Mass spectrum, Pi, Sigma, Resonance, High Energy Physics::Experiment, Production (computer science), Helicity
Abstract

Using 14M psi(2S) events accumulated by BESII at the BEPC, a covariant helicity amplitude analysis is performed for psi(2S) -> pi(+)pi(-)J/psi, J/psi -> mu(+)mu(-). The pi(+)pi(-) mass spectrum, distinctly different from phase space, suggests or production in this process. Two different theoretical schemes are used in the global fit to the data. The results are consistent with the existence of the sigma. The sigma pole position is determined to be (552(-106)(+84) -i(232(-72)(+81)) MeV/c(2). (c) 2006 Elsevier B.V. All rights reserved.

Published
2007

45. Capacitance–Voltage and Current–Voltage Measurements of Nitride Light-Emitting Diodes

Author

W.C. Lien, N. C. Chen, H.H. Liu, and Y.S. Wang

Subjects
Materials science, Dopant, business.industry, Electron, Nitride, Capacitance, Electronic, Optical and Magnetic Materials, law.invention, Active layer, Depletion region, law, Optoelectronics, Electrical and Electronic Engineering, business, Light-emitting diode, Diode
Abstract

Capacitance-voltage (C-V ) and current-voltage (I-V) characteristics of nitride light-emitting diodes were measured. The apparent carrier distributions obtained from the C-V curves yielded much information about the samples, including information about the presence of acceptor-like defects in the active layer and the problem of electron overflow. The inconsistency between the experimental and simulated I-V curves also supported the presence of the defects. After compensating the acceptor-like defects by Si dopants and adjusting the overlap between the depletion region and the light-emitting structure, device performance was improved.

Published
2007

46. Measurements of branching fractions for inclusive K¯0/K0 and K∗(892)∓ decays of neutral and charged D mesons

Author

M. Ablikim, J.Z. Bai, Y. Ban, J.G. Bian, X. Cai, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, Y.B. Chen, S.P. Chi, Y.P. Chu, X.Z. Cui, Y.S. Dai, L.Y. Diao, Z.Y. Deng, Q.F. Dong, S.X. Du, J. Fang, S.S. Fang, C.D. Fu, C.S. Gao, Y.N. Gao, S.D. Gu, Y.T. Gu, Y.N. Guo, Y.Q. Guo, K.L. He, M. He, Y.K. Heng, H.M. Hu, T. Hu, G.S. Huang, X.T. Huang, X.B. Ji, X.S. Jiang, X.Y. Jiang, J.B. Jiao, D.P. Jin, S. Jin, Yi Jin, Y.F. Lai, 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.N. Li, X.Q. Li, Y.L. Li, Y.F. Liang, H.B. Liao, B.J. Liu, C.X. Liu, F. Liu, Fang Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, Q. Liu, R.G. Liu, Z.A. Liu, Y.C. Lou, F. Lu, G.R. Lu, J.G. Lu, C.L. Luo, F.C. Ma, H.L. Ma, L.L. Ma, Q.M. Ma, X.B. Ma, Z.P. Mao, X.H. Mo, J. Nie, H.P. Peng, R.G. Ping, N.D. Qi, H. Qin, J.F. Qiu, Z.Y. Ren, G. Rong, L.Y. Shan, L. Shang, C.P. Shen, D.L. Shen, X.Y. Shen, H.Y. Sheng, H.S. Sun, J.F. Sun, S.S. Sun, Y.Z. Sun, Z.J. Sun, Z.Q. Tan, X. Tang, G.L. Tong, D.Y. Wang, L. Wang, L.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 Wang, C.L. Wei, D.H. Wei, N. Wu, X.M. Xia, X.X. Xie, G.F. Xu, X.P. Xu, Y. Xu, M.L. Yan, H.X. Yang, Y.X. Yang, M.H. Ye, Y.X. Ye, Z.Y. Yi, G.W. Yu, C.Z. Yuan, J.M. Yuan, Y. Yuan, S.L. Zang, Y. Zeng, Yu Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.Q. Zhang, H.Y. Zhang, J.W. Zhang, J.Y. Zhang, S.H. Zhang, X.M. Zhang, X.Y. Zhang, Yiyun Zhang, Z.P. Zhang, D.X. Zhao, J.W. Zhao, M.G. Zhao, P.P. Zhao, W.R. Zhao, Z.G. Zhao, H.Q. Zheng, J.P. Zheng, Z.P. Zheng, L. Zhou, N.F. Zhou, K.J. Zhu, Q.M. Zhu, Y.C. Zhu, Y.S. Zhu, Yingchun Zhu, Z.A. Zhu, B.A. Zhuang, X.A. Zhuang, and B.S. Zou

