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Article: [Study on assessing early epidemiological parameters of COVID-19 epidemic in China].

Song, Q Q / Zhao, H / Fang, L Q / Liu, W / Zheng, C / Zhang, Y

Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi

2020 Volume 41, Issue 4, Page(s) 461–465

Abstract: Objective: ...

Abstract	Objective:
MeSH term(s)	Basic Reproduction Number ; Betacoronavirus ; COVID-19 ; China/epidemiology ; Coronavirus Infections/epidemiology ; Humans ; Infectious Disease Incubation Period ; Models, Statistical ; Pandemics ; Pneumonia, Viral/epidemiology ; SARS-CoV-2
Keywords	covid19
Language	Chinese
Publishing date	2020-02-27
Publishing country	China
Document type	Journal Article
ZDB-ID	645026-x
ISSN	0254-6450
ISSN	0254-6450
DOI	10.3760/cma.j.cn112338-20200205-00069
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Article: [Study on assessing early epidemiological parameters of COVID-19 epidemic in China]

Song, Q Q / Zhao, H / Fang, L Q / Liu, W / Zheng, C / Zhang, Y

Zhonghua Liu Xing Bing Xue Za Zhi

Abstract: Objective: To study the early dynamics of the epidemic of coronavirus disease (COVID-19) in China from 15 to 31 January, 2020, and estimate the corresponding epidemiological parameters (incubation period, generation interval and basic reproduction number) ...

Abstract	Objective: To study the early dynamics of the epidemic of coronavirus disease (COVID-19) in China from 15 to 31 January, 2020, and estimate the corresponding epidemiological parameters (incubation period, generation interval and basic reproduction number) of the epidemic. Methods: By means of Weibull, Gamma and Lognormal distributions methods, we estimated the probability distribution of the incubation period and generation interval data obtained from the reported COVID-19 cases. Moreover, the AIC criterion was used to determine the optimal distribution. Considering the epidemic is ongoing, the exponential growth model was used to fit the incidence data of COVID-19 from 10 to 31 January, 2020, and exponential growth method, maximum likelihood method and SEIR model were used to estimate the basic reproduction number. Results: Early COVID-19 cases kept an increase in exponential growth manner before 26 January, 2020, then the increase trend became slower. The average incubation period was 5.01 (95%CI: 4.31-5.69) days; the average generation interval was 6.03 (95%CI: 5.20-6.91) days. The basic reproduction number was estimated to be 3.74 (95%CI: 3.63-3.87), 3.16 (95%CI: 2.90-3.43), and 3.91 (95%CI: 3.71-4.11) by three methods, respectively. Conclusions: The Gamma distribution fits both the generation interval and incubation period best, and the mean value of generation interval is 1.02 day longer than that of incubation period. The relatively high basic reproduction number indicates that the epidemic is still serious; Based on our analysis, the turning point of the epidemic would be seen on 26 January, the growth rate would be lower afterwards.
Keywords	covid19
Publisher	WHO
Document type	Article
Note	WHO #Covidence: #32113196
Database	COVID19

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Article: Schwannomas of female genitalia from a gynaecologist's perspective: report of two cases and review of the literature.

Jiang, S / Li, Q S / Sheng, X G / Song, Q Q / Lu, C H / Pan, C X

European journal of gynaecological oncology

2016 Volume 37, Issue 2, Page(s) 254–257

Abstract: Background: Pelvic schwannomas are extremely rare. However, when located in the pelvic cavity, schwannomas are often encountered by a gynaecologist, not a general surgeon, and are misdiagnosed as gynaecologic masses.: Case report: Here, the authors ... ...

