G. Coombs

activity

20162022

most citedObservation of an exotic narrow doubly charmed tetraquark

403 citations · 2.3k across the 39 of their papers we have counts for

collaborators

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38 papers · 1 filter

hep-ex2022★ 6 cited

Measurement of the $Λ_{c}^{+}$ to $D^{0}$ production cross-section ratio in peripheral PbPb collisions

LHCb collaboration

We report on a measurement of the $Λ_{c}^{+}$ to $D^{0}$ production ratio in PbPb collisions at $s_{NN}$ = 5.02 TeV with the LHCb detector in the forward rapidity region $2 <y<…

hep-ex2022★ 3 cited

Amplitude analysis of the $D^{+} \to π^{-} π^{+} π^{+}$ decay and measurement of the $π^{-} π^{+}$ S-wave amplitude

LHCb Collaboration

An amplitude analysis of the $D^{+} \to π^{-} π^{+} π^{+}$ decay is performed with a sample corresponding to $1.5 f b^{- 1}$ of integrated luminosity of $pp$ collisions at a centre-of-mas…

hep-ex2022★ 36 cited

Study of exclusive photoproduction of charmonium in ultra-peripheral lead-lead collisions

LHCb collaboration

The cross-sections of exclusive (coherent) photoproduction $J / ψ$ and $ψ (2S)$ mesons in ultra-peripheral PbPb collisions at a nucleon-nucleon centre-of-mass energy of $5.02…

hep-ex2022★ 6 cited

Measurement of the $Z$ boson production cross-section in proton-lead collisions at $s_{NN} = 8.16 TeV$

LHCb collaboration

This article presents the first measurement of the differential $Z$ -boson production cross-section in the forward region using proton-lead collisions with the LHCb detector. The da…

hep-ex2022

Measurement of $C P$ asymmetries in $D_{(s)}^{+} \to η π^{+}$ and $D_{(s)}^{+} \to η^{'} π^{+}$ decays

LHCb Collaboration

Searches for $C P$ violation in the decays $D_{(s)}^{+} \to η π^{+}$ and $D_{(s)}^{+} \to η^{'} π^{+}$ are performed using $pp$ collision data corresponding to 6 fb $^{- 1}$ …

hep-ex2021★ 6 cited

Identification of charm jets at LHCb

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +994

The identification of charm jets is achieved at LHCb for data collected in 2015-2018 using a method based on the properties of displaced vertices reconstructed and matched with jet…

hep-ex2021★ 52 cited

Simultaneous determination of CKM angle $γ$ and charm mixing parameters

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +994

A combination of measurements sensitive to the $C P$ violation angle $γ$ of the Cabibbo-Kobayashi-Maskawa unitarity triangle and to the charm mixing parameters that describe oscilla…

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★ 100 cited

Analysis of neutral $B$ -meson decays into two muons

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

Branching fraction and effective lifetime measurements of the rare decay $B_{s}^{0} \to μ^{+} μ^{-}$ and searches for the decays $B^{0} \to μ^{+} μ^{-}$ and $B_{s}^{0} \to μ^{+} μ^{-} γ$ are reported using proton…

hep-ex2021

Measurement of prompt charged-particle production in pp collisions at a centre-of-mass energy of 13 TeV

LHCb collaboration, R. Aaij, C. Abellán Beteta +957

The differential cross-section of prompt inclusive production of long-lived charged particles in proton-proton collisions is measured using a data sample recorded by the LHCb exper…

hep-ex2021★ 8 cited

Measurement of the prompt-production cross-section ratio $σ (χ_{c 2}) / σ (χ_{c 1})$ in $p$ Pb collisions at $s_{N N}$ = 8.16 TeV

R. Aaij, C. Abellán Beteta, T. Ackernley +954

This Letter reports the first measurement of prompt $χ_{c 1}$ and $χ_{c 2}$ charmonium production in nuclear collisions at Large Hadron Collider energies. The cross-section ratio $σ(…

hep-ex2020★ 9 cited

Measurement of the relative branching fractions of $B^{+} \to h^{+} h^{' +} h^{' -}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +957