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Meson, Analytical chemistry, Branching (polymer chemistry)
Abstract

Using the data sample of about 33 pb(-1) collected at and around 3.773 GeV with the BES-II detector at the BEPC collider, we have studied inclusive (K) over bar (0)/K-0 and K*(892) -/+ decays of D-0 and D+ mesons. The branching fractions for the inclusive (K) over bar (0)/K-0 and K*(892)(-) decays are measured to be BF(D-0, (K) over bar (0)/(KX)-X-0) = (47.6 +/- 14.8 +/- 3.0)%, BF(D-0 -> (KX)-X-0) = (60.5 +/- 15.5 +/- 3.3)%, BF(D-0, K*X-) = (15.3 +/- 8.3 +/- 1.9)% and BF(D+ -> K*X-) = (5.7 +/- 5.2 +/- 0.7)%. The upper limits of the branching fractions for the inclusive K*(892)(+) decays are set to be BF(D-0 -> K*+X) K*X+) < 20.3% at 90% confidence level. (c) 2006 Elsevier B.V. All rights reserved.

Published
2006

47. A flattening filter free photon treatment concept evaluation with Monte Carlo

Author

Uwe Titt, H.H. Liu, Falk Pönisch, Radhe Mohan, Oleg N Vassiliev, and Lei Dong

Subjects
Physics, Photon, Optics, business.industry, Monte Carlo method, Dosimetry, General Medicine, Irradiation, business, Intensity modulation, Fluence, Beam (structure), Linear particle accelerator
Abstract

In principle, the concept of flat initial radiation-dose distribution across the beam is unnecessary for intensity modulated radiation therapy. Dynamic leaf positioning during irradiation could appropriately adjust the fluence distribution of an unflattened beam that is peaked in the center and deliver the desired uniform or nonuniform dose distribution. Removing the flattening filter could lead to reduced treatment time through higher dose rates and reduced scatter, because there would be substantially less material in the beam; and possibly other dosimetric and clinical advantages. This work aims to evaluate the properties of a flattening filter free clinical accelerator and to investigate its possible advantages in clinical intensity modulated radiation therapy applications by simulating a Varian 2100-based treatment delivery system with Monte Carlo techniques. Several depth-dose curves and lateral dose distribution profiles have been created for various field sizes, with and without the flattening filter. Data computed with this model were used to evaluate the overall quality of such a system in terms of changes in dose rate, photon and electron fluence, and reduction in out-of-field stray dose from the scattered components and were compared to the corresponding data for a standard treatment head with a flattening filter. The results of the simulations of the flattening filter free system show that a substantial increase in dose rate can be achieved, which would reduce the beam on time and decrease the out-of-field dose for patients due to reduced head-leakage dose. Also close to the treatment field edge, a significant improvement in out-of-field dose could be observed for small fields, which can be attributed to the change in the photon spectra, when the flattening filter is removed from the beamline.

Published
2006

48. First observation of χcJ→ωω decays

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Omega
Abstract

Decays of $\chi_{c0,2}\ar\ww$ are observed for the first time using a sample of $14.0\times 10^6$ $\psi(2S)$ events collected with the BESII detector. The branching ratios are determined to be ${\cal B}(\chi_{c0}\ar \ww)=(2.29\pm 0.58\pm 0.41)\times 10^{-3}$ and ${\cal B}(\chi_{c2}\ar\ww)=(1.77\pm 0.47\pm 0.36)\times 10^{-3}$, where the first errors are statistical and the second systematic. The significances of the two signals are $4.4\sigma$ and $4.7\sigma$, respectively.

