Measurement of the $D\to K^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ and $D\to K^{-}\ddot{I}{€}^{+}\ddot{I}{€}^0$ coherence factors and average strong-phase differences in quantum-correlated $D\bar{D}$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +505

The decays $D\to K^{-}\ddot{I}{€}^{+}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ and $D\to K^{-}\ddot{I}{€}^{+}\ddot{I}{€}^0$ are studied in a sample of quantum-correlated $D\bar{D}$ pairs produced through the process $e^+e^- \to ψ(3770) \to D\bar…

Tests of light-lepton universality in angular asymmetries of $B^0\to D^{\ast -}\ell \hat{I}½$ decays

Belle II Collaboration, I. Adachi, K. Adamczyk +416

We present the first comprehensive tests of light-lepton universality in the angular distributions of semileptonic $B^0$-meson decays to charged spin-1 charmed mesons. We measure f…

Search for the semileptonic decays $D_s^{+}\to K_1(1270{)}^0{e}^{+}\hat{I}{½}_e$ and $D_s^{+}\to b_1(1235{)}^0{e}^{+}\hat{I}{½}_e$

BESIII Collaboration, M. Ablikim, M. N. Achasov +611

By analyzing 7.33\,fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at center-of-mass energies between 4.128 and 4.226 GeV with the BESIII detector, we search for the semileptonic de…

Measurement of the Integrated Luminosities of Cross-section Scan Data Samples Around the $\ddot{I}ˆ(3770)$ Mass Region

M. Ablikim, M. N. Achasov, S. Ahmed +460

To investigate the nature of the $\ddot{I}ˆ(3770)$ resonance and to measure the cross section for $e^{+}{e}^{-}\to D\bar{D}$, a cross-section scan data sample, distributed among 41 center-of-m…

Observation of $\ddot{I}ˆ(3686)\to K^{-}\hat{I}›(1520)\bar{\hat{I}}{ž}^{+}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Based on $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected at the BESIII detector operating at the BEPCII collider, we present the first observation of the decay $ψ(3686)…

Cross section measurements of $e^{+}{e}^{-}\to \ddot{I}‰\ddot{I}{‡}_{c0}$ from $\sqrt{s}=$4.178 to 4.278 GeV

M. Ablikim, M. N. Achasov, P. Adlarson +474

The cross section of the process $e^{+}{e}^{-}\to \ddot{I}‰\ddot{I}{‡}_{c0}$ is measured at center-of-mass energies from $\sqrt{s}=$ 4.178 to 4.278 GeV using a data sample of 7 fb${}^{-1}$ colle…

Measurement of the Cross Section for $e^{+}{e}^{-}\to$ hadrons at Energies from 2.2324 to 3.6710 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +557

Based on electron-positron collision data collected with the BESIII detector operating at the Beijing Electron Positron Collider II storage rings, the value of $R\equivσ(e^{+}e^{-…

Determination of Spin-parity Quantum Numbers for the Narrow Structure Near the $p\bar{\hat{I}}›$ Threshold in $e^{+}{e}^{-}\to p{K}^{-}\bar{\hat{I}}›+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +593

A narrow structure in the $p\bar{\hat{I}}›$ system near the mass threshold, named as $X(2085)$, is observed in the process $e^{+}{e}^{-}\to p{K}^{-}\bar{\hat{I}}›$ with a statistical significance greater…

Observation of $D^{+}\to K_S^0{a}_0(980{)}^{+}$ in the amplitude analysis of $D^{+}\to K_S^0\ddot{I}{€}^{+}\hat{I}\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +615

We perform for the first time an amplitude analysis of the decay $D^{+}\to K_S^0\ddot{I}{€}^{+}\hat{I}\cdot$ and report the observation of the decay $D^{+}\to K_S^0{a}_0(980{)}^{+}$ using 2.93 fb…

Search for lepton-flavor violating decays $D^0\to X^0{e}^{\pm }\hat{I}{¼}^{\mp }$

BaBar Collaboration, J. P. Lees, V. Poireau +238

We present a search for seven lepton-flavor-violating neutral charm decays of the type $D^0\to X^0{e}^{\pm }\hat{I}{¼}^{\mp }$, where $X^0$ represents a $\ddot{I}{€}^0$, $K^{0}_{\rm S…

First measurements of the branching fractions of $J/\ddot{I}ˆ\to \hat{I}{ž}^0\bar{\hat{I}}›K_S^0+c.c.$, $J/\ddot{I}ˆ\to \hat{I}{ž}^0\bar{\hat{I}}{\pounds }^0{K}_S^0+c.c.$, and $J/\ddot{I}ˆ\to \hat{I}{ž}^0\bar{\hat{I}}{\pounds }^{-}{K}^{+}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +686

By analyzing $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected with the BESIII detector at the BEPCII, the decays $J/\ddot{I}ˆ\to \hat{I}{ž}^0\bar{\hat{I}}›K_S^0+c.c.$, $J/\ddot{I}ˆ\to \hat{I}{ž}^0\bar{\hat{I}}{\pounds }^0{K}_S^0+c.c.$…

Observation of the $J/\ddot{I}ˆ$ and $\ddot{I}ˆ(3686)$ decays into $\hat{I}\cdot \hat{I}{\pounds }^{+}\bar{\hat{I}}{\pounds }^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +572

