A5016309733- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Particle Accelerators and Free-Electron Lasers
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Scheduling and Optimization Algorithms
- Metaheuristic Optimization Algorithms Research
- Metallurgy and Material Forming
- Scientific Research and Discoveries
- Catalysis and Hydrodesulfurization Studies
- Metal Forming Simulation Techniques
- Process Optimization and Integration
- Cosmology and Gravitation Theories
Northeastern University
2023-2024
With the data samples taken at center-of-mass energies from 2.00 to 3.08 GeV with BESIII detector BEPCII collider, a partial wave analysis on $e^{+}e^{-}\rightarrow\pi^{+}\pi^{-}\pi^{0}$ process is performed. The Born cross sections for and its intermediate processes $e^{+}e^{-}\rightarrow\rho\pi$ $\rho(1450)\pi$ are measured as functions of $\sqrt{s}$. results consistent previous initial state radiation method within one standard deviation, improve uncertainty by factor ten. By fitting line...
We report a first study of the semileptonic decay $D^0\rightarrow K^-\pi^0\mu^{+}\nu_{\mu}$ by analyzing an $e^+e^-$ annihilation data sample $7.9~\mathrm{fb}^{-1}$ collected at center-of-mass energy 3.773 GeV with BESIII detector. The absolute branching fraction $D^0\to is measured for time to be $(0.729 \pm 0.014_{\rm stat} 0.011_{\rm syst})\%$. Based on amplitude analysis, $S\text{-}{\rm wave}$ contribution determined $(5.76 0.35_{\rm 0.29_{\rm syst})\%$ total rate in addition dominated...
The $e^+e^-\rightarrow D_s^+D_{s1}(2536)^-$ and D_s^+D^*_{s2}(2573)^-$ processes are studied using data samples collected with the BESIII detector at center-of-mass energies from 4.530 to 4.946~GeV. absolute branching fractions of $D_{s1}(2536)^- \rightarrow \bar{D}^{*0}K^-$ $D_{s2}^*(2573)^- \bar{D}^0K^-$ measured for first time be $(35.9\pm 4.8\pm 3.5)\%$ $(37.4\pm 3.1\pm 4.6)\%$, respectively. measurements in tension predictions based on assumption that $D_{s1}(2536)$ $D_{s2}^*(2573)$...
Using a sample of about 10 billion $J/\psi$ events with the BESIII detector, we search for weak decays $J/\psi \to \bar{D}^0\pi^0 + c.c.$, \bar{D}^0\eta \bar{D}^0\rho^0 D^-\pi^+ and D^-\rho^+ c.c.$. Since no significant signal is observed, set upper limits branching fractions these to be $\mathcal{B}(J/\psi c.c.) < 4.7 \times 10^{-7}$, 6.8 5.2 7.0 10^{-8}$, 6.0 10^{-7}$ at 90\% confidence level.
Evidence for the singly Cabibbo suppressed decay $\Lambda_c^+\to p\pi^0$ is reported first time with a statistical significance of $3.7\sigma$ based on 6.0 $\mathrm{fb}^{-1}$ $e^+e^-$ collision data collected at center-of-mass energies between 4.600 and 4.843 GeV BESIII detector BEPCII collider. The absolute branching fraction measured to be $(1.56^{+0.72}_{-0.58}\pm0.20)\times 10^{-4}$. Combining n\pi^+$, $(6.6\pm1.3)\times10^{-4}$, ratio fractions n\pi^+$ calculated $3.2^{+2.2}_{-1.2}$. As...
Using $e^+e^-$ annihilation data corresponding to an integrated luminosity of 2.93 $\rm fb^{-1}$ taken at the center-of-mass energy $\sqrt{s}=3.773$~GeV with BESIII detector, a joint amplitude analysis is performed on decays $D^0\to\pi^+\pi^-\pi^+\pi^-$ and $D^0\to\pi^+\pi^-\pi^0\pi^0$(non-$\eta$). The fit fractions individual components are obtained, large interferences among dominant $D^{0}\to a_{1}(1260)\pi$, $D^{0}\to\pi(1300)\pi$, $D^{0}\to\rho(770)\rho(770)$ $D^{0}\to2(\pi\pi)_{S}$...
Based on 4.5 fb$^{-1}$ of $e^{+}e^{-}$ collision data accumulated at center-of-mass energies between $4599.53$ MeV and $4698.82$ with the BESIII detector, decay $\Lambda_{c}^{+}\to nK_{S}^{0}\pi^+\pi^0$ is observed for first time a significance $9.2\sigma$. The branching fraction measured to be $(0.85\pm0.13\pm0.03)\%$, where uncertainty statistical second systematic, which differs from theoretical prediction based isospin by 4.4$\sigma$. This indicates that there may resonant contributions...
