In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2022, No. 9 ( 2022-09-14)
Abstract:
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 + π 0 π 0 and D + → K + π 0 η . The branching fractions of D + → K + π 0 π 0 and D + → K + π 0 η are measured to be (2 . 1 ± 0 . 4 stat ± 0 . 1 syst ) × 10 − 4 and (2 . 1 ± 0 . 5 stat ± 0 . 1 syst ) × 10 − 4 with statistical significances of 8.8 σ and 5.5 σ , respectively. In addition, we search for the subprocesses D + → K * (892) + π 0 and D + → K * (892) + η with K * (892) + → K + π 0 . The branching fraction of D + → K * (892) + η is determined to be ( $$ {4.4}_{-{1.5}_{\mathrm{stat}}}^{+1.8} $$ 4.4 − 1.5 stat + 1.8 ± 0 . 2 syst ) × 10 − 4 , with a statistical significance of 3.2 σ . No significant signal for D + → K * (892) + π 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 × 10 − 4 .
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP09(2022)107
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2022
detail.hit.zdb_id:
2027350-2
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