A. Schopper

activity

20102026

J / ψ p

resonances consistent with pentaquark states in

Λ_{b}^{0} \to J / ψ K^{-} p

decays

1.3k citations · 23.4k across the 497 of their papers we have counts for

collaborators

Showing 2015 · hep-exShow all

30 papers · 2 filters

hep-ex2015★ 493 cited

Angular analysis of the $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity

LHCb collaboration, R. Aaij, C. Abellán Beteta +730

An angular analysis of the $B^{0} \to K^{* 0} (\to K^{+} π^{-}) μ^{+} μ^{-}$ decay is presented. The dataset corresponds to an integrated luminosity of $3.0\,{\mbox{fb}^{…

hep-ex2015★ 8 cited

First observation of the rare $B^{+} \to D^{+} K^{+} π^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +730

The $B^{+} \to D^{+} K^{+} π^{-}$ decay is observed in a data sample corresponding to $3.0 fb^{- 1}$ of $pp$ collision data recorded by the LHCb experiment during 2011 and 201…

hep-ex2015★ 133 cited

Measurement of forward $W$ and $Z$ boson production in $pp$ collisions at $s = 8 Te V$

LHCb collaboration, R. Aaij, C. Abellán Beteta +730

Measurements are presented of electroweak boson production using data from $pp$ collisions at a centre-of-mass energy of $s = 8 Te V$ . The analysis is…

hep-ex2015★ 58 cited

Production of associated $Υ$ and open charm hadrons in $pp$ collisions at $s = 7$ and $8$ TeV via double parton scattering

LHCb collaboration, R. Aaij, C. Abellán Beteta +724

Associated production of bottomonia and open charm hadrons in $pp$ collisions at $s = 7$ and $8$ TeV is observed using data corresponding to an integrated luminosity of 3$fb^{-…

hep-ex2015★ 9 cited

Search for the rare decays $B^{0} \to J / ψ γ$ and $B_{s}^{0} \to J / ψ γ$

LHCb collaboration, R. Aaij, C. Abellán Beteta +725

A search for the rare decay of a $B^{0}$ or $B_{s}^{0}$ meson into the final state $J / ψ γ$ is performed, using data collected by the LHCb experiment in $pp$ collisions at $\sqrt{s}=…

hep-ex2015★ 30 cited

Evidence for the strangeness-changing weak decay $Ξ_{b}^{-} \to Λ_{b}^{0} π^{-}$

LHCb collaboration, R. Aaij, C. Abellán Beteta +724

Using a $pp$ collision data sample corresponding to an integrated luminosity of 3.0~fb $^{- 1}$ , collected by the LHCb detector, we present the first search for the strangeness-chang…

hep-ex2015★ 46 cited

A model-independent confirmation of the $Z (4430)^{-}$ state

LHCb collaboration, R. Aaij, B. Adeva +723

The decay $B^{0} \to ψ (2 S) K^{+} π^{-}$ is analyzed using $3 f b^{- 1}$ of $pp$ collision data collected with the LHCb detector. A model-independent description of the $ψ (2 S) π$ mass spe…

hep-ex2015★ 16 cited

Model-independent measurement of mixing parameters in $D^{0} \to K_{S} π^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +724

The first model-independent measurement of the charm mixing parameters in the decay $D^{0} \to K_{S} π^{+} π^{-}$ is reported, using a sample of $pp$ collision data recorded by the LHCb ex…

hep-ex2015★ 55 cited

Measurement of the forward-backward asymmetry in $Z / γ^{*} \to μ^{+} μ^{-}$ decays and determination of the effective weak mixing angle

LHCb collaboration, R. Aaij, B. Adeva +722

The forward-backward charge asymmetry for the process $q q ˉ \to Z / γ^{*} \to μ^{+} μ^{-}$ is measured as a function of the invariant mass of the dimuon system.…

hep-ex2015★ 99 cited

Measurement of forward $J / ψ$ production cross-sections in $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, B. Adeva +722

The production of $J / ψ$ mesons in proton-proton collisions at a centre-of-mass energy of $s = 13$ TeV is studied with the \lhcb detector. Cross-section measurements are perfor…

hep-ex2015★ 71 cited

First measurement of the differential branching fraction and $C P$ asymmetry of the $B^{\pm} \to π^{\pm} μ^{+} μ^{-}$ decay

LHCb collaboration, R. Aaij, B. Adeva +723

The differential branching fraction with respect to the dimuon invariant mass squared, and the $C P$ asymmetry of the $B^{\pm} \to π^{\pm} μ^{+} μ^{-}$ decay are measured for the first time.…

hep-ex2015★ 26 cited

Measurement of the time-integrated $C P$ asymmetry in $D^{0} \to K_{S}^{0} K_{S}^{0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +722