Abstract	Background: Pelvic schwannomas are extremely rare. However, when located in the pelvic cavity, schwannomas are often encountered by a gynaecologist, not a general surgeon, and are misdiagnosed as gynaecologic masses. Case report: Here, the authors present two cases of pelvic schwannomas that were preoperatively misdiagnosed as broad ligament fibroid. One schwannoma occurred completely in the left broad ligament and was resected by laparoscopy without any complications. The other lesion was located in the retroperitoneum and had densely adhered to the surrounding tissues; this lesion was excised by laparotomy with considerable blood loss. Conclusions: Schwannomas of female genitalia are very scarce and difficulty to diagnose preoperatively. Literature review revealed 63 schwannomas arising from the female genital tract in total, 73.02% (46 cases) were located in the lower genital tract, and 26.98% (17 cases) were located in upper genital tract. The treatment modality is unique depending on the location of the tumor. Complete excision is benefical for diagnosis and treatment. The procedure can be performed safely under laparoscopy.
MeSH term(s)	Adult ; Broad Ligament/surgery ; Diagnostic Errors ; Female ; Genital Neoplasms, Female/diagnosis ; Genital Neoplasms, Female/surgery ; Humans ; Leiomyoma/diagnosis ; Leiomyoma/surgery ; Middle Aged ; Neurilemmoma/diagnosis ; Neurilemmoma/surgery ; Retroperitoneal Neoplasms/diagnosis ; Retroperitoneal Neoplasms/surgery
Language	English
Publishing date	2016-04-25
Publishing country	China
Document type	Case Reports ; Journal Article ; Review
ZDB-ID	604589-3
ISSN	0392-2936
ISSN	0392-2936
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Article: The effect of group size and stocking density on the welfare and performance of hens housed in furnished cages during summer

Guo, Y.Y / Song, Z.G / Jiao, H.C / Song, Q.Q / Lin, H

Animal welfare. 2012 Feb., v. 21, no. 1

2012

Abstract: The aim of this study was to investigate the effect of group size and stocking density on the welfare and performance of hens housed in furnished cage systems during summer. A total of 924 Hy-Line Brown hens were assigned to three housing systems: a ... ...

Abstract	The aim of this study was to investigate the effect of group size and stocking density on the welfare and performance of hens housed in furnished cage systems during summer. A total of 924 Hy-Line Brown hens were assigned to three housing systems: a standard battery cage system (control, 4 hens per cage and 398 cm2 per hen), two furnished systems (including perches and nest); one with a small (SFC, 21 hens per cage; 586 cm2 per hen) and one with a large group size (LFC, 48 hens per cage; 543 cm2 per hen). The results showed that hens housed in SFC and LFC had a higher feed intake and a poorer feed efficiency compared to control hens. Laying rate and egg weight were not significantly affected by housing systems. Hens housed in LFC and SFC systems showed less sitting and more walking behaviours than control hens. SFC hens showed more nesting and less perching behaviours than LFC hens. Hens kept in SFC systems showed fewer signs of heat stress during summer, with less panting activity than LFC or control hens, and a relatively lower rectal temperature than controls. The rectal temperature of LFC hens did not differ from the SFC hens and controls. Blood concentrations of luteinising hormone, follicle-stimulating hormone and oestradiol were not significantly influenced. In conclusion, group size and stocking density in furnished cages have an effect on behaviour and performance of hens. The furnished cage systems with small group sizes were favourable for hen welfare without markedly affecting performance. Group size should be considered in the development of furnished cage systems.
Keywords	animal welfare ; battery cages ; blood ; breathing ; egg weight ; estradiol ; feed conversion ; feed intake ; follicle-stimulating hormone ; group effect ; group size ; heat stress ; hens ; luteinizing hormone ; nesting ; nests ; stocking rate ; summer ; temperature ; walking
Language	English
Size	p. 41-49.
Publishing place	Universities Federation for Animal Welfare
Document type	Article
ISSN	0962-7286
Database	NAL-Catalogue (AGRICOLA)

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Article: [Influence of SOX10 on the proliferation and invasion of prostate cancer cells].

Tang, X / Zhao, W H / Song, Q Q / Yin, H Q / DU, Y Q / Sheng, Z Z / Wang, Q / Zhang, X W / Li, Q / Liu, S J

Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences

2018 Volume 50, Issue 4, Page(s) 602–606

Abstract: Objective: To explore the influence of SOX10 on the proliferation and invasion of prostate cancer cells.: Methods: SOX10 protein in prostate cancer cell lines PC3, DU145 and LNcap was detected by Western blotting analysis. The expression of SOX10 in ... ...

