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  1. Book ; Online: Search for $\eta_c (2S)\to\pi^{+}\pi^{-}\eta_{c}$ and $\eta_c (2S)\to\pi^{+}\pi^{-}K^0_S K^{\pm}\pi^{\mp}$ decays

    The BESIII Collaboration

    2024  

    Abstract: Based on $(27.12\pm 0.14)\times 10^{8}$ $\psi(2S)$ events collected with the BESIII detector, we search for the decay $\eta_c (2S) \rightarrow \pi^{+} \pi^{-} \eta_c$ with $\eta_c\rightarrow K_S^0 K^{\pm}\pi^{\mp}$ and $\eta_c\rightarrow K^{+}K^{-}\pi^{0} ...

    Abstract Based on $(27.12\pm 0.14)\times 10^{8}$ $\psi(2S)$ events collected with the BESIII detector, we search for the decay $\eta_c (2S) \rightarrow \pi^{+} \pi^{-} \eta_c$ with $\eta_c\rightarrow K_S^0 K^{\pm}\pi^{\mp}$ and $\eta_c\rightarrow K^{+}K^{-}\pi^{0}$. No significant signal is observed, and the upper limit on the product branching fraction $\mathcal{B}(\psi(2S)\rightarrow \gamma \eta_{c}(2S))\times\mathcal{B}$($\eta_c (2S) \rightarrow \pi^{+} \pi^{-} \eta_c$) is determined to be $2.21\times10^{-5}$ at the 90\% confidence level. In addition, the analysis of the process $\psi(2S)\to\gamma \eta_{c}(2S), \eta_{c}(2S)\rightarrow \pi^{+}\pi^{-}K^{0}_{S}K^{\pm}\pi^{\mp}$ gives a clear $\eta_c(2S)$ signal with a statistical significance of $10\sigma$ for the first time, %The product branching fraction $\mathcal{B}(\psi(2S)\rightarrow \gamma \eta_{c}(2S))\times\mathcal{B}(\eta_{c}(2S)\rightarrow \pi^{+}\pi^{-}K^{0}_{S}K\pi) $ is measured to be $(9.31 \pm 0.72 \pm 2.77)\times 10^{-6}$, and and the branching fraction $\mathcal{B}(\eta_{c}(2S)\rightarrow \pi^{+}\pi^{-}K^{0}_{S}K^{\pm}\pi^{\mp})$ is determined to be ($1.33 \pm 0.11 \pm 0.4 \pm 0.95 $)$\times 10^{-2}$, where the first uncertainty is statistical, the second is systematic, and the third uncertainty is due to the quoted $\mathcal{B}(\psi(2S)\rightarrow \gamma \eta_{c}(2S))$.

    Comment: 14 pages, 5 figures. Submitted to Physical Review D
    Keywords High Energy Physics - Experiment
    Subject code 612
    Publishing date 2024-01-10
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: Observation of the Doubly Cabibbo-Suppressed Decay $D^+\to K^+\pi^+\pi^-\pi^0$ and Evidence for $D^+\to K^+\omega$

    BESIII Collaboration

    2020  

    Abstract: Using $2.93 \rm fb^{-1}$ of $e^+e^-$ collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, the first observation of the doubly Cabibbo-suppressed decay $D^+\to K^+\pi^+\pi^-\pi^0$ is reported. After removing decays ... ...

    Abstract Using $2.93 \rm fb^{-1}$ of $e^+e^-$ collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, the first observation of the doubly Cabibbo-suppressed decay $D^+\to K^+\pi^+\pi^-\pi^0$ is reported. After removing decays that contain narrow intermediate resonances, including $D^+\to K^+\eta$, $D^+\to K^+\omega$, and $D^+\to K^+\phi$, the branching fraction of the decay $D^+\to K^+\pi^+\pi^-\pi^0$ is measured to be $(1.13 \pm 0.08_{\rm stat} \pm 0.03_{\rm syst})\times 10^{-3}$. The ratio of branching fractions of $D^+\to K^+\pi^+\pi^-\pi^0$ over $D^+\to K^-\pi^+\pi^+\pi^0$ is found to be $(1.81\pm0.15)$\%, which corresponds to $(6.28\pm0.52)\tan^4\theta_C$, where $\theta_C$ is the Cabibbo mixing angle. This ratio is significantly larger than the corresponding ratios for other doubly Cabibbo-suppressed decays. The asymmetry of the branching fractions of charge-conjugated decays $D^\pm\to K^\pm\pi^\pm\pi^\mp\pi^0$ is also determined, and no evidence of $CP$ violation is found. In addition, the first evidence of the $D^+\to K^+\omega$ decay, with a statistical significance of 3.3$\sigma$, is presented and its decay branching fraction is determined to be $({5.7^{+2.5}_{-2.1}}_{\rm stat}\pm0.2_{\rm syst})\times10^{-5}$.
    Keywords High Energy Physics - Experiment
    Subject code 612
    Publishing date 2020-07-15
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Book ; Online: First Observation of $D^+\to \eta\mu^+\nu_\mu$ and Measurement of its Decay Dynamics

    BESIII Collaboration

    2020  

    Abstract: By analyzing a data sample corresponding to an integrated luminosity of $2.93~\mathrm{fb}^{-1}$ collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we measure for the first time the absolute branching fraction of the $D^+\to \eta \ ...

    Abstract By analyzing a data sample corresponding to an integrated luminosity of $2.93~\mathrm{fb}^{-1}$ collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we measure for the first time the absolute branching fraction of the $D^+\to \eta \mu^+\nu_\mu$ decay to be ${\mathcal B}_{D^+\to \eta \mu^+\nu_\mu}=(10.4\pm1.0_{\rm stat}\pm0.5_{\rm syst})\times 10^{-4}$. Using the world averaged value of ${\mathcal B}_{D^+\to \eta e^+\nu_e}$, the ratio of the two branching fractions is determined to be ${\mathcal B}_{D^+\to \eta \mu^+\nu_\mu}/{\mathcal B}_{D^+\to \eta e^+\nu_e}=0.91\pm0.13$, which agrees with the theoretical expectation of lepton flavor universality within uncertainty. Here, the uncertainty is the sum in quadrature of the statistical and systematic uncertainties. By studying the differential decay rates in five four-momentum transfer intervals, we obtain the product of the hadronic form factor $f^{\eta}_{+}(0)$ and the $c\to d$ Cabibbo-Kobayashi-Maskawa matrix element $|V_{cd}|$ to be $f_{+}^\eta (0)|V_{cd}|=0.087\pm0.008_{\rm stat}\pm0.002_{\rm syst}$. Taking the input of $|V_{cd}|$ from the global fit in the standard model, we determine $f_{+}^\eta (0)=0.39\pm0.04_{\rm stat}\pm0.01_{\rm syst}$. On the other hand, using the value of $f_+^{\eta}(0)$ calculated in theory, we find $|V_{cd}|=0.242\pm0.022_{\rm stat}\pm0.006_{\rm syst}\pm0.033_{\rm theory}$.

