C. Agapopoulou

activity

20102026

most citedATLAS data quality operations and performance for 2015-2018 data-taking

337 citations · 3.4k across the 224 of their papers we have counts for

collaborators

230 papers

hep-ex2026

A converged architecture for processing 32 Tbps of physics data in real-time at the LHCb experiment

Roel Aaij, Christina Agapopoulou, Thomas Boettcher +27

The LHCb detector at the Large Hadron Collider has been upgraded to acquire an unprecedented 32 Tbps of particle-collision data to provide new insights in the High Energy Physics d…

hep-ex2026

Differential measurement of the branching fraction and $C P$ asymmetry of the decay $B^{\pm} \to π^{\pm} μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, M. Abdelfatah +1121

Differential measurements of the branching fraction and $C P$ asymmetry of the decay $B^{\pm} \to π^{\pm} μ^{+} μ^{-}$ are performed in intervals of the dimuon mass squared, $q^{2}$ , using pro…

hep-ex2026

Measurement of the $W$ -boson production cross-sections in $pp$ collisions at $s$ = 13 TeV in the forward region

LHCb collaboration, R. Aaij, M. Abdelfatah +1114

A precision measurement of the $W$ -boson production cross-section is performed using the $W \to μν$ decay channel, based on a sample of proton-proton collision data collected by th…

hep-ex2026

Precision measurement of the muon charge asymmetry from $W$ -boson decays in $pp$ collisions at $s$ = 13 TeV in the forward region

LHCb collaboration, R. Aaij, M. Abdelfatah +1114

A precision measurement of the muon charge asymmetry from $W$ -boson decays in proton-proton collisions at $s$ = 13 TeV is presented. The analysis utilizes data corresponding…

hep-ex2026

Measurement of inclusive production of charmonium states in $b$ -hadron decays via their decay into $ϕϕ$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1176

The inclusive production of the $η_{c} (1 S)$ , $η_{c} (2 S)$ and $χ_{c}$ charmonium states in $b$ -hadron decays is studied with LHCb Run~2 data, corresponding to an integrated luminosity o…

hep-ex2026

Search for the lepton-flavour violating decays $B^{+} \to π^{+} μ^{\pm} e^{\mp}$

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

The first search for the lepton-flavour violating decays $B^{+} \to π^{+} μ^{\pm} e^{\mp}$ in proton-proton collisions is presented, using data collected by the LHCb experiment between…

hep-ex2026

Study of the $B^{0} \to Λ_{c}^{+} Λ ˉ_{c}^{-} K_{S}^{0}$ decay

LHCb collaboration, R. Aaij, M. Abdelfatah +1113

The decay $B^{0} \to Λ_{c}^{+} Λ ˉ_{c}^{-} K_{S}^{0}$ is studied at LHCb for the first time using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of $\s…

hep-ex2026

Test of lepton flavour universality with $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays at large dilepton invariant mass

LHCb collaboration, R. Aaij, M. Abdelfatah +1115

Muon-electron universality is tested in $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays, in the dilepton-invariant-mass region above the $ψ (2 S)$ resonance. The analysis uses beauty mesons…

hep-ex2026

Search for the decays $B_{(s)}^{0} \to J / ψ γ$ at LHCb

LHCb collaboration, R. Aaij, M. Abdelfatah +1116

A search for the rare decays $B_{(s)}^{0} \to J / ψ γ$ is performed with proton-proton collision data collected by the LHCb experiment, corresponding to integrated luminosities of $3~\rm…

hep-ex2026

Measurement of CP asymmetries in $B^{0} \to D_{s}^{-} D^{+}$ and $B_{s}^{0} \to D_{s}^{+} D^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1190

Measurements of the combined CP asymmetries in $B^{0} \to D_{s}^{-} D^{+}$ and $B_{s}^{0} \to D_{s}^{+} D^{-}$ decays are ma…

hep-ex2026

Measurement of the local and nonlocal amplitudes in $B^{+} \to K^{+} μ^{+} μ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1187

This paper presents a thorough study of the local and nonlocal amplitudes in $B^{+} \to K^{+} μ^{+} μ^{-}$ transitions through an amplitude analysis of the dimuon mass spectrum of the decay.…

hep-ex2026

Improved branching-fraction measurements of $B_{(s)}^{0} \to K_{S}^{0} h^{+} h^{^{'} -}$ decays and first observation of $B_{s}^{0} \to K_{S}^{0} K^{+} K^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1123

This paper presents a study of the charmless three-body decays $B_{(s)}^{0} \to K_{S}^{0} h^{+} h^{' -}$ (where $h^{(')} = π, K$ ), using a sample of $pp$ collision d…

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

$B$ -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

First measurement of the decay-time-integrated $C P$ asymmetry in $B_{s}^{0} \to D_{s}^{-} π^{+}$ decays