Abstract	Objective: To explore the influence of SOX10 on the proliferation and invasion of prostate cancer cells. Methods: SOX10 protein in prostate cancer cell lines PC3, DU145 and LNcap was detected by Western blotting analysis. The expression of SOX10 in prostate cancer cell lines (PC3 and DU145) were knocked down by small interfering RNAs, and the efficiency of SOX10 by small interfering RNAs was confirmed using Western blotting analysis. CCK-8 assays were conducted to assess the influences of SOX10 on the proliferation of PC3 and DU145 cells, and invasion assays were conducted to assess the influences of SOX10 on the invasion of PC3 and DU145 cells. Results: After SOX10 in prostate cancer cells was knocked down by small interfering RNAs, the proliferation of prostate cancer cells PC3 and DU145 was significantly inhibited. Results of CCK-8 assays showed that the absorbance of PC3 and DU145 in SOX10-silenced groups was decreased compared with those in control groups (PC3: 0 d: 0.166±0.01, 0.162±0.012 vs. 0.155 ±0.01, P>0.05; 1 d: 0.210±0.011, 0.211±0.018 vs. 0.252±0.023, P>0.05; 2 d: 0.293±0.017, 0.280±0.028 vs. 0.433±0.030, P<0.01; 3 d: 0.363±0.071, 0.411±0.038 vs. 0.754±0.045, P<0.01; 4 d: 0.592±0.065, 0.670±0.093 vs. 1.456±0.111, P<0.01. DU145: 0 d: 0.168±0.018, 0.164±0.01 vs. 0.153 ±0.012, P>0.05; 1 d: 0.218±0.007, 0.206±0.024 vs. 0.255±0.02, P>0.05; 2 d: 0.297±0.013, 0.291±0.012 vs. 0.444±0.023, P<0.05; 3 d: 0.378±0.058, 0.419±0.026 vs. 0.762±0.039, P<0.01; 4 d: 0.681±0.094, 0.618±0.050 vs. 1.419±0.170, P<0.01). Meanwhile, knocking down SOX10 significantly suppressed the invasion of prostate cancer cells PC3 and DU145. Results of invasion assays showed that the numbers of invaded cells in SOX10-silenced groups were significantly less than those in control groups (PC3: 142±38, 171±17 vs. 304±55; DU145: 96±22, 134±23 vs. 341±34, P<0.05). Conclusion: SOX10 might promote prostate cancer progression by accelerating the ability of the proliferation and invasion of prostate cancer cells, and SOX10 might be a potential therapeutic target for prostate cancer.
MeSH term(s)	Cell Line, Tumor ; Cell Proliferation ; Humans ; Male ; Neoplasm Invasiveness ; Prostatic Neoplasms ; RNA, Small Interfering ; SOXE Transcription Factors/physiology
Chemical Substances	RNA, Small Interfering ; SOX10 protein, human ; SOXE Transcription Factors
Language	Chinese
Publishing date	2018-08-20
Publishing country	China
Document type	Journal Article
ISSN	1671-167X
ISSN	1671-167X
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Article ; Online: Genetic diversity and classification of Tibetan yak populations based on the mtDNA COIII gene.

Song, Q Q / Chai, Z X / Xin, J W / Zhao, S J / Ji, Q M / Zhang, C F / Ma, Z J / Zhong, J C

Genetics and molecular research : GMR

2015 Volume 14, Issue 1, Page(s) 1763–1770

Abstract: To determine the level of genetic diversity and phylogenetic relationships among Tibetan yak populations, the mitochondrial DNA cytochrome c oxidase subunit 3 (COIII) genes of 378 yak individuals from 16 populations were analyzed in this study. The ... ...