The time-integrated $C P$ asymmetry in the decay $D^{0} \to K_{S}^{0} K_{S}^{0}$ is measured using $3 f b^{- 1}$ of proton-proton collision data collected by the LHCb experiment at centre-of-ma…

hep-ex2015★ 157 cited

Search for hidden-sector bosons in $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +724

A search is presented for hidden-sector bosons, $χ$ , produced in the decay $B^{0} \to K^{*} (892)^{0} χ$ , with $K^{*} (892)^{0} \to K^{+} π^{-}$ and $χ \to μ^{+} μ^{-}$ . The search is performed u…

hep-ex2015★ 1.3k cited

Observation of $J / ψ p$ resonances consistent with pentaquark states in $Λ_{b}^{0} \to J / ψ K^{-} p$ decays

LHCb collaboration, R. Aaij, B. Adeva +720

Observations of exotic structures in the $J / ψ p$ channel, that we refer to as pentaquark-charmonium states, in $Λ_{b}^{0} \to J / ψ K^{-} p$ decays are presented. The data sample corresponds…

hep-ex2015★ 17 cited

Search for long-lived heavy charged particles using a ring imaging Cherenkov technique at LHCb

LHCb collaboration, R. Aaij, B. Adeva +701

A search is performed for heavy long-lived charged particles using 3.0 fb $^{- 1}$ of pp collisions collected at $s$ = 7 and 8 TeV with the LHCb detector. The search is mainly…

hep-ex2015★ 313 cited

Angular analysis and differential branching fraction of the decay $B_{s}^{0} \to ϕ μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, B. Adeva +722

An angular analysis and a measurement of the differential branching fraction of the decay $B_{s}^{0} \to ϕ μ^{+} μ^{-}$ are presented, using data corresponding to an integrated luminosity of $…

hep-ex2015★ 137 cited

Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $s$ = 7 TeV

LHCb collaboration, R. Aaij, B. Adeva +705

A measurement of the production cross-section for $Z$ bosons that decay to muons is presented. The data were recorded by the LHCb detector during $pp$ collisions at a centre-of-mas…

hep-ex2015★ 117 cited

Search for the $Λ_{b} \to Λ η^{'}$ and $Λ_{b} \to Λ η$ decays with the LHCb detector

LHCb collaboration, R. Aaij, B. Adeva +716

A search is performed for the as yet unobserved baryonic $Λ_{b} \to Λ η^{'}$ and $Λ_{b} \to Λ η$ decays with 3 $f b^{- 1}$ of proton-proton collision data recorded by the…

hep-ex2015★ 178 cited

Search for the decay $B_{s}^{0} \to D^{0} f_{0} (980)$

LHCb collaboration, R. Aaij, B. Adeva +705

A search for $B_{s}^{0} \to D^{0} f_{0} (980)$ decays is performed using $3.0 fb^{- 1}$ of $pp$ collision data recorded by the LHCb experiment during 2011 and 2012. Th…

hep-ex2015★ 50 cited

Amplitude analysis of $B^{0} \to D ˉ^{0} K^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +716

The Dalitz plot distribution of $B^{0} \to D ˉ^{0} K^{+} π^{-}$ decays is studied using a data sample corresponding to $3.0 fb^{- 1}$ of $pp$ collision data recorded by the…

hep-ex2015★ 115 cited

Quantum numbers of the $X (3872)$ state and orbital angular momentum in its $ρ^{0} J ψ$ decay

LHCb collaboration, R. Aaij, C. Abellan Beteta +619

Angular correlations in $B^{+} \to X (3872) K^{+}$ decays, with $X (3872) \to ρ^{0} J / ψ$ , $ρ^{0} \to π^{+} π^{-}$ and $J / ψ \to μ^{+} μ^{-}$ , are used to measure orbital angular momentum contributions and to…

hep-ex2015★ 178 cited

Determination of the quark coupling strength $∣ V_{u b} ∣$ using baryonic decays

LHCb collaboration, R. Aaij, B. Adeva +707

In the Standard Model of particle physics, the strength of the couplings of the $b$ quark to the $u$ and $c$ quarks, $∣ V_{u b} ∣$ and $∣ V_{c b} ∣$ , are governed by the coupling of the…

hep-ex2015★ 51 cited

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

LHCb collaboration, R. Aaij, B. Adeva +704

Measurements are presented of the $C P$ violation observables $S$ and $C$ in the decays of $B^{0}$ and $B^{0}$ mesons to the $J / ψ K_{S}^{0}$ final state. The data sample corresp…

hep-ex2015★ 17 cited

First observation and measurement of the branching fraction for the decay $B_{s}^{0} \to D_{s}^{*\mp} K^{\pm}$

