A. Hafner

activity

20082023

most citedEvidence for an excess of B -> D(*) Tau Nu decays

857 citations · 11.3k across the 195 of their papers we have counts for

collaborators

Showing 2017 · hep-exShow all

19 papers · 2 filters

hep-ex2017★ 46 cited

Precision Study of $η^{'} \to γ π^{+} π^{-}$ Decay Dynamics

BESIII Collaboration, M. Ablikim, M. N. Achasov +431

Using a low background data sample of $9.7 \times 1 0^{5}$ $J ψ \to γ η^{'}$ , $η^{'} \to γ π^{+} π^{-}$ events, which are 2 orders of magnitude larger than those from the pr…

hep-ex2017★ 5 cited

Observation of $e^{+} e^{-} \to η Y (2175)$ 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 $e^{+} e^{-} \to η Y (2175)$ at center-of-mass energies between 3.7 and 4.6 $\sim$ GeV with a statistical significance larger than $10 σ$ usin…

hep-ex2017★ 7 cited

Measurement of branching fractions for $ψ (3686) \to γ η^{'}, γ η$ and $γ π^{0}$

M. Ablikim, M. N. Achasov, X. C. Ai +420

Using a data sample of $448 \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector operating at the BEPCII storage ring, the decays $ψ (3686) \to γ η$ and $ψ(3686)\ri…

hep-ex2017★ 2 cited

Measurement of the $D^{*} (2010)^{+} - D^{+}$ mass difference

The BaBar Collaboration

We measure the mass difference, $Δ m_{+}$ , between the $D^{*} (2010)^{+}$ and the $D^{+}$ using the decay chain $D^{*} (2010)^{+} \to D^{+} π^{0}$ with $D^{+} \to K^{-} π^{+} π^{+}$ . The data were recorded w…

hep-ex2017★ 10 cited

Search for $ψ (3686) \to γ η_{c} (η (1405)) \to γ π^{+} π^{-} π^{0}$

BESIII collaboration, M. Ablikim, M. N. Achasov +438

Using a sample of $448.1 \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector, a search for the isospin violating decay $η_{c} \to π^{+} π^{-} π^{0}$ via $ψ (3686) \to γ η_{c}$ …

hep-ex2017★ 103 cited

Determination of spin and parity of the $Z_{c} (3900)$

BESIII Collaboration, M. Ablikim, M. N. Achasov +424

The spin and parity of the $Z_{c} (3900)^{\pm}$ state are determined to be $J^{P} = 1^{+}$ with a statistical significance larger than $7 σ$ over other quantum numbers in a partial wave analys…

hep-ex2017★ 6 cited

Measurement of cross sections of the interactions $e^{+} e^{-} \to ϕϕ ω$ and $e^{+} e^{-} \to ϕϕϕ$ at center-of-mass energies from 4.008 to 4.600 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +426

Using data samples collected with the BESIII detector at the BEPCII collider at six center-of-mass energies between 4.008 and 4.600 GeV, we observe the processes $e^+e^-\rightarrow…

hep-ex2017★ 13 cited

Measurement of the integrated luminosity and the center-of-mass energy of the data taken by BESIII at $s = 2.125$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +322

To study the nature of the state $Y (2175)$ , a dedicated data set of $e^{+} e^{-}$ collision data was collected at the center-of-mass energy of 2.125 GeV with the BESIII detector at the…

hep-ex2017★ 52 cited

Dark Photon Search in the Mass Range Between 1.5 and 3.4 GeV/ $c^{2}$

M. Ablikim, M. N. Achasov, X. C. Ai +414

Using a data set of 2.93 fb $^{- 1}$ taken at a center-of-mass energy $s$ = 3.773 GeV with the BESIII detector at the BEPCII collider, we perform a search for an extra U(1) ga…

hep-ex2017★ 12 cited

Measurement of the $e^{+} e^{-} \to K_{S}^{0} K^{\pm} π^{\mp} π^{0}$ and $K_{S}^{0} K^{\pm} π^{\mp} η$ cross sections using initial-state radiation

The BABAR Collaboration

The processes $e^{+} e^{-} \to K_{S}^{0} K^{\pm} π^{\mp} π^{0}$ and $e^{+} e^{-} \to K_{S}^{0} K^{\pm} π^{\mp} η$ are studied over a continuum of energies from threshold…

hep-ex2017★ 54 cited

Analysis of $D^{+} \to K ˉ^{0} e^{+} ν_{e}$ and $D^{+} \to π^{0} e^{+} ν_{e}$ Semileptonic Decays

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

Using 2.93~fb $^{- 1}$ of data taken at 3.773 GeV with the BESIII detector operated at the BEPCII collider, we study the semileptonic decays $D^{+} \to K ˉ^{0} e^{+} ν_{e}$ and $D^+ \to π^0…

hep-ex2017★ 11 cited

Dalitz plot analyses of $J / ψ \to π^{+} π^{-} π^{0}$ , $J / ψ \to K^{+} K^{-} π^{0}$ , and $J / ψ \to K_{S}^{0} K^{\pm} π^{\mp}$ produced via $e^{+} e^{-}$ annihilation with initial-state radiation

