Peking University

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2,693 papers · 1 filter

hep-ex2026

Probing Quantum Entanglement in $τ^{+} τ^{-}$ Pairs via the $π π$ Channel at STCF

Xiaokang Li, Chentao Bao, Hai Chen +2

Quantum entanglement and Bell-inequality violation in $τ^{+} τ^{-}$ pairs provide a sensitive probe of quantum correlations in high-energy interactions. We present a feasibility study o…

hep-ex2026

Measurement of the double Dalitz decay $η \to e^{+} e^{-} e^{+} e^{-}$

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

Using a data sample of $(1.0087 \pm 0.0044) \times 1 0^{10}$ $J / ψ$ events collected with the BESIII detector, we study the rare double Dalitz decay of $η \to e^{+} e^{-} e^{+} e^{-}$ …

hep-ex2026

Amplitude Analysis of the Isospin-Violating Decay $J / ψ \to γ η π^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +759

Using $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector, we perform the first amplitude analysis of the process $J / ψ \to γ η π^{0}$ . The decay is dominated b…

hep-ex2026

A search for microscopic black holes, string balls, and sphalerons in proton-proton collisions at $s$ = 13 TeV

CMS Collaboration

A search for microscopic black holes, string balls, and electroweak sphalerons using proton-proton collisions at $s$ = 13 TeV recorded with the CMS detector at the CERN LHC…

hep-ex2026

Evidence of ZZ $γ$ production and observation of $4 ℓ γ$ in proton-proton collisions at $s$ = 13 TeV

CMS Collaboration

Evidence of the production of two Z bosons and a photon in proton-proton collisions is reported for the first time in CMS. The analysis uses data collected by the CMS experiment be…

hep-ex2026

Search for Higgs boson pair production in the $b b ˉ WW$ decay channel with two leptons in the final state using proton-proton collision data at $s$ = 13.6 TeV

CMS Collaboration

A search for Higgs boson pair production is presented, targeting final states where one Higgs boson decays to a pair of bottom quarks and the other Higgs boson decays to two W boso…

hep-ex2026

Absolute scintillator light yield correction for SiPIN readout via Transfer Matrix Method and Geant4 optical simulation

Ge Ma, Zhiyang Yuan, Chencheng Feng +3

Precise measurement of the absolute light yield (LY) of scintillators has long been limited by systematic effects inherent in realistic readout geometries. Large-angle incidence, m…

hep-ex2026

Observation of the doubly charmed baryon $Ξ_{cc}^{+}$ with the LHCb Run 3 detector

LHCb collaboration, R. Aaij, M. Abdelfatah +1106

The first observation of the doubly charmed baryon $Ξ_{cc}^{+}$ is reported through its decay to the $Λ_{c}^{+} K^{-} π^{+}$ final state, with a statistical significance exceeding seven…

hep-ex2026

Observation of $Λ_{c}^{+} \to n π^{+} η$ and search for $Λ_{c}^{+} \to n a_{0} (980)^{+}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +719

By analysing 6.1 $fb^{- 1}$ of data collected at center-of-mass energies between $s = 4.600$ and 4.843 $GeV$ with the BESIII detector at the BEPCII collider, we obser…

hep-ex2026

$B$ -jet fragmentation with $B^{\pm} \to J / ψ K^{\pm}$ decays in $s = 13$ TeV $pp$ collisions at LHCb

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1166

The collinear and transverse-momentum-dependent jet fragmentation function and the radial profile for $B^{\pm}$ mesons in jets are measured. The $B^{\pm}$ mesons are reconstructed…

hep-ex2026

Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at $s$ = 13 TeV

CMS Collaboration

A search for Higgs boson (H) production at high transverse momentum ( $p_{T}$ ) in the WW decay channel is presented. The analysis uses proton-proton collisions at $s$ …

hep-ex2026

Measurement of the jet mass in hadronic decays of boosted W bosons at 13 TeV and extraction of the W boson mass