The decays $J/\ddot{I}ˆ\to \hat{I}\cdot \hat{I}{\pounds }^{+}\bar{\hat{I}}\pounds {}^{-}$ and $\ddot{I}ˆ(3686)\to \hat{I}\cdot \hat{I}{\pounds }^{+}\bar{\hat{I}}\pounds {}^{-}$ are observed for the first time, using $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ and $(448.1 \pm 2.9)\times 10…

First Observation of a Three-Resonance Structure in $e^{+}{e}^{-}\to$Nonopen Charm Hadrons

BESIII Collaboration, M. Ablikim, M. N. Achasov +619

We report the measurement of the inclusive cross sections for $e^{+}{e}^{-}$$\to$nOCH (where nOCH denotes non-open charm hadrons) with improved precision at center-of-mass (c.m.)…

Precise measurement of the form factors in $D^0\to K^{\ast }(892{)}^{-}\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ and test of lepton universality with $D^0\to K^{\ast }(892{)}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

We report a study of the semileptonic decay $D^0\to {\bar{K}}^0\ddot{I}{€}^{-}\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ based on a sample of $7.9{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ annihilation data collected at a center…

Search for rare decay $J/\ddot{I}ˆ\to \ddot{I}•e^{+}{e}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +462

Using a data sample of $448.1\times 10^6$ $\ddot{I}ˆ(3686)$ events collected at $\sqrt{s}=$ 3.686 GeV with the BESIII detector at the BEPCII, we search for the rare decay $J/ψ\to ϕe^+ e^…

Determination of strong-phase parameters in $D\to K_{S,L}^0\ddot{I}{€}^{+}\ddot{I}{€}^{-}$

M. Ablikim, M. N. Achasov, P. Adlarson +483

We report the most precise measurements to date of the strong-phase parameters between $D^0$ and ${\bar{D}}^0$ decays to $K_{S,L}^0\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ using a sample of 2.93 fb${}^{-1}$ of $e^+e…

Observation of Three Resonant Structures in the Cross Section of $e^{+}{e}^{-}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{h}_c$

BESIII Collaboration, M. Ablikim, M. N. Achasov +688

Using $e^{+}{e}^{-}$ collision data collected with the BESIII detector operating at the Beijing Electron Positron Collider, the cross section of $e^{+}{e}^{-}\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{h}_c$ is measured at 5…

Measurement of the $D\to K^{-}\ddot{I}{€}^{+}$ strong phase difference in $\ddot{I}ˆ(3770)\to D^0\overline{D}{}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +381

We study $D^0\overline{D}{}^0$ pairs produced in $e^{+}{e}^{-}$ collisions at $\sqrt{s}=3.773$ GeV using a data sample of 2.92 fb${}^{-1}$ collected with the BESIII detector. We measure th…

Measurement of higher-order multipole amplitudes in $\ddot{I}ˆ(3686)\to {\hat{I}}^3\ddot{I}{‡}_{c1,2}$ with $\ddot{I}{‡}_{c1,2}\to {\hat{I}}^{3}J/\ddot{I}ˆ$ and search for the transition $\hat{I}{\cdot }_c(2S)\to {\hat{I}}^{3}J/\ddot{I}ˆ$

M. Ablikim, M. N. Achasov, X. C. Ai +424

Using 106~million $\ddot{I}ˆ(3686)$ events collected with the BESIII detector, we measure multipole amplitudes for the decay $\ddot{I}ˆ(3686)\to {\hat{I}}^3\ddot{I}{‡}_{c1,2}\to {\hat{I}}^3{\hat{I}}^{3}J/\ddot{I}ˆ$ beyond the dominan…

Measurement of $CP$ asymmetries in $B^0\to \hat{I}{\cdot }^{\prime }{K}_s^0$ decays at Belle II

Belle II Collaboration, I. Adachi, L. Aggarwal +399

We describe a measurement of charge-parity ($CP$) violation asymmetries in $B^0\to \hat{I}{\cdot }^{\prime }{K}_S^0$ decays using Belle II data. We consider $\hat{I}{\cdot }^{\prime }\to \hat{I}\cdot (\to {\hat{I}}^3{\hat{I}}^3)\ddot{I}{€}^{+}\ddot{I}{€}^{-}$ and $η'\toρ(\toπ^…

Experimental study of the reaction $\hat{I}{ž}^{0}n\to \hat{I}›\hat{I}›X$ using $\hat{I}{ž}^0$-nucleus scattering

BESIII Collaboration, M. Ablikim, M. N. Achasov +703

Using $(10087\pm 44)\times 10^6$$J/\ddot{I}ˆ$ events collected with the BESIII detector operating at the BEPCII storage ring in $2009$, $2012$, $2018$, and $2019$, we perform a search for…

Evidence for $Z_c^{\pm }$ decays into the $\ddot{I}{}^{\pm }\hat{I}{\cdot }_c$ final state

M. Ablikim, M. N. Achasov, S. Ahmed +458

We study $e^{+}{e}^{-}$ collisions with a $\ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0\hat{I}{\cdot }_c$ final state using data samples collected with the BESIII detector at center-of-mass energies $\sqrt{s}=4.226$, $4…

Search for the lepton number violation decay $\ddot{I}•\to \ddot{I}{€}^{+}\ddot{I}{€}^{+}{e}^{-}{e}^{-}$ via $J/\ddot{I}ˆ\to \ddot{I}•\hat{I}\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +596