    Comment: 10 pages, 3 figures
    Keywords High Energy Physics - Experiment
    Subject code 551
    Publishing date 2020-03-26
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book ; Online: Measurements of Absolute Branching Fractions of Fourteen Exclusive Hadronic $D$ Decays to $\eta$

    BESIII Collaboration

    2020  

    Abstract: Using $2.93\,\rm fb^{-1}$ of $e^+e^-$ collision data taken at a center-of-mass energy of 3.773\,GeV with the BESIII detector, we report the first measurements of the absolute branching fractions of fourteen hadronic $D^{0(+)}$ decays to exclusive final ... ...

    Abstract Using $2.93\,\rm fb^{-1}$ of $e^+e^-$ collision data taken at a center-of-mass energy of 3.773\,GeV with the BESIII detector, we report the first measurements of the absolute branching fractions of fourteen hadronic $D^{0(+)}$ decays to exclusive final states with an $\eta$, e.g., $D^0\to K^-\pi^+\eta$, $K^0_S\pi^0\eta$, $K^+K^-\eta$, $K^0_SK^0_S\eta$, $K^-\pi^+\pi^0\eta$, $K^0_S\pi^+\pi^-\eta$, $K^0_S\pi^0\pi^0\eta$, and $\pi^+\pi^-\pi^0\eta$; $D^+\to K^0_S\pi^+\eta$, $K^0_SK^+\eta$, $K^-\pi^+\pi^+\eta$, $K^0_S\pi^+\pi^0\eta$, $\pi^+\pi^+\pi^-\eta$, and $\pi^+\pi^0\pi^0\eta$. Among these decays, the $D^0\to K^-\pi^+\eta$ and $D^+\to K^0_S\pi^+\eta$ decays have the largest branching fractions, which are $\mathcal{B} (D^0\to K^-\pi^+\eta )=(1.853\pm0.025_{\rm stat}\pm0.031_{\rm syst})\%$ and $\mathcal{B}(D^+\to K^0_S\pi^+\eta)=(1.309\pm0.037_{\rm stat}\pm0.031_{\rm syst})\%$, respectively. We also determine the $CP$ asymmetries for the six decays with highest event yields. No evidence of $CP$ violation is found.

    Comment: 11 pages, 3 figures
    Keywords High Energy Physics - Experiment
    Subject code 551
    Publishing date 2020-04-28
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Book ; Online: Observation of $D^+\to\eta\eta\pi^+$ and improved measurement of $D^{0(+)}\to\eta\pi^+\pi^{-(0)}$

    BESIII Collaboration

    2019  

    Abstract: Using an $e^+e^-$ annihilation data sample corresponding to an integrated luminosity of $2.93\,\rm fb^{-1}$ collected at the center-of-mass energy of 3.773\,GeV with the BESIII detector, we measure the absolute branching fractions of $D^+\to\eta\eta\pi^+$ ...

    Abstract Using an $e^+e^-$ annihilation data sample corresponding to an integrated luminosity of $2.93\,\rm fb^{-1}$ collected at the center-of-mass energy of 3.773\,GeV with the BESIII detector, we measure the absolute branching fractions of $D^+\to\eta\eta\pi^+$, $D^+\to\eta\pi^+\pi^0$, and $D^0\to\eta\pi^+\pi^-$ to be $(2.96 \pm 0.24 \pm 0.13)\times 10^{-3}$, $(2.23 \pm 0.15 \pm 0.11)\times 10^{-3}$, and $(1.20 \pm 0.07 \pm 0.04)\times 10^{-3}$, respectively, where the first uncertainties are statistical and the second ones systematic. The $D^+\to\eta\eta\pi^+$ decay is observed for the first time and the branching fractions of $D^{+(0)}\to\eta\pi^+\pi^{0(-)}$ are measured with much improved precision. In addition we test for $CP$ asymmetries in the separated charge-conjugate branching fractions; no evidence of $CP$ violation is found.

    Comment: 10 pages, 4 figures
    Keywords High Energy Physics - Experiment
    Subject code 551
    Publishing date 2019-12-28
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Book ; Online: Study of $e^+e^-\to\gamma\phi J/\psi$ from $\sqrt{s}=4.600$ to $4.951$ GeV

    BESIII Collaboration / Ablikim, M. / Achasov, M. N. / Adlarson, P. / Albrecht, M. / Aliberti, R. / Amoroso, A. / An, M. R. / An, Q. / Bai, Y. / Bakina, O. / Ferroli, R. Baldini / Balossino, I. / Ban, Y. / Batozskaya, V. / Becker, D. / Begzsuren, K. / Berger, N. / Bertani, M. /
    Bettoni, D. / Bianchi, F. / Bianco, E. / Bloms, J. / Bortone, A. / Boyko, I. / Briere, R. A. / Brueggemann, A. / Cai, H. / Cai, X. / Calcaterra, A. / Cao, G. F. / Cao, N. / Cetin, S. A. / Chang, J. F. / Chang, W. L. / Che, G. R. / Chelkov, G. / Chen, C. / Chen, Chao / Chen, G. / Chen, H. S. / Chen, M. L. / Chen, S. J. / Chen, S. M. / Chen, T. / Chen, X. R. / Chen, X. T. / Chen, Y. B. / Chen, Z. J. / Cheng, W. S.

    2022  

    Abstract: Using data samples with an integrated luminosity of $6.4$~fb$^{-1}$ collected by the BESIII detector operating at the BEPCII storage ring, the process of $e^+e^-\to\gamma\phi J/\psi$ is studied. The processes of $e^+e^-\to\phi\chi_{c1,c2}$, $\chi_{c1,c2}\ ...

