T. Colombo

Three-pion Bose-Einstein correlations measured in proton-proton collisions

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1128

A study on the Bose-Einstein correlations for triplets of same-sign pions is presented. The analysis is performed using proton-proton collisions at a centre-of-mass energy of $\sqr…

Evidence for the decay $B_{s}^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, B. Adeva +788

A search for the decay $B_{s}^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$ is presented using data sets corresponding to 1.0, 2.0 and 1.6 $fb^{- 1}$ of integrated luminosity co…

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

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1119

A measurement of the $C P$ -violating parameters in $B_{s}^{0} \to D_{s}^{\mp} K^{\pm}$ decays is reported, based on the analysis of proton-proton collision data collected by the LHCb expe…

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

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +868

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

Measurement of forward top pair production in the dilepton channel in $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, B. Adeva +791

Forward top quark pair production is studied in $pp$ collisions in the $I^¼ e b$ final state using a data sample corresponding to an integrated luminosity of 1.93 fb $^{- 1}$ collected…

Observation of the doubly-charmed-baryon decay $I^_{cc}^{++} \to I^_{c}^{0} I ¨ ^{+} I ¨ ^{+}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1134

A search for the doubly-charmed-baryon decay $I^_{cc}^{++} \to I^_{c}^{0} I ¨ ^{+} I ¨ ^{+}$ is performed using proton-proton collision data collected by the LHCb experiment at…

Test of lepton flavour universality with $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays at large dilepton invariant mass

LHCb collaboration, R. Aaij, M. Abdelfatah +1115

Muon-electron universality is tested in $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays, in the dilepton-invariant-mass region above the $I ¨ (2 S)$ resonance. The analysis uses beauty mesons…

Search for the rare decay $I^_{c}^{+} \to p I^¼^{+} I^¼^{-}$

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

A search for the flavor-changing neutral-current decay $I^_{c}^{+} \to p I^¼^{+} I^¼^{-}$ is reported using a data set corresponding to an integrated luminosity of $3.0 f b^{- 1}$ collect…

Multiplicity dependence of $I ¨ _{I ¨ (2 S)} / I ¨ _{J / I ¨ }$ in $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1087

The ratio of production cross-sections of $I ¨ (2 S)$ over $J / I ¨ $ mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy $\sqrt{s…

hep-ex2017

Measurement of the $B^{\pm}$ production cross-section in pp collisions at $s =$ 7 and 13 TeV

LHCb collaboration, R. Aaij, B. Adeva +796

The production of $B^{\pm}$ mesons is studied in $pp$ collisions at centre-of-mass energies of 7 and 13 TeV, using $B^{\pm} \to J / I ¨ K^{\pm}$ decays and data samples correspo…

Associated $Z$ + $J / I ¨ $ production as a probe of multiparton interactions in the forward region

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1187

This letter reports a study of associated $Z$ boson and prompt $J / I ¨ $ production in proton-proton collisions at $s = 13$ TeV with the LHCb detector in the forward rapidity reg…

New measurements of $B_{c}^{+}$ decays into single charm final states

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1147

Using proton-proton collision data corresponding to an integrated luminosity of $9 fb^{- 1}$ collected by the LHCb experiment, searches are performed for $B_{c}^{+}$ mesons d…

Observation of the $I^_{b}^{0} \to I ¨ _{c 1} (3872) p K^{-}$ decay

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +903

Using proton-proton collision data, collected with the LHCb detector and corresponding to 1.0, 2.0 and 1.9fb $^{- 1}$ of integrated luminosity at the centre-of-mass energies of 7, 8,…

Enhanced production of $I^_{b}^{0}$ baryons in high-multiplicity $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1085

The production rate of $I^_{b}^{0}$ baryons relative to $B^{0}$ mesons in $pp$ collisions at a center-of-mass energy $s = 13$ TeV is measured by the LHCb experiment. The rat…

First measurement of the $Z \to I^¼^{+} I^¼^{-}$ angular coefficients in the forward region of $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

The first study of the angular distribution of $I^¼^{+} I^¼^{-}$ pairs produced in the forward rapidity region via the Drell-Yan reaction $pp \rightarrow Î³^{*}/Z +X \rightarrow l^+ l^-…