Using $(1.0087\pm 0.0044)\times 10^{10}$ $J/\ddot{I}ˆ$ events collected by the BESIII detector at the BEPCII collider, we search for the lepton number violation decay $ϕ\to π^+ π^+ e^- e…

Observation of $e^{+}{e}^{-}\to \hat{I}\cdot Y(2175)$ at center-of-mass energies above 3.7$\sim$GeV

M. Ablikim, M. N. Achasov, S. Ahmed +426

The state $Y(2175)$ is observed in the process $e^{+}{e}^{-}\to \hat{I}\cdot Y(2175)$ at center-of-mass energies between 3.7 and 4.6$\sim$GeV with a statistical significance larger than $10\ddot{I}ƒ$ us…

A new measurement of the neutron detection efficiency for the NaI Crystal Ball detector

M. Martemianov, V. Kulikov, B. T. Demissie +68

We report on a measurement of the neutron detection efficiency in NaI crystals in the Crystal Ball detector obtained from a study of single p0 photoproduction on deuterium using th…

Search for hyperon $\hat{I}”S=\hat{I}”Q$ violating decay $\hat{I}{ž}^0\to \hat{I}{\pounds }^{-}{e}^{+}\hat{I}{½}_e$

BESIII Collaboration, M. Ablikim, M. N. Achasov +566

Using a data sample of $(1.0087\pm 0.0044)\times 10^{10}$ $J/\ddot{I}ˆ$ decay events collected with the BESIII detector at the center-of-mass energy of $\sqrt{s}=3.097$ GeV, we present a se…

Measurements of branching fractions and direct CP asymmetries in $B^0\to K^{+}\ddot{I}{€}^{-}$, $B^{+}\to K_{\mathrm{S}}^0\ddot{I}{€}^{+}$ and $B^0\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}$ using 2019 and 2020 data

Belle II Collaboration, F. Abudinén, I. Adachi +549

We report updated measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries (${\mathcal{A}}_{\mathrm{CP}}$) for charmless $B$ decays at Belle II, which opera…

Issues and Opportunities in Exotic Hadrons

R. A. Briceno, T. D. Cohen, S. Coito +22

The last few years have been witness to a proliferation of new results concerning heavy exotic hadrons. Experimentally, many new signals have been discovered that could be pointing…

Search for $\bar{\hat{I}}›$-$\hat{I}›$ oscillations in the decay $J/\ddot{I}ˆ\to p{K}^{-}\bar{\hat{I}}›+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +454

We report the first search for $\bar{\hat{I}}›$--$\hat{I}›$ oscillations in the decay $J/\ddot{I}ˆ\to p{K}^{-}\bar{\hat{I}}›+c.c.$ by analyzing $1.31\times 10^9$ $J/\ddot{I}ˆ$ events accumulated with the BESIII detect…

Observation of the Anomalous Shape of $X(1840)$ in $J/\ddot{I}ˆ\to {\hat{I}}^{3}3(\ddot{I}{€}^{+}\ddot{I}{€}^{-})$ Indicating a Second Resonance Near $p\bar{p}$ Threshold

BESIII Collaboration, M. Ablikim, M. N. Achasov +615

Using a sample of $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events, which is about 45 times larger than that was previously analyzed, a further investigation on the $J/ψ\rightarrow γ3(π^…

Determination of the number of $J/\ddot{I}ˆ$ events with inclusive $J/\ddot{I}ˆ$ decays

M. Ablikim, M. N. Achasov, X. C. Ai +405

A measurement of the number of $J/\ddot{I}ˆ$ events collected with the BESIII detector in 2009 and 2012 is performed using inclusive decays of the $J/\ddot{I}ˆ$ . The number of $J/\ddot{I}ˆ$ events tak…

Search for C-parity violation in $J/\ddot{I}ˆ\to {\hat{I}}^3{\hat{I}}^3$ and ${\hat{I}}^3\ddot{I}•$

BESIII Collaboration, M. Ablikim, M. N. Achasov +391

Using $1.06\times 10^8$ $\ddot{I}ˆ(3686)$ events recorded in $e^{+}{e}^{-}$ collisions at $\sqrt{s}=$ 3.686 GeV with the BESIII at the BEPCII collider, we present searches for C-parity viola…

Search for baryon and lepton number violating decays $D^{+}\to \bar{\hat{I}}›(\bar{\hat{I}}{\pounds }^0)e^{+}$ and $D^{+}\to \hat{I}›(\hat{I}{\pounds }^0)e^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +480

Using a 2.93 fb${}^{-1}$ data sample of electron-positron collisions taken with the BESIII detector at a center-of-mass energy of 3.773 GeV, which corresponds to $(8296\pm31\pm64)\ti…

Precision Measurement of the Decay $\hat{I}{\pounds }^{+}\to p{\hat{I}}^3$ in the Process $J/\ddot{I}ˆ\to \hat{I}{\pounds }^{+}\bar{\hat{I}}{\pounds }^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +593

Using $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected with the BESIII detector, the radiative hyperon decay $\hat{I}\pounds \to p{\hat{I}}^3$ is studied at an electron-positron collider exp…

Partial wave analysis of $J/\ddot{I}ˆ\to {\hat{I}}^3\hat{I}\cdot \hat{I}\cdot$

M. Ablikim, M. N. Achasov, O. Albayrak +358

Based on a sample of $2.25\times 10^8$ $J/\ddot{I}ˆ$ events collected with the BESIII detector at BEPCII, a full partial wave analysis on $J/\ddot{I}ˆ\to {\hat{I}}^3\hat{I}\cdot \hat{I}\cdot$ was performed using the relativ…