    Abstract Using data samples with an integrated luminosity of $6.4$~fb$^{-1}$ collected by the BESIII detector operating at the BEPCII storage ring, the process of $e^+e^-\to\gamma\phi J/\psi$ is studied. The processes of $e^+e^-\to\phi\chi_{c1,c2}$, $\chi_{c1,c2}\to\gamma J/\psi$ are observed with a significance of more than $10\sigma$. The $\sqrt{s}$-dependent cross section of $e^+e^- \to \phi\chi_{c1,c2}$ is measured between 4.600 and 4.951~GeV, and evidence of a resonance structure is found for the first time in the $\phi\chi_{c2}$ process. We also search for the processes of $e^+e^-\to\gamma X(4140)$, $\gamma X(4274)$ and $\gamma X(4500)$ via the $\gamma\phi J/\psi$ final state, but no obvious structures are found. The upper limits on the production cross section times the branching fraction for these processes at the 90% confidence level are reported.

    Comment: 35 pages, 9 figures
    Keywords High Energy Physics - Experiment
    Subject code 612
    Publishing date 2022-10-24
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Book ; Online: First Direct Measurement of the Absolute Branching Fraction of $\Sigma^+ \to \Lambda e^+ \nu_{e}$

    BESIII Collaboration / Ablikim, M. / Achasov, M. N. / Adlarson, P. / Aliberti, R. / Amoroso, A. / An, M. R. / An, Q. / Bai, Y. / Bakina, O. / Ferroli, R. Baldini / Balossino, I. / Ban, Y. / Batozskaya, V. / Becker, D. / Begzsuren, K. / Berger, N. / Bertani, M. / Bettoni, D. /
    Bianchi, F. / Bianco, E. / Bloms, J. / Bortone, A. / Boyko, I. / Briere, R. A. / Brueggemann, A. / Cai, H. / Cai, X. / Calcaterra, A. / Cao, G. F. / Cao, N. / Cetin, S. A. / Chang, J. F. / Chang, T. T. / Chang, W. L. / Che, G. R. / Chelkov, G. / Chen, C. / Chen, Chao / Chen, G. / Chen, H. S. / Chen, M. L. / Chen, S. J. / Chen, S. M. / Chen, T. / Chen, X. R. / Chen, X. T. / Chen, Y. B. / Chen, Y. Q. / Chen, Z. J.

    2022  

    Abstract: The first direct measurement of the absolute branching fraction of $\Sigma^+ \to \Lambda e^+ \nu_{e}$ is reported based on an $e^+e^-$ annihilation sample of $(10087\pm44) \times 10^6$ $J/\psi$ events collected with the BESIII detector at $\sqrt{s}=3.097$ ...

    Abstract The first direct measurement of the absolute branching fraction of $\Sigma^+ \to \Lambda e^+ \nu_{e}$ is reported based on an $e^+e^-$ annihilation sample of $(10087\pm44) \times 10^6$ $J/\psi$ events collected with the BESIII detector at $\sqrt{s}=3.097$ GeV. The branching fraction is determined to be ${\mathcal B}(\Sigma^+ \to \Lambda e^+ \nu_{e}) = [2.93\pm0.74(\rm stat) \pm 0.13(\rm syst)]\times 10^{-5}$, which is the most precise measurement obtained in a single experiment to date and also the first result obtained at a collider experiment. Combining this result with the world average of ${\mathcal B}(\Sigma^- \to \Lambda e^- \bar{\nu}_{e})$ and the lifetimes of $\Sigma^{\pm}$, the ratio, $\frac{\Gamma(\Sigma^- \to \Lambda e^- \bar{\nu}_{e})}{\Gamma(\Sigma^+ \to \Lambda e^+ \nu_{e})}$, is determined to be $1.06 \pm 0.28$, which is within 1.8 standard deviations of the value expected in the absence of second-class currents that are forbidden in the Standard Model.

    Comment: 8 pages, 3 figures
    Keywords High Energy Physics - Experiment ; High Energy Physics - Phenomenology
    Subject code 612
    Publishing date 2022-12-10
    Publishing country us
    Document type Book ; Online
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  8. Book ; Online: Amplitude analysis and branching-fraction measurement of $D_{s}^{+} \to \pi^{+}\pi^{0}\eta^{\prime}$

    BESIII Collaboration / Ablikim, M. / Achasov, M. N. / Adlarson, P. / Albrecht, M. / Aliberti, R. / Amoroso, A. / An, M. R. / An, Q. / Bai, X. H. / Bai, Y. / Bakina, O. / Ferroli, R. Baldini / Balossino, I. / Ban, Y. / Batozskaya, V. / Becker, D. / Begzsuren, K. / Berger, N. /
    Bertani, M. / Bettoni, D. / Bianchi, F. / Bloms, J. / Bortone, A. / Boyko, I. / Briere, R. A. / Brueggemann, A. / Cai, H. / Cai, X. / Calcaterra, A. / Cao, G. F. / Cao, N. / Cetin, S. A. / Chang, J. F. / Chang, W. L. / Chelkov, G. / Chen, C. / Chen, Chao / Chen, G. / Chen, H. S. / Chen, M. L. / Chen, S. J. / Chen, S. M. / Chen, T. / Chen, X. R. / Chen, X. T. / Chen, Y. B. / Chen, Z. J. / Cheng, W. S. / Chu, X.

    2022  

    Abstract: Using data collected with the BESIII detector in $e^+e^-$ collisions at center-of-mass energies between 4.178 and 4.226 GeV and corresponding to 6.32~fb$^{-1}$ of integrated luminosity, we report the amplitude analysis and branching-fraction measurement ... ...

