TY - JOUR

T1 - Measurement of the branching fractions of doubly Cabibbo-suppressed D decays

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Николаев, Иван Борисович

AU - Мучной, Николай Юрьевич

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. 2023YFA1606000; National Natural Science Foundation of China (NSFC) under Contracts Nos. 12035009, 11875170, 12105076, 11635010, 11735014, 11935015, 11935016, 11935018, 12025502, 12035013, 12061131003, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265, 12221005, 12225509, 12235017, 12361141819; the Chinese sAcademy 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. FOR5327, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Knut and Alice Wallenberg Foundation under Contracts Nos. 2021.0174, 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 Contracts Nos. B16F640076, 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 - 2025/6/24

Y1 - 2025/6/24

N2 - By analyzing e+e− collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3 fb−1, we measure the branching fractions of the doubly Cabibbo-suppressed (DCS) decays D0 → K+π−, D0 → K+π−π−π+, D0 → K+π−π0, D0 → K+π−π0π0, D+ → K+π+π−, and D+ → K+K+K−. We also perform the first searches for D0 → K+π−η, D0 → K+π−π0η, D+ → K+π+π−η, D+ → K+ (π+π−η)non−η′, and D+ → K+ηη and report the first observations and evidence for some of these final states. Combining the measurements with the world averages of the corresponding Cabibbo-favored (CF) decays, the ratios of the DCS/CF branching fractions are obtained. For the D+ → K+ (π+π−η)non−η′ decay, the ratio is significantly larger than the corresponding ratios of the other DCS decays.

AB - By analyzing e+e− collision data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3 fb−1, we measure the branching fractions of the doubly Cabibbo-suppressed (DCS) decays D0 → K+π−, D0 → K+π−π−π+, D0 → K+π−π0, D0 → K+π−π0π0, D+ → K+π+π−, and D+ → K+K+K−. We also perform the first searches for D0 → K+π−η, D0 → K+π−π0η, D+ → K+π+π−η, D+ → K+ (π+π−η)non−η′, and D+ → K+ηη and report the first observations and evidence for some of these final states. Combining the measurements with the world averages of the corresponding Cabibbo-favored (CF) decays, the ratios of the DCS/CF branching fractions are obtained. For the D+ → K+ (π+π−η)non−η′ decay, the ratio is significantly larger than the corresponding ratios of the other DCS decays.

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105012486153&origin=inward

U2 - 10.1007/JHEP06(2025)220

DO - 10.1007/JHEP06(2025)220

M3 - Article

VL - 2025

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 6

M1 - 220

ER -