Precision measurement of CP violation and branching fractions in $B^{\pm} \to K_{S}^{0} h^{\pm}$ $(h = I ¨ , K)$ decays and search for the rare decay $B_{c}^{\pm} \to K_{S}^{0} K^{\pm}$

R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta +1177

The decay $B^{\pm} \to K_{S}^{0} I ¨ ^{\pm}$ , with a $C P$ asymmetry expected to be close to zero in the Standard Model, is theoretically clean and sensitive to potential new p…

#average transverse momentum#charged particle production#pp collisions#pPb collisions

Measurement of the photon polarization in $I^_{b} \to I^ I^^{3}$ decays

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

The photon polarization in $b \to s I^^{3}$ transitions is measured for the first time in radiative b-baryon decays exploiting the unique spin structure of $I^_{b} \to I^ I^^{3}$ decays. A da…

hep-ex2021

Measurement of CP violation in the decay $B^{+} \to K^{+} I ¨ ^{0}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +960

A measurement of direct CP violation in the decay $B^{+} \to K^{+} I ¨ ^{0}$ is reported using a data sample corresponding to an integrated luminosity of 5.4 $\textrm{fb}^{-1…

nucl-ex2026

Measurement of the average transverse momentum of forward prompt charged particles in $pp$ and $p Pb$ collisions at $s_{N N} = 5.02 TeV$

LHCb collaboration, R. Aaij, M. Abdelfatah +1106

The paper reports the first measurements of the average transverse momentum of prompt charged particles in pp and pPb collisions at 5.02 TeV, studying its dependence on event multi…

nucl-ex2025

Rapidity and multiplicity dependence of charged-particle flow in $p$ Pb collisions at $s_{N N} = 8.16$ TeV

R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta +1129

The elliptic and triangular flow of charged particles are measured using two-particle angular correlations in $p$ Pb collisions in the pseudorapidity range \cal{2.0 $< ∣ I^\cdot ∣ <$ 4.8}.…

Amplitude analysis of the $I^_{c}^{+} \to p K^{-} I ¨ ^{+}$ decay and $I^_{c}^{+}$ baryon polarization measurement in semileptonic beauty hadron decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

An amplitude analysis of $I^_{c}^{+} \to p K^{-} I ¨ ^{+}$ decays together with a measurement of the $I^_{c}^{+}$ polarization vector in semileptonic beauty hadron decays is presented. A sample of…

Precision measurement of forward $Z$ boson production in proton-proton collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +998

A precision measurement of the $Z$ boson production cross-section at $s = 13$ TeV in the forward region is presented, using $pp$ collision data collected by the LHCb detecto…

Amplitude analysis of $B^{0} \to I^\cdot_{c} (1 S) K^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1185

An amplitude analysis of the $B^{0} \to I^\cdot_{c} (1 S) K^{+} I ¨ ^{-}$ decays with $I^\cdot_{c} (1 S) \to p p ˉ$ is performed using a sample corresponding to an integrated luminosity of…

First evidence for direct CP violation in beauty to charmonium decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1131

The $C P$ asymmetry and branching fraction of the CKM-suppressed decay $B^{+} \to J / I ¨ I ¨ ^{+}$ are precisely measured relative to the favoured decay $B^+\!\to…

Observation of a narrow pentaquark state, $P_{c} (4312)^{+}$ , and of two-peak structure of the $P_{c} (4450)^{+}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +866

A narrow pentaquark state, $P_{c} (4312)^{+}$ , decaying to $J / I ¨ p$ is discovered with a statistical significance of $7.3 I ¨ $ in a data sample of $I^_{b}^{0} \to J / I ¨ p K^{-}$ decays which is a…

Constraints on the CKM angle $I^^{3}$ from $B^{\pm} \to D h^{\pm}$ decays using $D \to h^{\pm} h^{' \mp} I ¨ ^{0}$ final states

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

A data sample collected with the LHCb detector corresponding to an integrated luminosity of 9 fb $^{- 1}$ is used to measure eleven $C P$ violation observables in $B^{\pm} \to D h^{\pm}$ de…