    Abstract Using data collected with the BESIII detector in $e^+e^-$ collisions at center-of-mass energies between 4.178 and 4.226 GeV and corresponding to 6.32~fb$^{-1}$ of integrated luminosity, we report the amplitude analysis and branching-fraction measurement of the $D^+_s \to \pi^+ \pi^0 \eta^{\prime}$ decay. We find that the dominant intermediate process is $D^+_s \to\rho^+ \eta^{\prime}$ and the significances of other resonant and nonresonant processes are all less than $3\sigma$. The upper limits on the branching fractions of $S$-wave and $P$-wave nonresonant components are set to $0.10\%$ and $0.74\%$ at the $90\%$ confidence level, respectively. In addition, the branching fraction of the $D^+_s \to \pi^+ \pi^0 \eta^{\prime}$ decay is measured to be $(6.15\pm0.25(\rm stat.)\pm0.18(\rm syst.))\%$, which receives significant contribution only from $D_s^+\to \rho^+\eta^{\prime}$ according to the amplitude analysis.
    Keywords High Energy Physics - Experiment
    Subject code 551
    Publishing date 2022-02-08
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Book ; Online: Improved measurements of the Dalitz decays $\eta/\eta'\rightarrow\gamma e^{+}e^{-}$

    BESIII Collaboration / Ablikim, M. / Achasov, M. N. / Adlarson, P. / Afedulidis, O. / Ai, X. C. / Aliberti, R. / Amoroso, A. / An, Q. / Bai, Y. / Bakina, O. / Balossino, I. / Ban, Y. / Bao, H. -R. / Batozskaya, V. / Begzsuren, K. / Berger, N. / Berlowski, M. / Bertani, M. /
    Bettoni, D. / Bianchi, F. / Bianco, E. / Bortone, A. / Boyko, I. / Briere, R. A. / Brueggemann, A. / Cai, H. / Cai, X. / Calcaterra, A. / Cao, G. F. / Cao, N. / Cetin, S. A. / Chang, J. F. / Chang, W. L. / Che, G. R. / Chelkov, G. / Chen, C. / Chen, C. H. / Chen, Chao / Chen, G. / Chen, H. S. / Chen, M. L. / Chen, S. J. / Chen, S. L. / Chen, S. M. / Chen, T. / Chen, X. R. / Chen, X. T. / Chen, Y. B. / Chen, Y. Q. / Chen, Z. J. / Chen, Z. Y. / Choi, S. K. / Chu, X. / Cibinetto, G. / Cossio, F. / Cui, J. J. / Dai, H. L. / Dai, J. P. / Dbeyssi, A. / de Boer, R. E. / Dedovich, D. / Deng, C. Q. / Deng, Z. Y. / Denig, A. / Denysenko, I. / Destefanis, M. / De Mori, F. / Ding, B. / Ding, X. X. / Ding, Y. / Dong, J. / Dong, L. Y. / Dong, M. Y. / Dong, X. / Du, M. C. / Du, S. X. / Duan, Z. H. / Egorov, P. / Fan, Y. H. / Fang, J. / Fang, S. S. / Fang, W. X. / Fang, Y. / Fang, Y. Q. / Farinelli, R. / Fava, L. / Feldbauer, F. / Felici, G. / Feng, C. Q. / Feng, J. H. / Feng, Y. T. / Fischer, K. / Fritsch, M. / Fu, C. D. / Fu, J. L. / Fu, Y. W. / Gao, H. / Gao, Y. N. / Gao, Yang / Garbolino, S. / Garzia, I. / Ge, P. T. / Ge, Z. W. / Geng, C. / Gersabeck, E. M. / Gilman, A. / Goetzen, K. / Gong, L. / Gong, W. X. / Gradl, W. / Gramigna, S. / Greco, M. / Gu, M. H. / Gu, Y. T. / Guan, C. Y. / Guan, Z. L. / Guo, A. Q. / Guo, L. B. / Guo, M. J. / Guo, R. P. / Guo, Y. P. / Guskov, A. / Gutierrez, J. / Han, K. L. / Han, T. T. / Hao, X. Q. / Harris, F. A. / He, K. K. / He, K. L. / Heinsius, F. H. / Heinz, C. H. / Heng, Y. K. / Herold, C. / Holtmann, T. / Hong, P. C. / Hou, G. Y. / Hou, X. T. / Hou, Y. R. / Hou, Z. L. / Hu, B. Y. / Hu, H. M. / Hu, J. F. / Hu, T. / Hu, Y. / Huang, G. S. / Huang, K. X. / Huang, L. Q. / Huang, X. T. / Huang, Y. P. / Hussain, T. / Hölzken, F. / Hüsken, N / der Wiesche, N. in / Irshad, M. / Jackson, J. / Janchiv, S. / Jeong, J. H. / Ji, Q. / Ji, Q. P. / Ji, W. / Ji, X. B. / Ji, X. L. / Ji, Y. Y. / Jia, X. Q. / Jia, Z. K. / Jiang, D. / Jiang, H. B. / Jiang, P. C. / Jiang, S. S. / Jiang, T. J. / Jiang, X. S. / Jiang, Y. / Jiao, J. B. / Jiao, J. K. / Jiao, Z. / Jin, S. / Jin, Y. / Jing, M. Q. / Jing, X. M. / Johansson, T. / Kabana, S. / Kalantar-Nayestanaki, N. / Kang, X. L. / Kang, X. S. / Kavatsyuk, M. / Ke, B. C. / Khachatryan, V. / Khoukaz, A. / Kiuchi, R. / Kolcu, O. B. / Kopf, B. / Kuessner, M. / Kui, X. / Kupsc, A. / Kühn, W. / Lane, J. J. / Larin, P. / Lavezzi, L. / Lei, T. T. / Lei, Z. H. / Leithoff, H. / Lellmann, M. / Lenz, T. / Li, C. / Li, C. H. / Li, Cheng / Li, D. M. / Li, F. / Li, G. / Li, H. / Li, H. B. / Li, H. J. / Li, H. N. / Li, Hui / Li, J. R. / Li, J. S. / Li, Ke / Li, L. J / Li, L. K. / Li, Lei / Li, M. H. / Li, P. R. / Li, Q. M. / Li, Q. X. / Li, R. / Li, S. X. / Li, T. / Li, W. D. / Li, W. G. / Li, X. / Li, X. H. / Li, X. L. / Li, Xiaoyu / Li, Y. G. / Li, Z. J. / Li, Z. X. / Liang, C. / Liang, H. / Liang, Y. F. / Liang, Y. T. / Liao, G. R. / Liao, L. Z. / Liao, Y. P. / Libby, J. / Limphirat, A. / Lin, D. X. / Lin, T. / Liu, B. J. / Liu, B. X. / Liu, C. / Liu, C. X. / Liu, F. H. / Liu, Fang / Liu, Feng / Liu, G. M. / Liu, H. / Liu, H. B. / Liu, H. M. / Liu, Huanhuan / Liu, Huihui / Liu, J. B. / Liu, J. Y. / Liu, K. / Liu, K. Y. / Liu, Ke / Liu, L. / Liu, L. C. / Liu, Lu / Liu, M. H. / Liu, P. L. / Liu, Q. / Liu, S. B. / Liu, T. / Liu, W. K. / Liu, W. M. / Liu, X. / Liu, Y. / Liu, Y. B. / Liu, Z. A. / Liu, Z. D. / Liu, Z. Q. / Lou, X. C. / Lu, F. X. / Lu, H. J. / Lu, J. G. / Lu, X. L. / Lu, Y. / Lu, Y. P. / Lu, Z. H. / Luo, C. L. / Luo, M. X. / Luo, T. / Luo, X. L. / Lyu, X. R. / Lyu, Y. F. / Ma, F. C. / Ma, H. / Ma, H. L. / Ma, J. L. / Ma, L. L. / Ma, M. M. / Ma, Q. M. / Ma, R. Q. / Ma, X. T. / Ma, X. Y. / Ma, Y. / Ma, Y. M. / Maas, F. E. / Maggiora, M. / Malde, S. / Mangoni, A. / Mao, Y. J. / Mao, Z. P. / Marcello, S. / Meng, Z. X. / Messchendorp, J. G. / Mezzadri, G. / Miao, H. / Min, T. J. / Mitchell, R. E. / Mo, X. H. / Moses, B. / Muchnoi, N. Yu. / Muskalla, J. / Nefedov, Y. / Nerling, F. / Nikolaev, I. B. / Ning, Z. / Nisar, S. / Niu, Q. L. / Niu, W. D. / Niu, Y. / Olsen, S. L. / Ouyang, Q. / Pacetti, S. / Pan, X. / Pan, Y. / Pathak, A. / Patteri, P. / Pei, Y. P. / Pelizaeus, M. / Peng, H. P. / Peng, Y. Y. / Peters, K. / Ping, J. L. / Ping, R. G. / Plura, S. / Prasad, V. / Qi, F. Z. / Qi, H. / Qi, H. R. / Qi, M. / Qi, T. Y. / Qian, S. / Qian, W. B. / Qiao, C. F. / Qin, J. J. / Qin, L. Q. / Qin, X. S. / Qin, Z. H. / Qiu, J. F. / Qu, S. Q. / Qu, Z. H. / Redmer, C. F. / Ren, K. J. / Rivetti, A. / Rolo, M. / Rong, G. / Rosner, Ch. / Ruan, S. N. / Salone, N. / Sarantsev, A. / Schelhaas, Y. / Schoenning, K. / Scodeggio, M. / Shan, K. Y. / Shan, W. / Shan, X. Y. / Shangguan, J. F. / Shao, L. G. / Shao, M. / Shen, C. P. / Shen, H. F. / Shen, W. H. / Shen, X. Y. / Shi, B. A. / Shi, H. C. / Shi, J. L. / Shi, J. Y. / Shi, Q. Q. / Shi, R. S. / Shi, S. Y. / Shi, X. / Song, J. J. / Song, T. Z. / Song, W. M. / Song, Y. J. / Sosio, S. / Spataro, S. / Stieler, F. / Su, Y. J. / Sun, G. B. / Sun, G. X. / Sun, H. / Sun, H. K. / Sun, J. F. / Sun, K. / Sun, L. / Sun, S. S. / Sun, T. / Sun, W. Y. / Sun, Y. / Sun, Y. J. / Sun, Y. Z. / Sun, Z. Q. / Sun, Z. T. / Tang, C. J. / Tang, G. Y. / Tang, J. / Tang, Y. A. / Tao, L. Y. / Tao, Q. T. / Tat, M. / Teng, J. X. / Thoren, V. / Tian, W. H. / Tian, Y. / Tian, Z. F. / Uman, I. / Wan, Y. / Wang, S. J. / Wang, B. / Wang, B. L. / Wang, Bo / Wang, D. Y. / Wang, F. / Wang, H. J. / Wang, J. P. / Wang, K. / Wang, L. L. / Wang, M. / Wang, Meng / Wang, N. Y. / Wang, S. / Wang, T. / Wang, T. J. / Wang, W. / Wang, W. P. / Wang, X. / Wang, X. F. / Wang, X. J. / Wang, X. L. / Wang, X. N. / Wang, Y. / Wang, Y. D. / Wang, Y. F. / Wang, Y. L. / Wang, Y. N. / Wang, Y. Q. / Wang, Yaqian / Wang, Yi / Wang, Z. / Wang, Z. L. / Wang, Z. Y. / Wang, Ziyi / Wei, D. / Wei, D. H. / Weidner, F. / Wen, S. P. / Wen, Y. R. / Wiedner, U. / Wilkinson, G. / Wolke, M. / Wollenberg, L. / Wu, C. / Wu, J. F. / Wu, L. H. / Wu, L. J. / Wu, X. / Wu, X. H. / Wu, Y. / Wu, Y. H. / Wu, Y. J. / Wu, Z. / Xia, L. / Xian, X. M. / Xiang, B. H. / Xiang, T. / Xiao, D. / Xiao, G. Y. / Xiao, S. Y. / Xiao, Y. L. / Xiao, Z. J. / Xie, C. / Xie, X. H. / Xie, Y. / Xie, Y. G. / Xie, Y. H. / Xie, Z. P. / Xing, T. Y. / Xu, C. F. / Xu, C. J. / Xu, G. F. / Xu, H. Y. / Xu, Q. J. / Xu, Q. N. / Xu, W. / Xu, W. L. / Xu, X. P. / Xu, Y. C. / Xu, Z. P. / Xu, Z. S. / Yan, F. / Yan, L. / Yan, W. B. / Yan, W. C. / Yan, X. Q. / Yang, H. J. / Yang, H. L. / Yang, H. X. / Yang, Tao / Yang, Y. / Yang, Y. F. / Yang, Y. X. / Yang, Yifan / Yang, Z. W. / Yao, Z. P. / Ye, M. / Ye, M. H. / Yin, J. H. / You, Z. Y. / Yu, B. X. / Yu, C. X. / Yu, G. / Yu, J. S. / Yu, T. / Yu, X. D. / Yuan, C. Z. / Yuan, J. / Yuan, L. / Yuan, S. C. / Yuan, Y. / Yuan, Z. Y. / Yue, C. X. / Zafar, A. A. / Zeng, F. R. / Zeng, S. H. / Zeng, X. / Zeng, Y. / Zeng, Y. J. / Zhai, X. Y. / Zhai, Y. C. / Zhan, Y. H. / Zhang, A. Q. / Zhang, B. L. / Zhang, B. X. / Zhang, D. H. / Zhang, G. Y. / Zhang, H. / Zhang, H. C. / Zhang, H. H. / Zhang, H. Q. / Zhang, H. Y. / Zhang, J. / Zhang, J. J. / Zhang, J. L. / Zhang, J. Q. / Zhang, J. W. / Zhang, J. X. / Zhang, J. Y. / Zhang, J. Z. / Zhang, Jianyu / Zhang, L. M. / Zhang, Lei / Zhang, P. / Zhang, Q. Y. / Zhang, Shuihan / Zhang, Shulei / Zhang, X. D. / Zhang, X. M. / Zhang, X. Y. / Zhang, Y. / Zhang, Y. T. / Zhang, Y. H. / Zhang, Y. M. / Zhang, Yan / Zhang, Yao / Zhang, Z. D. / Zhang, Z. H. / Zhang, Z. L. / Zhang, Z. Y. / Zhao, G. / Zhao, J. Y. / Zhao, J. Z. / Zhao, Lei / Zhao, Ling / Zhao, M. G. / Zhao, R. P. / Zhao, S. J. / Zhao, Y. B. / Zhao, Y. X. / Zhao, Z. G. / Zhemchugov, A. / Zheng, B. / Zheng, J. P. / Zheng, W. J. / Zheng, Y. H. / Zhong, B. / Zhong, X. / Zhou, H. / Zhou, J. Y. / Zhou, L. P. / Zhou, X. / Zhou, X. K. / Zhou, X. R. / Zhou, X. Y. / Zhou, Y. Z. / Zhu, J. / Zhu, K. / Zhu, K. J. / Zhu, L. / Zhu, L. X. / Zhu, S. H. / Zhu, S. Q. / Zhu, T. J. / Zhu, W. J. / Zhu, Y. C. / Zhu, Z. A. / Zou, J. H. / Zu, J.

