R. Kopecna

activity

20172024

most citedObservation of an exotic narrow doubly charmed tetraquark

403 citations · 910 across the 14 of their papers we have counts for

collaborators

14 papers

hep-ex2024★ 8 cited

Search for prompt production of pentaquarks in charm hadron final states

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1093

A search for hidden-charm pentaquark states decaying to a range of $Σ_{c} D ˉ$ and $Λ_{c} D ˉ$ final states, as well as doubly-charmed pentaquark states to $Σ_{c} D$ and $Λ_{c…

hep-ex2023★ 1 cited

Measurement of the CKM angle $γ$ in the $B^{0} \to D K^{* 0}$ channel using self-conjugate $D \to K_{S}^{0} h^{+} h^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1061

A model-independent study of CP violation in $B^{0} \to D K^{* 0}$ decays is presented using data corresponding to an integrated luminosity of 9fb $^{- 1}$ collected by the LHCb experime…

hep-ex2023★ 7 cited

Observation and branching fraction measurement of the decay $Ξ_{b}^{-} \to Λ_{b}^{0} π^{-}$

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

The decay $Ξ_{b}^{-} \to Λ_{b}^{0} π^{-}$ is observed using a proton-proton collision data sample collected at center-of-mass energy $s = 13$ TeV with the LHCb detector, corresponding to a…

hep-ex2022★ 7 cited

Study of the $B^{-} \to Λ_{c}^{+} Λ ˉ_{c}^{-} K^{-}$ decay

LHCb collaboration

The decay $B^{-} \to Λ_{c}^{+} Λ ˉ_{c}^{-} K^{-}$ is studied in proton-proton collisions at a center-of-mass energy of $s = 13$ TeV using data corresponding to an integrated…

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-ex2021★ 200 cited

Observation of new resonances decaying to $J / ψ K^{+}$ and $J / ψ ϕ$

LHCb collaboration, R. Aaij, C. Abellán Beteta +953

The first observation of exotic states with a new quark content $c c ˉ u s ˉ$ decaying to the $J / ψ K^{+}$ final state is reported with high significance from an amplitude anal…

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★ 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★ 15 cited

Search for $C P$ violation in $D_{s}^{+} \to K_{S}^{0} π^{+}$ , $D^{+} \to K_{S}^{0} K^{+}$ and $D^{+} \to ϕ π^{+}$ decays

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

A search for charge-parity ( $C P$ ) violation in Cabibbo-suppressed $D_{s}^{+} \to K_{S}^{0} π^{+}$ , $D^{+} \to K_{S}^{0} K^{+}$ and $D^{+} \to ϕ π^{+}$ decays is reported using proton-proton collision data,…

hep-ex2019★ 114 cited

Measurement of b-hadron fractions in 13 TeV pp collisions

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

The production fractions of $B_{s}^{0}$ and $Λ_{b}^{0}$ hadrons, normalized to the sum of $B^{-}$ and $B^{0}$ fractions, are measured in 13 TeV pp collisions using data c…

hep-ex2017★ 20 cited

Measurements of the branching fractions of $Λ_{c}^{+} \to p π^{-} π^{+}$ , $Λ_{c}^{+} \to p K^{-} K^{+}$ , and $Λ_{c}^{+} \to p π^{-} K^{+}$

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

The ratios of the branching fractions of the decays $Λ_{c}^{+} \to p π^{-} π^{+}$ , $Λ_{c}^{+} \to p K^{-} K^{+}$ , and $Λ_{c}^{+} \to p π^{-} K^{+}$ with res…

hep-ex2017★ 14 cited

First observation of the rare purely baryonic decay $B^{0} \to p p ˉ$

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

The first observation of the decay of a $B^{0}$ meson to a purely baryonic final state, $B^{0} \to p p ˉ$ , is reported. The proton-proton collision data sample used was collected w…

hep-ex2017★ 81 cited

Prompt and nonprompt J/ $ψ$ production and nuclear modification in $p$ Pb collisions at $s_{NN} = 8.16$ TeV

LHCb collaboration, R. Aaij, B. Adeva +806

The production of J/ $ψ$ mesons is studied in proton-lead collisions at the centre-of-mass energy per nucleon pair $s_{NN} = 8.16$ TeV with the LHCb detector at the LHC.…

hep-ex2017★ 13 cited

First observation of a baryonic $B_{s}^{0}$ decay

LHCb collaboration, R. Aaij, B. Adeva +776

We report the first observation of a baryonic $B_{s}^{0}$ decay, $B_{s}^{0} \to p Λ K^{-}$ , using proton-proton collision data recorded by the LHCb experime…

Search for prompt production of pentaquarks in charm hadron final states

Measurement of the CKM angle γ in the B0→DK∗0 channel using self-conjugate D→KS0​h+h− decays

Observation and branching fraction measurement of the decay Ξb−​→Λb0​π−

Study of the B−→Λc+​Λˉc−​K− decay

Observation of an exotic narrow doubly charmed tetraquark

Observation of new resonances decaying to J/ψK+ and J/ψϕ

Search for the rare decay B0→J/ψϕ

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

Search for CP violation in Ds+​→KS0​π+, D+→KS0​K+ and D+→ϕπ+ decays