Published
2005

49. Measurements of Cabibbo-suppressed hadronic decay fractions of charmed D0 and D+ mesons

Author

M. Ablikim, J.Z. Bai, Y. Ban, J.G. Bian, X. Cai, J.F. Chang, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, Jun Chen, M.L. Chen, Y.B. Chen, S.P. Chi, Y.P. Chu, X.Z. Cui, H.L. Dai, Y.S. Dai, Z.Y. Deng, L.Y. Dong, Q.F. Dong, S.X. Du, Z.Z. Du, J. Fang, S.S. Fang, C.D. Fu, H.Y. Fu, C.S. Gao, Y.N. Gao, M.Y. Gong, W.X. Gong, S.D. Gu, Y.N. Guo, Y.Q. Guo, K.L. He, M. He, X. He, Y.K. Heng, H.M. Hu, T. Hu, X.P. Huang, X.T. Huang, X.B. Ji, C.H. Jiang, X.S. Jiang, D.P. Jin, S. Jin, Y. Jin, Yi Jin, Y.F. Lai, F. Li, G. Li, H.H. Li, J. Li, J.C. Li, Q.J. Li, R.Y. Li, S.M. Li, W.D. Li, W.G. Li, X.L. Li, X.Q. Li, Y.L. Li, Y.F. Liang, H.B. Liao, C.X. Liu, F. Liu, Fang Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, R.G. Liu, Z.A. Liu, Z.X. Liu, F. Lu, G.R. Lu, H.J. Lu, J.G. Lu, C.L. Luo, L.X. Luo, X.L. Luo, F.C. Ma, H.L. Ma, J.M. Ma, L.L. Ma, Q.M. Ma, X.B. Ma, X.Y. Ma, Z.P. Mao, X.H. Mo, J. Nie, Z.D. Nie, H.P. Peng, N.D. Qi, C.D. Qian, H. Qin, J.F. Qiu, Z.Y. Ren, G. Rong, L.Y. Shan, L. Shang, D.L. Shen, X.Y. Shen, H.Y. Sheng, F. Shi, X. Shi, H.S. Sun, J.F. Sun, S.S. Sun, Y.Z. Sun, Z.J. Sun, X. Tang, N. Tao, Y.R. Tian, G.L. Tong, D.Y. Wang, J.Z. Wang, K. Wang, L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, S.Z. Wang, W.F. Wang, Y.F. Wang, Z. Wang, Z.Y. Wang, Zhe Wang, Zheng Wang, C.L. Wei, D.H. Wei, N. Wu, Y.M. Wu, X.M. Xia, X.X. Xie, B. Xin, G.F. Xu, H. Xu, S.T. Xue, M.L. Yan, F. Yang, H.X. Yang, J. Yang, Y.X. Yang, M. Ye, M.H. Ye, Y.X. Ye, L.H. Yi, Z.Y. Yi, C.S. Yu, G.W. Yu, C.Z. Yuan, J.M. Yuan, Y. Yuan, S.L. Zang, Y. Zeng, Yu Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.Y. Zhang, J. Zhang, J.W. Zhang, J.Y. Zhang, Q.J. Zhang, S.Q. Zhang, X.M. Zhang, X.Y. Zhang, Y.Y. Zhang, Yiyun Zhang, Z.P. Zhang, Z.Q. Zhang, D.X. Zhao, J.B. Zhao, J.W. Zhao, M.G. Zhao, P.P. Zhao, W.R. Zhao, X.J. Zhao, Y.B. Zhao, H.Q. Zheng, J.P. Zheng, L.S. Zheng, Z.P. Zheng, X.C. Zhong, B.Q. Zhou, G.M. Zhou, L. Zhou, N.F. Zhou, K.J. Zhu, Q.M. Zhu, Y.C. Zhu, Y.S. Zhu, Yingchun Zhu, Z.A. Zhu, B.A. Zhuang, X.A. Zhuang, and B.S. Zou

Subjects
Hadronic decay, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Branching fraction, Electron–positron annihilation, Hadron, law.invention, Nuclear physics, Positron, law, Pi, Collider
Abstract

Using data collected with the BESII detector at Beijing Electron-Positron Collider, the measurements of relative branchin- fractions for seven Cabibbo-suppressed hadronic weak decays D-0 -> K-K+, pi-pi(+), pi(-)pi(+)pi(-) and pi-pi(+)pi(-), D-divided by -> (K) over bar K-0(divided by), K-K+pi(+) and pi(-),pi(+pi+) are presented. (c) 2005 Elsevier B.V. All rights reserved.