Abstract	To determine the level of genetic diversity and phylogenetic relationships among Tibetan yak populations, the mitochondrial DNA cytochrome c oxidase subunit 3 (COIII) genes of 378 yak individuals from 16 populations were analyzed in this study. The results showed that the length of cytochrome c oxidase subunit 3 gene sequences was 781 bp, with nucleotide frequencies of 29.2, 29.4, 26.1, and 15.2% for T, C, A, and G, respectively. A total of 26 haplotypes were identified, with 69 polymorphic sites, including 11 parsimony-informative sites and 58 single-nucleotide polymorphism sites. No deletions/insertions were found in sequence comparison, indicating that nucleotide mutation types were transitions and transversions. Haplotype and nucleotide diversities were 0.562 and 0.00138, respectively, indicating a high level of genetic diversity in Tibetan yak populations. Phylogenetic relationship analysis indicated that Tibetan yak populations are divided into 2 groups.
MeSH term(s)	Animals ; Cattle/classification ; Cattle/genetics ; DNA, Mitochondrial/genetics ; Electron Transport Complex IV/genetics ; Evolution, Molecular ; Genetic Variation ; Genetics, Population ; Haplotypes ; Phylogeny ; Phylogeography ; Polymorphism, Single Nucleotide ; Sequence Analysis, DNA ; Tibet
Chemical Substances	DNA, Mitochondrial ; Electron Transport Complex IV (EC 1.9.3.1)
Language	English
Publishing date	2015-03-13
Publishing country	Brazil
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2114039-X
ISSN	1676-5680 ; 1676-5680
ISSN (online)	1676-5680
ISSN	1676-5680
DOI	10.4238/2015.March.13.3
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Article ; Online: Metastasis of a cervical carcinoma to the clitoris.

Jiang, S / Sheng, X G / Song, Q Q / Lu, C H / Pan, C X / Li, Q S

Journal of obstetrics and gynaecology : the journal of the Institute of Obstetrics and Gynaecology

2015 Volume 35, Issue 2, Page(s) 213–214

MeSH term(s)	Carcinoma, Squamous Cell/secondary ; Clitoris ; Female ; Humans ; Middle Aged ; Uterine Cervical Neoplasms/pathology ; Vulvar Neoplasms/secondary
Language	English
Publishing date	2015-02
Publishing country	England
Document type	Case Reports ; Journal Article
ZDB-ID	604639-3
ISSN	1364-6893 ; 0144-3615
ISSN (online)	1364-6893
ISSN	0144-3615
DOI	10.3109/01443615.2014.937335
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Article ; Online: Loop-mediated isothermal amplification (LAMP) assay for detection of Theileria sergenti infection targeting the p33 gene.

Wang, L X / He, L / Fang, R / Song, Q Q / Tu, P / Jenkins, A / Zhou, Y Q / Zhao, J L

Veterinary parasitology

2010 Volume 171, Issue 1-2, Page(s) 159–162

Abstract: Theileria is a widespread, intraerythrocytic tick-borne protozoan parasite. Loop-mediated isothermal amplification (LAMP) is a novel nucleic acid amplification method offering rapid, accurate and cost-effective diagnosis of infectious diseases. In this ... ...

