J. Lefrancois

activity

19992025

J / ψ p

resonances consistent with pentaquark states in

Λ_{b}^{0} \to J / ψ K^{-} p

decays

1.3k citations · 17.3k across the 227 of their papers we have counts for

collaborators

Showing 2014Show all

21 papers · 1 filter

hep-ex2014★ 25 cited

Measurement of the inelastic $pp$ cross-section at a centre-of-mass energy of $s = 7$ TeV

LHCb collaboration, R. Aaij, B. Adeva +699

The cross-section for inelastic proton-proton collisions, with at least one prompt long-lived charged particle of transverse momentum $p_{T} > 0.2$ GeV/ $c$ in the pseudorapidity…

hep-ex2014★ 24 cited

Study of the rare $B_{s}^{0}$ and $B^{0}$ decays into the $π^{+} π^{-} μ^{+} μ^{-}$ final state

LHCb collaboration, R. Aaij, B. Adeva +699

A search for the rare decays $B_{s}^{0} \to π^{+} π^{-} μ^{+} μ^{-}$ and $B^{0} \to π^{+} π^{-} μ^{+} μ^{-}$ is performed in a data set corresponding to an integrated luminosity of 3.0 fb $^{- 1}$ collected by…

hep-ex2014★ 75 cited

Observation of two new $Ξ_{b}^{-}$ baryon resonances

LHCb collaboration, R. Aaij, B. Adeva +699

Two structures are observed close to the kinematic threshold in the $Ξ_{b}^{0} π^{-}$ mass spectrum in a sample of proton-proton collision data, corresponding to an integrated luminosity…

hep-ex2014★ 81 cited

Measurement of $B_{c}^{+}$ production in proton-proton collisions at $s = 8$ TeV

LHCb collaboration, R. Aaij, B. Adeva +702

Production of $B_{c}^{+}$ mesons in proton-proton collisions at a center-of-mass energy of 8 TeV is studied with data corresponding to an integrated luminosity of $2.0 fb^{- 1}$ r…

hep-ex2014★ 21 cited

Measurement of the Z+b-jet cross-section in pp collisions at $s = 7 Te V$ in the forward region

LHCb collaboration, R. Aaij, B. Adeva +699

The associated production of a Z boson or an off-shell photon $γ^{*}$ with a bottom quark in the forward region is studied using proton-proton collisions at a centre-of-mass energy o…

hep-ex2014★ 54 cited

Measurement of the semileptonic $C P$ asymmetry in $B^{0} - B^{0}$ mixing

LHCb collaboration, R. Aaij, B. Adeva +700

The semileptonic $C P$ asymmetry in $B^{0} - B^{0}$ mixing, $a_{sl}^{d}$ , is measured in proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb$^…

hep-ex2014★ 101 cited

Measurement of the $η_{c} (1 S)$ production cross-section in proton-proton collisions via the decay $η_{c} (1 S) \to p p ˉ$

LHCb collaboration, R. Aaij, C. Abellán Beteta +705

The production of the $η_{c} (1 S)$ state in proton-proton collisions is probed via its decay to the $p p ˉ$ final state with the LHCb detector, in the rapidity range $2.0 < y < 4…

hep-ex2014★ 38 cited

Measurement of the B0bar-B0 and Bsbar-Bs production asymmetries in pp collisions at sqrt(s)=7 TeV

LHCb collaboration, R. Aaij, B. Adeva +700

The B0bar-B0 and Bsbar-Bs production asymmetries, AP(B0) and AP(Bs), are measured by means of a time-dependent analysis of B0 -> J/ψK*0, B0 -> D- pi+ and Bs -> Ds- pi+ decays, usin…

hep-ex2014★ 26 cited

Study of $χ_{b}$ meson production in pp collisions at $s = 7$ and 8TeV and observation of the decay $χ_{b} \to Υ (3 S) γ$