CMS Collaboration

The jet mass of W bosons decaying to a quark-antiquark pair is measured in W+jets events from proton-proton collisions at a center-of-mass energy of 13 TeV. The data used were coll…

hep-ex2026★ 1 cited

First measurement of time-dependent $C P$ violation in the flavor-changing neutral-current decay $B^{0} \to K_{S}^{0} μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1165

A flavor-tagged time-dependent analysis of $B^{0} \to K_{S}^{0} μ^{+} μ^{-}$ decays is performed across the full dimuon mass range excluding the $J / ψ$ and $ψ (2 S)$ resonance re…

hep-ex2026

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at $s$ = 13 TeV

CMS Collaboration

The existence of a new spin-zero particle with a mass below the electroweak scale is predicted by several theoretical models. Searches for resonant production of photon pairs at th…

hep-ex2026★ 2 cited

Precise Measurement of Matter-Antimatter Asymmetry with Entangled Hyperon Antihyperon Pairs

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

A search for $C P$ violation with an entangled system of $Ξ^{-} Ξ ˉ^{+}$ pairs is performed, using $(10, 087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII experiment. A nine…

hep-ex2026

Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at $s$ = 13 TeV

CMS Collaboration

A search for the pair production of heavy spin-1/2 or spin-3/2 resonances (t $^{*}$ ) in proton-proton collisions at $s$ = 13 TeV is presented. Data collected with the CMS detec…

hep-ex2026

Polarization measurement of $Λ_{c}^{+}$ and $Λ_{c}^{-}$ baryons in $p$ Ne collisions at $s_{N N} = 68.6$ GeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1174

The first measurement of the polarization of charm baryons by the LHCb experiment recorded in fixed-target mode is presented. The polarization of $Λ_{c}$ baryons is studied in collis…

hep-ex2026

Measurement of B meson production fraction ratios in proton-proton collisions at $s$ = 13 TeV using open-charm and charmonium decays

CMS Collaboration

Production fraction ratios of B $^{+}$ , B $^{0}$ , and B $_{s}^{0}$ mesons are measured in proton-proton collisions at $s$ = 13 TeV using a special data set recorded in 2018 wi…

hep-ex2026

Observation of $Λ ˉ p \to K^{+} π^{+} π^{-} π^{0}$ and $Λ ˉ p \to K^{+} π^{+} π^{-} 2 π^{0}$

BESIII Collaboration, M. Ablikim, M. N. Achasov +750

Using $(10087 \pm 44) \times 1 0^{6}$ $J / ψ$ events collected with the BESIII detector at a center-of-mass energy of $s = 3.097$ GeV, the antihyperon-nucleon annihilation processe…

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

Measurement and effective field theory interpretation of the photon-fusion production cross section of a pair of W bosons in proton-proton collisions at $s$ = 13 TeV

CMS Collaboration

This analysis presents an observation of the photon-fusion production of W boson pairs using the CMS detector at the LHC. The total cross section of the W $^{+}$ W $^{-}$ production in ph…

hep-ex2026

Observation of the decay $χ_{c 1} (3872) \to J / ψ μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1184

The first observation of the $χ_{c 1} (3872) \to J / ψ μ^{+} μ^{-}$ decay is reported using proton-proton collision data recorded with the LHCb detector correspo…

hep-ex2026

Measurement of the $Υ$ (1S), $Υ$ (2S), and $Υ$ (3S) differential cross sections in pp collisions at $s$ = 13.6 TeV

CMS Collaboration

The production cross sections of the $Υ$ (1S), $Υ$ (2S), and $Υ$ (3S) mesons are measured in proton-proton collisions at $s$ = 13.6 TeV, using a data sample collected in 2022 b…

Probing Quantum Entanglement in τ+τ− Pairs via the ππ Channel at STCF

Measurement of the double Dalitz decay η→e+e−e+e−

Amplitude Analysis of the Isospin-Violating Decay J/ψ→γηπ0

A search for microscopic black holes, string balls, and sphalerons in proton-proton collisions at s​ = 13 TeV

Evidence of ZZγ production and observation of 4ℓγ in proton-proton collisions at s​ = 13 TeV

Search for Higgs boson pair production in the bbˉWW decay channel with two leptons in the final state using proton-proton collision data at s​ = 13.6 TeV