Published
2005

50. Resonances in and

Author

M. Ablikim, J.Z. Bai, Y. Ban, J.G. Bian, D.V. Bugg, X. Cai, J.F. Chang, H.F. Chen, H.S. Chen, H.X. Chen, J.C. Chen, Jin Chen, Jun Chen, M.L. Chen, Y.B. Chen, S.P. Chi, Y.P. Chu, X.Z. Cui, H.L. Dai, Y.S. Dai, Z.Y. Deng, L.Y. Dong, Q.F. Dong, S.X. Du, Z.Z. Du, J. Fang, S.S. Fang, C.D. Fu, H.Y. Fu, C.S. Gao, Y.N. Gao, M.Y. Gong, W.X. Gong, S.D. Gu, Y.N. Guo, Y.Q. Guo, Z.J. Guo, F.A. Harris, K.L. He, M. He, X. He, Y.K. Heng, H.M. Hu, T. Hu, G.S. Huang, X.P. Huang, X.T. Huang, X.B. Ji, C.H. Jiang, X.S. Jiang, D.P. Jin, S. Jin, Y. Jin, Yi Jin, Y.F. Lai, F. Li, G. Li, H.H. Li, J. Li, J.C. Li, Q.J. Li, R.Y. Li, S.M. Li, W.D. Li, W.G. Li, X.L. Li, X.Q. Li, Y.L. Li, Y.F. Liang, H.B. Liao, C.X. Liu, F. Liu, Fang Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, R.G. Liu, Z.A. Liu, Z.X. Liu, F. Lu, G.R. Lu, H.J. Lu, J.G. Lu, C.L. Luo, L.X. Luo, X.L. Luo, F.C. Ma, H.L. Ma, J.M. Ma, L.L. Ma, Q.M. Ma, X.B. Ma, X.Y. Ma, Z.P. Mao, X.H. Mo, J. Nie, Z.D. Nie, S.L. Olsen, H.P. Peng, N.D. Qi, C.D. Qian, H. Qin, J.F. Qiu, Z.Y. Ren, G. Rong, L.Y. Shan, L. Shang, D.L. Shen, X.Y. Shen, H.Y. Sheng, F. Shi, X. Shi, H.S. Sun, J.F. Sun, S.S. Sun, Y.Z. Sun, Z.J. Sun, X. Tang, N. Tao, Y.R. Tian, G.L. Tong, G.S. Varner, D.Y. Wang, J.Z. Wang, K. Wang, L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, S.Z. Wang, W.F. Wang, Y.F. Wang, Z. Wang, Z.Y. Wang, Zhe Wang, Zheng Wang, C.L. Wei, D.H. Wei, Y.M. Wu, X.M. Xia, X.X. Xie, B. Xin, G.F. Xu, H. Xu, S.T. Xue, M.L. Yan, F. Yang, H.X. Yang, J. Yang, Y.X. Yang, M. Ye, M.H. Ye, Y.X. Ye, L.H. Yi, Z.Y. Yi, C.S. Yu, G.W. Yu, C.Z. Yuan, J.M. Yuan, Y. Yuan, S.L. Zang, Y. Zeng, Yu Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.Y. Zhang, J. Zhang, J.W. Zhang, J.Y. Zhang, Q.J. Zhang, S.Q. Zhang, X.M. Zhang, X.Y. Zhang, Y.Y. Zhang, Yiyun Zhang, Z.P. Zhang, Z.Q. Zhang, D.X. Zhao, J.B. Zhao, J.W. Zhao, M.G. Zhao, P.P. Zhao, W.R. Zhao, X.J. Zhao, Y.B. Zhao, Z.G. Zhao, H.Q. Zheng, J.P. Zheng, L.S. Zheng, Z.P. Zheng, X.C. Zhong, B.Q. Zhou, G.M. Zhou, L. Zhou, N.F. Zhou, K.J. Zhu, Q.M. Zhu, Y.C. Zhu, Y.S. Zhu, Yingchun Zhu, Z.A. Zhu, B.A. Zhuang, X.A. Zhuang, and B.S. Zou

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Meson, Electron–positron annihilation, Partial wave analysis, Mass spectrum, Analytical chemistry, Dalitz plot, State (functional analysis), Scalar meson, Bar (unit)
Abstract

A partial wave analysis is presented of J/psi --> phipi(+)pi(-) and phiK(+)K(-) from a sample of 58M J/psi events in the BES II detector. The f(0)(980) is observed clearly in both sets of data, and parameters of the Flatte formula are determined accurately: M = 965 +/- 8(stat) +/- 6(syst) MeV/c(2), g(1) = 165 +/- 10 +/- 15 MeV/c(2), g(2)/g(1) = 4.21 +/- 0.25 +/- 0.21. The phipipi data also exhibit a strong pipi peak centred at M = 1335 MeV/c(2). It may be fitted with f(2)(1270) and a dominant 0(+) signal made from f(0)(1370) interfering with a smaller f(0)(1500) component. There is evidence that the f(0)(1370) signal is resonant, from interference with f(2)(1270). There is also a state in pipi with M = 1790(-30)(+40) MeV/c(2) and Gamma = 270(-30)(+60) MeV/c(2); spin 0 is preferred over spin 2. This state, f(0)(1790), is distinct from f(0)(1710). The phiK (K) over bar data contain a strong peak due to f(2)'(1525). A shoulder on its upper side may be fitted by interference between f(0)(1500) and f(0)(1710). (C) 2004 Elsevier B.V. All rights reserved.

Published
2005

Catalog

Books, media, physical & digital resources
See catalog results