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 / I ¨ $ and $D^{0}$ mesons is studied with beams of p…

First observation of the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

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

The $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay is observed for the first time using proton-proton collision data collected by the LHCb detector at centre-of-mass energies of $7$ , $8$ …

Search for massive long-lived particles decaying semileptonically at sqrt(s)=13 TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +996

A search is performed for massive long-lived particles (LLP) decaying semileptonically into a muon and two quarks. Two kinds of LLP production processes were considered. In the fir…

Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era

LHCb collaboration, I. Bediaga, M. Cruz Torres +828

The LHCb Upgrade II will fully exploit the flavour-physics opportunities of the HL-LHC, and study additional physics topics that take advantage of the forward acceptance of the LHC…

Measurement of the $I^c ◯_{c}^{0}$ and $I^_{c}^{0}$ baryon lifetimes using hadronic $b$ -baryon decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1143

The lifetimes of the $I^c ◯_{c}^{0}$ and $I^_{c}^{0}$ baryons are measured using a $pp$ collision dataset collected by the LHCb experiment, corresponding to an integrated luminosity of $9~\rm…

Measurement of CP violation in the $B_{s}^{0} \to I ¨ I ¨ $ decay and search for the $B^{0} \to I ¨ I ¨ $ decay

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +868

A measurement of the time-dependent CP-violating asymmetry in $B_{s}^{0} \to I ¨ I ¨ $ decays is presented. Using a sample of proton-proton collision data corresponding to an integra…

Measurement of $C P$ violation in $B^{0} \to D^{+} D^{-}$ and $B_{s}^{0} \to D_{s}^{+} D_{s}^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1118

A time-dependent, flavour-tagged measurement of $C P$ violation is performed with $B^{0} \to D^{+} D^{-}$ and $B_{s}^{0} \to D_{s}^{+} D_{s}^{-}$ decays, using data…

nucl-ex2025

Measurement of the $I ¨ (2 S)$ to $J / I ¨ $ cross-section ratio as a function of centrality in PbPb collisions at $s_{NN}$ = 5.02 TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1133

The dissociation of quarkonium states with different binding energies produced in heavy-ion collisions is a powerful probe for investigating the formation and properties of the qua…

$B$ -jet fragmentation with $B^{\pm} \to J / I ¨ K^{\pm}$ decays in $s = 13$ TeV $pp$ collisions at LHCb

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1166

The collinear and transverse-momentum-dependent jet fragmentation function and the radial profile for $B^{\pm}$ mesons in jets are measured. The $B^{\pm}$ mesons are reconstructed…

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 / I ¨ $ meson and multiple charged kaons or pions are studied using proton-proton collision data, collected with the~LHCb detector at ce…

First observation of the $I^_{b}^{0} \to I^_{c}^{+} D_{s}^{-} K^{+} K^{-}$ decay and search for pentaquarks in the $I^_{c}^{+} D_{s}^{-}$ system

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1176

The $I^_{b}^{0} \to I^_{c}^{+} D_{s}^{-} K^{+} K^{-}$ decay is observed for the first time using the data sample from proton-proton collisions recorded at a center…

Observation of an excited $B_{c}^{+}$ state

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +848

Using $pp$ collision data corresponding to an integrated luminosity of $8.5 fb^{- 1}$ recorded by the LHCb experiment at centre-of-mass energies of $s = 7$ , $8$ and…

hep-ex2017

Study of $b b ˉ$ correlations in high energy proton-proton collisions

LHCb collaboration, R. Aaij, B. Adeva +802

Kinematic correlations for pairs of beauty hadrons, produced in high energy proton-proton collisions, are studied. The data sample used was collected with the LHCb experiment at ce…

Measurement of the CKM angle $I^^{3}$ in $B^{\pm} \to D (\to K_{S}^{0} h^{' +} h^{' -}) h^{\pm}$ decays with a novel approach

The BESIII, LHCb Collaborations, : +1903

A measurement of the CKM angle $I^^{3}$ and related strong-phase parameters is performed using a novel, model-independent approach in ${B^{\pm}\rightarrow D(\rightarrow K^{0}_{\rm S} h…

