Oleg Yushchenko

activity

20172021

most citedTest of lepton universality in beauty-quark decays

372 citations · 1.1k across the 25 of their papers we have counts for

collaborators

25 papers

hep-ex2021★ 32 cited

Observation of two new excited $Ξ_{b}^{0}$ states decaying to $Λ_{b}^{0} K^{-} π^{+}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +995

Two narrow resonant states are observed in the $Λ_{b}^{0} K^{-} π^{+}$ mass spectrum using a data sample of proton-proton collisions at a center-of-mass energy of 13 $TeV$ , collect…

hep-ex2021★ 4 cited

Angular analysis of the rare decay $B_{s}^{0} \to ϕ μ^{+} μ^{-}$

LHCb Collaboration, R. Aaij, A. S. W. Abdelmotteleb +992

An angular analysis of the rare decay $B_{s}^{0} \to ϕ μ^{+} μ^{-}$ is presented, using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of $7$ ,…

hep-ex2021★ 1 cited

First measurement of the $C P$ -violating phase in $B_{s}^{0} \to J / ψ (\to e^{+} e^{-}) ϕ$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +954

A flavour-tagged time-dependent angular analysis of $B_{s}^{0} \to J / ψ ϕ$ decays is presented where the $J / ψ$ meson is reconstructed through its decay to an $e^{+} e^{-}$ pair. The analysis u…

hep-ex2021★ 154 cited

Branching fraction measurements of the rare $B_{s}^{0} \to ϕ μ^{+} μ^{-}$ and $B_{s}^{0} \to f_{2}^{'} (1525) μ^{+} μ^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +959

The branching fraction of the rare $B_{s}^{0} \to ϕ μ^{+} μ^{-}$ decay is measured using data collected by the LHCb experiment at center-of-mass energies of $7$ , $8$ and $13 TeV$ …

hep-ex2021★ 372 cited

Test of lepton universality in beauty-quark decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +946

The Standard Model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged lepto…

hep-ex2020

Search for the rare decay $B^{0} \to J / ψ ϕ$

LHCb collaboration, R. Aaij, C. Abellán Beteta +962

A search for the rare decay $B^{0} \to J / ψ ϕ$ is performed using $pp$ collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, correspond…

hep-ex2020

Searches for 25 rare and forbidden decays of $D^{+}$ and $D_{s}^{+}$ mesons

LHCb collaboration, R. Aaij, C. Abellán Beteta +998

A search is performed for rare and forbidden charm decays of the form $D_{(s)}^{+} \to h^{\pm} ℓ^{+} ℓ^{(') \mp}$ , where $h^{\pm}$ is a pion or kaon and $ℓ^{(^{'}) \pm}$ is an ele…

hep-ex2020★ 28 cited

First branching fraction measurement of the suppressed decay $Ξ_{c}^{0} \to π^{-} Λ_{c}^{+}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +963

The $Ξ_{c}^{0}$ baryon is unstable and usually decays into charmless final states by the $c \to s u d$ transition. It can, however, also disintegrate into a $π^{-}$ meson and a…

hep-ex2020★ 38 cited

An investigation of the very rare $K^{+} \to π^{+} ν ν ˉ$ decay

NA62 Collaboration

The NA62 experiment reports an investigation of the $K^{+} \to π^{+} ν ν ˉ$ mode from a sample of $K^{+}$ decays collected in 2017 at the CERN SPS. The experiment has achieved a si…

hep-ex2020★ 27 cited

Measurement of the $Λ_{b}^{0} \to J / ψ Λ$ angular distribution and the $Λ_{b}^{0}$ polarisation in $pp$ collisions

LHCb collaboration, R. Aaij, C. Abellán Beteta +912

This paper presents an analysis of the $Λ_{b}^{0} \to J / ψ Λ$ angular distribution and the transverse production polarisation of $Λ_{b}^{0}$ baryons in proton-proton collisions at cen…

hep-ex2019★ 68 cited

Observation of several sources of $C P$ violation in $B^{+} \to π^{+} π^{+} π^{-}$ decays

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

Observations are reported of different sources of $C P$ violation from an amplitude analysis of $B^{+} \to π^{+} π^{+} π^{-}$ decays, based on a data sample corresponding to an integrated l…

hep-ex2019★ 68 cited

Observation of new resonances in the $Λ_{b}^{0} π^{+} π^{-}$ system

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

We report the observation of a new structure in the $Λ_{b}^{0} π^{+} π^{-}$ spectrum using the full LHCb data set of $pp$ collisions, corresponding to an integrated luminosity of $9\,\mathr…

hep-ex2019★ 52 cited

Amplitude analysis of $B^{\pm} \to π^{\pm} K^{+} K^{-}$ decays

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

The first amplitude analysis of the $B^{\pm} \to π^{\pm} K^{+} K^{-}$ decay is reported based on a data sample corresponding to an integrated luminosity of 3.0 fb $^{- 1}$ of $pp$ collisions…

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…

hep-ex2019★ 29 cited

Measurement of $C P$ -violating and mixing-induced observables in $B_{s}^{0} \to ϕ γ$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +859