Abstract	Theileria is a widespread, intraerythrocytic tick-borne protozoan parasite. Loop-mediated isothermal amplification (LAMP) is a novel nucleic acid amplification method offering rapid, accurate and cost-effective diagnosis of infectious diseases. In this study, the LAMP method was developed for detecting Theileria sergenti. Four primers were designed from six distinct regions of the target gene, a 33-kDa major piroplasm surface protein (p33) gene in T. sergenti. The specificity assay showed it was specific for T. sergenti whilst the LAMP was able to detect a parasitemia level of 0.000002% which was more sensitive than conventional PCR. 154 field samples from water buffalo and 159 field samples from cattle were analyzed using the LAMP method. About 60.4% (96/159) of cattle samples were positive by LAMP, compared to 30.0% (46/154) of water buffalo samples that were positive. Compared with conventional PCR, the LAMP method exhibited higher detection abilities than conventional PCR. All the results indicated that the LAMP assay is a simple and convenient diagnostic tool for theileriosis.
MeSH term(s)	Animals ; Antigens, Protozoan/chemistry ; Antigens, Protozoan/genetics ; Buffaloes/parasitology ; Cattle ; Cattle Diseases/diagnosis ; Cattle Diseases/epidemiology ; Cattle Diseases/parasitology ; Chi-Square Distribution ; China/epidemiology ; DNA, Protozoan/chemistry ; DNA, Protozoan/genetics ; Nucleic Acid Amplification Techniques/methods ; Nucleic Acid Amplification Techniques/veterinary ; Protozoan Proteins/chemistry ; Protozoan Proteins/genetics ; Theileria/genetics ; Theileria/isolation & purification ; Theileriasis/diagnosis ; Theileriasis/epidemiology ; Theileriasis/parasitology
Chemical Substances	Antigens, Protozoan ; DNA, Protozoan ; Protozoan Proteins ; major piroplasm surface protein, Theileria
Language	English
Publishing date	2010-07-15
Publishing country	Netherlands
Document type	Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	196831-2
ISSN	1873-2550 ; 0304-4017
ISSN (online)	1873-2550
ISSN	0304-4017
DOI	10.1016/j.vetpar.2010.02.046
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Article: Loop-mediated isothermal amplification (LAMP) assay for detection of Theileria sergenti infection targeting the p33 gene

Wang, L.X / He, L / Fang, R / Song, Q.Q / Tu, P / Jenkins, A / Zhou, Y.Q / Zhao, J.L

Veterinary parasitology. 2010 July 15, v. 171, no. 1-2

2010

Abstract	Theileria is a widespread, intraerythrocytic tick-borne protozoan parasite. Loop-mediated isothermal amplification (LAMP) is a novel nucleic acid amplification method offering rapid, accurate and cost-effective diagnosis of infectious diseases. In this study, the LAMP method was developed for detecting Theileria sergenti. Four primers were designed from six distinct regions of the target gene, a 33-kDa major piroplasm surface protein (p33) gene in T. sergenti. The specificity assay showed it was specific for T. sergenti whilst the LAMP was able to detect a parasitemia level of 0.000002% which was more sensitive than conventional PCR. 154 field samples from water buffalo and 159 field samples from cattle were analyzed using the LAMP method. About 60.4% (96/159) of cattle samples were positive by LAMP, compared to 30.0% (46/154) of water buffalo samples that were positive. Compared with conventional PCR, the LAMP method exhibited higher detection abilities than conventional PCR. All the results indicated that the LAMP assay is a simple and convenient diagnostic tool for theileriosis.
Keywords	buffaloes ; cattle ; animal diseases ; Theileria sergenti ; theileriosis ; genes ; disease detection ; tick-borne diseases
Language	English
Dates of publication	2010-0715
Size	p. 159-162.
Publishing place	Amsterdam; New York: Elsevier
Document type	Article
ZDB-ID	196831-2
ISSN	1873-2550 ; 0304-4017
ISSN (online)	1873-2550
ISSN	0304-4017
DOI	10.1016/j.vetpar.2010.02.046
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Article ; Online: Direct Measurement of the Branching Fractions B(ψ(3686)→J/ψX) and B(ψ(3770)→J/ψX), and Observation of the State R(3760) in e^{+}e^{-}→J/ψX.