Measurement of the branching fraction and decay asymmetry of $\hat{I}›\to n{\hat{I}}^3$

BESIII Collaboration, M. Ablikim, M. N. Achasov +565

The radiative hyperon decay $\hat{I}›\to n{\hat{I}}^3$ is studied using $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected with the BESIII detector operating at BEPCII. The absolute branching frac…

Observation of $B\to D^{(\ast )}{K}^{-}{K}_S^0$ decays using the 2019-2022 Belle II data sample

Belle II Collaboration, F. Abudinén, I. Adachi +575

We present a measurement of the branching fractions of four $B^{0,-}\to D^{(\ast )+,0}{K}^{-}{K}_S^0$ decay modes. The measurement is based on data from SuperKEKB electron-positron colli…

Observation of $a_0(1710{)}^{+}\to K_S^0{K}^{+}$ in study of the $D_s^{+}\to K_S^0{K}^{+}\ddot{I}{€}^0$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +551

Using $e^{+}{e}^{-}$ annihilation data corresponding to an integrated luminosity of 6.32 fb${}^{-1}$ collected at center-of-mass energies between 4.178 GeV and 4.226 GeV with the BESIII de…

Measurement of the Energy-Dependent Electromagnetic Form Factors of a Charmed Baryon

BESIII Collaboration, M. Ablikim, M. N. Achasov +609

We study the process $e^{+}{e}^{-}\to \hat{I}{›}_c^{+}\bar{\hat{I}}{›}_c^{-}$ at twelve center-of-mass energies from $4.6119$ to $4.9509\mathrm{GeV}$ using data samples collected by the BESIII detec…

Measurements of the branching fractions for $B\to K^{\ast }{\hat{I}}^3$ decays at Belle II

F. Abudinén, I. Adachi, R. Adak +565

This paper reports a study of $B\to K^{\ast }{\hat{I}}^3$ decays using $62.8\pm 0.6$ fb${}^{-1}$ of data collected during 2019--2020 by the Belle II experiment at the SuperKEKB $e^{+}{e}^{-}$ asym…

Measurement of the center-of-mass energies at BESIII via the di-muon process

M. Ablikim, M. N. Achasov, X. C. Ai +407

From 2011 to 2014, the BESIII experiment collected about 5 fb${}^{-1}$ data at center-of-mass energies around 4 GeV for the studies of the charmonium-like and higher excited charmoni…

Measurement of the Born cross section for $e^{+}{e}^{-}\to p{K}^{-}{K}^{-}\bar{\hat{I}}{ž}^{+}$ at $\sqrt{s}=$ 3.5-4.9 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +695

Using $e^{+}{e}^{-}$ collision data corresponding to a total integrated luminosity of 20 ${\mathrm{fb}}^{-1}$ collected with the BESIII detector at the BEPCII collider, we present a measurem…

Observation of the electromagnetic radiative decays of the \boldmath{$\hat{I}›(1520)$} and \boldmath{$\hat{I}›(1670)$} to \boldmath{${\hat{I}}^3\hat{I}{\pounds }^0$}

BESIII Collaboration, M. Ablikim, M. N. Achasov +689

Using $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events collected with the BESIII detector, we report the first observation of the electromagnetic radiative decays of the $\hat{I}›(1520)$ and $Λ(…

Measurement of the absolute branching fraction of the singly Cabibbo suppressed decay $\hat{I}{›}_c^{+}\to p\hat{I}{\cdot }^{\prime }$

BESIII Collaboration, M. Ablikim, M. N. Achasov +569

The singly Cabibbo suppressed decay $\hat{I}{›}_c^{+}\to p\hat{I}{\cdot }^{\prime }$ is measured using 4.5 ${\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at center-of-mass energies between 4.…

Cross section measurements of the $e^{+}{e}^{-}\to D^{\ast +}{D}^{\ast -}$ and $e^{+}{e}^{-}\to D^{\ast +}{D}^{-}$ processes at center-of-mass energies from 4.085 to 4.600 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +549

The Born cross sections of the $e^{+}{e}^{-}\to D^{\ast +}{D}^{\ast -}$ and $e^{+}{e}^{-}\to D^{\ast +}{D}^{-}$ processes are measured using $e^{+}{e}^{-}$ collision data collected with the BESIII experiment at cen…

Study of $\hat{I}{›}_c^{+}\to \hat{I}›\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ and Test of Lepton Flavor Universality with $\hat{I}{›}_c^{+}\to \hat{I}›{\ell }^{+}\hat{I}{½}_{\ell }$ Decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +614

The measurement of the Cabibbo-favored semileptonic decay $\hat{I}{›}_c^{+}\to \hat{I}›\hat{I}{¼}^{+}\hat{I}{½}_{\hat{I}}¼$ is reported using $4.5{\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ annihilation data collected at center…

Measurement of the CKM angle ${\hat{I}}^3$ in $B^{\pm }\to D(\to K_{\mathrm{S}}^0{h}^{\prime +}{h}^{\prime -})h^{\pm }$ decays with a novel approach

The BESIII, LHCb Collaborations, : +1903

A measurement of the CKM angle ${\hat{I}}^3$ and related strong-phase parameters is performed using a novel, model-independent approach in ${B^{\pm}\rightarrow D(\rightarrow K^{0}_{\rm S} h…

