K. Swientek

activity

20162024

most citedObservation of an exotic narrow doubly charmed tetraquark

403 citations · 1.3k across the 18 of their papers we have counts for

collaborators

18 papers

hep-ex2024★ 2 cited

Measurements of the branching fraction ratio $B (ϕ \to μ^{+} μ^{-}) / B (ϕ \to e^{+} e^{-})$ with charm meson decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1083

Measurements of the branching fraction ratio $B (ϕ \to μ^{+} μ^{-}) / B (ϕ \to e^{+} e^{-})$ with $D_{s}^{+} \to π^{+} ϕ$ and $D^{+} \to π^{+} ϕ$ decays, denoted $R_{ϕ π}^{s}$ an…

hep-ex2023★ 6 cited

Multiplicity dependence of $σ_{ψ (2 S)} / σ_{J / ψ}$ in $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1087

The ratio of production cross-sections of $ψ (2 S)$ over $J / ψ$ mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy $\sqrt{s}=…

hep-ex2022★ 2 cited

Study of $B_{c}^{+}$ meson decays to charmonia plus multihadron final states

LHCb Collaboration, R. Aaij, A. S. W. Abdelmotteleb +1058

Four decay modes of the $B_{c}^{+}$ meson into a $J / ψ$ meson and multiple charged kaons or pions are studied using proton-proton collision data, collected with the~LHCb detector at cen…

hep-ex2022★ 11 cited

Study of charmonium and charmonium-like contributions in $B^{+} \to J / ψ η K^{+}$ decays

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

A study of $B^{+} \to J / ψ η K^{+}$ decays, followed by $J / ψ \to μ^{+} μ^{-}$ and $η \to γ γ$ , is performed using a dataset collected with the LHCb detector in proton-pro…

hep-ex2022★ 74 cited

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

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

The first observation of the semileptonic $b$ -baryon decay $Λ_{b}^{0} \to Λ_{c}^{+} τ^{-} ν_{τ}$ , with a significance of $6.1 σ$ , is reported using a data sample correspondin…

hep-ex2021★ 14 cited

Study of the $B_{c}^{+}$ decays into charmonia and three light hadrons

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +996

Using proton-proton collision data, corresponding to an integrated luminosity of $9 f b^{- 1}$ collected with the LHCb detector, seven decay modes of the $B_{c}^{+}$ meson into a $J / ψ$ or…

hep-ex2021★ 19 cited

Measurement of the photon polarization in $Λ_{b} \to Λ γ$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +994

The photon polarization in $b \to s γ$ transitions is measured for the first time in radiative b-baryon decays exploiting the unique spin structure of $Λ_{b} \to Λ γ$ decays. A data s…

hep-ex2021★ 14 cited

Angular analysis of $D^{0} \to π^{+} π^{-} μ^{+} μ^{-}$ and $D^{0} \to K^{+} K^{-} μ^{+} μ^{-}$ decays and search for $C P$ violation

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1003

The first full angular analysis and an updated measurement of the decay-rate $C P$ asymmetry of the $D^{0} \to π^{+} π^{-} μ^{+} μ^{-}$ and $D^{0} \to K^{+} K^{-} μ^{+} μ^{-}$ decays are reported. The analys…

hep-ex2021★ 94 cited

Tests of lepton universality using $B^{0} \to K_{S}^{0} ℓ^{+} ℓ^{-}$ and $B^{+} \to K^{*+} ℓ^{+} ℓ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +997

Tests of lepton universality in $B^{0} \to K_{S}^{0} ℓ^{+} ℓ^{-}$ and $B^{+} \to K^{*+} ℓ^{+} ℓ^{-}$ decays where $ℓ$ is either an electron or a muon are presented. The differential b…

hep-ex2021★ 52 cited

Simultaneous determination of CKM angle $γ$ and charm mixing parameters

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +994

A combination of measurements sensitive to the $C P$ violation angle $γ$ of the Cabibbo-Kobayashi-Maskawa unitarity triangle and to the charm mixing parameters that describe oscilla…

hep-ex2021★ 10 cited

Observation of the suppressed $Λ_{b}^{0} \to D p K^{-}$ decay with $D \to K^{+} π^{-}$ and measurement of its $C P$ asymmetry

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +997

A study of $Λ_{b}^{0}$ baryon decays to the $D p K^{-}$ final state is presented based on a proton-proton collision data sample corresponding to an integrated luminosity of 9 fb $^{- 1}$ col…

hep-ex2021★ 113 cited

Measurement of the W boson mass

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +994

The $W$ boson mass is measured using proton-proton collision data at $s = 13$ TeV corresponding to an integrated luminosity of 1.7 fb $^{- 1}$ recorded during 2016 by the LHCb e…

hep-ex2021★ 329 cited

Study of the doubly charmed tetraquark $T_{cc}^{+}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +994