Observation of the decay $I^_{b}^{0} \to I^_{c}^{+} I ¨ ^{-} I^½_{I ¨} $

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +992

The first observation of the semileptonic $b$ -baryon decay $I^_{b}^{0} \to I^_{c}^{+} I ¨ ^{-} I^½_{I ¨} $ , with a significance of $6.1 I ¨ $ , is reported using a data sample corres…

Amplitude analysis of the $B^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1082

An amplitude analysis of the $B^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$ decay is presented using a dataset corresponding to an integrated luminosity of $4.7$ fb $^{- 1}$ of $pp$ collision data collec…

Search for the lepton-flavour violating decays $B^{0} \to K^{* 0} I^¼^{\pm} e^{\mp}$ and $B_{s}^{0} \to I ¨ I^¼^{\pm} e^{\mp}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1003

A search for the lepton-flavour violating decays $B^{0} \to K^{* 0} I^¼^{\pm} e^{\mp}$ and $B_{s}^{0} \to I ¨ I^¼^{\pm} e^{\mp}$ is presented, using proton-proton collision data collected by the LHCb…

Angular analysis of $B^{0} \to K^{* 0} e^{+} e^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1118

An angular analysis of $B^{0} \to K^{* 0} e^{+} e^{-}$ decays is presented using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8…

Measurement of $f_{s} / f_{u}$ variation with proton-proton collision energy and $B$ -meson kinematics

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +903

The ratio of the $B_{s}^{0}$ and $B^{+}$ fragmentation fractions $f_{s}$ and $f_{u}$ is studied with $B_{s}^{0} \to J / I ¨ I ¨ $ and $B^+\to\mathrm…

Measurement of $C P$ observables in the process $B^{0} \to D K^{* 0}$ with two- and four-body $D$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +876

Measurements of $C P$ observables in $B^{0} \to D K^{* 0}$ decays are presented, where $D$ represents a superposition of $D^{0}$ and $D ˉ^{0}$ states. The $D$ meson is reconstructed i…

Measurement of the mass difference and relative production rate of the $I^c ◯_{b}^{-}$ and $I^_{b}^{-}$ baryons

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

The mass difference between the $I^c ◯_{b}^{-}$ and $I^_{b}^{-}$ baryons is measured using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated lumino…

nucl-ex2023

Nuclear modification factor of neutral pions in the forward and backward regions in $p$ -Pb collisions

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

The nuclear modification factor of neutral pions is measured in proton-lead collisions collected at a center-of-mass energy per nucleon of $8.16 TeV$ with the LHCb detector.…

Search for the radiative $I^_{b}^{-} \to I^^{-} I^^{3}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +986

The first search for the rare radiative decay $I^_{b}^{-} \to I^^{-} I^^{3}$ is performed using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy o…

Observation of enhanced double parton scattering in proton-lead collisions at $s_{NN} = 8.16$ TeV

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +992

A study of prompt charm-hadron pair production in proton-lead collisions at $s_{NN} = 8.16$ TeV is performed using data corresponding to an integrated luminosity of ab…

Precision measurement of the $B_{c}^{+}$ meson mass

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +905

A precision measurement of the $B_{c}^{+}$ meson mass is performed using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of $7, 8$ and $1…

Search for $C P$ violation in $D_{s}^{+} \to K_{S}^{0} I ¨ ^{+}$ , $D^{+} \to K_{S}^{0} K^{+}$ and $D^{+} \to I ¨ I ¨ ^{+}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +848

A search for charge-parity ( $C P$ ) violation in Cabibbo-suppressed $D_{s}^{+} \to K_{S}^{0} I ¨ ^{+}$ , $D^{+} \to K_{S}^{0} K^{+}$ and $D^{+} \to I ¨ I ¨ ^{+}$ decays is reported using proton-proton collision dat…

Search for the lepton-flavor violating decay $B_{s}^{0} \to I ¨ I^¼^{\pm} I ¨ ^{\mp}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1065

A search for the lepton-flavor violating decays $B_{s}^{0} \to I ¨ I^¼^{\pm} I ¨ ^{\mp}$ is presented, using a sample of proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV, co…