Study of $\ddot{I}•\to K\bar{K}$ in the amplitude analysis of $D^{+}\to K_S^0{K}_L^0\ddot{I}{€}^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +772

We present the first amplitude analysis and branching fraction measurement of $D^{+}\to K_S^0{K}_L^0\ddot{I}{€}^{+}$ decay. The analysis uses a dataset corresponding to an in…

Measurements of Normalized Differential Cross Sections of Inclusive $\hat{I}\cdot$ Production in $e^{+}{e}^{-}$ Annihilation at Energy from 2.0000 to 3.6710 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +650

Using data samples collected with the BESIII detector operating at the BEPCII storage ring, the cross section of the inclusive process $e^{+}{e}^{-}\to \hat{I}\cdot +X$, normalized by the tot…

Evidence for $e^{+}{e}^{-}\to {\hat{I}}^3\ddot{I}{‡}_{c1,2}$ at center-of-mass energies from 4.009 to 4.360 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +405

Using data samples collected at center-of-mass energies of $\sqrt{s}$ = 4.009, 4.230, 4.260, and 4.360 GeV with the BESIII detector operating at the BEPCII collider, we perform a s…

Precision Measurements of $\mathcal{B}[\ddot{I}ˆ(3686)\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}J/\ddot{I}ˆ]$ and $\mathcal{B}[J/\ddot{I}ˆ\to l^{+}{l}^{-}]$

BESIII Collaboration, M. Ablikim, M. N. Achasov +356

Based on $(106.41\pm 0.86)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector at the BEPCII collider, the branching fractions of $\ddot{I}ˆ(3686)\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}J/\ddot{I}ˆ$, $J/Ï…

Study of $\hat{I}\cdot (1475)$ and $X(1835)$ in radiative $J/\ddot{I}ˆ$ decays to ${\hat{I}}^3\ddot{I}•$

BESIII Collaboration, M. Ablikim, M. N. Achasov +428

The decay $J/\ddot{I}ˆ\to {\hat{I}}^3{\hat{I}}^3\ddot{I}•$ is studied using a sample of $1.31\times 10^9$ $J/\ddot{I}ˆ$ events collected with the BESIII detector. Two structures around 1475 MeV/c${}^2$ and 1835…

Observation of $e^{+}{e}^{-}\to D_s^{+}\overline{D}{}^{(\ast )0}{K}^{-}$ and study of the $P$-wave $D_s$ mesons

BESIII Collaboration, M. Ablikim, M. N. Achasov +453

Studies of $e^{+}{e}^{-}\to D_s^{+}\overline{D}{}^{(\ast )0}{K}^{-}$ and the $P$-wave charmed-strange mesons are performed based on an $e^{+}{e}^{-}$ collision data sample corresponding to an integrat…

Study of $\hat{I}\cdot \to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{l}^{+}{l}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +639

Using a sample of $(10087\pm 44)\times 10^6$ $J/\ddot{I}ˆ$ events accumulated with the BESIII detector, we analyze the decays $\hat{I}\cdot \to \ddot{I}{€}^{+}\ddot{I}{€}^{-}{l}^{+}{l}^{-}$ ($l=e$ or $\hat{I}¼$) via the process…

Search for lepton number violating decays of $D_s^{+}\to h^{-}{h}^0{e}^{+}{e}^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +655

Based on 7.33 fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data collected by the BESIII detector operating at the BEPCII collider at center-of-mass energies from 4.128 to 4.226 GeV, a search fo…

Search for baryon and lepton number violating decays of $\hat{I}{ž}^0$ hyperons

BESIII Collaboration, M. Ablikim, M. N. Achasov +602

Using $(1.0087\pm 0.0044)\times 10^{10}$ $J/\ddot{I}ˆ$ events collected by the BESIII detector at the BEPCII collider, we report the first search for the baryon and lepton number violating…

Measurements of the absolute branching fractions for $D_s^{+}\to \hat{I}\cdot e^{+}\hat{I}{½}_e$ and $D_s^{+}\to \hat{I}{\cdot }^{\prime }{e}^{+}\hat{I}{½}_e$

M. Ablikim, M. N. Achasov, X. C. Ai +412

By analyzing 482 pb${}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at $\sqrt{s}=4.009$ GeV with the BESIII detector at the BEPCII collider, we measure the absolute branching fractions…

Measurements of Double-Polarized Compton Scattering Asymmetries and Extraction of the Proton Spin Polarizabilities

P. P. Martel, R. Miskimen, P. Aguar-Bartolome +76

The spin polarizabilities of the nucleon describe how the spin of the nucleon responds to an incident polarized photon. The most model-independent way to measure the nucleon spin p…

Search for CP violation in $e^{+}{e}^{-}\to \ddot{I}ˆ(3770)\to D^0{\bar{D}}^0$ via $D->K_S^0\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +701

Utilizing data sample of electron-positron collisions recorded with the BESIII detector at the center of mass energy of 3.773 GeV, corresponding to an integrated luminosity of 20.2…

Measurement of Born Cross Sections for $e^{+}{e}^{-}\to K^{+}\hat{I}{ž}^0\bar{\hat{I}}{\pounds }^{-}$ at $\sqrt{s}=3.51-4.95$ GeV and Observation of $\ddot{I}ˆ(3770)\to K^{+}\hat{I}{ž}^0\bar{\hat{I}}{\pounds }^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +771

