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Partial wave analysis of 𝑒+β’π‘’βˆ’ β†’ πœ‹+β’πœ‹βˆ’β’π½/πœ“ and cross section measurement of 𝑒+β’π‘’βˆ’ β†’ πœ‹ Β± ⁒𝑍𝑐⁒(3900)βˆ“ from 4.1271 to 4.3583 GeV

Journal Article · · Physical Review. D.
DOI:https://doi.org/10.1103/f94z-snbh· OSTI ID:3013392
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Based on 12.0 fbβˆ’1 of 𝑒+β’π‘’βˆ’ collision data samples collected by the BESIII detector at center-of-mass energies from 4.1271 to 4.3583 GeV, a partial wave analysis is performed for the process 𝑒+β’π‘’βˆ’ β†’ πœ‹+β’πœ‹βˆ’β’π½/πœ“. The cross sections for the subprocesses 𝑒+β’π‘’βˆ’ β†’ πœ‹+⁒𝑍𝑐⁒(3900)βˆ’ + c.c. β†’ πœ‹+β’πœ‹βˆ’β’π½/πœ“, 𝑓0⁑(980)⁒(β†’ πœ‹+β’πœ‹βˆ’)⁒𝐽/πœ“, and (πœ‹+β’πœ‹βˆ’)Sβˆ’wave⁒𝐽/πœ“ are measured for the first time. The mass and width of the 𝑍𝑐⁒(3900)Β± are determined to be 3884.6 Β± 0.7 Β± 3.3 MeV/𝑐2 and 37.2 Β± 1.3 Β± 6.6 MeV, respectively. The first errors are statistical and the second systematic. The final state (πœ‹+β’πœ‹βˆ’)Sβˆ’wave⁒𝐽/πœ“ dominates the process 𝑒+β’π‘’βˆ’ β†’ πœ‹+β’πœ‹βˆ’β’π½/πœ“. By analyzing the cross sections of πœ‹Β±β’π‘π‘β’(3900)βˆ“ and 𝑓0⁑(980)⁒𝐽/πœ“, π‘Œβ‘(4220) has been observed. Its mass and width are determined to be 4225.7 Β± 4.1 Β± 3.4 MeV/𝑐2 and 57.5 Β± 9.4 Β± 12.1 MeV, respectively.
Research Organization:
Indiana Univ., Bloomington, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-05ER41374
OSTI ID:
3013392
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 9 Vol. 112; ISSN 2470-0010; ISSN 2470-0029
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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