Ablikim, M / Achasov, M N / Adlarson, P / Ahmed, S / Albrecht, M / Amoroso, A / An, Q / Anita / Bai, Y / Bakina, O / Baldini Ferroli, R / Balossino, I / Ban, Y / Begzsuren, K / Bennett, J V / Berger, N / Bertani, M / Bettoni, D / Bianchi, F /

Biernat, J / Bloms, J / Bortone, A / Boyko, I / Briere, R A / Cai, H / Cai, X / Calcaterra, A / Cao, G F / Cao, N / Cetin, S A / Chang, J F / Chang, W L / Chelkov, G / Chen, D Y / Chen, G / Chen, H S / Chen, M L / Chen, S J / Chen, X R / Chen, Y B / Cheng, W / Cibinetto, G / Cossio, F / Cui, X F / Dai, H L / Dai, J P / Dai, X C / Dbeyssi, A / de Boer, R B / Dedovich, D / Deng, Z Y / Denig, A / Denysenko, I / Destefanis, M / De Mori, F / Ding, Y / Dong, C / Dong, J / Dong, L Y / Dong, M Y / Du, S X / Fang, J / Fang, S S / Fang, Y / Farinelli, R / Fava, L / Feldbauer, F / Felici, G / Feng, C Q / Fritsch, M / Fu, C D / Fu, Y / Gao, X L / Gao, Y / Gao, Y G / Garzia, I / Gersabeck, E M / Gilman, A / Goetzen, K / Gong, L / Gong, W X / Gradl, W / Greco, M / Gu, L M / Gu, M H / Gu, S / Gu, Y T / Guan, C Y / Guo, A Q / Guo, L B / Guo, R P / Guo, Y P / Guskov, A / Han, S / Han, T T / Han, T Z / Hao, X Q / Harris, F A / He, K L / Heinsius, F H / Held, T / Heng, Y K / Himmelreich, M / Holtmann, T / Hou, Y R / Hou, Z L / Hu, H M / Hu, J F / Hu, T / Hu, Y / Huang, G S / Huang, L Q / Huang, X T / Huang, Z / Huesken, N / Hussain, T / Ikegami Andersson, W / Imoehl, W / Irshad, M / Jaeger, S / Janchiv, S / Ji, Q / Ji, Q P / Ji, X B / Ji, X L / Jiang, H B / Jiang, X S / Jiang, X Y / Jiao, J B / Jiao, Z / Jin, S / Jin, Y / Johansson, T / Kalantar-Nayestanaki, N / Kang, X S / Kappert, R / Kavatsyuk, M / Ke, B C / Keshk, I K / Khoukaz, A / Kiese, P / Kiuchi, R / Kliemt, R / Koch, L / Kolcu, O B / Kopf, B / Kuemmel, M / Kuessner, M / Kupsc, A / Kurth, M G / Kühn, W / Lane, J J / Lange, J S / Larin, P / Lavezzi, L / Leithoff, H / Lellmann, M / Lenz, T / Li, C / Li, C H / Li, Cheng / Li, D M / Li, F / Li, G / Li, H B / Li, H J / Li, J L / Li, J Q / Li, Ke / Li, L K / Li, Lei / Li, P L / Li, P R / Li, S Y / Li, W D / Li, W G / Li, X H / Li, X L / Li, Z B / Li, Z Y / Liang, H / Liang, Y F / Liang, Y T / Liao, L Z / Libby, J / Lin, C X / Liu, B / Liu, B J / Liu, C X / Liu, D / Liu, D Y / Liu, F H / Liu, Fang / Liu, Feng / Liu, H B / Liu, H M / Liu, Huanhuan / Liu, Huihui / Liu, J B / Liu, J Y / Liu, K / Liu, K Y / Liu, Ke / Liu, L / Liu, L Y / Liu, Q / Liu, S B / Liu, T / Liu, X / Liu, Y B / Liu, Z A / Liu, Z Q / Long, Y F / Lou, X C / Lu, H J / Lu, J D / Lu, J G / Lu, X L / Lu, Y / Lu, Y P / Luo, C L / Luo, M X / Luo, P W / Luo, T / Luo, X L / Lusso, S / Lyu, X R / Ma, F C / Ma, H L / Ma, L L / Ma, M M / Ma, Q M / Ma, R Q / Ma, R T / Ma, X N / Ma, X X / Ma, X Y / Ma, Y M / Maas, F E / Maggiora, M / Maldaner, S / Malde, S / Malik, Q A / Mangoni, A / Mao, Y J / Mao, Z P / Marcello, S / Meng, Z X / Messchendorp, J G / Mezzadri, G / Min, T J / Mitchell, R E / Mo, X H / Mo, Y J / Muchnoi, N Yu / Muramatsu, H / Nakhoul, S / Nefedov, Y / Nerling, F / Nikolaev, I B / Ning, Z / Nisar, S / Olsen, S L / Ouyang, Q / Pacetti, S / Pan, Y / Papenbrock, M / Pathak, A / Patteri, P / Pelizaeus, M / Peng, H P / Peters, K / Pettersson, J / Ping, J L / Ping, R G / Pitka, A / Poling, R / Prasad, V / Qi, H / Qi, H R / Qi, M / Qi, T Y / Qian, S / Qian, W-B / Qiao, C F / Qin, L Q / Qin, X P / Qin, X S / Qin, Z H / Qiu, J F / Qu, S Q / Rashid, K H / Ravindran, K / Redmer, C F / Rivetti, A / Rodin, V / Rolo, M / Rong, G / Rosner, Ch / Rump, M / Sarantsev, A / Savrié, M / Schelhaas, Y / Schnier, C / Schoenning, K / Shan, W / Shan, X Y / Shao, M / Shen, C P / Shen, P X / Shen, X Y / Shi, H C / Shi, R S / Shi, X / Shi, X D / Song, J J / Song, Q Q / Song, Y X / Sosio, S / Spataro, S / Sui, F F / Sun, G X / Sun, J F / Sun, L / Sun, S S / Sun, T / Sun, W Y / Sun, Y J / Sun, Y K / Sun, Y Z / Sun, Z T / Tan, Y X / Tang, C J / Tang, G Y / Tang, J / Thoren, V / Tsednee, B / Uman, I / Wang, B / Wang, B L / Wang, C W / Wang, D Y / Wang, H P / Wang, K / Wang, L L / Wang, M / Wang, M Z / Wang, Meng / Wang, W P / Wang, X / Wang, X F / Wang, X L / Wang, Y / Wang, Y D / Wang, Y F / Wang, Y Q / Wang, Z / Wang, Z Y / Wang, Ziyi / Wang, Zongyuan / Weber, T / Wei, D H / Weidenkaff, P / Weidner, 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Physical review letters

