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 2019Show all

37 papers · 1 filter

hep-ex2019★ 32 cited

Search for $C P$ violation and observation of $P$ violation in $Λ_{b}^{0} \to p π^{-} π^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +902

A search for $C P$ violation in the $Λ_{b}^{0} \to p π^{-} π^{+} π^{-}$ decay is performed using LHCb data corresponding to an integrated luminosity of 6.6 $f b^{- 1}$ collected in $pp$ coll…

hep-ex2019★ 64 cited

Test of lepton universality with $Λ_{b}^{0} \to p K^{-} ℓ^{+} ℓ^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +904

The ratio of branching fractions of the decays $Λ_{b}^{0} \to p K^{-} e^{+} e^{-}$ and $Λ_{b}^{0} \to p K^{-} μ^{+} μ^{-}$ , $R_{p K}^{- 1}$ , is measured for the first time using proton-proto…

hep-ex2019★ 17 cited

Isospin amplitudes in $Λ_{b}^{0} \to J / ψ Λ (Σ^{0})$ and $Ξ_{b}^{0} \to J / ψ Ξ^{0} (Λ)$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +902

Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions, and allow searches for physics beyond the Standard Model. We…

hep-ex2019★ 47 cited

Precision measurement of the $Ξ_{cc}^{++}$ mass

LHCb collaboration, R. Aaij, C. Abellán Beteta +901

A measurement of the $Ξ_{cc}^{++}$ mass is performed using data collected by the LHCb experiment between 2016 and 2018 in $pp$ collisions at a centre-of-mass energy of 13 TeV, corr…

hep-ex2019★ 5 cited

Observation of the semileptonic decay $B^{+} \to p p μ^{+} ν_{μ}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +900

The Cabibbo-suppressed semileptonic decay $B^{+} \to p p μ^{+} ν_{μ}$ is observed for the first time using a sample of $pp$ collisions corresponding to an integrated luminosit…

hep-ex2019★ 31 cited

Determination of quantum numbers for several excited charmed mesons observed in $B^{-} \to D^{*+} π^{-} π^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +907

A four-body amplitude analysis of the $B^{-} \to D^{*+} π^{-} π^{-}$ decay is performed, where fractions and relative phases of the various resonances contributing to the decay are measu…

hep-ex2019★ 37 cited

Measurement of the $η_{c} (1 S)$ production cross-section in $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, C. Abellán Beteta +913

Using a data sample corresponding to an integrated luminosity of $2.0 f b^{- 1}$ , collected by the LHCb experiment, the production of the $η_{c} (1 S)$ state in proton-proton collisions…

hep-ex2019★ 21 cited

Updated measurement of decay-time-dependent CP asymmetries in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +910

A search for decay-time-dependent charge-parity ( $C P$ ) asymmetry in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays is performed at the LHCb experiment using proton-proton collision d…

hep-ex2019★ 37 cited

Measurement of the $B_{c}^{-}$ meson production fraction and asymmetry in 7 and 13 TeV $pp$ collisions

LHCb collaboration, R. Aaij, C. Abellán Beteta +900

The production fraction of the $B_{c}^{-}$ meson with respect to the sum of $B^{-}$ and $B ˉ^{0}$ mesons is measured in both 7 and 13 TeV center-of-mass energy $pp$ collisions produced…

hep-ex2019★ 29 cited

Measurement of $Ξ_{cc}^{++}$ production in $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, C. Abellán Beteta +900

The production of $Ξ_{cc}^{++}$ baryons in proton-proton collisions at a centre-of-mass energy of $s = 13$ TeV is measured in the transverse-momentum range $4<p_\mathrm…

hep-ex2019★ 267 cited

Search for $A^{'} \to μ^{+} μ^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +905

Searches are performed for both prompt-like and long-lived dark photons, $A^{'}$ , produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look for $A…

hep-ex2019★ 28 cited

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

LHCb collaboration, R. Aaij, C. Abellán Beteta +895

A search for the lepton-flavour violating decays $B^{+} \to K^{+} μ^{\pm} e^{\mp}$ is performed using a sample of proton-proton collision data, collected with the LHCb experiment at ce…

hep-ex2019★ 75 cited

Amplitude analysis of the $B^{+} \to π^{+} π^{+} π^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +868

