J. A. Vries

activity

20182026

most citedObservation of structure in the

J / ψ

-pair mass spectrum

414 citations · 3k across the 92 of their papers we have counts for

collaborators

95 papers

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 ratio of branching fractions $B (B_{c}^{+} \to J / ψ τ^{+} ν_{τ}) / B (B_{c}^{+} \to J / ψ μ^{+} ν_{μ})$

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

A measurement of the ratio of semileptonic branching fractions $R (J ψ)$ , defined as $\mathcal{R}(J/ψ) \equiv \mathcal{B}(B_c^+ \to J/ψτ^+ ν_τ)/\mathcal{B}(B_c^+ \to J/ψμ^+…

hep-ex2026

Associated $Z$ + $J / ψ$ production as a probe of multiparton interactions in the forward region

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

This letter reports a study of associated $Z$ boson and prompt $J / ψ$ production in proton-proton collisions at $s = 13$ TeV with the LHCb detector in the forward rapidity regi…

nucl-ex2026

Study of nuclear effects on charm production in light-ion collisions

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

The onset of nuclear effects in light-ion collisions is studied by measuring the ratio of $D^{0}$ meson production between NeNe and OO collisions at a center-of-mass energy per nucle…

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

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

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-ex2025

Precision measurement of CP violation and branching fractions in $B^{\pm} \to K_{S}^{0} h^{\pm}$ $(h = π, K)$ decays and search for the rare decay $B_{c}^{\pm} \to K_{S}^{0} K^{\pm}$

R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta +1177

The decay $B^{\pm} \to K_{S}^{0} π^{\pm}$ , with a $C P$ asymmetry expected to be close to zero in the Standard Model, is theoretically clean and sensitive to potential new ph…

hep-ex2025★ 1 cited

First observation of the $B_{s}^{0} \to Λ_{c}^{+} Λ_{c}^{-}$ decay and evidence for the $B^{0} \to Λ_{c}^{+} Λ_{c}^{-}$ decay

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

A search is presented for the two-body charmed baryonic decays $B_{(s)}^{0} \to Λ_{c}^{+} Λ_{c}^{-}$ , using a data sample collected by the LHCb experiment during…

hep-ex2025★ 2 cited

First observation of $C P$ violation and measurement of polarization in $B^{+} \to ρ (770)^{0} K^{*} (892)^{+}$ decays

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

An amplitude analysis of the $B^{+} \to (π^{+} π^{-}) (K_{S}^{0} π^{+})$ decay is performed in the mass regions $0.30 < m_{π^{+} π^{-}} < 1.10 GeV / c^{2}$ and $0.75 < m_{K^0_{\mathrm{S…

hep-ex2023★ 4 cited

Curvature-bias corrections using a pseudomass method

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1078

Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biase…

hep-ex2023

Observation of $Ξ_{b}^{0} \to Ξ_{c}^{+} D_{s}^{-}$ and $Ξ_{b}^{-} \to Ξ_{c}^{0} D_{s}^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1090

The $Ξ_{b}^{0} \to Ξ_{c}^{+} D_{s}^{-}$ and $Ξ_{b}^{-} \to Ξ_{c}^{0} D_{s}^{-}$ decays are observed for the first time using proton-proton collision data collected by the LHCb experiment a…

hep-ex2023★ 1 cited

Search for $CP$ violation in the phase space of $D^{0} \to K_{S}^{0} K^{\pm} π^{\mp}$ decays with the energy test

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1091

A search for $CP$ violation in $D^{0} \to K_{S}^{0} K^{+} π^{-}$ and $D^{0} \to K_{S}^{0} K^{-} π^{+}$ decays is reported. The search is performed using…

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

Measurement of the ratio of branching fractions B(Bc+​→J/ψτ+ντ​)/B(Bc+​→J/ψμ+νμ​)

Associated Z + J/ψ production as a probe of multiparton interactions in the forward region

Study of nuclear effects on charm production in light-ion collisions

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

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

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

Precision measurement of CP violation and branching fractions in B±→KS0​h± (h=π,K) decays and search for the rare decay Bc±​→KS0​K±

First observation of the Bs0​→Λc+​Λc​− decay and evidence for the B0→Λc+​Λc​− decay

First observation of CP violation and measurement of polarization in B+→ρ(770)0K∗(892)+ decays

Curvature-bias corrections using a pseudomass method

Observation of Ξb0​→Ξc+​Ds−​ and Ξb−​→Ξc0​Ds−​ decays

Search for CP violation in the phase space of D0→KS0​K±π∓ decays with the energy test

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

Measurement of the ratio of branching fractions $B (B_{c}^{+} \to J / ψ τ^{+} ν_{τ}) / B (B_{c}^{+} \to J / ψ μ^{+} ν_{μ})$

Associated $Z$ + $J / ψ$ production as a probe of multiparton interactions in the forward region

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

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

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

Precision measurement of CP violation and branching fractions in $B^{\pm} \to K_{S}^{0} h^{\pm}$ $(h = π, K)$ decays and search for the rare decay $B_{c}^{\pm} \to K_{S}^{0} K^{\pm}$

First observation of the $B_{s}^{0} \to Λ_{c}^{+} Λ_{c}^{-}$ decay and evidence for the $B^{0} \to Λ_{c}^{+} Λ_{c}^{-}$ decay

First observation of $C P$ violation and measurement of polarization in $B^{+} \to ρ (770)^{0} K^{*} (892)^{+}$ decays

Observation of $Ξ_{b}^{0} \to Ξ_{c}^{+} D_{s}^{-}$ and $Ξ_{b}^{-} \to Ξ_{c}^{0} D_{s}^{-}$ decays

Search for $CP$ violation in the phase space of $D^{0} \to K_{S}^{0} K^{\pm} π^{\mp}$ decays with the energy test