C. Gaspar

activity

19992023

J / ψ p

resonances consistent with pentaquark states in

Λ_{b}^{0} \to J / ψ K^{-} p

decays

1.3k citations · 26k across the 398 of their papers we have counts for

collaborators

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398 papers · 1 filter

hep-ex2023★ 2 cited

Measurement of the $Z$ boson production cross-section in $pp$ collisions at $s = 5.02$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1080

The first measurement of the $Z$ boson production cross-section at centre-of-mass energy $s = 5.02$ TeV in the forward region is reported, using $pp$ collision data collect…

hep-ex2023★ 12 cited

Improved measurement of $C P$ violation parameters in $B_{s}^{0} \to J / ψ K^{+} K^{-}$ decays in the vicinity of the $ϕ (1020)$ resonance

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

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

hep-ex2023★ 5 cited

Observation of the decays $B_{(s)}^{0} \to D_{s 1} (2536)^{\mp} K^{\pm}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1088

This paper reports the observation of the decays $B_{(s)}^{0} \to D_{s 1} (2536)^{\mp} K^{\pm}$ using proton-proton collision data collected by the LHCb experiment, corresponding to an…

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-ex2023★ 7 cited

Search for $C P$ violation in the phase space of $D^{0} \to π^{-} π^{+} π^{0}$ decays with the energy test

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1046

A search for $C P$ violation in $D^{0} \to π^{-} π^{+} π^{0}$ decays is reported, using $pp$ collision data collected by the LHCb experiment from 2015 to 2018 corresponding to an integrated l…

hep-ex2023★ 1 cited

Study of the Bose-Einstein correlations of same-sign pions in proton-lead collisions

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1045

Correlations of same-sign charged particles are analysed using proton-lead collision data collected by the LHCb experiment at a nucleon-nucleon centre-of-mass energy of 5.02 TeV, c…

hep-ex2023★ 4 cited

Associated production of prompt $J / ψ$ and $Υ$ mesons in $pp$ collisions at $s = 13 TeV$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1045

The associated production of prompt $J / ψ$ and $Υ$ mesons in $pp$ collisions at a centre-of-mass energy of $s = 13 TeV$ is studied using LHCb data, co…

hep-ex2023★ 4 cited

Measurement of the mass difference and relative production rate of the $Ω_{b}^{-}$ and $Ξ_{b}^{-}$ baryons

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1050

The mass difference between the $Ω_{b}^{-}$ and $Ξ_{b}^{-}$ baryons is measured using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosi…

hep-ex2023★ 5 cited

Measurement of $Ξ_{c}^{+}$ production in $p$ Pb collisions at $s_{N N} = 8.16$ TeV at LHCb

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1048

A study of prompt $Ξ_{c}^{+}$ production in proton-lead collisions is performed with the LHCb experiment at a centre-of-mass energy per nucleon pair of 8.16 TeV in 2016 in $p$ Pb an…

hep-ex2023★ 67 cited

Test of lepton flavour universality using $B^{0} \to D^{*-} τ^{+} ν_{τ}$ decays with hadronic $τ$ channels

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1051

The branching fraction $B (B^{0} \to D^{*-} τ^{+} ν_{τ})$ is measured relative to that of the normalization mode $B^{0} \to D^{*-} π^{+} π^{-} π^{+}$ using hadronic $τ^+ \to π^+π^-π^+(π^0)\o…

hep-ex2023★ 12 cited

Study of charmonium decays to $K_{S}^{0} K π$ in the $B \to (K_{S}^{0} K π) K$ channels

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1049

A study of the $B^{+} \to K_{S}^{0} K^{+} K^{-} π^{+}$ and $B^{+} \to K_{S}^{0} K^{+} K^{+} π^{-}$ decays is performed using proton-proton collisions at center-of-mass energies of 7, 8 and 13 TeV at the LHCb expe…

hep-ex2023★ 10 cited

Precision measurement of $CP$ violation in the penguin-mediated decay $B_{s}^{0} \to ϕϕ$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1044

