اشترك بالحزمة الذهبية واحصل على وصول غير محدود شمرا أكاديميا
تسجيل مستخدم جديدImproved measurements of the absolute branching fractions of the inclusive decays $D^{+(0)}tophi X$
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By analyzing 2.93 fb$^{-1}$ of $e^+e^-$ annihilation data taken at the center-of-mass energy $sqrt s=$ 3.773 GeV with the BESIII detector, we determine the branching fractions of the inclusive decays $D^+tophi X$ and $D^0tophi X$ to be $(1.135pm0.034pm0.031)%$ and $(1.091pm0.027pm0.035)%$, respectively, where $X$ denotes any possible particle combination. The first uncertainties are statistical and the second systematic. We also determine the branching fractions of the decays $Dtophi X$ and their charge conjugate modes $bar{D}tophi bar{X}$ separately for the first time, and no significant CP asymmetry is observed.
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Based on 2.93~fb$^{-1}$ $e^+e^-$ collision data taken at center-of-mass energy of 3.773 GeV by the BESIII detector, we report the measurements of the absolute branching fractions of $D^0to K^+K^-pi^0pi^0$, $D^0to K^0_SK^0_Spi^+pi^-$, $D^0to K^0_SK^-p
i^+pi^0$, $D^0to K^0_SK^+pi^-pi^0$, $D^+to K^+K^-pi^+pi^0$, $D^+to K^0_SK^+pi^0pi^0$, $D^+to K^0_SK^-pi^+pi^+$, $D^+to K^0_SK^+pi^+pi^-$, and $D^+to K^0_SK^0_Spi^+pi^0$. The decays $D^0to K^+K^-pi^0pi^0$, $D^0to K^0_SK^-pi^+pi^0$, $D^0to K^0_SK^+pi^-pi^0$, $D^+to K^0_SK^0_Spi^+pi^0$, and $D^+to K^0_SK^+pi^0pi^0$ are observed for the first time. The branching fractions of the decays $D^0to K^0_SK^0_Spi^+pi^-$, $D^+to K^+K^-pi^+pi^0$, $D^+to K^0_SK^-pi^+pi^+$, and $D^+to K^0_SK^+pi^+pi^-$ are measured with improved precision compared to the world-average values.
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., $D^0to K^-pi^+eta$, $K^0_Spi^0eta$, $K^+K^-eta$, $K^0_SK^0_Seta$, $K^-pi^+pi^0eta$, $K^0_Spi^+pi^-eta$, $K^0_Spi^0pi^0eta$, and $pi^+pi^-pi^0eta$; $D^+to K^0_Spi^+eta$, $K^0_SK^+eta$, $K^-pi^+pi^+eta$, $K^0_Spi^+pi^0eta$, $pi^+pi^+pi^-eta$, and $pi^+pi^0pi^0eta$. Among these decays, the $D^0to K^-pi^+eta$ and $D^+to K^0_Spi^+eta$ decays have the largest branching fractions, which are $mathcal{B} (D^0to K^-pi^+eta )=(1.853pm0.025_{rm stat}pm0.031_{rm syst})%$ and $mathcal{B}(D^+to K^0_Spi^+eta)=(1.309pm0.037_{rm stat}pm0.031_{rm syst})%$, respectively. We also determine the $CP$ asymmetries for the six decays with highest event yields. No evidence of $CP$ violation is found.
Using a data sample of $e^+e^-$ collision data with an integrated luminosity of 2.93 fb$^{-1}$ taken at the center-of-mass energy $sqrt s= 3.773$~GeV with the BESIII detector operating at the BEPCII storage rings, we measure the absolute branching fr
actions of the two-body hadronic decays $D^+to pi^+pi^0$, $K^+ pi^0$, $pi^+ eta$, $K^+eta$, $pi^+eta^prime$, $K^+eta^prime$, $K_S^0 pi^+$, $K_S^0 K^+$, and $D^0to pi^+ pi^-$, $K^+ K^-$, $K^mp pi^pm$, $K_S^0 pi^0$, $K_S^0 eta$, $K_S^0 eta^prime$. Our results are consistent with previous measurements within uncertainties. Among them, the branching fractions for $D^+topi^+pi^0$, $K^+pi^0$, $pi^+eta$, $pi^+eta^prime$, $K_S^0 pi^+$, $K_S^0 K^+$ and $D^0 to K_S^0 pi^0$, $K_S^0 eta$, $K_S^0 eta^prime$ are determined with improved precision compared to the world average values.
We present the first measurements of absolute branching fractions of $Xi_c^0$ decays into $Xi^- pi^+$, $Lambda K^- pi^+$, and $p K^- K^- pi^+$ final states. The measurements are made using a data set comprising $(772pm 11)times 10^{6}$ $Bbar{B}$ pair
s collected at the $Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ collider. We first measure the absolute branching fraction for $B^- to bar{Lambda}_c^- Xi_c^0$ using a missing-mass technique; the result is ${cal B}(B^- to bar{Lambda}_c^- Xi_c^0) = (9.51 pm 2.10 pm 0.88) times 10^{-4}$. We subsequently measure the product branching fractions ${cal B}(B^- to bar{Lambda}_c^- Xi_c^0){cal B}(Xi_c^0 to Xi^- pi^+)$, ${cal B}( B^- to bar{Lambda}_c^- Xi_c^0) {cal B}(Xi_c^0 to Lambda K^- pi^+)$, and ${cal B}( B^- to bar{Lambda}_c^- Xi_c^0) {cal B}(Xi_c^0 to p K^- K^- pi^+)$ with improved precision. Dividing these product branching fractions by the result for $B^- to bar{Lambda}_c^- Xi_c^0$ yields the following branching fractions: ${cal B}(Xi_c^0 to Xi^- pi^+)= (1.80 pm 0.50 pm 0.14)%$, ${cal B}(Xi_c^0 to Lambda K^- pi^+)=(1.17 pm 0.37 pm 0.09)%$, and ${cal B}(Xi_c^0 to p K^- K^- pi^+)=(0.58 pm 0.23 pm 0.05)%.$ For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for ${cal B}(Xi_c^0 to Xi^- pi^+)$ can be combined with $Xi_c^0$ branching fractions measured relative to $Xi_c^0 to Xi^- pi^+$ to yield other absolute $Xi_c^0$ branching fractions.
Using $e^+e^-$ collision data corresponding to an integrated luminosity of 2.93 fb$^{-1}$ taken at a center-of-mass energy of 3.773 GeV with the BESIII detector, we determine the absolute branching fractions $mathcal{B}(D^+rightarrow K_S^0 K^+)$ = $(
3.02 pm 0.09 pm 0.08)times10^{-3}$, $mathcal{B}(D^+rightarrow K_S^0 K^+ pi^0)$ = $(5.07 pm 0.19 pm 0.23)times10^{-3}$, $mathcal{B}(D^+rightarrow K_L^0 K^+)$ = $(3.21 pm 0.11 pm 0.11)times10^{-3}$, and $mathcal{B}(D^+rightarrow K_L^0 K^+ pi^0)$ = $(5.24 pm 0.22 pm 0.22)times10^{-3}$, where the first and second uncertainties are statistical and systematic, respectively. The branching fraction wbrksk is consistent with the world average value and the other three branching fractions are measured for the first time. We also measure the $CP$ asymmetries for the four decays and do not find a significant deviation from zero.
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