The BaBar Collaboration

We study the processes $e^{+} e^{-} \to γ_{ISR} J / ψ$ where $J / ψ \to π^{+} π^{-} π^{0}$ , $J / ψ \to K^{+} K^{-} π^{0}$ , and $J / ψ \to K_{S}^{0} K^{\pm} π^{\mp}$ using a data sample of 519 $f b^{- 1}$ rec…

hep-ex2017★ 105 cited

Measurement of $e^{+} e^{-} \to π^{+} π^{-} ψ (3686)$ from 4.008 to 4.600 $\sim$ GeV and observation of a charged structure in the $π^{\pm} ψ (3686)$ mass spectrum

M. Ablikim, M. N. Achasov, S. Ahmed +424

We study the process $e^{+} e^{-} \to π^{+} π^{-} ψ (3686)$ using 5.1 $f b^{- 1}$ of data collected at 16 center-of-mass energy ( $s$ ) points from 4.008 to 4.600 $\sim$ GeV b…

hep-ex2017★ 15 cited

Search for the Radiative Leptonic Decay $D^{+} \to γ e^{+} ν_{e}$

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

Using an electron-positron collision data sample of 2.93 fb $^{- 1}$ collected at a center-of-mass energy of $s = 3.773$ GeV with the BESIII detector, we present the first searc…

hep-ex2017★ 58 cited

Luminosity measurements for the R scan experiment at BESIII

M. Ablikim, M. N. Achasov, S. Ahmed +423

By analyzing the large-angle Bhabha scattering events $e^{+} e^{-}$ $\to$ ( $γ$ ) $e^{+} e^{-}$ and diphoton events $e^{+} e^{-}$ $\to$ $γ γ$ for the data sets collected at center-of-mass…

hep-ex2017★ 34 cited

Evidence for the singly-Cabibbo-suppressed decay $Λ_{c}^{+} \to p η$ and search for $Λ_{c}^{+} \to p π^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +421

We study the singly-Cabibbo-suppressed decays $Λ_{c}^{+} \to p η$ and $Λ_{c}^{+} \to p π^{0}$ using $Λ_{c}^{+} Λ_{c}^{+}$ pairs produced by $e^{+} e^{-}$ collisions at a center-of-mass energy…

hep-ex2017★ 338 cited

Search for Invisible Decays of a Dark Photon Produced in e+e- Collisions at BaBar

J. P. Lees

We search for single-photon events in 53 fb^-1 of e+e- collision data collected with the BaBar detector at the PEP-II B-factory. We look for events with a single high-energy photon…

hep-ex2017★ 20 cited

Cross section measurements of $e^{+} e^{-} \to p p ˉ π^{0}$ at center-of-mass energies between 4.008 and 4.600 GeV

M. Ablikim, M. N. Achasov, S. Ahmed +429

Based on $e^{+} e^{-}$ annihilation data samples collected with the BESIII detector at the BEPCII collider at 13 center of mass energies from 4.008 to 4.600 GeV, measurements of the Bor…

hep-ex2017★ 13 cited

Measurement of higher-order multipole amplitudes in $ψ (3686) \to γ χ_{c 1, 2}$ with $χ_{c 1, 2} \to γ J / ψ$ and search for the transition $η_{c} (2 S) \to γ J / ψ$

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

Using 106~million $ψ (3686)$ events collected with the BESIII detector, we measure multipole amplitudes for the decay $ψ (3686) \to γ χ_{c 1, 2} \to γ γ J / ψ$ beyond the dominant elect…

Precision Study of η′→γπ+π− Decay Dynamics

Observation of e+e−→ηY(2175) at center-of-mass energies above 3.7∼GeV

Measurement of branching fractions for ψ(3686)→γη′,γη and γπ0

Measurement of the D∗(2010)+−D+ mass difference

Search for ψ(3686)→γηc​(η(1405))→γπ+π−π0

Determination of spin and parity of the Zc​(3900)

Measurement of cross sections of the interactions e+e−→ϕϕω and e+e−→ϕϕϕ at center-of-mass energies from 4.008 to 4.600 GeV

Measurement of the integrated luminosity and the center-of-mass energy of the data taken by BESIII at s​=2.125 GeV

Dark Photon Search in the Mass Range Between 1.5 and 3.4 GeV/c2

Measurement of the e+e−→KS0​K±π∓π0 and KS0​K±π∓η cross sections using initial-state radiation

Analysis of D+→Kˉ0e+νe​ and D+→π0e+νe​ Semileptonic Decays

Dalitz plot analyses of J/ψ→π+π−π0, J/ψ→K+K−π0, and J/ψ→KS0​K±π∓ produced via e+e− annihilation with initial-state radiation

Measurement of e+e−→π+π−ψ(3686) from 4.008 to 4.600∼GeV and observation of a charged structure in the π±ψ(3686) mass spectrum

Search for the Radiative Leptonic Decay D+→γe+νe​