    2024  

    Abstract: Based on a data sample of 10 billion $J/\psi$ events collected with the BESIII detector, improved measurements of the Dalitz decays $\eta/\eta'\rightarrow\gamma e^+e^-$ are performed, where the $\eta$ and $\eta'$ are produced through the radiative decays ...

    Abstract Based on a data sample of 10 billion $J/\psi$ events collected with the BESIII detector, improved measurements of the Dalitz decays $\eta/\eta'\rightarrow\gamma e^+e^-$ are performed, where the $\eta$ and $\eta'$ are produced through the radiative decays $J/\psi\rightarrow\gamma \eta/\eta'$. The branching fractions of $\eta\rightarrow\gamma e^+e^-$ and $\eta'\rightarrow\gamma e^+e^-$ are measured to be $(7.07 \pm 0.05 \pm 0.23)\times10^{-3}$ and $(4.83\pm0.07\pm0.14)\times10^{-4}$, respectively. Within the single pole model, the parameter of electromagnetic transition form factor for $\eta\rightarrow\gamma e^+e^-$ is determined to be $\Lambda_{\eta}=(0.749 \pm 0.027 \pm 0.007)~ {\rm GeV}/c^{2}$. Within the multi-pole model, we extract the electromagnetic transition form factors for $\eta'\rightarrow\gamma e^+e^-$ to be $\Lambda_{\eta'} = (0.802 \pm 0.007\pm 0.008)~ {\rm GeV}/c^{2}$ and $\gamma_{\eta'} = (0.113\pm0.010\pm0.002)~ {\rm GeV}/c^{2}$. The results are consistent with both theoretical predictions and previous measurements. The characteristic sizes of the interaction regions for the $\eta$ and $\eta'$ are calculated to be $(0.645 \pm 0.023 \pm 0.007 )~ {\rm fm}$ and $(0.596 \pm 0.005 \pm 0.006)~ {\rm fm}$, respectively. In addition, we search for the dark photon in $\eta/\eta^\prime\rightarrow\gamma e^{+}e^{-}$, and the upper limits of the branching fractions as a function of the dark photon are given at 90\% confidence level.
    Keywords High Energy Physics - Experiment
    Subject code 551
    Publishing date 2024-01-17
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Book ; Online: Measurement of the branching fraction of the doubly Cabibbo-suppressed decay $D^0\to K^+\pi^-\pi^0$ and search for $D^0\to K^+\pi^-\pi^0\pi^0$