A time-dependent analysis of the $B_{s}^{0} \to ϕ γ$ decay rate is performed to determine the $C P$ -violating observables $S_{ϕ γ}$ and $C_{ϕ γ}$ , and the mixing-induced observable $\mathc…

hep-ex2019★ 17 cited

A search for $Ξ_{cc}^{++} \to D^{+} p K^{-} π^{+}$ decays

LHCb Collaboration, R. Aaij, C. Abellán Beteta +848

A search for the $Ξ_{cc}^{++}$ baryon through the $Ξ_{cc}^{++} \to D^{+} p K^{-} π^{+}$ decay is performed with a data sample corresponding to an integrated luminosit…

hep-ex2019★ 17 cited

Observation of $B_{(s)}^{0} \to J / ψ p p$ decays and precision measurements of the $B_{(s)}^{0}$ masses

LHCb Collaboration, R. Aaij, C. Abellán Beteta +843

The first observation of the decays $B_{(s)}^{0} \to J / ψ p p$ is reported, using proton-proton collision data corresponding to an integrated luminosity of $5.2{\text{\,fb}}…

hep-ex2018★ 22 cited

Measurement of the charm-mixing parameter $y_{C P}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +841

A measurement of the charm-mixing parameter $y_{C P}$ using $D^{0} \to K^{+} K^{-}$ , $D^{0} \to π^{+} π^{-}$ , and $D^{0} \to K^{-} π^{+}$ decays is reported. The $D^{0}$ mesons are required to originat…

hep-ex2018★ 64 cited

Evidence for an $η_{c} (1 S) π^{-}$ resonance in $B^{0} \to η_{c} (1 S) K^{+} π^{-}$ decays

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

A Dalitz plot analysis of $B^{0} \to η_{c} (1 S) K^{+} π^{-}$ decays is performed using data samples of $pp$ collisions collected with the LHCb detector at centre-of-mass energies of $\sqrt{s…

hep-ex2018★ 24 cited

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

LHCb collaboration, R. Aaij, B. Adeva +834

A search for $C P$ violation in $Λ_{b}^{0} \to p K^{-}$ and $Λ_{b}^{0} \to p π^{-}$ decays is presented using a sample of $pp$ collisions collected with the LHCb detector and corresponding to…

hep-ex2018★ 3 cited

Observation of the decay $B_{s}^{0} \to χ_{c 2} K^{+} K^{-}$ in the $φ$ mass region

LHCb collaboration, R. Aaij, B. Adeva +828

The $B_{s}^{0} \to χ_{c 2} K^{+} K^{-}$ decay mode is observed and its branching fraction relative to the corresponding $χ_{c 1}$ decay mode, in a $\pm 15 \textrm{MeV}/c^…

hep-ex2018★ 16 cited

Observation of the decay $Λ_{b}^{0} \to Λ_{c}^{+} p p π^{-}$

LHCb collaboration, R. Aaij, B. Adeva +787

The decay $Λ_{b}^{0} \to Λ_{c}^{+} p p π^{-}$ is observed using $pp$ collision data collected with the LHCb detector at centre-of-mass energies of $s =$ 7 and 8 TeV, corresp…

hep-ex2017

Measurement of $C P$ violation in $B^{0} \to J / ψ K_{S}^{0}$ and $B^{0} \to ψ (2 S) K_{S}^{0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +797

A measurement is presented of decay-time-dependent $C P$ violation in the decays $B^{0} \to J / ψ K_{S}^{0}$ and $B^{0} \to ψ (2 S) K_{S}^{0}$ , where the $J / ψ$ is reco…

hep-ex2017★ 5 cited

First observation of forward $Z \to b b ˉ$ production in $pp$ collisions at $s = 8$ TeV

LHCb collaboration, R. Aaij, B. Adeva +804

The decay $Z \to b b ˉ$ is reconstructed in $pp$ collision data, corresponding to 2 fb $^{- 1}$ of integrated luminosity, collected by the LHCb experiment at a centre-of-…

Observation of two new excited Ξb0​ states decaying to Λb0​K−π+

Angular analysis of the rare decay Bs0​→ϕμ+μ−

First measurement of the CP-violating phase in Bs0​→J/ψ(→e+e−)ϕ decays

Branching fraction measurements of the rare Bs0​→ϕμ+μ− and Bs0​→f2′​(1525)μ+μ− decays

Test of lepton universality in beauty-quark decays

Search for the rare decay B0→J/ψϕ

Searches for 25 rare and forbidden decays of D+ and Ds+​ mesons

First branching fraction measurement of the suppressed decay Ξc0​→π−Λc+​

An investigation of the very rare K+→π+ννˉ decay

Measurement of the Λb0​→J/ψΛ angular distribution and the Λb0​ polarisation in pp collisions

Observation of several sources of CP violation in B+→π+π+π− decays

Observation of new resonances in the Λb0​π+π− system

Amplitude analysis of B±→π±K+K− decays

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

Measurement of CP-violating and mixing-induced observables in Bs0​→ϕγ decays

A search for Ξcc++​→D+pK−π+ decays

Observation of B(s)0​→J/ψpp​ decays and precision measurements of the B(s)0​ masses

Measurement of the charm-mixing parameter yCP​

Evidence for an ηc​(1S)π− resonance in B0→ηc​(1S)K+π− decays

Search for CP violation in Λb0​→pK− and Λb0​→pπ− decays

Observation of the decay Bs0​​→χc2​K+K− in the φ mass region

Observation of the decay Λb0​→Λc+​pp​π−

Measurement of CP violation in B0→J/ψKS0​ and B0→ψ(2S)KS0​ decays

First observation of forward Z→bbˉ production in pp collisions at s​=8 TeV