期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 10, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP10(2019)220
关键词
e plus -e- Experiments; Quarkonium; Spectroscopy
资金
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan
- Japan Society for the Promotion of Science (JSPS)
- Tau-Lepton Physics Research Center of Nagoya University
- Australian Research Council [DP180102629, DP170102389, DP170102204, DP150103061, FT130100303]
- Austrian Science Fund (FWF)
- National Natural Science Foundation of China [11435013, 11475187, 11521505, 11575017, 11675166, 11705209]
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) [QYZDJ-SSW-SLH011]
- CAS Center for Excellence in Particle Physics (CCEPP)
- Shanghai Pujiang Program [18PJ1401000]
- Ministry of Education, Youth and Sports of the Czech Republic [LTT17020]
- Carl Zeiss Foundation
- Deutsche Forschungsgemeinschaft
- Excellence Cluster Universe
- VolkswagenStiftung
- Department of Science and Technology of India
- Istituto Nazionale di Fisica Nucleare of Italy
- National Research Foundation (NRF) of Korea [2015H1A2A1033649, 2016R1D1A1B01010135, 2016K1A3A7A09005 603, 2016R1D1A1B02012900, 2018R1A2B3003 643, 2018R1A6A1A06024970, 2018R1D1 A1B07047294]
- Radiation Science Research Institute
- Foreign Large-size Research Facility Application Supporting project
- Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information and KREONET/GLORIAD
- Polish Ministry of Science and Higher Education
- National Science Center
- Russian Science Foundation (RSF) [18-12-00226]
- Slovenian Research Agency
- Ikerbasque, Basque Foundation for Science, Spain
- Swiss National Science Foundation
- Ministry of Education of Taiwan
- Ministry of Science and Technology of Taiwan
- United States Department of Energy
- National Science Foundation
- Australian Research Council [FT130100303] Funding Source: Australian Research Council
- Russian Science Foundation [18-12-00226] Funding Source: Russian Science Foundation
We report a new measurement of the e(+)e(-)-> Upsilon(nS)pi(+)pi(-) (n = 1, 2, 3) cross sections at energies from 10.52 to 11.02 GeV using data collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a new structure in the energy dependence of the cross sections; if described by a Breit-Wigner function its mass and width are found to be M= open=(10752.7 +/- 5.9-1.1+0.7 MeV/c2 and Gamma) open (>35.5-11.3 0.5em -3.3+17.6+3.9 MeV, where the first error is statistical and the second is systematic. The global significance of the new structure including systematic uncertainty is 5.2 standard deviations. We also find evidence for the e(+)e(-)-> Upsilon (1S)pi(+)pi(-) process at the energy 10.52 GeV, which is below the B (B) over bar threshold.
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