    BESIII Collaboration / Ablikim, M. / Achasov, M. N. / Adlarson, P. / Albrecht, M. / Aliberti, R. / Amoroso, A. / An, M. R. / An, Q. / Bai, X. H. / Bai, Y. / Bakina, O. / Ferroli, R. Baldini / Balossino, I. / Ban, Y. / Batozskaya, V. / Becker, D. / Begzsuren, K. / Berger, N. /
    Bertani, M. / Bettoni, D. / Bianchi, F. / Bloms, J. / Bortone, A. / Boyko, I. / Briere, R. A. / Brueggemann, A. / Cai, H. / Cai, X. / Calcaterra, A. / Cao, G. F. / Cao, N. / Cetin, S. A. / Chang, J. F. / Chang, W. L. / Chelkov, G. / Chen, C. / Chen, G. / Chen, H. S. / Chen, M. L. / Chen, S. J. / Chen, T. / Chen, X. R. / Chen, X. T. / Chen, Y. B. / Chen, Z. J. / Cheng, W. S. / Cibinetto, G. / Cossio, F. / Cui, J. J. / Dai, H. L. / Dai, J. P. / Dbeyssi, A. / de Boer, R. E. / Dedovich, D. / Deng, Z. Y. / Denig, A. / Denysenko, I. / Destefanis, M. / De Mori, F. / Ding, Y. / Dong, J. / Dong, L. Y. / Dong, M. Y. / Dong, X. / Du, S. X. / Egorov, P. / Fan, Y. L. / Fang, J. / Fang, S. S. / Fang, Y. / Farinelli, R. / Fava, L. / Feldbauer, F. / Felici, G. / Feng, C. Q. / Feng, J. H. / Fischer, K / Fritsch, M. / Fu, C. D. / Gao, H. / Gao, Y. N. / Gao, Yang / Garbolino, S. / Garzia, I. / Ge, P. T. / Ge, Z. W. / Geng, C. / Gersabeck, E. M. / Gilman, A / Goetzen, K. / Gong, L. / Gong, W. X. / Gradl, W. / Greco, M. / Gu, L. M. / Gu, M. H. / Guan, C. Y / Guo, A. Q. / Guo, L. B. / Guo, R. P. / Guo, Y. P. / Guskov, A. / Han, T. T. / Han, W. Y. / Hao, X. Q. / Harris, F. A. / He, K. K. / He, K. L. / Heinsius, F. H. / Heinz, C. H. / Heng, Y. K. / Herold, C. / Himmelreich, M. / Holtmann, T. / Hou, G. Y. / Hou, Y. R. / Hou, Z. L. / Hu, H. M. / Hu, J. F. / Hu, T. / Hu, Y. / Huang, G. S. / Huang, K. X. / Huang, L. Q. / Huang, X. T. / Huang, Y. P. / Huang, Z. / Hussain, T. / Hüsken, N / Imoehl, W. / Irshad, M. / Jackson, J. / Jaeger, S. / Janchiv, S. / Ji, Q. / Ji, Q. P. / Ji, X. B. / Ji, X. L. / Ji, Y. Y. / Jia, Z. K. / Jiang, H. B. / Jiang, S. S. / Jiang, X. S. / Jiang, Y. / Jiao, J. B. / Jiao, Z. / Jin, S. / Jin, Y. / Jing, M. Q. / Johansson, T. / Kalantar-Nayestanaki, N. / Kang, X. S. / Kappert, R. / Kavatsyuk, M. / Ke, B. C. / Keshk, I. K. / Khoukaz, A. / Kiese, P. / Kiuchi, R. / Kliemt, R. / Koch, L. / Kolcu, O. B. / Kopf, B. / Kuemmel, M. / Kuessner, M. / Kupsc, A. / Kühn, W. / Lane, J. J. / Lange, J. S. / Larin, P. / Lavania, A. / Lavezzi, L. / Lei, Z. H. / Leithoff, H. / Lellmann, M. / Lenz, T. / Li, C. / Li, C. H. / Li, Cheng / Li, D. M. / Li, F. / Li, G. / Li, H. / Li, H. B. / Li, H. J. / Li, H. N. / Li, J. Q. / Li, J. S. / Li, J. W. / Li, Ke / Li, L. J / Li, L. K. / Li, Lei / Li, M. H. / Li, P. R. / Li, S. X. / Li, S. Y. / Li, T. / Li, W. D. / Li, W. G. / Li, X. H. / Li, X. L. / Li, Xiaoyu / Liang, H. / Liang, Y. F. / Liang, Y. T. / Liao, G. R. / Liao, L. Z. / Libby, J. / Limphirat, A. / Lin, C. X. / Lin, D. X. / Lin, T. / Liu, B. J. / Liu, C. X. / Liu, D. / Liu, F. H. / Liu, Fang / Liu, Feng / Liu, G. M. / Liu, H. M. / Liu, Huanhuan / Liu, Huihui / Liu, J. B. / Liu, J. L. / Liu, J. Y. / Liu, K. / Liu, K. Y. / Liu, Ke / Liu, L. / Liu, M. H. / Liu, P. L. / Liu, Q. / Liu, S. B. / Liu, T. / Liu, W. K. / Liu, W. M. / Liu, X. / Liu, Y. / Liu, Y. B. / Liu, Z. A. / Liu, Z. Q. / Lou, X. C. / Lu, F. X. / Lu, H. J. / Lu, J. G. / Lu, X. L. / Lu, Y. / Lu, Y. P. / Lu, Z. H. / Luo, C. L. / Luo, M. X. / Luo, T. / Luo, X. L. / Lyu, X. R. / Lyu, Y. F. / Ma, F. C. / Ma, H. L. / Ma, L. L. / Ma, M. M. / Ma, Q. M. / Ma, R. Q. / Ma, R. T. / Ma, X. Y. / Ma, Y. / Maas, F. E. / Maggiora, M. / Maldaner, S. / Malde, S. / Malik, Q. A. / Mangoni, A. / Mao, Y. J. / Mao, Z. P. / Marcello, S. / Meng, Z. X. / Messchendorp, J. G. / Mezzadri, G. / Miao, H. / Min, T. J. / Mitchell, R. E. / Mo, X. H. / Muchnoi, N. Yu. / Muramatsu, H. / Nakhoul, S. / Nefedov, Y. / Nerling, F. / Nikolaev, I. B. / Ning, Z. / Nisar, S. / Niu, Y. / Olsen, S. L. / Ouyang, Q. / Pacetti, S. / Pan, X. / Pan, Y. / Pathak, A. / Pelizaeus, M. / Peng, H. P. / Peters, K. / Pettersson, J. / Ping, J. L. / Ping, R. G. / Plura, S. / Pogodin, S. / Poling, R. / Prasad, V. / Qi, H. / Qi, H. R. / Qi, M. / Qi, T. Y. / Qian, S. / Qian, W. B. / Qian, Z. / Qiao, C. F. / Qin, J. J. / Qin, L. Q. / Qin, X. P. / Qin, X. S. / Qin, Z. H. / Qiu, J. F. / Qu, S. Q. / Rashid, K. H. / Ravindran, K. / Redmer, C. F. / Ren, K. J. / Rivetti, A. / Rodin, V. / Rolo, M. / Rong, G. / Rosner, Ch. / Rump, M. / Sang, H. S. / Sarantsev, A. / Schelhaas, Y. / Schnier, C. / Schoenning, K. / Scodeggio, M. / Shan, K. Y. / Shan, W. / Shan, X. Y. / Shangguan, J. F. / Shao, L. G. / Shao, M. / Shen, C. P. / Shen, H. F. / Shen, X. Y. / Shi, B. -A. / Shi, H. C. / Shi, R. S. / Shi, X. / Shi, X. D / Song, J. J. / Song, W. M. / Song, Y. X. / Sosio, S. / Spataro, S. / Stieler, F. / Su, K. X. / Su, P. P. / Su, Y. -J. / Sun, G. X. / Sun, H. / Sun, H. K. / Sun, J. F. / Sun, L. / Sun, S. S. / Sun, T. / Sun, W. Y. / Sun, X / Sun, Y. J. / Sun, Y. Z. / Sun, Z. T. / Tan, Y. H. / Tan, Y. X. / Tang, C. J. / Tang, G. Y. / Tang, J. / Tao, L. Y / Tao, Q. T. / Teng, J. X. / Thoren, V. / Tian, W. H. / Tian, Y. / Uman, I. / Wang, B. / Wang, B. L. / Wang, C. W. / Wang, D. Y. / Wang, F. / Wang, H. J. / Wang, H. P. / Wang, K. / Wang, L. L. / Wang, M. / Wang, M. Z. / Wang, Meng / Wang, S. / Wang, T. / Wang, T. J. / Wang, W. / Wang, W. H. / Wang, W. P. / Wang, X. / Wang, X. F. / Wang, X. L. / Wang, Y. D. / Wang, Y. F. / Wang, Y. H. / Wang, Y. Q. / Wang, Z. / Wang, Z. Y. / Wang, Ziyi / Wei, D. H. / Weidner, F. / Wen, S. P. / White, D. J. / Wiedner, U. / Wilkinson, G. / Wolke, M. / Wollenberg, L. / Wu, J. F. / Wu, L. H. / Wu, L. J. / Wu, X. / Wu, X. H. / Wu, Y. / Wu, Z. / Xia, L. / Xiang, T. / Xiao, G. Y. / Xiao, H. / Xiao, S. Y. / Xiao, Y. L. / Xiao, Z. J. / Xie, C. / Xie, X. H. / Xie, Y. / Xie, Y. G. / Xie, Y. H. / Xie, Z. P. / Xing, T. Y. / Xu, C. F. / Xu, C. J. / Xu, G. F. / Xu, H. Y. / Xu, Q. J. / Xu, S. Y. / Xu, X. P. / Xu, Y. C. / Xu, Z. P. / Yan, F. / Yan, L. / Yan, W. B. / Yan, W. C. / Yang, H. J. / Yang, H. L. / Yang, H. X. / Yang, L. / Yang, S. L. / Yang, Y. X. / Yang, Yifan / Ye, M. / Ye, M. H. / Yin, J. H. / You, Z. Y. / Yu, B. X. / Yu, C. X. / Yu, G. / Yu, J. S. / Yu, T. / Yuan, C. Z. / Yuan, L. / Yuan, S. C. / Yuan, X. Q. / Yuan, Y. / Yuan, Z. Y. / Yue, C. X. / Zafar, A. A. / Zeng, F. R. / Zeng, X. Zeng / Zeng, Y. / Zhan, Y. H. / Zhang, A. Q. / Zhang, B. L. / Zhang, B. X. / Zhang, G. Y. / Zhang, H. / Zhang, H. H. / Zhang, H. Y. / Zhang, J. L. / Zhang, J. Q. / Zhang, J. W. / Zhang, J. Y. / Zhang, J. Z. / Zhang, Jianyu / Zhang, Jiawei / Zhang, L. M. / Zhang, L. Q. / Zhang, Lei / Zhang, P. / Zhang, Q. Y. / Zhang, Shulei / Zhang, X. D. / Zhang, X. M. / Zhang, X. Y. / Zhang, Y. / Zhang, Y. T. / Zhang, Y. H. / Zhang, Yan / Zhang, Yao / Zhang, Z. H. / Zhang, Z. Y. / Zhao, G. / Zhao, J. / Zhao, J. Y. / Zhao, J. Z. / Zhao, Lei / Zhao, Ling / Zhao, M. G. / Zhao, Q. / Zhao, S. J. / Zhao, Y. B. / Zhao, Y. X. / Zhao, Z. G. / Zhemchugov, A. / Zheng, B. / Zheng, J. P. / Zheng, Y. H. / Zhong, B. / Zhong, C. / Zhong, X. / Zhou, H. / Zhou, L. P. / Zhou, X. / Zhou, X. K. / Zhou, X. R. / Zhou, X. Y. / Zhou, Y. Z. / Zhu, J. / Zhu, K. / Zhu, K. J. / Zhu, L. X. / Zhu, S. H. / Zhu, S. Q. / Zhu, T. J. / Zhu, W. J. / Zhu, Y. C. / Zhu, Z. A. / Zou, B. S. / Zou, J. H.