Absolute scintillator light yield correction for SiPIN readout via Transfer Matrix Method and Geant4 optical simulation

Observation of the doubly charmed baryon Ξcc+​ with the LHCb Run 3 detector

Observation of Λc+​→nπ+η and search for Λc+​→na0​(980)+

B-jet fragmentation with B±→J/ψK± decays in s​=13 TeV pp collisions at LHCb

Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at s​ = 13 TeV

Measurement of the jet mass in hadronic decays of boosted W bosons at 13 TeV and extraction of the W boson mass

First measurement of time-dependent CP violation in the flavor-changing neutral-current decay B0→KS0​μ+μ−

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at s​ = 13 TeV

Precise Measurement of Matter-Antimatter Asymmetry with Entangled Hyperon Antihyperon Pairs

Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at s​ = 13 TeV

Polarization measurement of Λc+​ and Λc−​ baryons in pNe collisions at sNN​​=68.6 GeV

Measurement of B meson production fraction ratios in proton-proton collisions at s​ = 13 TeV using open-charm and charmonium decays

Observation of Λˉp→K+π+π−π0 and Λˉp→K+π+π−2π0

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

Measurement and effective field theory interpretation of the photon-fusion production cross section of a pair of W bosons in proton-proton collisions at s​ = 13 TeV

Observation of the decay χc1​(3872)→J/ψμ+μ−

Measurement of the Υ(1S), Υ(2S), and Υ(3S) differential cross sections in pp collisions at s​ = 13.6 TeV

Probing Quantum Entanglement in $τ^{+} τ^{-}$ Pairs via the $π π$ Channel at STCF

Measurement of the double Dalitz decay $η \to e^{+} e^{-} e^{+} e^{-}$

Amplitude Analysis of the Isospin-Violating Decay $J / ψ \to γ η π^{0}$

A search for microscopic black holes, string balls, and sphalerons in proton-proton collisions at $s$ = 13 TeV

Evidence of ZZ $γ$ production and observation of $4 ℓ γ$ in proton-proton collisions at $s$ = 13 TeV

Search for Higgs boson pair production in the $b b ˉ WW$ decay channel with two leptons in the final state using proton-proton collision data at $s$ = 13.6 TeV

Observation of the doubly charmed baryon $Ξ_{cc}^{+}$ with the LHCb Run 3 detector

Observation of $Λ_{c}^{+} \to n π^{+} η$ and search for $Λ_{c}^{+} \to n a_{0} (980)^{+}$

$B$ -jet fragmentation with $B^{\pm} \to J / ψ K^{\pm}$ decays in $s = 13$ TeV $pp$ collisions at LHCb

Search for Higgs boson production at high transverse momentum in the WW decay channel in proton-proton collisions at $s$ = 13 TeV

First measurement of time-dependent $C P$ violation in the flavor-changing neutral-current decay $B^{0} \to K_{S}^{0} μ^{+} μ^{-}$

Search for a narrow resonance with a mass between 10 and 70 GeV decaying to a pair of photons in proton-proton collisions at $s$ = 13 TeV

Search for pair production of heavy resonances in final states with a photon and large-radius jets in proton-proton collisions at $s$ = 13 TeV

Polarization measurement of $Λ_{c}^{+}$ and $Λ_{c}^{-}$ baryons in $p$ Ne collisions at $s_{N N} = 68.6$ GeV

Measurement of B meson production fraction ratios in proton-proton collisions at $s$ = 13 TeV using open-charm and charmonium decays

Observation of $Λ ˉ p \to K^{+} π^{+} π^{-} π^{0}$ and $Λ ˉ p \to K^{+} π^{+} π^{-} 2 π^{0}$

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

Measurement and effective field theory interpretation of the photon-fusion production cross section of a pair of W bosons in proton-proton collisions at $s$ = 13 TeV

Observation of the decay $χ_{c 1} (3872) \to J / ψ μ^{+} μ^{-}$

Measurement of the $Υ$ (1S), $Υ$ (2S), and $Υ$ (3S) differential cross sections in pp collisions at $s$ = 13.6 TeV