LHCb collaboration, R. Aaij, M. Abdelfatah +1114

A measurement of the flavor-untagged decay-time-integrated $C P$ asymmetry in the flavor-specific decay $B_{s}^{0} \to D_{s}^{-} π^{+}$ , $⟨ A_{untagged}^{s} ⟩$ , is perform…

hep-ex2026

A method for luminosity determination based on real-time hit reconstruction with the LHCb silicon pixel detector

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1177

The data acquisition system of the upgraded LHCb experiment includes the fast reconstruction of all hits in the vertex locator (VELO) pixel detector at the beam-crossing rate of 40…

hep-ex2026

Search for $τ^{-} \to μ^{-} μ^{+} μ^{-}$ decays at the LHCb experiment with Run 2 data

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

A search for the lepton-flavour-violating decay $τ^{-} \to μ^{-} μ^{+} μ^{-}$ is carried out using data collected by the LHCb experiment between 2016 and 2018 in proton-proton collisions at t…

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

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 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-ex2025★ 2 cited

Search for heavy neutral leptons in B-meson decays

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

A search for long-lived heavy neutral leptons produced in B-meson decays and decaying to a $μ^{\pm} π^{\mp}$ final state is performed with data collected by the LHCb experiment in pro…

hep-ex2025

Measurement of the top-quark production cross-section and charge asymmetry at LHCb

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

The first measurements of the top- and antitop-quark differential production cross-sections and the top-quark charge asymmetry in the forward region are presented, using proton-pro…

A converged architecture for processing 32 Tbps of physics data in real-time at the LHCb experiment

Differential measurement of the branching fraction and CP asymmetry of the decay B±→π±μ+μ−

Measurement of the W-boson production cross-sections in pp collisions at s​ = 13 TeV in the forward region

Precision measurement of the muon charge asymmetry from W-boson decays in pp collisions at s​ = 13 TeV in the forward region

Measurement of inclusive production of charmonium states in b-hadron decays via their decay into ϕϕ

Search for the lepton-flavour violating decays B+→π+μ±e∓

Study of the B0→Λc+​Λˉc−​KS0​ decay

Test of lepton flavour universality with B0→K∗0ℓ+ℓ− decays at large dilepton invariant mass

Search for the decays B(s)0​→J/ψγ at LHCb

Measurement of CP asymmetries in B0→Ds−​D+ and Bs0​→Ds+​D− decays

Measurement of the local and nonlocal amplitudes in B+→K+μ+μ− decays

Improved branching-fraction measurements of B(s)0​→KS0​h+h′− decays and first observation of Bs0​→KS0​K+K−

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

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

First measurement of the decay-time-integrated CP asymmetry in Bs0​→Ds−​π+ decays

A method for luminosity determination based on real-time hit reconstruction with the LHCb silicon pixel detector

Search for τ−→μ−μ+μ− decays at the LHCb experiment with Run 2 data

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

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

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

Search for heavy neutral leptons in B-meson decays

Measurement of the top-quark production cross-section and charge asymmetry at LHCb

Differential measurement of the branching fraction and $C P$ asymmetry of the decay $B^{\pm} \to π^{\pm} μ^{+} μ^{-}$

Measurement of the $W$ -boson production cross-sections in $pp$ collisions at $s$ = 13 TeV in the forward region

Precision measurement of the muon charge asymmetry from $W$ -boson decays in $pp$ collisions at $s$ = 13 TeV in the forward region

Measurement of inclusive production of charmonium states in $b$ -hadron decays via their decay into $ϕϕ$

Search for the lepton-flavour violating decays $B^{+} \to π^{+} μ^{\pm} e^{\mp}$

Study of the $B^{0} \to Λ_{c}^{+} Λ ˉ_{c}^{-} K_{S}^{0}$ decay

Test of lepton flavour universality with $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays at large dilepton invariant mass

Search for the decays $B_{(s)}^{0} \to J / ψ γ$ at LHCb

Measurement of CP asymmetries in $B^{0} \to D_{s}^{-} D^{+}$ and $B_{s}^{0} \to D_{s}^{+} D^{-}$ decays

Measurement of the local and nonlocal amplitudes in $B^{+} \to K^{+} μ^{+} μ^{-}$ decays

Improved branching-fraction measurements of $B_{(s)}^{0} \to K_{S}^{0} h^{+} h^{^{'} -}$ decays and first observation of $B_{s}^{0} \to K_{S}^{0} K^{+} K^{-}$

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

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

First measurement of the decay-time-integrated $C P$ asymmetry in $B_{s}^{0} \to D_{s}^{-} π^{+}$ decays

Search for $τ^{-} \to μ^{-} μ^{+} μ^{-}$ decays at the LHCb experiment with Run 2 data

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

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

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