H. Cai

activity

20212026

most citedSearch for magnetic monopole pair production in ultraperipheral Pb+Pb collisions at

s_{_{NN}} = 5.36

TeV with the ATLAS detector at the LHC

13 citations · 43 across the 25 of their papers we have counts for

collaborators

25 papers

cs.LG2026

Lightning OPD: Efficient Post-Training for Large Reasoning Models with Offline On-Policy Distillation

Yecheng Wu, Song Han, Han Cai +1

On-policy distillation (OPD) is an effective post-training paradigm for large language models but requires a live teacher server throughout training, resulting in substantial infra…

hep-ex2026

First evidence for $D_{s}^{+} \to f_{1} (1420) e^{+} ν_{e}$ and search for $D_{s}^{+} \to f_{1} (1285) e^{+} ν_{e}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +706

Using $e^{+} e^{-}$ collision data corresponding to an integrated luminosity of 7.33~ $f b^{- 1}$ recorded by the BESIII detector at center-of-mass energies between 4.128 and 4.226~$…

hep-ex2026

Search for the reaction channel $e^{+} e^{-} \to η η J / ψ$ and the isospin partner of the $Z_{c} (3900)$ at center-of-mass energies $s = 4.226 - 4.950$ GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +693

We search for the reaction channel $e^{+} e^{-} \to η η J / ψ$ in a data sample with center-of-mass energies from 4.226 to 4.950 GeV that was collected by the BESIII detector operating a…

hep-ex2026

First Measurement of the Absolute Branching Fraction of $η_{c} \to γ γ$

BESIII Collaboration, M. Ablikim, M. N. Achasov +691

We apply a tag-and-probe method to precisely measure the absolute branching fraction of the decay $η_{c} \to γ γ$ with the BESIII experiment at BEPCII. Starting with a large initial s…

hep-ex2026

Amplitude analysis and branching fraction measurement of $J / ψ \to Λ Σ ˉ^{0} η + c.c$

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

Based on a sample of $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector, a partial-wave analysis of $J / ψ \to Λ Σ ˉ^{0} η + c.c$ is performed for th…

hep-ex2026

Cross section measurement of $e^{+} e^{-} \to π^{0} π^{0} ψ (3686)$ from $s =$ 4.008 GeV to 4.951 GeV

BESIII Collaboration, M. Ablikim, M. N. Achasov +682

Using data samples with a total integrated luminosity of $22.1 f b^{- 1}$ at center-of-mass energies between 4.008 and 4.951~GeV collected with the BESIII detector, the cross sec…

hep-ex2026

Measurements of the branching fractions of $χ_{c J} \to 2 K^{+} 2 K^{-} ω$ and $ϕ K^{+} K^{-} ω$ decays

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

Using a data sample of $(2712.4 \pm 14.3) \times 1 0^{6}$ $ψ (3686)$ events collected with the BESIII detector operating at the BEPCII collider, we report the first observation of th…

hep-ex2026

Observation of $C P$ violation in $B^{0} \to J / ψ ρ (770)^{0}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1172

The time-dependent $C P$ asymmetry in $B^{0} \to J / ψ ρ (770)^{0}$ decays is measured using proton-proton collision data corresponding to an integrated luminosity o…

hep-ex2026

Search for sub-GeV dark particles in $η \to π^{0} + invisible$ decay

BESIII Collaboration, M. Ablikim, M. N. Achasov +685

Using (10087 $\pm$ 44) $\times$ 10 $^{6}$ $J / ψ$ events collected with the BESIII detector at the BEPCII collider at the center-of-mass energy of $s = 3.097 GeV$ , we report the…

hep-ex2026

Search for lepton-number-violating $B^{-} \to D^{(*) +} μ^{-} μ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1188

A search is performed for lepton-number-violating $B^{-} \to D^{(*) +} μ^{-} μ^{-}$ decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy…

hep-ex2026

Evidence for the rare decay $B^{+} \to Λ ˉ p μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1186

A search for the rare decay $B^{+} \to Λ ˉ p μ^{+} μ^{-}$ is performed using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of $\sqrt{s}=…

hep-ex2026

First evidence of the $B_{s}^{0} \to K^{-} π^{+} γ$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1173

The first search for the $B_{s}^{0} \to K^{-} π^{+} γ$ decay in the range $796 < m (K^{-} π^{+}) < 1800 MeV/ c^{2}$ is performed using data from proton-proton collisions collected by the L…

hep-ex2026

First Observation of $D^{0 (+)} \to K ˉ ω e^{+} ν_{e}$ and Determination of the Branching Fraction of $K ˉ_{1} (1270) \to K ˉ ω$