The results of an amplitude analysis of the charmless three-body decay $B^{+} \to π^{+} π^{+} π^{-}$ , in which $C P$ -violation effects are taken into account, are reported. The anal…

hep-ex2019★ 13 cited

Measurement of the electron reconstruction efficiency at LHCb

LHCb collaboration, R. Aaij, C. Abellán Beteta +910

The single electron track-reconstruction efficiency is calibrated using a sample corresponding to $1.3 fb^{- 1}$ of $pp$ collision data recorded with the LHCb detector in 20…

hep-ex2019★ 35 cited

Precision measurement of the $Λ_{c}^{+}$ , $Ξ_{c}^{+}$ and $Ξ_{c}^{0}$ baryon lifetimes

LHCb collaboration, R. Aaij, C. Abellán Beteta +847

We report measurements of the lifetimes of the $Λ_{c}^{+}$ , $Ξ_{c}^{+}$ and $Ξ_{c}^{0}$ charm baryons using proton-proton collision data at center-of-mass energies of 7 and 8\tev, correspondin…

hep-ex2019★ 18 cited

Measurement of psi(2S) production cross-sections in proton-proton collisions at 7 and 13 TeV

LHCb collaboration, R. Aaij, C. Abellán Beteta +842

The cross-sections of $ψ (2 S)$ meson production in proton-proton collisions at $s = 13 TeV$ are measured with a data sample collected by the LHCb detector correspondin…

hep-ph2019

Impacts of radiative corrections on measurements of lepton flavour universality in $B \to D ℓ ν_{ℓ}$ decays

Suzanne Klaver

Radiative corrections to $B \to D ℓ ν_{ℓ}$ decays can have an impact on predictions and measurements of the lepton universality ratios $R (D^{+})$ and $\mathcal{R}(D^0…

hep-ex2019

Lepton flavour universality in charged-current $B$ decays

Suzanne Klaver

Tests of lepton flavour universality in charged-current $B$ decays offer an excellent opportunity to test the Standard Model, and show hints of new physics in analyses performed by…

hep-ex2019★ 16 cited

Measurement of CP violation in the $B_{s}^{0} \to ϕϕ$ decay and search for the $B^{0} \to ϕϕ$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +868

A measurement of the time-dependent CP-violating asymmetry in $B_{s}^{0} \to ϕϕ$ decays is presented. Using a sample of proton-proton collision data corresponding to an integrate…

hep-ex2019★ 14 cited

Observation of the $Λ_{b}^{0} \to χ_{c 1} (3872) p K^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +903

Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9fb $^{- 1}$ of integrated luminosity at the centre-of-mass energies of 7, 8,…

hep-ex2019★ 46 cited

Updated measurement of time-dependent $C P$ -violating observables in $B_{s}^{0} \to J / ψ K^{+} K^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +910

The decay-time-dependent $C P$ asymmetry in $B_{s}^{0} \to J / ψ K^{+} K^{-}$ decays is measured using proton-proton collision data, corresponding to an integrated luminosity of $1.9\,\…

hep-ex2019★ 738 cited

Observation of a narrow pentaquark state, $P_{c} (4312)^{+}$ , and of two-peak structure of the $P_{c} (4450)^{+}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +866

A narrow pentaquark state, $P_{c} (4312)^{+}$ , decaying to $J / ψ p$ is discovered with a statistical significance of $7.3 σ$ in a data sample of $Λ_{b}^{0} \to J / ψ p K^{-}$ decays which is an or…

hep-ex2019★ 15 cited

Amplitude analysis of the $B_{(s)} \to K^{* 0} K^{* 0}$ decays and measurement of the branching fraction of the $B \to K^{* 0} K^{* 0}$ decay

LHCb Collaboration, R. Aaij, C. Abellán Beteta +844

The $B^{0} \to K^{* 0} K^{* 0}$ and $B_{s}^{0} \to K^{* 0} K^{* 0}$ decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3…

hep-ex2019★ 52 cited

Search for the lepton-flavour-violating decays $B_{s}^{0} \to τ^{\pm} μ^{\mp}$ and $B^{0} \to τ^{\pm} μ^{\mp}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +863

A search for $B_{s}^{0} \to τ^{\pm} μ^{\mp}$ and $B^{0} \to τ^{\pm} μ^{\mp}$ decays is performed using data corresponding to an integrated luminosity of 3 fb $^{- 1}$ of proton-proton coll…