A flavor-tagged time-dependent angular analysis of the decay $B_{s}^{0} \to ϕϕ$ is performed using $pp$ collision data collected by the LHCb experiment at $s = 13$ TeV, th…

hep-ex2023

Search for $D^{*} (2007)^{0} \to μ^{+} μ^{-}$ in $B^{-} \to π^{-} μ^{+} μ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1047

The very rare $D^{*} (2007)^{0} \to μ^{+} μ^{-}$ decay is searched for by analysing $B^{-} \to π^{-} μ^{+} μ^{-}$ decays. The analysis uses a sample of beauty mesons produced in proton-proton collisions…

hep-ex2023★ 3 cited

Observation of the $B^{+} \to J / ψ η^{'} K^{+}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1049

The $B^{+} \to J / ψ η^{'} K^{+}$ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8,…

hep-ex2023★ 4 cited

Search for $CP$ violation in $D_{(s)}^{+} \to K^{-} K^{+} K^{+}$ decays

LHCb collaboration

A search for direct $CP$ violation in the Cabibbo-suppressed decay $D_{s}^{+} \to K^{-} K^{+} K^{+}$ and in the doubly Cabibbo-suppressed decay $D^{+}\rightarrow K^{-}K^{…

hep-ex2023★ 2 cited

Observation of the $B_{s}^{0} \to χ_{c 1} (3872) π^{+} π^{-}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1045

The first observation of the $B_{s}^{0} \to (χ_{c 1} (3872) \to J / ψ π^{+} π^{-}) π^{+} π^{-}$ decay is reported using proton-proton collision data, corresponding to int…

hep-ex2023★ 72 cited

Measurement of the ratios of branching fractions $R (D^{*})$ and $R (D^{0})$

LHCb Collaboration

The ratios of branching fractions $R (D^{*}) \equiv B (B ˉ \to D^{*} τ^{-} ν ˉ_{τ}) / B (B ˉ \to D^{*} μ^{-} ν ˉ_{μ})$ and $\mathcal{R}(D^{0})\equiv\mathca…

hep-ex2022★ 12 cited

Search for rare decays of $D^{0}$ mesons into two muons

LHCb collaboration

A search for the very rare $D^{0} \to μ^{+} μ^{-}$ decay is performed using data collected by the LHCb experiment in proton-proton collisions at $s = 7$ , 8 and $13 TeV$ , corre…

hep-ex2022★ 112 cited

Measurement of lepton universality parameters in $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1047

A simultaneous analysis of the $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays is performed to test muon-electron universality in two ranges of the square of the di…

hep-ex2022★ 126 cited

Test of lepton universality in $b \to s ℓ^{+} ℓ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1047

The first simultaneous test of muon-electron universality using $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays is performed, in two r…

hep-ex2022★ 80 cited

First observation of a doubly charged tetraquark and its neutral partner

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1055

A combined amplitude analysis is performed for the decays $B^{0} \to D^{0} D_{s}^{+} π^{-}$ and $B^{+} \to D^{-} D_{s}^{+} π^{+}$ , which are related by isospin symmetry. The an…

hep-ex2022★ 17 cited

Open charm production and asymmetry in $p$ Ne collisions at $s_{NN} =$ 68.5 GeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1053

A measurement of $D^{0}$ meson production by the LHCb experiment in its fixed-target configuration is presented. The production of $D^{0}$ mesons is studied with a beam of 2.5 TeV prot…

hep-ex2022★ 40 cited

Observation of a resonant structure near the $D_{s}^{+} D_{s}^{-}$ threshold in the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1048

An amplitude analysis of the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data c…

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…

Measurement of the Z boson production cross-section in pp collisions at s​=5.02 TeV

Improved measurement of CP violation parameters in Bs0​→J/ψK+K− decays in the vicinity of the ϕ(1020) resonance

