TY - JOUR

T1 - Measurements of the cross sections of e+e− → ΣcΣ̄c and Λc+Σ̄c− near kinematic thresholds

AU - BESIII Collaboration

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - The BESIII Collaboration thanks the staff of BEPCII [59] 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 No. 2023YFA1606000, No. 2023YFA1606704; National Natural Science Foundation of China (NSFC) under Contracts No. 11635010, No. 11735014, No. 11935015, No. 11935016, No. 11935018, No. 12025502, No. 12035009, No. 12035013, No. 12061131003, No. 12192260, No. 12192261, No. 12192262, No. 12192263, No. 12192264, No. 12192265, No. 12221005, No. 12225509, No. 12235017, No. 12361141819; 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 under Contract No. YSBR-101; 100 Talents Program of CAS; The Institute of Nuclear and Particle Physics (INPAC) and Shanghai Key Laboratory for Particle Physics and Cosmology; German Research Foundation DFG under Contract No. FOR5327; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts No. 2021.0174, No. 2021.0299; 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. B50G670107; Polish National Science Centre under Contract No. 2019/35/O/ST2/02907; Swedish Research Council under Contract No. 2019.04595; The Swedish Foundation for International Cooperation in Research and Higher Education under Contract No. CH2018-7756; U.S. Department of Energy under Contract No. DE-FG02-05ER41374.

PY - 2025/11/25

Y1 - 2025/11/25

N2 - Based on e+e− annihilation data collected with the BESIII detector at the BEPCII collider, searches for the (Formula presented.), and (Formula presented.) processes, as well as for the process (Formula presented.), are ffiffi conducted for the first time at √s = 4.750, 4.781, 4.843, 4.918, and 4.951 GeV. As no signals are observed for all the above channels, the upper limits on their Born cross sections at the 90% confidence level are reported. The obtained upper limits of cross sections for e+e− → ΣcΣ̄c are more than 2 orders of magnitude smaller than those for e+e− → Λ+c Λ̄−c near the threshold. In contrast, such suppression is absent in hyperon pair production (e+e− → ΛΛ̄ and ΣΣ̄), suggesting distinct underlying dynamics in charmed baryon production.

AB - Based on e+e− annihilation data collected with the BESIII detector at the BEPCII collider, searches for the (Formula presented.), and (Formula presented.) processes, as well as for the process (Formula presented.), are ffiffi conducted for the first time at √s = 4.750, 4.781, 4.843, 4.918, and 4.951 GeV. As no signals are observed for all the above channels, the upper limits on their Born cross sections at the 90% confidence level are reported. The obtained upper limits of cross sections for e+e− → ΣcΣ̄c are more than 2 orders of magnitude smaller than those for e+e− → Λ+c Λ̄−c near the threshold. In contrast, such suppression is absent in hyperon pair production (e+e− → ΛΛ̄ and ΣΣ̄), suggesting distinct underlying dynamics in charmed baryon production.

KW - Form factors

KW - Particle production

KW - Quark model

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001641109600001

UR - https://www.mendeley.com/catalogue/018857c4-6cb5-3c38-8877-1c81657c3d5a/

U2 - 10.1103/bjr6-rrdc

DO - 10.1103/bjr6-rrdc

M3 - Article

VL - 112

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 9

M1 - 092017

ER -