BESIII Collaboration, M. Ablikim, M. N. Achasov +685

Using 20.3~fb $^{- 1}$ of $e^{+} e^{-}$ annihilation data collected at a center-of-mass energy of 3.773~GeV with the BESIII detector, we report the first observation of the semileptonic d…

hep-ex2025

Search for $K_{S (L)}^{0} \to π^{+} π^{-} μ^{+} μ^{-}$ decays at LHCb

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1183

A search for $K_{S (L)}^{0} \to π^{+} π^{-} μ^{+} μ^{-}$ decays is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass en…

hep-ex2025★ 1 cited

A model-independent measurement of the CKM angle $γ$ in the decays $B^{\pm} \to [K^{+} K^{-} π^{+} π^{-}]_{D} h^{\pm}$ and $B^{\pm} \to [π^{+} π^{-} π^{+} π^{-}]_{D} h^{\pm}$ ( $h = K, π$ )

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1164

A model-independent determination of the CKM angle $γ$ is presented, using the $B^{\pm} \to [K^{+} K^{-} π^{+} π^{-}]_{D} h^{\pm}$ and $B^{\pm} \to [π^{+} π^{-} π^{+} π^{-}]_{D} h^{\pm}$ decays, with $h = K, π$ . This meas…

hep-ex2025

Helicity amplitude and branching fraction measurement of $χ_{c J} \to Λ Λ ˉ$

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

Utilizing $2712.4 \pm 14.3$ million $ψ (3686)$ events accumulated by the BESIII experiment, we perform a partial wave analysis of $ψ (3686) \to γ χ_{c J} \to γ Λ Λ ˉ$ decay…

hep-ex2025★ 2 cited

Unraveling the structure of $Λ$ hyperons with polarized $Λ Λ ˉ$ pairs

The BESIII Collaboration

With data collected in a dedicated energy scan from 2.3864 up to 3.0800 GeV, the BESIII collaboration provides the first complete energy-dependent measurements of the $Λ$ electroma…

hep-ex2025★ 3 cited

Transforming jet flavour tagging at ATLAS

ATLAS Collaboration

Jet flavour tagging enables the identification of jets originating from heavy-flavour quarks in proton-proton collisions at the Large Hadron Collider, playing a critical role in it…

hep-ex2025★ 2 cited

A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps

ATLAS Collaboration

A calibration of the ATLAS flavour-tagging algorithms using a new calibration procedure based on optimal transportation maps is presented. Simultaneous, continuous corrections to t…

hep-ex2024★ 1 cited

Test of lepton flavour universality in $W$ -boson decays into electrons and $τ$ -leptons using $pp$ collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

A measurement of the ratio of the branching fractions, $R_{τ / e} = B (W \to τ ν) / B (W \to e ν)$ , is performed using a sample of $W$ bosons originating from top-quark decays to final s…

hep-ex2024

Reconstruction and identification of pairs of collimated $τ$ -leptons decaying hadronically using $s = 13$ TeV $pp$ collision data with the ATLAS detector

ATLAS Collaboration

This paper describes an algorithm for reconstructing and identifying a highly collimated hadronically decaying $τ$ -lepton pair with low transverse momentum. When two $τ$ -leptons ar…

hep-ex2024★ 4 cited

Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at $s = 13$ TeV with the ATLAS detector

ATLAS Collaboration

Inclusive cross-sections for top-quark pair production in association with charm quarks are measured with proton-proton collision data at a center-of-mass energy of 13 TeV correspo…

hep-ex2024★ 13 cited

Search for magnetic monopole pair production in ultraperipheral Pb+Pb collisions at $s_{_{NN}} = 5.36$ TeV with the ATLAS detector at the LHC

ATLAS Collaboration

This Letter presents a search for highly ionizing magnetic monopoles in 262 $μ$ b $^{- 1}$ of ultraperipheral Pb+Pb collision data at $s_{_{NN}} = 5.36$ TeV collected by t…

hep-ex2024★ 12 cited

Measurement of the associated production of a top-antitop-quark pair and a Higgs boson decaying into a $b b ˉ$ pair in $pp$ collisions at $s = 13$ TeV using the ATLAS detector at the LHC

ATLAS Collaboration

This paper reports the measurement of Higgs boson production in association with a $t t ˉ$ pair in the $H \to b b ˉ$ decay channel. The analysis uses 140 fb $^{- 1}$ o…

Lightning OPD: Efficient Post-Training for Large Reasoning Models with Offline On-Policy Distillation

First evidence for Ds+​→f1​(1420)e+νe​ and search for Ds+​→f1​(1285)e+νe​

Search for the reaction channel e+e−→ηηJ/ψ and the isospin partner of the Zc​(3900) at center-of-mass energies s​=4.226−4.950 GeV

