S. Klaver

activity

20122026

J / ψ p

resonances consistent with pentaquark states in

Λ_{b}^{0} \to J / ψ K^{-} p

decays

1.3k citations · 21.5k across the 430 of their papers we have counts for

collaborators

Showing 2024Show all

38 papers · 1 filter

hep-ex2024★ 10 cited

Measurement of $C P$ asymmetries in $Λ_{b}^{0} \to p h^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1129

A search for $C P$ violation in $Λ_{b}^{0} \to p K^{-}$ and $Λ_{b}^{0} \to p π^{-}$ decays is presented using the full Run 1 and Run 2 data samples of $pp$ collisions collected with…

hep-ex2024★ 3 cited

Test of lepton flavour universality with $B^{+} \to K^{+} π^{+} π^{-} ℓ^{+} ℓ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1132

The first test of lepton flavor universality between muons and electrons using $B^{+} \to K^{+} π^{+} π^{-} ℓ^{+} ℓ^{-}$ ( $ℓ = e, μ$ ) decays is presented. The measurement is performed with d…

hep-ex2024★ 5 cited

Search for $D^{0}$ meson decays to $π^{+} π^{-} e^{+} e^{-}$ and $K^{+} K^{-} e^{+} e^{-}$ final states

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1130

A search for $D^{0}$ meson decays to the $π^{+} π^{-} e^{+} e^{-}$ and $K^{+} K^{-} e^{+} e^{-}$ final states is reported using a sample of proton-proton collisions collected by the LHCb experiment at a c…

hep-ex2024★ 4 cited

Constraints on the photon polarisation in $b \to s γ$ transitions using $B_{s}^{0} \to ϕ e^{+} e^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1124

An angular analysis of the $B_{s}^{0} \to ϕ e^{+} e^{-}$ decay is performed using the proton-proton collision dataset collected between 2011 and 2018 by the LHCb experiment, correspo…

hep-ex2024★ 2 cited

Measurement of the CKM angle $γ$ in $B^{\pm} \to D K^{*} (892)^{\pm}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1114

Measurements of $C P$ observables and the CKM angle $γ$ are performed in $B^{\pm} \to D K^{*} (892)^{\pm}$ decays, where $D$ represents a superposition of $D^{0}$ and $D^{0}$ …

hep-ex2024★ 5 cited

Measurements of $ψ (2 S)$ and $χ_{c 1} (3872)$ production within fully reconstructed jets

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1114

This paper presents the first measurement of $ψ (2 S)$ and $χ_{c 1} (3872)$ meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its dec…

hep-ex2024★ 8 cited

Measurement of exclusive $J / ψ$ and $ψ (2 S)$ production at $s = 13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1075

Measurements are presented of the cross-section for the central exclusive production of $J / ψ \to μ^{+} μ^{-}$ and $ψ (2 S) \to μ^{+} μ^{-}$ processes in proton-proton collisions at $\sqrt{s} = 13…

hep-ex2024

Measurement of $\itΛ_\it{b}^0$, $\itΛ_\it{c}^+$ and $Λ$ decay parameters using $\itΛ_\it{b}^0 \to \itΛ_\it{c}^+ h^-$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1106

A comprehensive study of the angular distributions in the bottom-baryon decays $Λ_{b}^{0} \to Λ_{c}^{+} h^{-} (h = π, K)$ , followed by $Λ_{c}^{+} \to Λ h^{+}$ with $\itΛ\to \it{p} π^…

hep-ex2024

Study of the rare decay $J / ψ \to μ^{+} μ^{-} μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1099

The rare electromagnetic $J / ψ \to μ^{+} μ^{-} μ^{+} μ^{-}$ decay is observed with a significance greatly exceeding the discovery threshold, using proton-proton collision data collected by the…

physics.acc-ph2024

The ECFA Early-Career Researchers Panel: Report for the year 2023

Julia Allen, Bruno Alves, Jan-Hendrik Arling +67

The European Committee for Future Accelerators (ECFA) Early-Career Researcher (ECR) panel, which represents the interests of the ECR community to ECFA, presents in this document it…

hep-ex2024★ 5 cited

Observation of exotic $J / ψ ϕ$ resonant structure in diffractive processes in proton-proton collisions

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1072

The first study of $J / ψ ϕ$ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at centre-of-mass energy of 1…

hep-ex2024★ 4 cited

Study of charmonium production via the decay to $p p ˉ$ at $s = 13 T e V$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1063