An exotic narrow state in the $D^{0} D^{0} π^{+}$ mass spectrum just below the $D^{*+} D^{0}$ mass threshold is studied using a data set corresponding to an integrated luminosity of 9 fb$^{-1…

hep-ex2021★ 403 cited

Observation of an exotic narrow doubly charmed tetraquark

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +994

Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. The observation of a new type of hadronic state, a doubly…

hep-ex2017★ 45 cited

Measurement of the $B^{\pm}$ production cross-section in pp collisions at $s =$ 7 and 13 TeV

LHCb collaboration, R. Aaij, B. Adeva +796

The production of $B^{\pm}$ mesons is studied in $pp$ collisions at centre-of-mass energies of 7 and 13 TeV, using $B^{\pm} \to J / ψ K^{\pm}$ decays and data samples correspon…

hep-ex2017★ 13 cited

Search for baryon-number-violating $Ξ_{b}^{0}$ oscillations

LHCb collaboration, R. Aaij, B. Adeva +802

A search for baryon-number-violating $Ξ_{b}^{0}$ oscillations is performed with a sample of $pp$ collision data recorded by the LHCb experiment, corresponding to an integrated luminosi…

hep-ex2016★ 21 cited

Observation of $B_{c}^{+} \to J / ψ D^{()} K^{()}$ decays

LHCb collaboration, R. Aaij, B. Adeva +764

A search for the decays $B_{c}^{+} \to J / ψ D^{(*) 0} K^{+}$ and $B_{c}^{+} \to J / ψ D^{(*) +} K^{* 0}$ is performed with data collected at the LHCb experiment corresponding to an integrated lumino…

hep-ex2016★ 35 cited

First experimental study of photon polarization in radiative $B_{s}^{0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +765

The polarization of photons produced in radiative $B_{s}^{0}$ decays is studied for the first time. The data are recorded by the LHCb experiment in $pp$ collisions corresponding to…

Measurements of the branching fraction ratio B(ϕ→μ+μ−)/B(ϕ→e+e−) with charm meson decays

Multiplicity dependence of σψ(2S)​/σJ/ψ​ in pp collisions at s​=13 TeV

Study of Bc+​ meson decays to charmonia plus multihadron final states

Study of charmonium and charmonium-like contributions in B+→J/ψηK+ decays

Observation of the decay Λb0​→Λc+​τ−ντ​

Study of the Bc+​ decays into charmonia and three light hadrons

Measurement of the photon polarization in Λb​→Λγ decays

Angular analysis of D0→π+π−μ+μ− and D0→K+K−μ+μ− decays and search for CP violation

Tests of lepton universality using B0→KS0​ℓ+ℓ− and B+→K∗+ℓ+ℓ− decays

Simultaneous determination of CKM angle γ and charm mixing parameters

Observation of the suppressed Λb0​→DpK− decay with D→K+π− and measurement of its CP asymmetry

Measurement of the W boson mass

Study of the doubly charmed tetraquark Tcc+​

Observation of an exotic narrow doubly charmed tetraquark

Measurement of the B± production cross-section in pp collisions at s​= 7 and 13 TeV

Search for baryon-number-violating Ξb0​ oscillations

Observation of Bc+​→J/ψD(∗)K(∗) decays

First experimental study of photon polarization in radiative Bs0​ decays

Measurements of the branching fraction ratio $B (ϕ \to μ^{+} μ^{-}) / B (ϕ \to e^{+} e^{-})$ with charm meson decays

Multiplicity dependence of $σ_{ψ (2 S)} / σ_{J / ψ}$ in $pp$ collisions at $s = 13$ TeV

Study of $B_{c}^{+}$ meson decays to charmonia plus multihadron final states

Study of charmonium and charmonium-like contributions in $B^{+} \to J / ψ η K^{+}$ decays

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

Study of the $B_{c}^{+}$ decays into charmonia and three light hadrons

Measurement of the photon polarization in $Λ_{b} \to Λ γ$ decays

Angular analysis of $D^{0} \to π^{+} π^{-} μ^{+} μ^{-}$ and $D^{0} \to K^{+} K^{-} μ^{+} μ^{-}$ decays and search for $C P$ violation

Tests of lepton universality using $B^{0} \to K_{S}^{0} ℓ^{+} ℓ^{-}$ and $B^{+} \to K^{*+} ℓ^{+} ℓ^{-}$ decays

Simultaneous determination of CKM angle $γ$ and charm mixing parameters

Observation of the suppressed $Λ_{b}^{0} \to D p K^{-}$ decay with $D \to K^{+} π^{-}$ and measurement of its $C P$ asymmetry

Study of the doubly charmed tetraquark $T_{cc}^{+}$

Measurement of the $B^{\pm}$ production cross-section in pp collisions at $s =$ 7 and 13 TeV

Search for baryon-number-violating $Ξ_{b}^{0}$ oscillations

Observation of $B_{c}^{+} \to J / ψ D^{()} K^{()}$ decays

First experimental study of photon polarization in radiative $B_{s}^{0}$ decays