Using 44.55 fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data collected by the BESIII detector at the BEPCII collider, we report the first measurement of the Born cross sections for the $e^+e^-…

Observation of Time Reversal Violation in the B0 Meson System

The BABAR Collaboration, J. P. Lees, V. Poireau +364

Although CP violation in the B meson system has been well established by the B factories, there has been no direct observation of time reversal violation. The decays of entangled n…

Physics in the tau-charm Region at BESIII

H. B. Li, W. Gradl, X. R. Lyu +31

The Beijing Spectrometer (BESIII) collaboration uses $e^{+}{e}^{-}$ collisions in the tau-charm energy region to study a broad spectrum of topics. These include studies of light mesons a…

Strong and electromagnetic amplitudes, direct $CP$ and isospin asymmetries in the decays $J/\ddot{I}ˆ\to K_S^0{K}^{+}\ddot{I}{€}^{-}+c.c.$

BESIII Collaboration, M. Ablikim, M. N. Achasov +766

Using $e^{+}{e}^{-}$ annihilation data collected at 26 center-of-mass energy points between 3000.00 and $3119.88\text{MeV}$ with the BESIII detector, corresponding to a total integrated…

Improved measurements of branching fractions for $\hat{I}{\cdot }_c\to \ddot{I}•\ddot{I}•$ and $\ddot{I}‰\ddot{I}•$

M. Ablikim, M. N. Achasov, X. C. Ai +419

Using $(223.7\pm 1.4)\times 10^6$ J/$\ddot{I}ˆ$ events accumulated with the BESIII detector, we study $\hat{I}{\cdot }_c$ decays to $\ddot{I}•\ddot{I}•$ and $\ddot{I}‰\ddot{I}•$ final states. The branching fraction of $η_c\toϕϕ…

Measurement of e+e- --> D Dbar Cross Sections at the psi(3770) Resonance

BESIII Collaboration, M. Ablikim, M. N. Achasov +452

We report new measurements of the cross sections for the production of D Dbar final states at the psi(3770) resonance. Our data sample consists of an integrated luminosity of 2.93/…

Study of the decay ψ(3686) \to Σ^{0}\barΣ^{0}ϕ

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Using $(27.12\pm 0.14)\times 10^8$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector operating at the BEPCII collider, the decay $\ddot{I}ˆ(3686)\to \hat{I}{\pounds }^0\bar{\hat{I}}{\pounds }^0\ddot{I}•$ is observed fo…

First Measurements of $\ddot{I}{‡}_{cJ}\to \hat{I}{\pounds }^{-}\bar{\hat{I}}{\pounds }^{+}(J=0,1,2)$ Decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +484

We measured the branching fractions of the decays $\ddot{I}{‡}_{cJ}\to \hat{I}{\pounds }^{-}\bar{\hat{I}}{\pounds }^{+}$ for the first time using the final states $n\bar{n}\ddot{I}{€}^{+}\ddot{I}{€}^{-}$. The data sample exploited here is $…

Search for the decay $\hat{I}{\cdot }^{\prime }\to {\hat{I}}^3{\hat{I}}^3\hat{I}\cdot$

M. Ablikim, M. N. Achasov, P. Adlarson +479

Using a data sample of $1.31\times 10^{9}J/\ddot{I}ˆ$ events collected with the BESIII detector, a search for $\hat{I}{\cdot }^{\prime }\to {\hat{I}}^3{\hat{I}}^3\hat{I}\cdot$ via $J/\ddot{I}ˆ\to {\hat{I}}^3\hat{I}{\cdot }^{\prime }$ is performed for the first time. No signif…

Measurement of the cross sections for $e^{+}{e}^{-}\to \hat{I}\cdot \ddot{I}{€}^{+}\ddot{I}{€}^{-}$ at center-of-mass energies between 2.00 and 3.08 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +616

Using data samples collected at center-of-mass energies between 2.000 and 3.080 GeV with the BESIII detector operating at the BEPCII collider, a partial-wave analysis is performed…

Measurements of branching fractions and CP-violating charge asymmetries in multibody charmless $B$ decays reconstructed in 2019-2020 Belle II data

Belle II collaboration, F. Abudinén, I. Adachi +549

We report on measurements of branching fractions ($\mathcal{B}$) and CP-violating charge asymmetries (${\mathcal{A}}_{\mathrm{CP}}$) of multibody charmless $B$ decays reconstructed by the…

Observation of $\ddot{I}ˆ(3686)\to \hat{I}ž(1530{)}^{-}\bar{\hat{I}}ž(1530{)}^{+}$ and $\hat{I}ž(1530{)}^{-}\bar{\hat{I}}{ž}^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +475

Using 448.1 $\times$ $10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector at BEPCII, we employ a single-baryon tagging technique to make the first observation of $ψ(3686)…

New high-statistics measurement of the $\ddot{I}{€}^0\to e^{+}{e}^{-}{\hat{I}}^3$ Dalitz decay at the Mainz Microtron

S. Prakhov, L. Heijkenskjöld, S. Abt +69

The Dalitz decay $\ddot{I}{€}^0\to e^{+}{e}^{-}{\hat{I}}^3$ has been measured with the highest statistical accuracy obtained so far in the ${\hat{I}}^{3}p\to \ddot{I}{€}^{0}p$ reaction with the A2 tagged-photon facility at t…