Charmonium production cross-section in proton-proton collisions is measured at the centre-of-mass energy $s = 13 T e V$ using decays to $p p ˉ$ final state. The study is per…

hep-ex2024★ 5 cited

Amplitude analysis of $B^{+} \to ψ (2 S) K^{+} π^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1096

The first full amplitude analysis of $B^{+} \to ψ (2 S) K^{+} π^{+} π^{-}$ decays is performed using proton-proton collision data corresponding to an integrated luminosity of $9\,\text{fb}^{…

hep-ex2024★ 6 cited

Search for the rare decay of charmed baryon $Λ_{c}^{+}$ into $p μ^{+} μ^{-}$ final state

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066

A search for the nonresonant $Λ_{c}^{+} \to p μ^{+} μ^{-}$ decay is performed using proton-proton collision data recorded at a centre-of-mass energy of 13 TeV by the LHCb experiment, corre…

hep-ex2024★ 13 cited

Probing the nature of the $χ_{c 1} (3872)$ state using radiative decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1097

The radiative decays $χ_{c 1} (3872) \to ψ (2 S) γ$ and $χ_{c 1} (3872) \to J / ψ γ$ are used to probe the~nature of the~ $χ_{c 1} (3872)$ state using proton-proton collision data…

hep-ex2024★ 1 cited

Precision measurement of the $Ξ_{b}^{-}$ baryon lifetime

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1067

A sample of $pp$ collision data, corresponding to an integrated luminosity of 5.5 fb $^{- 1}$ and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of t…

hep-ex2024★ 14 cited

Measurement of the branching fraction ratios $R (D^{+})$ and $R (D^{*+})$ using muonic $τ$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066

The branching fraction ratios of $B^{0} \to D^{+} τ^{-} ν_{τ}$ and $B^{0} \to D^{*+} τ^{-} ν_{τ}$ decays are measured with respect to their muonic counterparts,…

hep-ex2024

Observation of new charmonium(-like) states in $B^{+} \to D^{*\pm} D^{\mp} K^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066

A study of resonant structures in $B^{+} \to D^{*+} D^{-} K^{+}$ and $B^{+} \to D^{*-} D^{+} K^{+}$ decays is performed, using proton-proton collision data at cen…

hep-ex2024★ 1 cited

Amplitude analysis of the radiative decay $B_{s}^{0} \to K^{+} K^{-} γ$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1064

A search for radiative decay of $B_{s}^{0}$ mesons to orbitally excited $K^{+} K^{-}$ states is performed using proton proton collisions recorded by the \mbox{LHCb}\xspace experiment, corre…

hep-ex2024

Human-in-the-loop Reinforcement Learning for Data Quality Monitoring in Particle Physics Experiments

Olivia Jullian Parra, Julián García Pardiñas, Lorenzo Del Pianta Pérez +4

Data Quality Monitoring (DQM) is a crucial task in large particle physics experiments, since detector malfunctioning can compromise the data. DQM is currently performed by human sh…

hep-ex2024

Comprehensive analysis of local and nonlocal amplitudes in the $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1073

A comprehensive study of the local and nonlocal amplitudes contributing to the decay $B^{0} \to K^{* 0} (\to K^{+} π^{-}) μ^{+} μ^{-}$ is performed by analysing the phase-space distributi…

hep-ex2024★ 3 cited

Search for the lepton-flavor violating decay $B_{s}^{0} \to ϕ μ^{\pm} τ^{\mp}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1065

A search for the lepton-flavor violating decays $B_{s}^{0} \to ϕ μ^{\pm} τ^{\mp}$ is presented, using a sample of proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV, colle…

hep-ex2024

Study of $b$ -hadron decays to $Λ_{c}^{+} h^{-} h^{' -}$ final states

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1075

Decays of $Ξ_{b}^{-}$ and $Ω_{b}^{-}$ baryons to $Λ_{c}^{+} h^{-} h^{' -}$ final states, with $h^{-} h^{' -}$ being $π^{-} π^{-}$ , $K^{-} π^{-}$ and $K^{-} K^{-}$ meson pairs…

hep-ex2024★ 7 cited

Transverse polarization measurement of $Λ$ hyperons in $p$ Ne collisions at $s_{N N}$ = 68.4 GeV with the $\mbox{LHCb}$ detector

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1068

A measurement of the transverse polarization of the $Λ$ and $Λ ˉ$ hyperons in $p$ Ne fixed-target collisions at $s_{N N}$ = 68.4 GeV is presented using data collected by the…