LHCb collaboration, R. Aaij, B. Adeva +698

A study of $χ_{b}$ meson production at LHCb is performed on proton-proton collision data, corresponding to 3.0fb $^{- 1}$ of integrated luminosity collected at centre-of-mass energie…

hep-ex2014★ 50 cited

Observation of the $Λ_{b}^{0} \to J / ψ p π^{-}$ decay

LHCb collaboration, R. Aaij, B. Adeva +702

The first observation of the Cabibbo-suppressed decay $Λ_{b}^{0} \to J / ψ p π^{-}$ is reported using a data sample of proton-proton collisions at 7 and 8 TeV, corresponding to an in…

hep-ex2014★ 130 cited

Dalitz plot analysis of $B_{s}^{0} \to D ˉ^{0} K^{-} π^{+}$ decays

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

The resonant substructure of $B_{s}^{0} \to D ˉ^{0} K^{-} π^{+}$ decays is studied with the Dalitz plot analysis technique. The study is based on a data sample corresponding to a…

hep-ex2014★ 27 cited

Measurement of CP asymmetry in $B_{s}^{0} \to D_{s}^{\mp} K^{\pm}$ decays

LHCb collaboration, R. Aaij, B. Adeva +698

We report on measurements of the time-dependent CP violating observables in $B_{s}^{0} \to D_{s}^{\mp} K^{\pm}$ decays using a dataset corresponding to 1.0 fb $^{- 1}$ of pp collisi…

hep-ex2014★ 19 cited

Measurement of CP violation in $B_{s}^{0} \to ϕϕ$ decays

LHCb collaboration, R. Aaij, B. Adeva +698

A measurement of the decay time dependent CP-violating asymmetry in $B_{s}^{0} \to ϕϕ$ decays is presented, along with measurements of the $T$ -odd triple-product asymmetries. In this d…

hep-ex2014★ 952 cited

Test of lepton universality using $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ decays

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

A measurement of the ratio of the branching fractions of the $B^{+} \to K^{+} μ^{+} μ^{-}$ and $B^{+} \to K^{+} e^{+} e^{-}$ decays is presented using proton-proton colli…

hep-ex2014★ 22 cited

First measurement of the charge asymmetry in beauty-quark pair production at a hadron collider

R. Aaij, B. Adeva, M. Adinolfi +700

The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in $b b ˉ$ pair production…

nucl-ex2014★ 62 cited

Study of $Υ$ production and cold nuclear matter effects in pPb collisions at $s_{N N} = 5 TeV$

LHCb collaboration, R. Aaij, B. Adeva +696

Production of $Υ$ mesons in proton-lead collisions at a nucleon-nucleon centre-of-mass energy $s_{N N} = 5 TeV$ is studied with the LHCb detector. The analysis is base…

hep-ex2014★ 92 cited

Measurement of the resonant and CP components in $B^{0} \to J / ψ π^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +693

The resonant structure of the reaction $B^{0} \to J / ψ π^{+} π^{-}$ is studied using data from 3 fb $^{- 1}$ of integrated luminosity collected by the LHCb experiment, one-t…

hep-ex2014★ 18 cited

Evidence for the decay $B_{c}^{+} \to J / ψ 3 π^{+} 2 π^{-}$

LHCb collaboration, R. Aaij, B. Adeva +686

Evidence is presented for the decay $B_{c} + \to J / ψ 3 π^{+} 2 π^{-}$ using proton-proton collision data, corresponding to an integrated luminosity of 3fb $^{- 1}$ , collected with the LH…

hep-ex2014★ 165 cited

Evidence for the decay $X (3872) \to ψ (2 S) γ$

LHCb collaboration, R. Aaij, B. Adeva +692

Evidence for the decay mode $X (3872) \to ψ (2 S) γ$ in $B^{+} \to X (3872) K^{+}$ decays is found with a significance of 4.4 standard deviations. The analysis is based on a dat…

hep-ex2014★ 42 cited

Searches for $Λ_{b}^{0}$ and $Ξ_{b}^{0}$ decays to $K_{S}^{0} p π^{-}$ and $K_{S}^{0} p K^{-}$ final states with first observation of the $Λ_{b}^{0} \to K_{S}^{0} p π^{-}$ decay

LHCb collaboration, R. Aaij, B. Adeva +671

A search for previously unobserved decays of beauty baryons to the final states $K_{S}^{0} p π^{-}$ and $K_{S}^{0} p K^{-}$ is reported. The…

hep-ex2014★ 159 cited

Updated measurements of exclusive $J / ψ$ and $ψ (2 S)$ production cross-sections in $pp$ collisions at $s = 7$ TeV