Search for CP violation and observation of P violation in Λb0​→pπ−π+π− decays

Test of lepton universality with Λb0​→pK−ℓ+ℓ− decays

Isospin amplitudes in Λb0​→J/ψΛ(Σ0) and Ξb0​→J/ψΞ0(Λ) decays

Precision measurement of the Ξcc++​ mass

Observation of the semileptonic decay B+→pp​μ+νμ​

Determination of quantum numbers for several excited charmed mesons observed in B−→D∗+π−π− decays

Measurement of the ηc​(1S) production cross-section in pp collisions at s​=13 TeV

Updated measurement of decay-time-dependent CP asymmetries in D0→K+K− and D0→π+π− decays

Measurement of the Bc−​ meson production fraction and asymmetry in 7 and 13 TeV pp collisions

Measurement of Ξcc++​ production in pp collisions at s​=13 TeV

Search for A′→μ+μ− decays

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

Amplitude analysis of the B+→π+π+π− decay

Measurement of the electron reconstruction efficiency at LHCb

Precision measurement of the Λc+​, Ξc+​ and Ξc0​ baryon lifetimes

Measurement of psi(2S) production cross-sections in proton-proton collisions at 7 and 13 TeV

Impacts of radiative corrections on measurements of lepton flavour universality in B→Dℓνℓ​ decays

Lepton flavour universality in charged-current B decays

Measurement of CP violation in the Bs0​→ϕϕ decay and search for the B0→ϕϕ decay

Observation of the Λb0​→χc1​(3872)pK− decay

Updated measurement of time-dependent CP-violating observables in Bs0​→J/ψK+K− decays

Observation of a narrow pentaquark state, Pc​(4312)+, and of two-peak structure of the Pc​(4450)+

Amplitude analysis of the B(s)​→K∗0K∗0 decays and measurement of the branching fraction of the B→K∗0K∗0 decay

Search for the lepton-flavour-violating decays Bs0​→τ±μ∓ and B0→τ±μ∓

Search for $C P$ violation and observation of $P$ violation in $Λ_{b}^{0} \to p π^{-} π^{+} π^{-}$ decays

Test of lepton universality with $Λ_{b}^{0} \to p K^{-} ℓ^{+} ℓ^{-}$ decays

Isospin amplitudes in $Λ_{b}^{0} \to J / ψ Λ (Σ^{0})$ and $Ξ_{b}^{0} \to J / ψ Ξ^{0} (Λ)$ decays

Precision measurement of the $Ξ_{cc}^{++}$ mass

Observation of the semileptonic decay $B^{+} \to p p μ^{+} ν_{μ}$

Determination of quantum numbers for several excited charmed mesons observed in $B^{-} \to D^{*+} π^{-} π^{-}$ decays

Measurement of the $η_{c} (1 S)$ production cross-section in $pp$ collisions at $s = 13$ TeV

Updated measurement of decay-time-dependent CP asymmetries in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays

Measurement of the $B_{c}^{-}$ meson production fraction and asymmetry in 7 and 13 TeV $pp$ collisions

Measurement of $Ξ_{cc}^{++}$ production in $pp$ collisions at $s = 13$ TeV

Search for $A^{'} \to μ^{+} μ^{-}$ decays

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

Amplitude analysis of the $B^{+} \to π^{+} π^{+} π^{-}$ decay

Precision measurement of the $Λ_{c}^{+}$ , $Ξ_{c}^{+}$ and $Ξ_{c}^{0}$ baryon lifetimes

Impacts of radiative corrections on measurements of lepton flavour universality in $B \to D ℓ ν_{ℓ}$ decays

Lepton flavour universality in charged-current $B$ decays

Measurement of CP violation in the $B_{s}^{0} \to ϕϕ$ decay and search for the $B^{0} \to ϕϕ$ decay

Observation of the $Λ_{b}^{0} \to χ_{c 1} (3872) p K^{-}$ decay

Updated measurement of time-dependent $C P$ -violating observables in $B_{s}^{0} \to J / ψ K^{+} K^{-}$ decays

Observation of a narrow pentaquark state, $P_{c} (4312)^{+}$ , and of two-peak structure of the $P_{c} (4450)^{+}$

Amplitude analysis of the $B_{(s)} \to K^{* 0} K^{* 0}$ decays and measurement of the branching fraction of the $B \to K^{* 0} K^{* 0}$ decay

Search for the lepton-flavour-violating decays $B_{s}^{0} \to τ^{\pm} μ^{\mp}$ and $B^{0} \to τ^{\pm} μ^{\mp}$