Precise Measurements of Branching Fractions for $D_s^{+}$ Meson Decays to Two Pseudoscalar Mesons

M. Ablikim, M. N. Achasov, P. Adlarson +483

We measure the branching fractions for seven $D_s^{+}$ two-body decays to pseudo-scalar mesons, by analyzing data collected at $\sqrt{s}=4.178\sim 4.226$ GeV with the BESIII detec…

Measurement of absolute branching fraction of the inclusive decay $\hat{I}{›}_c^{+}\to \hat{I}›+X$

BESIII Collaboration, M. Ablikim, M. N. Achasov +446

Based on an $e^{+}{e}^{-}$ collision data sample corresponding to an integrated luminosity of 567${\mathrm{pb}}^{-1}$ taken at the center-of-mass energy of $\sqrt{s}=4.6$ GeV with the BESI…

Evaluation of the E2/M1 ratio in the $N\to \hat{I}”(1232)$ transition from the ${\vec{\hat{I}}}^3\vec{p}\to p\ddot{I}{€}^0$ reaction

E. Mornacchi, P. Pedroni, F. Afzal +59

A new data set for the helicity-dependent differential cross section of the single-meson photoproduction reaction ${\hat{I}}^{3}p\to p\ddot{I}{€}^0$ was obtained for the photon energy interval 150…

Measurement of $B^{+}\to \ddot{I}{„}^{+}\hat{I}{½}_{\ddot{I}}„$ branching fraction with a hadronic tagging method at Belle II

Belle II Collaboration, I. Adachi, K. Adamczyk +341

We present a measurement of the branching fraction of $B^{+}\to \ddot{I}{„}^{+}\hat{I}{½}_{\ddot{I}}„$ decays using $(387\pm 6)\times 10^6$ $\hat{I}\yen (4S)$ collected between 2019 and 2022 with the Belle II detector at t…

Search for rare or forbidden decays of the $D^0$ meson

J. P. Lees, V. Poireau, V. Tisserand +234

We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type $D^0\to h^{\prime -}{h}^{-}{\ell }^{\prime +}{\ell }^{+}$…

Measurements of Weak Decay Asymmetries of $\hat{I}{›}_c^{+}\to p{K}_S^0$, $\hat{I}›\ddot{I}{€}^{+}$, $\hat{I}{\pounds }^{+}\ddot{I}{€}^0$, and $\hat{I}{\pounds }^0\ddot{I}{€}^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +476

Using $e^{+}{e}^{-}\to \hat{I}{›}_c^{+}\bar{\hat{I}}{›}_c^{-}$ production from a 567 pb${}^{-1}$ data sample collected by BESIII at 4.6 GeV, a full angular analysis is carried out simultaneously on the four deca…

Dalitz Plot Analysis of the Decay $\ddot{I}‰\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0$

M. Ablikim, M. N. Achasov, S. Ahmed +461

Using a low-background sample of $2.6\times 10^5$ $J/\ddot{I}ˆ\to \ddot{I}‰\hat{I}\cdot (\ddot{I}‰\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0,\hat{I}\cdot \to {\hat{I}}^3{\hat{I}}^3)$ events, about 5 times larger statistics than previous exp…

Observation of the Singly Cabibbo-Suppressed Decay $D^{+}\to \ddot{I}‰\ddot{I}{€}^{+}$ and Evidence for $D^0\to \ddot{I}‰\ddot{I}{€}^0$

BESIII Collaboration, M. Ablikim, M. N. Achasov +414

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 searches for the singly Cabibbo-suppressed decays $D^{…

First observation of the decay $\ddot{I}{‡}_{cJ}\to \hat{I}{\pounds }^{+}\bar{p}{K}_S^0+c.c.(J=0,1,2)$

M. Ablikim, M. N. Achasov, P. Adlarson +478

Using E1 radiative transitions $\ddot{I}ˆ(3686)\to {\hat{I}}^3\ddot{I}{‡}_{cJ}$ from a sample of $(448.1\pm 2.9)\times 10^6$ $\ddot{I}ˆ(3686)$ events collected with the BESIII detector, the decays $χ_{cJ}\to…

Search for $\hat{I}{ž}^{0}p$, $\hat{I}{\text{c◯}}^{-}p$, and $\hat{I}{\text{c◯}}^{-}n$ dibaryons in $\hat{I}\yen (1S)$ and $\hat{I}\yen (2S)$ decays at Belle

Belle, Belle II Collaborations, : +367

We search for $\hat{I}{ž}^{0}p$, $\hat{I}{\text{c◯}}^{-}p$, and $\hat{I}{\text{c◯}}^{-}n$ dibaryon states in $\hat{I}\yen (1S)$ and $\hat{I}\yen (2S)$ decays, probing mass regions near the corresponding baryon-pair thresholds. Multistrange baryon…

Test of lepton flavor universality with measurements of $R(D^{+})$ and $R(D^{\ast +})$ using semileptonic $B$ tagging at the Belle II experiment

Belle II Collaboration, I. Adachi, K. Adamczyk +450

We report measurements of the ratios of branching fractions ${\cal R}(D^{(*)+}) = \frac{{\cal B}(\overline{B}{}^0 \to D^{(*)+} \,τ^- \, \overlineν_τ)}{{\cal B}(\overline{B}{}^0…

