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Title: Measurements of the Υ ( 10860 ) and Υ ( 11020 ) resonances via σ ( e + e - Υ ( n S ) π + π - )

Journal Article · · Physical Review D
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In this work, we report new measurements of the total cross sections for e + e - Υ ( n S ) π + π - ( n = 1 , 2, 3) and e + e - b b ¯ from a high-luminosity fine scan of the region s = 10.63 11.05 GeV with the Belle detector. We observe that the Υ ( n S ) π + π - spectra have little or no nonresonant component and extract from them the masses and widths of Υ ( 10860 ) and Υ ( 11020 ) and their relative phase. We find M 10860 = ( 10891.1 ± 3. 2 - 1.7 + 0.6 ) MeV / c 2 and Γ 10860 = ( 53. 7 - 5.6 - 5.4 + 7.1 + 1.3 ) MeV and report first measurements M 11020 = ( 10987. 5 - 2.5 - 2.1 + 6.4 + 9.0 ) MeV / c 2 , Γ 11020 = ( 6 1 - 19 - 20 + 9 + 2 ) MeV , and Φ 11020 - Φ 10860 = ( - 1.0 ± 0.4 - 0.1 + 1.4 ) rad .

Research Organization:
Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Belle Collaboration
Grant/Contract Number:
SC0009973; AC05-76RL01830
OSTI ID:
1594405
Alternate ID(s):
OSTI ID: 1235612
Report Number(s):
PNNL-SA-117355; PRVDAQ; TRN: US2101530
Journal Information:
Physical Review D, Vol. 93, Issue 1; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

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