Observation of strangeness enhancement with charmed mesons in high-multiplicity $p Pb$ collisions at $s_{NN} = 8.16$ TeV

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

The production of prompt $D_{s}^{+}$ and $D^{+}$ mesons is measured by the LHCb experiment in proton-lead ( $p Pb$ ) collisions in both the forward ( $1.5 < y^{*} < 4.0$ ) and backward (…

Measurement of the $I^\cdot_{c} (1 S)$ production cross-section in $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +913

Using a data sample corresponding to an integrated luminosity of $2.0 f b^{- 1}$ , collected by the LHCb experiment, the production of the $I^\cdot_{c} (1 S)$ state in proton-proton collision…

Measurement of the W boson mass

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

The $W$ boson mass is measured using proton-proton collision data at $s = 13$ TeV corresponding to an integrated luminosity of 1.7 fb $^{- 1}$ recorded during 2016 by the LHCb e…

#radiative leptonic B decays#B⁺ meson#B_c⁺ meson#branching fraction limits

Search for the decays $B_{(c)}^{+} \to I^¼^{+} I^½_{I^} ¼ I^^{3}$

LHCb collaboration, R. Aaij, M. Abdelfatah +1128

The LHCb experiment searched for the rare radiative leptonic decays B⁺→μ⁺ν_μγ and B_c⁺→μ⁺ν_μγ in 13 TeV proton‑proton collisions, finding no signal and setting upper limits on thei…

First observation of forward $Z \to b b ˉ$ production in $pp$ collisions at $s = 8$ TeV

LHCb collaboration, R. Aaij, B. Adeva +804

The decay $Z \to b b ˉ$ is reconstructed in $pp$ collision data, corresponding to 2 fb $^{- 1}$ of integrated luminosity, collected by the LHCb experiment at a centre-of-…

hep-ex2021

Observation of new excited $B_{s}^{0}$ states

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +972

A structure is observed in the $B^{+} K^{-}$ mass spectrum in a sample of proton--proton collisions at centre-of-mass energies of 7, 8, and 13 TeV, collected with the LHCb detector and…

First observation of the $I^_{b}^{0} \to D^{+} D^{-} I^$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1072

The $I^_{b}^{0} \to D^{+} D^{-} I^$ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of $13 TeV$ …

Search for beautiful tetraquarks in the $I^¥ (1 S) I^¼ I^¼$ invariant-mass spectrum

LHCb collaboration, R. Aaij, B. Adeva +836

The $I^¥ (1 S) I^¼^{+} I^¼^{-}$ invariant-mass distribution is investigated for a possible exotic meson state composed of two $b$ quarks and two $b$ quarks, $X_{b\overline{b}b\over…

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

LHCb collaboration, R. Aaij, C. AbellÃ¡n 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…

Curvature-bias corrections using a pseudomass method

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1078

Momentum measurements for very high momentum charged particles, such as muons from electroweak vector boson decays, are particularly susceptible to charge-dependent curvature biase…

Observation and branching fraction measurement of the decay $I^_{b}^{-} \to I^_{b}^{0} I ¨ ^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1087

The decay $I^_{b}^{-} \to I^_{b}^{0} I ¨ ^{-}$ is observed using a proton-proton collision data sample collected at center-of-mass energy $s = 13$ TeV with the LHCb detector, corresponding t…

Observation of new $I^_{c}^{0}$ baryons decaying to $I^_{c}^{+} K^{-}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +906

The $I^_{c}^{+} K^{-}$ mass spectrum is studied with a data sample of $pp$ collisions at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6 fb $^{- 1}$ colle…

Measurement of the CKM angle $I^^{3}$ in the $B^{0} \to D K^{* 0}$ channel using self-conjugate $D \to K_{S}^{0} h^{+} h^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1061

A model-independent study of CP violation in $B^{0} \to D K^{* 0}$ decays is presented using data corresponding to an integrated luminosity of 9fb $^{- 1}$ collected by the LHCb experime…

Search for $B_{c}^{+} \to I ¨ ^{+} I^¼^{+} I^¼^{-}$ decays and measurement of the branching fraction ratio $B (B_{c}^{+} \to I ¨ (2 S) I ¨ ^{+}) / B (B_{c}^{+} \to J / I ¨ I ¨ ^{+})$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1078