LHCb collaboration, R. Aaij, B. Adeva +670

The differential cross-section as a function of rapidity has been measured for the exclusive production of $J / ψ$ and $ψ (2 S)$ mesons in proton-proton collisions at $s = 7$ TeV,…

Measurement of the inelastic pp cross-section at a centre-of-mass energy of s​=7 TeV

Study of the rare Bs0​ and B0 decays into the π+π−μ+μ− final state

Observation of two new Ξb−​ baryon resonances

Measurement of Bc+​ production in proton-proton collisions at s​=8 TeV

Measurement of the Z+b-jet cross-section in pp collisions at s​=7TeV in the forward region

Measurement of the semileptonic CP asymmetry in B0−B0 mixing

Measurement of the ηc​(1S) production cross-section in proton-proton collisions via the decay ηc​(1S)→ppˉ​

Measurement of the B0bar-B0 and Bsbar-Bs production asymmetries in pp collisions at sqrt(s)=7 TeV

Study of χb​ meson production in pp collisions at s​=7 and 8TeV and observation of the decay χb​→Υ(3S)γ

Observation of the Λb0​→J/ψpπ− decay

Dalitz plot analysis of Bs0​→Dˉ0K−π+ decays

Measurement of CP asymmetry in Bs0​→Ds∓​K± decays

Measurement of CP violation in Bs0​→ϕϕ decays

Test of lepton universality using B+→K+ℓ+ℓ− decays

First measurement of the charge asymmetry in beauty-quark pair production at a hadron collider

Study of Υ production and cold nuclear matter effects in pPb collisions at sNN​​=5 TeV

Measurement of the resonant and CP components in B0→J/ψπ+π− decays

Evidence for the decay Bc+​→J/ψ3π+2π−

Evidence for the decay X(3872)→ψ(2S)γ

Searches for Λb0​ and Ξb0​ decays to KS0​pπ− and KS0​pK− final states with first observation of the Λb0​→KS0​pπ− decay

Updated measurements of exclusive J/ψ and ψ(2S) production cross-sections in pp collisions at s​=7 TeV

Measurement of the inelastic $pp$ cross-section at a centre-of-mass energy of $s = 7$ TeV

Study of the rare $B_{s}^{0}$ and $B^{0}$ decays into the $π^{+} π^{-} μ^{+} μ^{-}$ final state

Observation of two new $Ξ_{b}^{-}$ baryon resonances

Measurement of $B_{c}^{+}$ production in proton-proton collisions at $s = 8$ TeV

Measurement of the Z+b-jet cross-section in pp collisions at $s = 7 Te V$ in the forward region

Measurement of the semileptonic $C P$ asymmetry in $B^{0} - B^{0}$ mixing

Measurement of the $η_{c} (1 S)$ production cross-section in proton-proton collisions via the decay $η_{c} (1 S) \to p p ˉ$

Study of $χ_{b}$ meson production in pp collisions at $s = 7$ and 8TeV and observation of the decay $χ_{b} \to Υ (3 S) γ$

Observation of the $Λ_{b}^{0} \to J / ψ p π^{-}$ decay

Dalitz plot analysis of $B_{s}^{0} \to D ˉ^{0} K^{-} π^{+}$ decays

Measurement of CP asymmetry in $B_{s}^{0} \to D_{s}^{\mp} K^{\pm}$ decays

Measurement of CP violation in $B_{s}^{0} \to ϕϕ$ decays

Test of lepton universality using $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ decays

Study of $Υ$ production and cold nuclear matter effects in pPb collisions at $s_{N N} = 5 TeV$

Measurement of the resonant and CP components in $B^{0} \to J / ψ π^{+} π^{-}$ decays

Evidence for the decay $B_{c}^{+} \to J / ψ 3 π^{+} 2 π^{-}$

Evidence for the decay $X (3872) \to ψ (2 S) γ$

Searches for $Λ_{b}^{0}$ and $Ξ_{b}^{0}$ decays to $K_{S}^{0} p π^{-}$ and $K_{S}^{0} p K^{-}$ final states with first observation of the $Λ_{b}^{0} \to K_{S}^{0} p π^{-}$ decay

Updated measurements of exclusive $J / ψ$ and $ψ (2 S)$ production cross-sections in $pp$ collisions at $s = 7$ TeV