LHCb Collaboration, R. Aaij, B. Adeva +697

The first observation of the $B_{s}^{0} \to D_{s}^{*\mp} K^{\pm}$ decay is reported using 3.0 $f b^{- 1}$ of proton-proton collision data collected by the LHCb experiment. The $D_{s}^{*\mp}$ …

Angular analysis of the B0→K∗0μ+μ− decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity

First observation of the rare B+→D+K+π− decay

Measurement of forward W and Z boson production in pp collisions at s​=8TeV

Production of associated Υ and open charm hadrons in pp collisions at s​=7 and 8TeV via double parton scattering

Search for the rare decays B0→J/ψγ and Bs0​→J/ψγ

Evidence for the strangeness-changing weak decay Ξb−​→Λb0​π−

A model-independent confirmation of the Z(4430)− state

Model-independent measurement of mixing parameters in D0→KS​π+π− decays

Measurement of the forward-backward asymmetry in Z/γ∗→μ+μ− decays and determination of the effective weak mixing angle

Measurement of forward J/ψ production cross-sections in pp collisions at s​=13 TeV

First measurement of the differential branching fraction and CP asymmetry of the B±→π±μ+μ− decay

Measurement of the time-integrated CP asymmetry in D0→KS0​KS0​ decays

Search for hidden-sector bosons in B0→K∗0μ+μ− decays

Observation of J/ψp resonances consistent with pentaquark states in Λb0​→J/ψK−p decays

Search for long-lived heavy charged particles using a ring imaging Cherenkov technique at LHCb

Angular analysis and differential branching fraction of the decay Bs0​→ϕμ+μ−

Measurement of the forward Z boson production cross-section in pp collisions at s​ = 7 TeV

Search for the Λb​→Λη′ and Λb​→Λη decays with the LHCb detector

Search for the decay Bs0​→D0f0​(980)

Amplitude analysis of B0→Dˉ0K+π− decays

Quantum numbers of the X(3872) state and orbital angular momentum in its ρ0Jψ decay

Determination of the quark coupling strength ∣Vub​∣ using baryonic decays

Measurement of CP violation in B0→J/ψKS0​ decays

First observation and measurement of the branching fraction for the decay Bs0​→Ds∗∓​K±

Angular analysis of the $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay using $3\,\mbox{fb}^{-1}$ of integrated luminosity

First observation of the rare $B^{+} \to D^{+} K^{+} π^{-}$ decay

Measurement of forward $W$ and $Z$ boson production in $pp$ collisions at $s = 8 Te V$

Production of associated $Υ$ and open charm hadrons in $pp$ collisions at $s = 7$ and $8$ TeV via double parton scattering

Search for the rare decays $B^{0} \to J / ψ γ$ and $B_{s}^{0} \to J / ψ γ$

Evidence for the strangeness-changing weak decay $Ξ_{b}^{-} \to Λ_{b}^{0} π^{-}$

A model-independent confirmation of the $Z (4430)^{-}$ state

Model-independent measurement of mixing parameters in $D^{0} \to K_{S} π^{+} π^{-}$ decays

Measurement of the forward-backward asymmetry in $Z / γ^{*} \to μ^{+} μ^{-}$ decays and determination of the effective weak mixing angle

Measurement of forward $J / ψ$ production cross-sections in $pp$ collisions at $s = 13$ TeV

First measurement of the differential branching fraction and $C P$ asymmetry of the $B^{\pm} \to π^{\pm} μ^{+} μ^{-}$ decay

Measurement of the time-integrated $C P$ asymmetry in $D^{0} \to K_{S}^{0} K_{S}^{0}$ decays

Search for hidden-sector bosons in $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decays

Observation of $J / ψ p$ resonances consistent with pentaquark states in $Λ_{b}^{0} \to J / ψ K^{-} p$ decays

Angular analysis and differential branching fraction of the decay $B_{s}^{0} \to ϕ μ^{+} μ^{-}$

Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $s$ = 7 TeV

Search for the $Λ_{b} \to Λ η^{'}$ and $Λ_{b} \to Λ η$ decays with the LHCb detector

Search for the decay $B_{s}^{0} \to D^{0} f_{0} (980)$

Amplitude analysis of $B^{0} \to D ˉ^{0} K^{+} π^{-}$ decays

Quantum numbers of the $X (3872)$ state and orbital angular momentum in its $ρ^{0} J ψ$ decay

Determination of the quark coupling strength $∣ V_{u b} ∣$ using baryonic decays

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

First observation and measurement of the branching fraction for the decay $B_{s}^{0} \to D_{s}^{*\mp} K^{\pm}$