Measurement of the $e^{+}{e}^{-}\to K_S^0{K}_L^0\ddot{I}{€}^0$ cross sections from $\sqrt{s}=$ 2.000 to 3.080 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +615

Based on $e^{+}{e}^{-}$ collision data collected at center-of-mass energies from 2.000 to 3.080 GeV by the BESIII detector at the BEPCII collider, a partial wave analysis is performe…

Confirmation of a charged charmoniumlike state $Z_c(3885{)}^{\mp }$ in $e^{+}{e}^{-}\to \ddot{I}{€}^{\pm }(D{\bar{D}}^{\ast }{)}^{\mp }$ with double $D$ tag

BESIII Collaboration, M. Ablikim, M. N. Achasov +400

We present a study of the process $e^{+}{e}^{-}\to \ddot{I}{€}^{\pm }(D{\bar{D}}^{\ast }{)}^{\mp }$ using data samples of 1092~pb${}^{-1}$ at $\sqrt{s}=4.23$~GeV and 826~pb${}^{-1}$ at $\sqrt{s}=4.26$~GeV collect…

Cross sections measurement of $e^{+}{e}^{-}\to \hat{I}ž(1530{)}^0\bar{\hat{I}}{ž}^0+c.c.$ and search for $\ddot{I}ˆ(3770)\to \hat{I}ž(1530{)}^0\bar{\hat{I}}{ž}^0+c.c.$

BESIII Colaboration, :, M. Ablikim +681

Using $e^{+}{e}^{-}$ collision data collected with the BESIII detector corresponding to an integrated luminosity of 44.2 fb${}^{-1}$, we measure the Born cross sections for the process $e^…

Measurement of the form factors in the decay $D^{+}\to \ddot{I}‰e^{+}\hat{I}{½}_e$ and search for the decay $D^{+}\to \ddot{I}•e^{+}\hat{I}{½}_e$

M. Ablikim, M. N. Achasov, X. C. Ai +398

Using 2.92 fb${}^{-1}$ of electron-positron annihilation data collected at a center-of-mass energy of $\sqrt{s}=3.773$ GeV with the BESIII detector, we present an improved measureme…

Measurements of the branching fractions of the $P$-wave charmonium spin-singlet state $h_c{(}^1{P}_1)\to h^{+}{h}^{-}\ddot{I}{€}^0/\hat{I}\cdot$

BESIII Collaboration, M. Ablikim, M. N. Achasov +649

Based on $(2712.4\pm 14.3)\times 10^6$ $\ddot{I}ˆ(3686)$ events, we investigate four hadronic decay modes of the $P$-wave charmonium spin-singlet state $h_c{(}^1{P}_1)\to h^{+}{h}^{-}\ddot{I}{€}^0/\hat{I}\cdot$ (…

Exclusive $B^0\to \ddot{I}{€}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ Decays with Hadronic Full Event Interpretation Tagging in 34.6 fb${}^{-1}$ of Belle II Data

Belle II Collaboration, F. Abudinén, I. Adachi +541

We present the results of the re-discovery of the decay $B^0\to \ddot{I}{€}^{-}{\ell }^{+}\hat{I}{½}_{\ell }$ in 34.6 fb${}^{-1}$ of Belle II data using hadronic $B$-tagging via the Full Event Interpretatio…

Measurement of $e^{+}{e}^{-}\to \hat{I}\cdot J/\ddot{I}ˆ$ Cross Section from $\sqrt{s}=$ 3.808 GeV to 4.951 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +619

Using data samples with an integrated luminosity of 22.42 fb${}^{-1}$ collected by the BESIII detector operating at the BEPCII storage ring, we measure the cross sections of the $e^{…

Study of $e^{+}{e}^{-}\to p\bar{p}$ in the vicinity of $\ddot{I}ˆ(3770)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +376

Using 2917 ${\mathrm{pb}}^{-1}$ of data accumulated at 3.773~$\mathrm{GeV}$, 44.5~${\mathrm{pb}}^{-1}$ of data accumulated at 3.65~$\mathrm{GeV}$ and data accumulated during a $\ddot{I}ˆ(3770)$ line-shape sc…

Measurement of the branching fraction of $\hat{I}\cdot \to \hat{I}{¼}^{+}\hat{I}{¼}^{-}$ and search for $\hat{I}\cdot \to e^{+}{e}^{-}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +702

We analyze the decay of $\hat{I}\cdot \to {\ell }^{+}{\ell }^{-}(\ell =e,\hat{I}¼)$ via $J/\ddot{I}ˆ\to {\hat{I}}^3\hat{I}{\cdot }^{\prime }$ and $\hat{I}{\cdot }^{\prime }\to \ddot{I}{€}^{+}\ddot{I}{€}^{-}\hat{I}\cdot$, based on (10087 $\pm$ 44) $\times$ 10${}^6$ $J/\ddot{I}ˆ$ event…

Observation of $J/\ddot{I}ˆ\to p\bar{p}{a}_0(980)$ at BESIII

M. Ablikim, M. N. Achasov, X. C. Ai +389

Using $2.25\times 10^8$ $J/\ddot{I}ˆ$ events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process $J/ψ\rightarrow p\bar{p}a_{0}(980)…

Measurement of the branching fraction of the doubly Cabibbo-suppressed decay $D^0\to K^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0$ and search for $D^0\to K^{+}\ddot{I}{€}^{-}\ddot{I}{€}^0\ddot{I}{€}^0$