    2022  

    Abstract: Using $2.93\,\rm fb^{-1}$ of $e^+e^-$ collision data collected at a center-of-mass energy of 3.773\,GeV with the BESIII detector, we present a measurement of the branching fraction of the doubly Cabibbo-suppressed (DCS) decay $D^0\to K^+\pi^-\pi^0$ and a ...

    Abstract Using $2.93\,\rm fb^{-1}$ of $e^+e^-$ collision data collected at a center-of-mass energy of 3.773\,GeV with the BESIII detector, we present a measurement of the branching fraction of the doubly Cabibbo-suppressed (DCS) decay $D^0\to K^+\pi^-\pi^0$ and a search for the DCS decay $D^0\to K^+\pi^-\pi^0\pi^0$. The branching fraction of $D^0\to K^+\pi^-\pi^0$ is determined to be $[3.13^{+0.60}_{-0.56}({\rm stat}) \pm 0.09({\rm syst})] \times 10^{-4}$. No signal is observed for $D^0\to K^+\pi^-\pi^0\pi^0$ and an upper limit of $3.6 \times 10^{-4}$ is set on the branching fraction at the 90\% C.L. We combine these results with the world-average branching fractions of their counterpart Cabibbo-favored decays to determine the ratios of the doubly Cabibbo-suppressed over the Cabibbo-favored branching fractions, ${\mathcal B}(D^0\to K^+\pi^-\pi^0)/{\mathcal B}(D^0\to K^-\pi^+\pi^0)=(0.22\pm 0.04)\%$~and ${\mathcal B}(D^0\to K^+\pi^-\pi^0\pi^0)/{\mathcal B}(D^0\to K^-\pi^+\pi^0\pi^0)<0.40\%$ at the 90\% C.L., which correspond to $(0.75\pm 0.14)\tan^{4} \theta_C$~and $1.37\times \tan^{4} \theta_C$, respectively, where $\theta_C$ is the Cabibbo angle.
    Keywords High Energy Physics - Experiment
    Subject code 612
    Publishing date 2022-03-03
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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