The relative branching fractions of $B^{+} \to h^{+} h^{' +} h^{' -}$ decays, where $h^{(')}$ is a pion or kaon, are measured. The analysis is performed with a data sample…

hep-ex2020★ 52 cited

Observation of multiplicity-dependent prompt $χ_{c 1} (3872)$ and $ψ (2 S)$ production in $pp$ collisions

LHCb collaboration, R. Aaij, C. Abellán Beteta +968

The production of $χ_{c 1} (3872)$ and $ψ (2 S)$ hadrons is studied as a function of charged particle multiplicity in $pp$ collisions at a center-of-mass energy of 8 TeV, corresponding…

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-ex2020★ 297 cited

Measurement of $C P$ -averaged observables in the $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellán Beteta +902

An angular analysis of the $B^{0} \to K^{* 0} (\to K^{+} π^{-}) μ^{+} μ^{-}$ decay is presented using a data set corresponding to an integrated luminosity of 4.7 fb $^{- 1}$ of $pp…

hep-ex2019★ 68 cited

Observation of several sources of $C P$ violation in $B^{+} \to π^{+} π^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +868

Observations are reported of different sources of $C P$ violation from an amplitude analysis of $B^{+} \to π^{+} π^{+} π^{-}$ decays, based on a data sample corresponding to an integrated l…

hep-ex2019★ 68 cited

Observation of new resonances in the $Λ_{b}^{0} π^{+} π^{-}$ system

LHCb collaboration, R. Aaij, C. Abellán Beteta +910

We report the observation of a new structure in the $Λ_{b}^{0} π^{+} π^{-}$ spectrum using the full LHCb data set of $pp$ collisions, corresponding to an integrated luminosity of $9\,\mathr…

hep-ex2019★ 52 cited

Amplitude analysis of $B^{\pm} \to π^{\pm} K^{+} K^{-}$ decays

LHCb Collaboration, R. Aaij, C. Abellán Beteta +842

The first amplitude analysis of the $B^{\pm} \to π^{\pm} K^{+} K^{-}$ decay is reported based on a data sample corresponding to an integrated luminosity of 3.0 fb $^{- 1}$ of $pp$ collisions…

hep-ex2019★ 29 cited

Measurement of $C P$ -violating and mixing-induced observables in $B_{s}^{0} \to ϕ γ$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +859

A time-dependent analysis of the $B_{s}^{0} \to ϕ γ$ decay rate is performed to determine the $C P$ -violating observables $S_{ϕ γ}$ and $C_{ϕ γ}$ , and the mixing-induced observable $\mathc…

hep-ex2019★ 28 cited

Measurement of charged hadron production in $Z$ -tagged jets in proton-proton collisions at $s = 8$ TeV

LHCb Collaboration, R. Aaij, C. Abellán Beteta +851

The production of charged hadrons within jets recoiling against a $Z$ boson is measured in proton-proton collision data at $s = 8$ TeV recorded by the LHCb experiment. The cha…

hep-ex2019★ 297 cited

Observation of $C P$ violation in charm decays

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

A search for charge-parity ( $C P$ ) violation in $D^{0} \to K^{-} K^{+}$ and $D^{0} \to π^{-} π^{+}$ decays is reported, using $pp$ collision data corresponding to an integrated luminosity of…

hep-ex2019★ 2 cited

Measurements of $C P$ asymmetries in charmless four-body $Λ_{b}$ and $Ξ_{b}^{0}$ decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +841

A search for $C P$ violation in charmless four-body decays of $Λ_{b}$ and $Ξ_{b}^{0}$ baryons with a proton and three charged mesons in the final state is performed. To cancel out product…

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-ex2018★ 76 cited

First measurement of charm production in fixed-target configuration at the LHC

LHCb collaboration, R. Aaij, B. Adeva +834

The first measurement of heavy-flavour production by the LHCb experiment in its fixed-target mode is presented. The production of $J / ψ$ and $D^{0}$ mesons is studied with beams of pr…