The absolute branching fraction of the decay $\Lambda_{c}(2625)^{+}\to \Lambda^{+}_{c}\pi^+\pi^-$ is measured for first time to be $(50.7 \pm 5.0_{\rm{stat.}} 4.9_{\rm{syst.}} )\%$ with 368.48 pb$^{-1}$ $e^+e^-$ collision data collected by BESIII detector at center-of-mass energies $\sqrt{s} = 4.918$ and $4.950$ GeV. This result lower than naive prediction 67\%, obtained from isospin symmetry, more $2\sigma$, thereby indicating that novel mechanism referred as \textit{threshold effect},...
Using $2.93~\mathrm{fb}^{-1}$ of $e^+e^-$ collision data collected with the BESIII detector at center-of-mass energy 3.773 GeV, we investigate semileptonic decays $D^+\to \pi^+\pi^- \ell^+\nu_\ell$ ($\ell=e$ and $\mu$). The f_0(500)\mu^+\nu_\mu$ decay is observed for first time. By analyzing simultaneously differential rates f_0(500) \mu^+\nu_\mu$ e^+\nu_e$ in different $\ell^+\nu_\ell$ four-momentum transfer intervals, product relevant hadronic form factor $f^{f_0}_{+}(0)$ magnitude $c\to...
With a sample of $(10087\pm44)\times10^{6}$ $J/\psi$ events accumulated with the BESIII detector, we analyze decays $\eta'\rightarrow\pi^+\pi^-l^+l^-(l=e,$ $\mu)$ via process $J/\psi\rightarrow\gamma\eta'$. The branching fractions are measured to be $\mathcal{B}(\eta'\rightarrow\pi^+\pi^-e^+e^-)=(2.45\pm0.02(\rm{stat.})\pm0.08(\rm{syst.})) \times10^{-3}$ and $\mathcal{B}(\eta'\rightarrow\pi^+\pi^-\mu^+\mu^-)=(2.16\pm0.12(\rm{stat.})\pm0.06(\rm{syst.}))\times10^{-5}$, ratio is...
Using $(2.712\pm0.014)\times 10^9$ $\psi(3686)$ events collected by the BESIII detector operating at BEPCII collider, we report first observation of $\psi(3686)\to 3\phi$ decay with a significance larger than 10$\sigma$. The branching fraction this is determined to be $(1.46\pm0.05\pm0.17)\times10^{-5}$, where uncertainty statistical and second systematic. No significant structure observed in $\phi\phi$ invariant mass spectra.
Based on $(2712.4\pm14.1)\times10^{6}$ $\psi(3686)$ events collected with the BESIII detector, we study decays $h_{c}\to3(\pi^{+}\pi^{-})\pi^{0}$, $h_{c}\to2(\pi^{+}\pi^{-})\omega$, $h_{c}\to2(\pi^{+}\pi^{-})\pi^{0}\eta$, $h_{c}\to2(\pi^{+}\pi^{-})\eta$, and $h_{c}\to p\bar{p}$ via $\psi(3686)\to\pi^{0}h_{c}$. The decay channel $h_{c}\to3(\pi^{+}\pi^{-})\pi^{0}$ is observed for first time, its branching fraction determined to be $\left( {9.28\pm 1.14 \pm 0.77} \right) \times {10^{ - 3}}$,...
By analyzing $e^+e^-$ annihilation data corresponding to an integrated luminosity of 2.93 $\rm fb^{-1}$ collected at a center-of-mass energy 3.773 GeV with the \text{BESIII} detector, first observation semileptonic decays $D^0\rightarrow K_S^0\pi^-\pi^0 e^+ \nu_e$ and $D^+\rightarrow K_S^0\pi^+\pi^- is reported. With dominant hadronic contribution from $K_1(1270)$, branching fractions are measured be $\mathcal{B}(D^0\rightarrow {K}_1(1270)^-(\to...
Six $C$-even states, denoted as $X$, with quantum numbers $J^{PC}=0^{-+}$, $1^{\pm+}$, or $2^{\pm+}$, are searched for via the $e^+e^-\to\gamma D_{s}^{\pm}D_{s}^{*\mp}$ process using $(1667.39\pm8.84)~\mathrm{pb}^{-1}$ of $e^+e^-$ collision data collected BESIII detector operating at BEPCII storage ring center-of-mass energy $\sqrt{s}=(4681.92\pm0.30)~\mathrm{MeV}$. No statistically significant signal is observed in mass range from $4.08$ to $4.32~\mathrm{GeV}/c^{2}$. The upper limits...
Based on $(2.712\pm0.014)\times10^9$ $\psi(3686)$ events collected by the BESIII collaboration, evidence of hadronic decay $h_c\to K_S^0K^+\pi^-+c.c.$ is found with a significance $4.3\sigma$ in $\psi(3686)\to\pi^0 h_c$ process. The branching fraction K_S^0 K^+\pi^- +c.c.$ measured to be $(7.3\pm0.8\pm1.8)\times10^{-4}$, where first and second uncertainties are statistical systematic, respectively. Combining exclusive width $\eta_c\to K\bar{K}\pi$, our result indicates inconsistencies both...