2021 Volume 127, Issue 8, Page(s) 82002

Abstract: We report a measurement of the observed cross sections of e^{+}e^{-}→J/ψX based on 3.21 fb^{-1} of data accumulated at energies from 3.645 to 3.891 GeV with the BESIII detector operated at the BEPCII collider. In analysis of the cross sections, we ... ...

Abstract	We report a measurement of the observed cross sections of e^{+}e^{-}→J/ψX based on 3.21 fb^{-1} of data accumulated at energies from 3.645 to 3.891 GeV with the BESIII detector operated at the BEPCII collider. In analysis of the cross sections, we measured the decay branching fractions of B(ψ(3686)→J/ψX)=(64.4±0.6±1.6)% and B(ψ(3770)→J/ψX)=(0.5±0.2±0.1)% for the first time. The energy-dependent line shape of these cross sections cannot be well described by two Breit-Wigner (BW) amplitudes of the expected decays ψ(3686)→J/ψX and ψ(3770)→J/ψX. Instead, it can be better described with one more BW amplitude of the decay R(3760)→J/ψX. Under this assumption, we extracted the R(3760) mass M_{R(3760)}=3766.2±3.8±0.4 MeV/c^{2} , total width Γ_{R(3760)}^{tot}=22.2±5.9±1.4 MeV, and product of leptonic width and decay branching fraction Γ_{R(3760)}^{ee}B[R(3760)→J/ψX]=(79.4±85.5±11.7) eV. The significance of the R(3760) is 5.3σ. The first uncertainties of these measured quantities are from fits to the cross sections and second systematic.
Language	English
Publishing date	2021-09-03
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.127.082002
Database	MEDical Literature Analysis and Retrieval System OnLINE

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