The first search for nonresonant $B_{c}^{+} \to I ¨ ^{+} I^¼^{+} I^¼^{-}$ decays is reported. The analysis uses proton-proton collision data collected with the LHCb detector between 2011 and 2018, c…

Observation of the decay $I^_{b}^{0} \to I^_{c}^{+} p p I ¨ ^{-}$

LHCb collaboration, R. Aaij, B. Adeva +787

The decay $I^_{b}^{0} \to I^_{c}^{+} p p I ¨ ^{-}$ is observed using $pp$ collision data collected with the LHCb detector at centre-of-mass energies of $s =$ 7 and 8 TeV, corr…

Search for $D^{0}$ meson decays to $I ¨ ^{+} I ¨ ^{-} e^{+} e^{-}$ and $K^{+} K^{-} e^{+} e^{-}$ final states

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1130

A search for $D^{0}$ meson decays to the $I ¨ ^{+} I ¨ ^{-} e^{+} e^{-}$ and $K^{+} K^{-} e^{+} e^{-}$ final states is reported using a sample of proton-proton collisions collected by the LHCb experiment at a…

Search for the decay $B^{0} \to I ¨ I ¨ $

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1160

A search for the decay $B^{0} \to I ¨ I ¨ $ is made using $pp$ collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an…

Measurement of the $C P$ asymmetry in $B^{-} \to D_{s}^{-} D^{0}$ and $B^{-} \to D^{-} D^{0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +787

The $C P$ asymmetry in $B^{-} \to D_{s}^{-} D^{0}$ and $B^{-} \to D^{-} D^{0}$ decays is measured using LHCb data corresponding to an integrated luminosity of 3.0 fb $^{- 1}$ , collected in $pp$ collisi…

Search for $I ¨ ^{-} \to I^¼^{-} I^¼^{+} I^¼^{-}$ decays at the LHCb experiment with Run 2 data

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1188

A search for the lepton-flavour-violating decay $I ¨ ^{-} \to I^¼^{-} I^¼^{+} I^¼^{-}$ is carried out using data collected by the LHCb experiment between 2016 and 2018 in proton-proton collisions…

Observation of $I^_{b}^{0} \to D^{+} p I ¨ ^{-} I ¨ ^{-}$ and $I^_{b}^{0} \to D^{*+} p I ¨ ^{-} I ¨ ^{-}$ decays

R. Aaij, A. S. W. Abdelmotteleb, C. AbellÃ¡n Beteta +995

The multihadron decays $I^_{b}^{0} \to D^{+} p I ¨ ^{-} I ¨ ^{-}$ and $I^_{b}^{0} \to D^{*+} p I ¨ ^{-} I ¨ ^{-}$ are observed in data corresponding to an integrated luminosity of 3fb $^{- 1}$ , co…

Search for the rare decay $B^{+} \to I^¼^{+} I^¼^{-} I^¼^{+} I^½_{I^¼}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +844

A search for the rare leptonic decay $B^{+} \to I^¼^{+} I^¼^{-} I^¼^{+} I^½_{I^¼}$ is performed using proton-proton collision data corresponding to an integrated luminosity of $4.7…

Search for charge-parity violation in semileptonically tagged $D^{0} \to K^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1132

An analysis of the flavour oscillations of the charmed neutral meson is presented. The ratio of $D^{0} \to K^{+} I ¨ ^{-}$ and $D^{0} \to K^{-} I ¨ ^{+}$ decay rates is measured as a f…

First observation of $B^{+} \to D_{s}^{+} K^{+} K^{-}$ decays and a search for $B^{+} \to D_{s}^{+} I ¨ $ decays

LHCb collaboration, R. Aaij, B. Adeva +797

A search for $B^{+} \to D_{s}^{+} K^{+} K^{-}$ decays is performed using $pp$ collision data corresponding to an integrated luminosity of 4.8 fb $^{- 1}$ , collected at centre-of-mass ene…

Constraints on the photon polarisation in $b \to s I^^{3}$ transitions using $B_{s}^{0} \to I ¨ e^{+} e^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1124