First Measurement of the Absolute Branching Fraction of ηc​→γγ

Amplitude analysis and branching fraction measurement of J/ψ→ΛΣˉ0η+c.c

Cross section measurement of e+e−→π0π0ψ(3686) from s​= 4.008 GeV to 4.951 GeV

Measurements of the branching fractions of χcJ​→2K+2K−ω and ϕK+K−ω decays

Observation of CP violation in B0→J/ψρ(770)0 decays

Search for sub-GeV dark particles in η→π0+invisible decay

Search for lepton-number-violating B−→D(∗)+μ−μ− decays

Evidence for the rare decay B+→Λˉpμ+μ−

First evidence of the Bs0​→K−π+γ decay

First Observation of D0(+)→Kˉωe+νe​ and Determination of the Branching Fraction of Kˉ1​(1270)→Kˉω

Search for KS(L)0​→π+π−μ+μ− decays at LHCb

A model-independent measurement of the CKM angle γ in the decays B±→[K+K−π+π−]D​h± and B±→[π+π−π+π−]D​h± (h=K,π)

Helicity amplitude and branching fraction measurement of χcJ​→ΛΛˉ

Unraveling the structure of Λ hyperons with polarized ΛΛˉ pairs

Transforming jet flavour tagging at ATLAS

A continuous calibration of the ATLAS flavour-tagging classifiers via optimal transportation maps

Test of lepton flavour universality in W-boson decays into electrons and τ-leptons using pp collisions at s​=13 TeV with the ATLAS detector

Reconstruction and identification of pairs of collimated τ-leptons decaying hadronically using s​=13 TeV pp collision data with the ATLAS detector

Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at s​=13 TeV with the ATLAS detector

Search for magnetic monopole pair production in ultraperipheral Pb+Pb collisions at sNN​​​=5.36 TeV with the ATLAS detector at the LHC

Measurement of the associated production of a top-antitop-quark pair and a Higgs boson decaying into a bbˉ pair in pp collisions at s​=13 TeV using the ATLAS detector at the LHC

First evidence for $D_{s}^{+} \to f_{1} (1420) e^{+} ν_{e}$ and search for $D_{s}^{+} \to f_{1} (1285) e^{+} ν_{e}$

Search for the reaction channel $e^{+} e^{-} \to η η J / ψ$ and the isospin partner of the $Z_{c} (3900)$ at center-of-mass energies $s = 4.226 - 4.950$ GeV

First Measurement of the Absolute Branching Fraction of $η_{c} \to γ γ$

Amplitude analysis and branching fraction measurement of $J / ψ \to Λ Σ ˉ^{0} η + c.c$

Cross section measurement of $e^{+} e^{-} \to π^{0} π^{0} ψ (3686)$ from $s =$ 4.008 GeV to 4.951 GeV

Measurements of the branching fractions of $χ_{c J} \to 2 K^{+} 2 K^{-} ω$ and $ϕ K^{+} K^{-} ω$ decays

Observation of $C P$ violation in $B^{0} \to J / ψ ρ (770)^{0}$ decays

Search for sub-GeV dark particles in $η \to π^{0} + invisible$ decay

Search for lepton-number-violating $B^{-} \to D^{(*) +} μ^{-} μ^{-}$ decays

Evidence for the rare decay $B^{+} \to Λ ˉ p μ^{+} μ^{-}$

First evidence of the $B_{s}^{0} \to K^{-} π^{+} γ$ decay

First Observation of $D^{0 (+)} \to K ˉ ω e^{+} ν_{e}$ and Determination of the Branching Fraction of $K ˉ_{1} (1270) \to K ˉ ω$

Search for $K_{S (L)}^{0} \to π^{+} π^{-} μ^{+} μ^{-}$ decays at LHCb

A model-independent measurement of the CKM angle $γ$ in the decays $B^{\pm} \to [K^{+} K^{-} π^{+} π^{-}]_{D} h^{\pm}$ and $B^{\pm} \to [π^{+} π^{-} π^{+} π^{-}]_{D} h^{\pm}$ ( $h = K, π$ )

Helicity amplitude and branching fraction measurement of $χ_{c J} \to Λ Λ ˉ$

Unraveling the structure of $Λ$ hyperons with polarized $Λ Λ ˉ$ pairs

Test of lepton flavour universality in $W$ -boson decays into electrons and $τ$ -leptons using $pp$ collisions at $s = 13$ TeV with the ATLAS detector

Reconstruction and identification of pairs of collimated $τ$ -leptons decaying hadronically using $s = 13$ TeV $pp$ collision data with the ATLAS detector

Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at $s = 13$ TeV with the ATLAS detector

Search for magnetic monopole pair production in ultraperipheral Pb+Pb collisions at $s_{_{NN}} = 5.36$ TeV with the ATLAS detector at the LHC

Measurement of the associated production of a top-antitop-quark pair and a Higgs boson decaying into a $b b ˉ$ pair in $pp$ collisions at $s = 13$ TeV using the ATLAS detector at the LHC