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Search for direct production of the f1(1285) resonance in e+e− collisions.
- Source :
-
Physics Letters B . Jan2020, Vol. 800, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- A search for direct production of the f 1 (1285) resonance in e + e − annihilation is performed with the SND detector at the VEPP-2000 e + e − collider. The analysis is based on data with an integrated luminosity of 15.1 pb−1 accumulated in the center-of-mass energy range 1.2–1.4 GeV. Two e + e − → f 1 (1285) candidate events are found at the peak of the resonance and zero events beyond the resonance. The significance of the e + e − → f 1 (1285) signal is 2.5 σ. The cross section at the maximum of the resonance is found to be σ (e + e − → f 1) = 45 − 24 + 33 pb. The corresponding branching fraction B (f 1 (1285) → e + e −) = (5.1 − 2.7 + 3.7) × 10 − 9. We consider this result as a first indication of the process e + e − → f 1 (1285). The measured branching fraction is consistent with the theoretical prediction. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LUMINOSITY
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Volume :
- 800
- Database :
- Academic Search Index
- Journal :
- Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- 141109685
- Full Text :
- https://doi.org/10.1016/j.physletb.2019.135074