An angular analysis of the $B_{s}^{0} \to I ¨ e^{+} e^{-}$ decay is performed using the proton-proton collision dataset collected between 2011 and 2018 by the LHCb experiment, corresp…

Evidence for modification of $b$ quark hadronization in high-multiplicity $pp$ collisions at $s = 13$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +999

The production rate of $B_{s}^{0}$ mesons relative to $B^{0}$ mesons is measured by the LHCb experiment in $pp$ collisions at a center-of-mass energy $s = 13$ TeV over the f…

hep-ex2021

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

R. Aaij, C. AbellÃ¡n Beteta, T. Ackernley +954

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

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…

Search for $D^{*} (2007)^{0} \to I^¼^{+} I^¼^{-}$ in $B^{-} \to I ¨ ^{-} I^¼^{+} I^¼^{-}$ decays

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

The very rare $D^{*} (2007)^{0} \to I^¼^{+} I^¼^{-}$ decay is searched for by analysing $B^{-} \to I ¨ ^{-} I^¼^{+} I^¼^{-}$ decays. The analysis uses a sample of beauty mesons produced in proton-proton colli…

Measurement of the $B_{s}^{0} \to I^¼^{+} I^¼^{-}$ decay properties and search for the $B^{0} \to I^¼^{+} I^¼^{-}$ and $B_{s}^{0} \to I^¼^{+} I^¼^{-} I^^{3}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +953

An improved measurement of the decay $B_{s}^{0} \to I^¼^{+} I^¼^{-}$ and searches for the decays $B^{0} \to I^¼^{+} I^¼^{-}$ and $B_{s}^{0} \to I^¼^{+} I^¼^{-} I^^{3}$ are performed at the LHCb experiment using data collec…

Updated measurement of time-dependent $C P$ -violating observables in $B_{s}^{0} \to J / I ¨ K^{+} K^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +910

The decay-time-dependent $C P$ asymmetry in $B_{s}^{0} \to J / I ¨ K^{+} K^{-}$ decays is measured using proton-proton collision data, corresponding to an integrated luminosity of $1.9\,…

Study of light-meson resonances decaying to $K_{S}^{0} K I ¨ $ in the $B \to (K_{S}^{0} K I ¨ ) K$ channels

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1132

A study is presented of $B^{+} \to K_{S}^{0} K^{-} I ¨ ^{+} K^{-}$ and $B^{+} \to K_{S}^{0} K^{+} I ¨ ^{-} K^{+}$ decays based on the analysis of proton-proton collision data collected with the LH…

Measurements of the branching fractions of $I^_{c}^{+} \to p I ¨ ^{-} I ¨ ^{+}$ , $I^_{c}^{+} \to p K^{-} K^{+}$ , and $I^_{c}^{+} \to p I ¨ ^{-} K^{+}$

LHCb collaboration, R. Aaij, B. Adeva +804

The ratios of the branching fractions of the decays $I^_{c}^{+} \to p I ¨ ^{-} I ¨ ^{+}$ , $I^_{c}^{+} \to p K^{-} K^{+}$ , and $I^_{c}^{+} \to p I ¨ ^{-} K^{+}$ wi…

Search for lepton-universality violation in $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ decays

LHCb Collaboration, R. Aaij, C. AbellÃ¡n Beteta +846

A measurement of the ratio of branching fractions of the decays $B^{+} \to K^{+} I^¼^{+} I^¼^{-}$ and $B^{+} \to K^{+} e^{+} e^{-}$ is presented. The proton-proton collision data used correspond to an int…

Study of the rare decay $J / I ¨ \to I^¼^{+} I^¼^{-} I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1099

The rare electromagnetic $J / I ¨ \to I^¼^{+} I^¼^{-} I^¼^{+} I^¼^{-}$ decay is observed with a significance greatly exceeding the discovery threshold, using proton-proton collision data collected by…

nucl-ex2025

Production of $I^\cdot$ and $I^\cdot^{'}$ mesons in $pp$ and $p$ Pb collisions

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

The production of $I^\cdot$ and $I^\cdot^{'}$ mesons is studied in proton-proton and proton-lead collisions collected with the LHCb detector. Proton-proton collisions are studied at center-of-m…

