Daniel Johnson

activity

19942022

most citedObservation of CP violation in the B^0 meson system

562 citations · 2.6k across the 40 of their papers we have counts for

collaborators

40 papers

hep-ex2022

The Road Ahead for CODEX-b

Giulio Aielli, Juliette Alimena, James Beacham +36

In this Snowmass contribution we present a comprehensive status update on the progress and plans for the proposed CODEX-b detector, intended to search for long-lived particles beyo…

hep-ex2021★ 9 cited

Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider

Juliette Alimena, James Beacham, Freya Blekman +75

Long-lived particles (LLPs) are highly motivated signals of physics Beyond the Standard Model (BSM) with great discovery potential and unique experimental challenges. The LLP searc…

hep-ex2018★ 82 cited

Central exclusive production of $J / ψ$ and $ψ (2 S)$ mesons in $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, B. Adeva +808

Measurements are reported of the central exclusive production of \jpsi and \psitwos mesons in $pp$ collisions at a centre-of-mass energy of 13 TeV. Backgrounds are significantly re…

hep-ex2017★ 24 cited

Search for excited $B_{c}^{+}$ states

LHCb collaboration, R. Aaij, B. Adeva +792

A search is performed in the invariant mass spectrum of the $B_{c}^{+} π^{+} π^{-}$ system for the excited $B_{c}^{+}$ states $B_{c} (2^{1} S_{0})^{+}$ and $B_{c} (2^{3} S_{1})^{+}$ using a data sam…

hep-ex2017★ 29 cited

Improved limit on the branching fraction of the rare decay $K_{S}^{0} \to μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, B. Adeva +767

A search for the decay $K_{S}^{0} \to μ^{+} μ^{-}$ is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb$^{-1…

hep-ex2017★ 14 cited

Observation of charmless baryonic decays $B_{(s)}^{0} \to p p h^{+} h^{' -}$

LHCb collaboration, R. Aaij, B. Adeva +770

Decays of $B^{0}$ and $B_{s}^{0}$ mesons to the charmless baryonic final states $p p h^{+} h^{' -}$ , where $h$ and $h^{'}$ each denote a kaon or a pion, are searched fo…

hep-ex2017★ 94 cited

Search for the decays $B_{s}^{0} \to τ^{+} τ^{-}$ and $B^{0} \to τ^{+} τ^{-}$

LHCb collaboration, R. Aaij, B. Adeva +775

A search for the rare decays $B_{s}^{0} \to τ^{+} τ^{-}$ and $B^{0} \to τ^{+} τ^{-}$ is performed using proton--proton collision data collected with the LHCb detector. The data sample corresponds to a…

hep-ex2016★ 15 cited

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

LHCb collaboration, R. Aaij, B. Adeva +769

A search for time-integrated $C P$ violation in the Cabibbo-suppressed decay $\mbox{$D^0\rightarrowπ^+π^-π^+π^-$}$ is performed using an unbinned, model-independent technique known…

hep-ex2016★ 41 cited

Search for the lepton-flavour violating decay $D^{0} \to e^{\pm} μ^{\mp}$

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

A search for the lepton-flavour violating decay $D^{0} \to e^{\pm} μ^{\mp}$ is made with a dataset corresponding to an integrated luminosity of 3.0 fb $^{- 1}$ of proton-proton collisions…

hep-ex2016★ 11 cited

Observation of the $B_{s}^{0} \to J / ψ ϕϕ$ decay

LHCb collaboration, R. Aaij, B. Adeva +721

The $B_{s}^{0} \to J / ψ ϕϕ$ decay is observed in $pp$ collision data corresponding to an integrated luminosity of 3 fb $^{- 1}$ recorded by the LHCb detector at centre-of-mass ener…

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★ 33 cited

Studies of the resonance structure in $D^{0} \to K_{S}^{0} K^{\pm} π^{\mp}$ decays

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

Amplitude models are applied to studies of resonance structure in $D^{0} \to K_{S}^{0} K^{-} π^{+}$ and $D^{0} \to K_{S}^{0} K^{+} π^{-}$ decays using $pp$ collision data corresponding to an integrated…

hep-ex2015★ 27 cited

Measurement of $C P$ violation parameters and polarisation fractions in $B_{s}^{0} \to J / ψ K^{* 0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +721

The first measurement of $C P$ asymmetries in the decay $B_{s}^{0} \to J / ψ K^{*} (892)^{0}$ and an updated measurement of its branching fraction and polarisation fractions…

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 $D_{s}^{*\mp}$ …

hep-ex2015★ 38 cited

Measurement of indirect $C P$ asymmetries in $D^{0} \to K^{-} K^{+}$ and $D^{0} \to π^{-} π^{+}$ decays using semileptonic $B$ decays

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

Time-dependent $C P$ asymmetries in the decay rates of the singly Cabibbo-suppressed decays $D^{0} \to K^{-} K^{+}$ and $D^{0} \to π^{-} π^{+}$ are measured in $pp$ collision data c…

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★ 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★ 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…

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★ 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★ 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,…

hep-ex2013★ 12 cited

Measurement of the charge asymmetry in $B^{\pm} \to ϕ K^{\pm}$ and search for $B^{\pm} \to ϕ π^{\pm}$ decays

LHCb collaboration, R. Aaij, B. Adeva +655

The \CP-violating charge asymmetry in $B^{\pm} \to ϕ K^{\pm}$ decays is measured in a sample of $pp$ collisions at 7 TeV centre-of-mass energy, corresponding to an integrated…

The Road Ahead for CODEX-b

Review of opportunities for new long-lived particle triggers in Run 3 of the Large Hadron Collider

Central exclusive production of J/ψ and ψ(2S) mesons in pp collisions at s​=13 TeV

Search for excited Bc+​ states

Improved limit on the branching fraction of the rare decay KS0​→μ+μ−

Observation of charmless baryonic decays B(s)0​→pp​h+h′−

Search for the decays Bs0​→τ+τ− and B0→τ+τ−

Search for CP violation in the phase space of D0→π+π−π+π− decays

Search for the lepton-flavour violating decay D0→e±μ∓

Observation of the Bs0​→J/ψϕϕ decay

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

Studies of the resonance structure in D0→KS0​K±π∓ decays

Measurement of CP violation parameters and polarisation fractions in Bs0​→J/ψK∗0 decays

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

Measurement of indirect CP asymmetries in D0→K−K+ and D0→π−π+ decays using semileptonic B decays

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

Observation of the Λb0​→J/ψpπ− decay

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

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 X(3872)→ψ(2S)γ

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

Measurement of the charge asymmetry in B±→ϕK± and search for B±→ϕπ± decays