Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 9, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP09(2022)107
Keywords
Branching fraction; Charm Physics; e(+)-e(-); Experiments; Flavour Physics
Categories
Funding
- National Key R&D Program of China [2020YFA0406400, 2020YFA0406300]
- National Natural Science Foundation of China (NSFC) [11775230, 11625523, 11635010, 11735014, 11822506, 11835012, 11935015, 11935016, 11935018, 11961141012, 12022510, 12025502, 12035009, 12035013, 12061131003, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265]
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- NSFC [U1732263, U1832207, U1932102]
- CAS [U1732263, U1832207, U1932102]
- CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-SLH040]
- CAS Center for Excellence in Particle Physics (CCEPP)
- 100 Talents Program of CAS
- Shanghai Key Laboratory for Particle Physics and Cosmology
- ERC [758462]
- European Union [894790]
- German Research Foundation DFG [443159800, CRC 1044, FOR 2359, GRK 214]
- Istituto Nazionale di Fisica Nucleare, Italy
- Ministry of Development of Turkey [DPT2006K-120470]
- National Science and Technology fund
- Olle Engkvist Foundation [200-0605]
- STFC (United Kingdom)
- Knut and Alice Wallenberg Foundation (Sweden) [2016.0157]
- Royal Society, U.K. [DH140054, DH160214]
- Swedish Research Council
- U.S. Department of Energy [DE-FG02-05ER41374, DE-SC-0012069]
- INPAC
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By analyzing e(+)e(-) annihilation data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, the first observations of the doubly Cabibbo-suppressed decays D+ -> K+ pi(0)pi(0) and D+ -> K+ pi(0)eta are reported. The branching fractions and statistical significances are measured, and the search for other subprocesses is also conducted.
By analyzing e(+)e(-) annihilation data corresponding to an integrated luminosity of 2.93 fb(-1) collected at the center-of-mass energy of 3.773 GeV with the BESIII detector, we report the first observations of the doubly Cabibbo-suppressed decays D+ -> K+ pi(0)pi(0) and D+ -> K+ pi(0)eta. The branching fractions of D+ -> K+ pi(0)pi(0) and D+ -> K+ pi(0)eta are measured to be (2.1 +/- 0.4(stat) +/- 0.1(syst)) x 10(-4) and (2.1 +/- 0.5(stat) +/- 0.1(syst)) x 10(-4) with statistical significances of 8.8 sigma and 5.5 sigma, respectively. In addition, we search for the subprocesses D+ -> K*(892)(+)pi(0) and D+-> K*(892)(+)eta with K*(892)(+) -> K+pi(0). The branching fraction of D+ -> K* (892)(+)pi(0) is determined to be (4.4(-1.5stat)(+1.8) +/- 0.2(syst)) x 10(-4), with a statistical significance of 3.2 sigma. No significant signal for D+ -> K* (892)(+)pi(0) is found and we set an upper limit on the branching fraction of this decay at the 90% confidence level to be 5.4 x 10(-4).
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