Measurement of CP asymmetries in Λb0​→ph− decays

Test of lepton flavour universality with B+→K+π+π−ℓ+ℓ− decays

Search for D0 meson decays to π+π−e+e− and K+K−e+e− final states

Constraints on the photon polarisation in b→sγ transitions using Bs0​→ϕe+e− decays

Measurement of the CKM angle γ in B±→DK∗(892)± decays

Measurements of ψ(2S) and χc1​(3872) production within fully reconstructed jets

Measurement of exclusive J/ψ and ψ(2S) production at s​=13 TeV

Measurement of $\itΛ_\it{b}^0$, $\itΛ_\it{c}^+$ and Λ decay parameters using $\itΛ_\it{b}^0 \to \itΛ_\it{c}^+ h^-$ decays

Study of the rare decay J/ψ→μ+μ−μ+μ−

The ECFA Early-Career Researchers Panel: Report for the year 2023

Observation of exotic J/ψϕ resonant structure in diffractive processes in proton-proton collisions

Study of charmonium production via the decay to ppˉ​ at s​=13TeV

Amplitude analysis of B+→ψ(2S)K+π+π− decays

Search for the rare decay of charmed baryon Λc+​ into pμ+μ− final state

Probing the nature of the χc1​(3872) state using radiative decays

Precision measurement of the Ξb−​ baryon lifetime

Measurement of the branching fraction ratios R(D+) and R(D∗+) using muonic τ decays

Observation of new charmonium(-like) states in B+→D∗±D∓K+ decays

Amplitude analysis of the radiative decay Bs0​→K+K−γ

Human-in-the-loop Reinforcement Learning for Data Quality Monitoring in Particle Physics Experiments

Comprehensive analysis of local and nonlocal amplitudes in the B0→K∗0μ+μ− decay

Search for the lepton-flavor violating decay Bs0​→ϕμ±τ∓

Study of b-hadron decays to Λc+​h−h′− final states

Transverse polarization measurement of Λ hyperons in pNe collisions at sNN​​ = 68.4 GeV with the $\mbox{LHCb}$ detector

Measurement of $C P$ asymmetries in $Λ_{b}^{0} \to p h^{-}$ decays

Test of lepton flavour universality with $B^{+} \to K^{+} π^{+} π^{-} ℓ^{+} ℓ^{-}$ decays

Search for $D^{0}$ meson decays to $π^{+} π^{-} e^{+} e^{-}$ and $K^{+} K^{-} e^{+} e^{-}$ final states

Constraints on the photon polarisation in $b \to s γ$ transitions using $B_{s}^{0} \to ϕ e^{+} e^{-}$ decays

Measurement of the CKM angle $γ$ in $B^{\pm} \to D K^{*} (892)^{\pm}$ decays

Measurements of $ψ (2 S)$ and $χ_{c 1} (3872)$ production within fully reconstructed jets

Measurement of exclusive $J / ψ$ and $ψ (2 S)$ production at $s = 13$ TeV

Measurement of $\itΛ_\it{b}^0$, $\itΛ_\it{c}^+$ and $Λ$ decay parameters using $\itΛ_\it{b}^0 \to \itΛ_\it{c}^+ h^-$ decays

Study of the rare decay $J / ψ \to μ^{+} μ^{-} μ^{+} μ^{-}$

Observation of exotic $J / ψ ϕ$ resonant structure in diffractive processes in proton-proton collisions

Study of charmonium production via the decay to $p p ˉ$ at $s = 13 T e V$

Amplitude analysis of $B^{+} \to ψ (2 S) K^{+} π^{+} π^{-}$ decays

Search for the rare decay of charmed baryon $Λ_{c}^{+}$ into $p μ^{+} μ^{-}$ final state

Probing the nature of the $χ_{c 1} (3872)$ state using radiative decays

Precision measurement of the $Ξ_{b}^{-}$ baryon lifetime

Measurement of the branching fraction ratios $R (D^{+})$ and $R (D^{*+})$ using muonic $τ$ decays

Observation of new charmonium(-like) states in $B^{+} \to D^{*\pm} D^{\mp} K^{+}$ decays

Amplitude analysis of the radiative decay $B_{s}^{0} \to K^{+} K^{-} γ$

Comprehensive analysis of local and nonlocal amplitudes in the $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay

Search for the lepton-flavor violating decay $B_{s}^{0} \to ϕ μ^{\pm} τ^{\mp}$

Study of $b$ -hadron decays to $Λ_{c}^{+} h^{-} h^{' -}$ final states

Transverse polarization measurement of $Λ$ hyperons in $p$ Ne collisions at $s_{N N}$ = 68.4 GeV with the $\mbox{LHCb}$ detector