Abstract
Based on 4.5 fb−1 e+e− collision data collected with BESIII detector at seven energy points between 4.600 and 4.699 GeV, the branching fractions for \( {\Lambda}_c^{+}\to p\eta \) and \( {\Lambda}_c^{+}\to p\omega \) were measured by means of single-tag method. The branching fractions of \( {\Lambda}_c^{+}\to p\eta \) and \( {\Lambda}_c^{+}\to p\omega \) are determined to be (1.57 ± 0.11stat ± 0.04syst) × 10−3 and (1.11 ± 0.20stat ± 0.07syst) × 10−3, with a statistical significance of greater than 10σ and 5.7σ, respectively. These results are consistent with the previous measurements by BESIII, LHCb and Belle, and the result of \( {\Lambda}_c^{+}\to p\eta \) is the most precise to date.
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Acknowledgments
The BESIII collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of China under Contracts Nos. 2020YFA0406400, 2020YFA0406300; National Natural Science Foundation of China (NSFC) under Contracts Nos. 11635010, 11735014, 11835012, 11935015, 11935016, 11935018, 11961141012, 12022510, 12025502, 12035009, 12035013, 12061131003, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265, 12221005, 12005311; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; the CAS Center for Excellence in Particle Physics (CCEPP); Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contract No. U1832207; CAS Key Research Program of Frontier Sciences under Contracts Nos. QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040; 100 Talents Program of CAS; Fundamental Research Funds for the Central Universities, Lanzhou University, University of Chinese Academy of Sciences; The Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union’s Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreement under Contract No. 894790; German Research Foundation DFG under Contracts Nos. 443159800, 455635585, Collaborative Research Center CRC 1044, FOR5327, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Research Foundation of Korea under Contract No. NRF-2022R1A2C1092335; National Science and Technology fund of Mongolia; National Science Research and Innovation Fund (NSRF) via the Program Management Unit for Human Resources & Institutional Development, Research and Innovation of Thailand under Contract No. B16F640076; Polish National Science Centre under Contract No. 2019/35/O/ST2/02907; The Royal Society, U.K. under Contract No. DH160214; The Swedish Research Council; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.
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The BESIII collaboration., Ablikim, M., Achasov, M.N. et al. Measurement of the branching fractions of the singly Cabibbo-suppressed decays \( {\Lambda}_{\textrm{c}}^{+}\to \textrm{p}\eta \) and \( {\Lambda}_{\textrm{c}}^{+}\to \textrm{p}\omega \). J. High Energ. Phys. 2023, 137 (2023). https://doi.org/10.1007/JHEP11(2023)137
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DOI: https://doi.org/10.1007/JHEP11(2023)137