| Title: |
Precise measurement of the χ c0 resonance parameters and branching fractions of χ c0,c2 → π + π − /K + K − |
| Authors: |
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Afedulidis, O.; Ai, X. C.; Aliberti, R.; Amoroso, A.; Kalantar-Nayestanaki, Nasser; Kavatsyuk, Myroslav; Messchendorp, Johan |
| Source: |
BESIII Collaboration, Ablikim, M, Achasov, M N, Adlarson, P, Afedulidis, O, Ai, X C, Aliberti, R, Amoroso, A, Kalantar-Nayestanaki, N, Kavatsyuk, M & Messchendorp, J 2025, 'Precise measurement of the χ c0 resonance parameters and branching fractions of χ c0,c2 → π + π − /K + K −', Chinese Physics C, vol. 49, no. 9, 091001. https://doi.org/10.1088/1674-1137/ade95f |
| Publication Year: |
2025 |
| Collection: |
University of Groningen research database |
| Description: |
By analyzing a ψ(3686) data sample containing (107.7±0.6)×106 events taken with the BESIII detect- or at the BEPCII storage ring in 2009, the χc0 resonance parameters are precisely measured using χc0,c2 → π+π−/K+K− events. The mass of χc0 is determined to be M(χc0) = (3415.63±0.07±0.07±0.07) MeV/c2, and its full width is Γ(χc0) = (12.52±0.12±0.13) MeV, where the first uncertainty is statistical, the second systematic, and the third for mass comes from χc2 mass uncertainty. These measurements improve the precision of χc0 mass by a factor of four and width by one order of magnitude over the previous individual measurements, and significantly boost our knowledge about the charmonium spectrum. Together with additional (345.4±2.6)×106 ψ(3686) data events taken in 2012, the decay branching fractions of χc0,c2 → π+π−/K+K− are measured as well, with precision improved by a factor of three compared to previous measurements. These χc0 decay branching fractions provide important inputs for the study of glueballs. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| ISSN: |
1674-1137 |
| Relation: |
info:eu-repo/semantics/altIdentifier/hdl/https://hdl.handle.net/11370/fe9eb3a0-8848-4cf1-8fae-bffbeb95ac50; info:eu-repo/semantics/altIdentifier/pissn/1674-1137 |
| DOI: |
10.1088/1674-1137/ade95f |
| Availability: |
https://hdl.handle.net/11370/fe9eb3a0-8848-4cf1-8fae-bffbeb95ac50; https://research.rug.nl/en/publications/fe9eb3a0-8848-4cf1-8fae-bffbeb95ac50; https://doi.org/10.1088/1674-1137/ade95f; https://pure.rug.nl/ws/files/1422014643/Ablikim_2025_Chinese_Phys._C_49_091001.pdf |
| Rights: |
info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.3F3E388C |
| Database: |
BASE |