Measurement of the Λc+​ to D0 production cross-section ratio in peripheral PbPb collisions

Amplitude analysis of the D+→π−π+π+ decay and measurement of the π−π+ S-wave amplitude

Study of exclusive photoproduction of charmonium in ultra-peripheral lead-lead collisions

Measurement of the Z boson production cross-section in proton-lead collisions at sNN​​=8.16TeV

Measurement of CP asymmetries in D(s)+​→ηπ+ and D(s)+​→η′π+ decays

Identification of charm jets at LHCb

Simultaneous determination of CKM angle γ and charm mixing parameters

Observation of an exotic narrow doubly charmed tetraquark

Analysis of neutral B-meson decays into two muons

Measurement of prompt charged-particle production in pp collisions at a centre-of-mass energy of 13 TeV

Measurement of the prompt-production cross-section ratio σ(χc2​)/σ(χc1​) in pPb collisions at sNN​​ = 8.16 TeV

Measurement of the relative branching fractions of B+→h+h′+h′− decays

Observation of multiplicity-dependent prompt χc1​(3872) and ψ(2S) production in pp collisions

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

Measurement of CP-averaged observables in the B0→K∗0μ+μ− decay

Observation of several sources of CP violation in B+→π+π+π− decays

Observation of new resonances in the Λb0​π+π− system

Amplitude analysis of B±→π±K+K− decays

Measurement of CP-violating and mixing-induced observables in Bs0​→ϕγ decays

Measurement of charged hadron production in Z-tagged jets in proton-proton collisions at s​=8 TeV

Observation of CP violation in charm decays

Measurements of CP asymmetries in charmless four-body Λb​ and Ξb0​ decays

Measurement of b-hadron fractions in 13 TeV pp collisions

First measurement of charm production in fixed-target configuration at the LHC

Measurement of the $Λ_{c}^{+}$ to $D^{0}$ production cross-section ratio in peripheral PbPb collisions

Amplitude analysis of the $D^{+} \to π^{-} π^{+} π^{+}$ decay and measurement of the $π^{-} π^{+}$ S-wave amplitude

Measurement of the $Z$ boson production cross-section in proton-lead collisions at $s_{NN} = 8.16 TeV$

Measurement of $C P$ asymmetries in $D_{(s)}^{+} \to η π^{+}$ and $D_{(s)}^{+} \to η^{'} π^{+}$ decays

Simultaneous determination of CKM angle $γ$ and charm mixing parameters

Analysis of neutral $B$ -meson decays into two muons

Measurement of the prompt-production cross-section ratio $σ (χ_{c 2}) / σ (χ_{c 1})$ in $p$ Pb collisions at $s_{N N}$ = 8.16 TeV

Measurement of the relative branching fractions of $B^{+} \to h^{+} h^{' +} h^{' -}$ decays

Observation of multiplicity-dependent prompt $χ_{c 1} (3872)$ and $ψ (2 S)$ production in $pp$ collisions

Measurement of the $Λ_{b}^{0} \to J / ψ Λ$ angular distribution and the $Λ_{b}^{0}$ polarisation in $pp$ collisions

Measurement of $C P$ -averaged observables in the $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay

Observation of several sources of $C P$ violation in $B^{+} \to π^{+} π^{+} π^{-}$ decays

Observation of new resonances in the $Λ_{b}^{0} π^{+} π^{-}$ system

Amplitude analysis of $B^{\pm} \to π^{\pm} K^{+} K^{-}$ decays

Measurement of $C P$ -violating and mixing-induced observables in $B_{s}^{0} \to ϕ γ$ decays

Measurement of charged hadron production in $Z$ -tagged jets in proton-proton collisions at $s = 8$ TeV

Observation of $C P$ violation in charm decays

Measurements of $C P$ asymmetries in charmless four-body $Λ_{b}$ and $Ξ_{b}^{0}$ decays