We search for the hadronic decay $\eta_c(2S)\to 2(\pi^+\pi^-)$ in $\psi(3686)\to\gamma\eta_c(2S)$ radiative using $(27.12\pm 0.14)\times 10^8$ $\psi(3686)$ events collected by BESIII detector at BEPCII collider. No significant signal is found, and upper limit of $\mathcal{B}[\psi(3686)\to\gamma\eta_c(2S)]\mathcal{B}[\eta_c(2S)\to 2(\pi^+\pi^-)]$ determined to be $0.78\times 10^{-6}$ 90\% confidence level. Using $\psi(3686)\to\gamma\chi_{cJ}$ transitions, we also measure branching fractions...
The Born cross sections for the process $e^{+}e^{-}\to \omega\eta^{\prime}$ are measured at 22 center-of-mass energies from 2.000 to 3.080 GeV using data collected with BESIII detector BEPCII collider. A resonant structure is observed a statistical significance of 9.6$\sigma$. Breit-Wigner fit determines its mass be $M_R=(2153\pm30\pm31)~{\rm{MeV}}/c^{2}$ and width $\Gamma_{R}=(167\pm77\pm7)~\rm{MeV}$, where first uncertainties second systematic.
We report the first amplitude analysis of decays $D^{0} \to \pi^{+} \pi^{-} \eta$ and $D^{+} \rightarrow \pi^{+}\pi^{0}\eta$ using a data sample taken with BESIII detector at center-of-mass energy 3.773 GeV, corresponding to an integrated luminosity 7.9 ${\rm fb}^{-1}$. The contribution from process $D^{0(+)} a_{0}(980)^{+} \pi^{-(0)}$ is significantly larger than a_{0}(980)^{-(0)} \pi^{+}$ contribution. ratios $\mathcal{B}(D^{0} a_{0}(980)^{+}\pi^{-})/\mathcal{B}(D^{0}...
Using 9.0 $\rm fb^{-1}$ of $e^+e^-$ collision data collected at center-of-mass energies from 4.178 to 4.278 GeV with the BESIII detector BEPCII collider, we perform first search for radiative transition $\chi_{c1}(3872)\to\gamma \psi_2(3823)$. No \psi_2(3823)$ signal is observed. The upper limit on ratio branching fractions $\mathcal{B}(\chi_{c1}(3872)\to\gamma \psi_2(3823), \psi_2(3823)\to\gamma\chi_{c1})/\mathcal{B}(\chi_{c1}(3872)\to\pi^+\pi^- J/\psi)$ set as 0.075 90\% confidence level....
Based on 368.5 pb$^{-1}$ of $e^+e^-$ collision data collected at center-of-mass energies 4.914 and 4.946 GeV by the BESIII detector, $e^+e^- \to \phi\chi_{c1}(3872)$ process is searched for first time. No significant signal observed upper limits 90\% confidence level product Born cross section $\sigma(e^+e^- \phi\chi_{c1}(3872))$ branching fraction $\mathcal{B}[\chi_{c1}(3872)\to\pi^+\pi^- J/\psi]$ are set to be 0.85 0.96 pb, respectively. These measurements provide useful information...
By analyzing a data sample of $e^+e^-$ collisions with center-of-mass energy $\sqrt{s}=3.773$ GeV, corresponding to an integrated luminosity $7.9~\rm {fb}^{-1}$ collected the BESIII detector operating at BEPCII collider, we study semileptonic decays $D^{0(+)}$ mesons into axial-vector meson $b_1(1235)$ via decay $b_1(1235)\to \omega\pi$. The $D^0\to b_1(1235)^-e^{+}\nu_{e}$ is observed significance 5.2$\sigma$ after considering systematic uncertainty, while evidence for $D^+\to b_1(1235)^0...
Using $(2712.4 \pm 14.3) \times 10^6~\psi$(3686) events collected with the BESIII detector operating at BEPCII collider, we search for hadronic transition $h_c \to \pi^+\pi^-J/\psi$ via $\psi(3686)\to \pi^0 h_c$. No significant signal is observed. We set most stringent upper limits to date on branching fractions $\mathcal{B}(\psi(3686)\to h_c)\times\mathcal{B}(h_c\to\pi^+\pi^-J/\psi)$ and $\mathcal{B}(h_c \pi^+\pi^-J/\psi)$ 90$\%$ confidence level, which are determined be $6.7\times 10^{-7}$...
The processes $e^{+}e^{-} \to \Delta^{++}\bar{\Delta}^{--}$ and $e^{+}e^{-}\to \Delta^{++} \bar{p} \pi^{-} + c.c.$ are studied for the first time with $179~{\rm pb}^{-1}$ of $e^{+}e^{-}$ annihilation data collected BESIII detector at center-of-mass energies from $2.3094$ GeV to $2.6464$ GeV. No significant signal process is observed upper limit Born cross section estimated each energy point. For c.c.$, a near 2.6454 corresponding reported.