Observation of the decays B(s)0​→Ds1​(2536)∓K±

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

Search for CP violation in the phase space of D0→π−π+π0 decays with the energy test

Study of the Bose-Einstein correlations of same-sign pions in proton-lead collisions

Associated production of prompt J/ψ and Υ mesons in pp collisions at s​=13TeV

Measurement of the mass difference and relative production rate of the Ωb−​ and Ξb−​ baryons

Measurement of Ξc+​ production in pPb collisions at sNN​​=8.16 TeV at LHCb

Test of lepton flavour universality using B0→D∗−τ+ντ​ decays with hadronic τ channels

Study of charmonium decays to KS0​Kπ in the B→(KS0​Kπ)K channels

Precision measurement of CP violation in the penguin-mediated decay Bs0​→ϕϕ

Search for D∗(2007)0→μ+μ− in B−→π−μ+μ− decays

Observation of the B+→J/ψη′K+ decay

Search for CP violation in D(s)+​→K−K+K+ decays

Observation of the Bs0​→χc1​(3872)π+π− decay

Measurement of the ratios of branching fractions R(D∗) and R(D0)

Search for rare decays of D0 mesons into two muons

Measurement of lepton universality parameters in B+→K+ℓ+ℓ− and B0→K∗0ℓ+ℓ− decays

Test of lepton universality in b→sℓ+ℓ− decays

First observation of a doubly charged tetraquark and its neutral partner

Open charm production and asymmetry in pNe collisions at sNN​​= 68.5 GeV

Observation of a resonant structure near the Ds+​Ds−​ threshold in the B+→Ds+​Ds−​K+ decay

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

Measurement of the $Z$ boson production cross-section in $pp$ collisions at $s = 5.02$ TeV

Improved measurement of $C P$ violation parameters in $B_{s}^{0} \to J / ψ K^{+} K^{-}$ decays in the vicinity of the $ϕ (1020)$ resonance

Observation of the decays $B_{(s)}^{0} \to D_{s 1} (2536)^{\mp} K^{\pm}$

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

Search for $C P$ violation in the phase space of $D^{0} \to π^{-} π^{+} π^{0}$ decays with the energy test

Associated production of prompt $J / ψ$ and $Υ$ mesons in $pp$ collisions at $s = 13 TeV$

Measurement of the mass difference and relative production rate of the $Ω_{b}^{-}$ and $Ξ_{b}^{-}$ baryons

Measurement of $Ξ_{c}^{+}$ production in $p$ Pb collisions at $s_{N N} = 8.16$ TeV at LHCb

Test of lepton flavour universality using $B^{0} \to D^{*-} τ^{+} ν_{τ}$ decays with hadronic $τ$ channels

Study of charmonium decays to $K_{S}^{0} K π$ in the $B \to (K_{S}^{0} K π) K$ channels

Precision measurement of $CP$ violation in the penguin-mediated decay $B_{s}^{0} \to ϕϕ$

Search for $D^{*} (2007)^{0} \to μ^{+} μ^{-}$ in $B^{-} \to π^{-} μ^{+} μ^{-}$ decays

Observation of the $B^{+} \to J / ψ η^{'} K^{+}$ decay

Search for $CP$ violation in $D_{(s)}^{+} \to K^{-} K^{+} K^{+}$ decays

Observation of the $B_{s}^{0} \to χ_{c 1} (3872) π^{+} π^{-}$ decay

Measurement of the ratios of branching fractions $R (D^{*})$ and $R (D^{0})$

Search for rare decays of $D^{0}$ mesons into two muons

Measurement of lepton universality parameters in $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays

Test of lepton universality in $b \to s ℓ^{+} ℓ^{-}$ decays

Open charm production and asymmetry in $p$ Ne collisions at $s_{NN} =$ 68.5 GeV

Observation of a resonant structure near the $D_{s}^{+} D_{s}^{-}$ threshold in the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

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