Observation of the 
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-annihilation decay 
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Ablikim, M.; Ачасов, М. Н.; Ahmed, S.; Albrecht, M.; Alekseev, M.; Amoroso, A.; An, F. F.; An, Q.; Bai, Y.; Bakina, O.; Ferroli, R. Baldini; Ban, Y.; Begzsuren, K.; Bennett, D. W.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Boger, E.; Boyko, I. R.; Briere, R. A.; Cai, H.; Cai, X.; Çakır, O.; Calcaterra, A.; Cao, G. F.; Çetin, S. A.; Chai, J.; Chang, J. F.; Chang, W. L.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, P. L.; Chen, S. J.; Chen, Y. B.; Cheng, W. S.; Cibinetto, G.; Cossio, F.; Dai, H. L.; Dai, J. P.; Dbeyssi, A.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; Mori, F. De; Ding, Y.; Dong, C.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Dou, Z. L.; Du, S. X.; Duan, Pengfei; Fan, J.; Fang, J.; Fang, S. S.; Fang, Y.; Farinelli, R.; Fava, L.; Fegan, S.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Fritsch, M.; Fu, C. D.; Fu, Yang; Gao, Q.; Gao, X. 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doi:10.1103/physrevd.99.091101

Cited by 11 publications

(5 citation statements)

References 18 publications

(38 reference statements)

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“…The systematic uncertainties from the tracking and PID of K ± and π ± are estimated by using the control sample of e + e − → K + K − π + π − (π 0 ) [31].…”

Section: Systematic Uncertaintiesmentioning

confidence: 99%

Observations of the Cabibbo-Suppressed decays , and the Cabibbo-Favored decay *

et al. 2023

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Using electron-positron annihilation data samples corresponding to an integrated luminosity of 4.5\,\unit{fb}$^{-1}$, collected by the BESIII detector in the energy region between $4600~\mev$ and $4699~\mev$, we report the first observations of the Cabibbo-suppressed decays $\Lambda_c^+\to n\pi^+\pi^0$, $\Lambda_c^+\to n\pi^+\pi^-\pi^+$, and the Cabibbo-favored decay $\Lambda_c^+\to nK^-\pi^+\pi^+$ with statistical significances of $7.9\sigma$, $7.8\sigma$, and $>10\sigma$, respectively. The branching fractions of these decays are measured to be $\mathcal{B}(\Lambda_{c}^{+}\rightarrow n\pi^{+}\pi^{0})=(0.64\pm0.09\pm0.02)\%$, $\mathcal{B}(\Lambda_{c}^{+}\rightarrow n\pi^{+}\pi^{-}\pi^{+})=(0.45\pm0.07\pm0.03)\%$, and $\mathcal{B}(\Lambda_{c}^{+}\rightarrow nK^{-}\pi^{+}\pi^{+})=(1.90\pm0.08\pm0.09)\%$, where the first uncertainties are statistical and the second are systematic. We find that the branching fraction of the decay $\Lambda_{c}^{+}\rightarrow n\pi^{+}\pi^{0}$ is about one order of magnitude higher than that of $\Lambda_{c}^{+}\rightarrow n\pi^{+}$. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

show abstract

“…The systematic uncertainties from the tracking and PID of K ± and π ± are estimated by using the control sample of e + e − → K + K − π + π − (π 0 ) [31].…”

Section: Systematic Uncertaintiesmentioning

confidence: 99%

Observations of the Cabibbo-Suppressed decays , and the Cabibbo-Favored decay *

et al. 2023

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“…• π 0 meson reconstruction efficiency We assign 2.0% as the systematic uncertainty in the π 0 reconstruction according to the studies in Ref. [49].…”

Section: A Event Selectionmentioning

confidence: 99%

Amplitude analysis and branching fraction measurement of $D_s^+ \to K^-K^+π^+π^0$

2021

Preprint

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We present the first amplitude analysis of the decay D + s → K − K + π + π 0 using data samples of 6.32 fb −1 recorded with the BESIII detector between 4.178 and 4.226 GeV. More than 3000 events selected with a purity of 97.5% are used to perform the amplitude analysis, and nine components are found necessary to describe the data. Relative fractions and phases of the intermediate decays are determined. With the detection efficiency determined by the results of the amplitude analysis, we measure the branching fraction of D + s → K − K + π + π 0 decay to be (5.42 ± 0.10stat. ± 0.17syst.)%.

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“…The selection criteria for charged tracks, photons, K 0 S , and π 0 are the same as those reported in Ref. [13]. The η ð0Þ candidate is required to have an invariant mass of the γγðπ þ π − ηÞ combination in the interval ½0.490; 0.580ð½0.938; 0.978Þ GeV=c 2 .…”

mentioning

confidence: 99%

“…The possible bias due to the measurement method is estimated to be 0.2% by comparing the measured BF in the GMC sample, using the same method as in data analysis, to the value assumed in the generation. The uncertainties from particle identification and tracking efficiencies are assigned to be 0.5% and 1.0% [13], respectively. The relative uncertainty in the π 0 reconstruction efficiency is 2.0% [13], and the uncertainty in η reconstruction is assumed to be comparable to that on π 0 reconstruction and correlated with it.…”

mentioning

confidence: 99%

“…The uncertainties from particle identification and tracking efficiencies are assigned to be 0.5% and 1.0% [13], respectively. The relative uncertainty in the π 0 reconstruction efficiency is 2.0% [13], and the uncertainty in η reconstruction is assumed to be comparable to that on π 0 reconstruction and correlated with it. The uncertainty from the Dalitz model of 0.6% is estimated as the change of efficiency when the model parameters are varied by their systematic uncertainties (this term is not considered when calculating the BFs of the intermediate processes).…”

mentioning

confidence: 99%

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