TY - JOUR

T1 - Measurements of K0S-K0L asymmetries in the decays Λ+c → pK0L,S, pK0L,Sπ+π− and pK0L,Sπ0

AU - BESIII Collaboration

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - 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, 2023YFA1606000; National Natural Science Foundation of China (NSFC) under Contracts Nos. 11635010, 11735014, 11935015, 11935016, 11935018, 12025502, 12035009, 12035013, 12061131003, 12122507, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265, 12221005, 12225509, 12235017, 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; 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 Contracts Nos. 455635585, 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 Swedish Research Council; U. S. Department of Energy under Contract No. DE-FG02-05ER41374.

PY - 2024/9

Y1 - 2024/9

N2 - Using e+e− annihilation data sets corresponding to an integrated luminosity of 4.5 fb−1, collected with the BESIII detector at center-of-mass energies between4.600 and 4.699 GeV, we report the frst measurements of the absolute branching fractionsB(Λ+c → pK0L) = (1.67 ± 0.06 ± 0.04)%, B(Λ+c → pK0Lπ+π−) = (1.69 ± 0.10 ± 0.05)%, and B(Λ+c → pK0Lπ0) = (2.02 ± 0.13 ± 0.05)%, where the frst uncertainties are statistical and the second systematic. Combining with the known branching fractions of Λ+c → pK0S, Λ+c → pK0Sπ+π−, and Λ+c → pK0Sπ0, we present the frst measurements of the K0S-K0Lasymmetries R(Λ+c, K0S,LX) = B(Λ+c →K0SX)−B(Λ+c →K0LX)B(Λ+c →K0SX)+B(Λ+c →K0LX) in charmed baryon decays: R(Λ+c, pK0S,L) = −0.025 ± 0.031, R(Λ+c pK0S,Lπ+π−) = −0.027 ± 0.048, andR(Λ+c, pK0S,Lπ0) = −0.015 ± 0.046. No signifcant asymmetries with statistical signifcance are observed.

AB - Using e+e− annihilation data sets corresponding to an integrated luminosity of 4.5 fb−1, collected with the BESIII detector at center-of-mass energies between4.600 and 4.699 GeV, we report the frst measurements of the absolute branching fractionsB(Λ+c → pK0L) = (1.67 ± 0.06 ± 0.04)%, B(Λ+c → pK0Lπ+π−) = (1.69 ± 0.10 ± 0.05)%, and B(Λ+c → pK0Lπ0) = (2.02 ± 0.13 ± 0.05)%, where the frst uncertainties are statistical and the second systematic. Combining with the known branching fractions of Λ+c → pK0S, Λ+c → pK0Sπ+π−, and Λ+c → pK0Sπ0, we present the frst measurements of the K0S-K0Lasymmetries R(Λ+c, K0S,LX) = B(Λ+c →K0SX)−B(Λ+c →K0LX)B(Λ+c →K0SX)+B(Λ+c →K0LX) in charmed baryon decays: R(Λ+c, pK0S,L) = −0.025 ± 0.031, R(Λ+c pK0S,Lπ+π−) = −0.027 ± 0.048, andR(Λ+c, pK0S,Lπ0) = −0.015 ± 0.046. No signifcant asymmetries with statistical signifcance are observed.

KW - Charm Physics

KW - e+-e− Experiments

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85203296270&origin=inward&txGid=bbe7335d55bbd1fa7151e69a89150c0c

U2 - 10.1007/JHEP09(2024)007

DO - 10.1007/JHEP09(2024)007

M3 - Article

VL - 2024

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 7

M1 - 7

ER -