Measurement of the ratio of branching fractions $B (B_{c}^{+} \to B_{s}^{0} I ¨ ^{+}) / B (B_{c}^{+} \to J / I ¨ I ¨ ^{+})$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1054

The ratio of branching fractions of $B_{c}^{+} \to B_{s}^{0} I ¨ ^{+}$ and $B_{c}^{+} \to J / I ¨ I ¨ ^{+}$ decays is measured with proton-proton collision data of a centre-of-mass energy of $13\text{TeV}…

Study of $I^¥$ production in $p$ Pb collisions at $s_{N N} = 8.16$ TeV

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +840

The production of $I^¥ (n S)$ mesons ( $n = 1, 2, 3$ ) in $p$ Pb and Pb $p$ collisions at a centre-of-mass energy per nucleon pair $s_{N N} = 8.16$ TeV is measured by the LHCb experiment,…

nucl-ex2021

Centrality determination in heavy-ion collisions with the LHCb detector

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +942

The centrality of heavy-ion collisions is directly related to the medium created therein. A procedure to determine the centrality of collisions with the LHCb detector is implemente…

First observation of $C P$ violation and measurement of polarization in $B^{+} \to I ¨ (770)^{0} K^{*} (892)^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1183

An amplitude analysis of the $B^{+} \to (I ¨ ^{+} I ¨ ^{-}) (K_{S}^{0} I ¨ ^{+})$ decay is performed in the mass regions $0.30 < m_{I ¨ ^{+} I ¨ ^{-}} < 1.10 GeV / c^{2}$ and $0.75 < m_{K^0_{\mat…

Isospin amplitudes in $I^_{b}^{0} \to J / I ¨ I^ (I^£^{0})$ and $I^_{b}^{0} \to J / I ¨ I^^{0} (I^)$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +902

Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions, and allow searches for physics beyond the Standard Model. We…

Measurement of the charm-mixing parameter $y_{C P}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +841

A measurement of the charm-mixing parameter $y_{C P}$ using $D^{0} \to K^{+} K^{-}$ , $D^{0} \to I ¨ ^{+} I ¨ ^{-}$ , and $D^{0} \to K^{-} I ¨ ^{+}$ decays is reported. The $D^{0}$ mesons are required to origi…

The LHCb upgrade I

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1305

The LHCb upgrade represents a major change of the experiment. The detectors have been almost completely renewed to allow running at an instantaneous luminosity five times larger th…

Observation of the $B^{0} \to D^{* 0} K^{+} I ¨ ^{-}$ and $B_{s}^{0} \to D^{* 0} K^{-} I ¨ ^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +988

The first observations of $B^{0} \to D^{*} (2007)^{0} K^{+} I ¨ ^{-}$ and $B_{s}^{0} \to D^{*} (2007)^{0} K^{-} I ¨ ^{+}$ decays are presented, and their branchin…

Measurement of the $W \to I^¼ I^½_{I^} ¼$ cross-sections as a function of the muon transverse momentum in $pp$ collisions at 5.02 TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1186

The $pp \to W^{\pm} (\to I^¼^{\pm} I^½_{I^} ¼) X$ cross-sections are measured at a proton-proton centre-of-mass energy $s = 5.02$ TeV using a dataset corresponding to an integrate…

Measurement of $C P$ asymmetry in $D^{0} \to K_{S}^{0} K_{S}^{0}$ decays with Run 3 data

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1189

A measurement of $C P$ asymmetry in $D^{0} \to K_{S}^{0} K_{S}^{0}$ decays is reported, based on a data sample of proton-proton collisions collected with the LHCb detector in 20…

Search for $C P$ violation and observation of $P$ violation in $I^_{b}^{0} \to p I ¨ ^{-} I ¨ ^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +902

A search for $C P$ violation in the $I^_{b}^{0} \to p I ¨ ^{-} I ¨ ^{+} I ¨ ^{-}$ decay is performed using LHCb data corresponding to an integrated luminosity of 6.6 $f b^{- 1}$ collected in $pp$ …