F. Paciolla

Inclusive $B$ -meson flavour-tagging algorithm at LHCb

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1179

A new algorithm is developed to identify the flavour of neutral $B$ mesons at production in $pp$ collisions by utilising all tracks from the hadronisation process. The algorithm is…

Machine learning techniques for jet reconstruction at LHCb and application to the search for $H \to b b ˉ$ and $H \to c c ˉ$ in $s = 13$ TeV $pp$ collisions

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1194

Two machine learning techniques for jet measurements at the LHCb experiment are presented: a regression-based method for jet-energy calibration and a deep neural network algorithm…

Observation of orbitally excited $B_{c}^{+}$ states

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1155

The observation of a wide peaking structure in the $B_{c}^{+} I^^{3}$ mass spectrum is reported using proton-proton collision data collected by the LHCb detector at center-of-mass ener…

First measurement of $b$ -jet mass with and without grooming

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1138

The LHCb collaboration presents a novel suite of heavy-flavour jet substructure measurements at forward rapidity in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}…

Measurement of transverse $I^$ and $I^ˉ $ hyperon polarization in $p$ Pb collisions at $s_{N N} = 5.02$ TeV

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

The transverse polarization of $I^$ and $I^ˉ $ hyperons is measured in $p$ Pb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of $5.02$ TeV.…

Study of nuclear effects on charm production in light-ion collisions

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

The onset of nuclear effects in light-ion collisions is studied by measuring the ratio of $D^{0}$ meson production between NeNe and OO collisions at a center-of-mass energy per nucle…

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…

Measurement of $C P$ violation observables in $D^{+} \to K^{-} K^{+} I ¨ ^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1112

A search for violation of the charge-parity $C P$ symmetry in the $D^{+} \to K^{-} K^{+} I ¨ ^{+}$ decay is presented, with proton-proton collision data corresponding to an integrated…

Test of lepton flavour universality with $B^{+} \to K^{+} I ¨ ^{+} I ¨ ^{-} ℓ^{+} ℓ^{-}$ decays

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

The first test of lepton flavor universality between muons and electrons using $B^{+} \to K^{+} I ¨ ^{+} I ¨ ^{-} ℓ^{+} ℓ^{-}$ ( $ℓ = e, I^¼$ ) decays is presented. The measurement is performed wit…

First evidence of $C P$ violation in beauty baryon to charmonium decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1178

A study of the difference in the $C P$ asymmetries between $I^_{b}^{0} \to J / I ¨ p I ¨ ^{-}$ and $I^_{b}^{0} \to J / I ¨ p K^{-}$ decays, $I^ A_{C P}$ , is performed using proto…

Observation of the open-charm tetraquark candidate $T_{cs 0}^{*} (2870)^{0}$ in the $B^{-} \to D^{-} D^{0} K_{S}^{0}$ decay

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

An amplitude analysis of $B^{-} \to D^{-} D^{0} K_{S}^{0}$ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of $9\,\text{fb}^…

Angular analysis of the decay $B_{s}^{0} \to I ¨ e^{+} e^{-}$

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

An angular analysis of the decay $B_{s}^{0} \to I ¨ e^{+} e^{-}$ is presented, using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass energi…

First observation of the charmless baryonic decay $B^{+} \to I^ˉ p p ˉ p$

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

A search for the charmless baryonic decay $B^{+} \to I^ˉ p p ˉ p$ is performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated…

Study of the $B^{0} \to I^_{c}^{+} I^ˉ _{c}^{-} K_{S}^{0}$ decay

LHCb collaboration, R. Aaij, M. Abdelfatah +1113

The decay $B^{0} \to I^_{c}^{+} I^ˉ _{c}^{-} K_{S}^{0}$ is studied at LHCb for the first time using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of $…

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…

Study of $D_{s 1} (2460)^{+} \to D_{s}^{+} I ¨ ^{+} I ¨ ^{-}$ in $B \to D ˉ^{(*)} D_{s}^{+} I ¨ ^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1129

An amplitude analysis of the $D_{s 1} (2460)^{+} \to D_{s}^{+} I ¨ ^{+} I ¨ ^{-}$ transition is performed simultaneously in $B^{0} \to D^{-} D_{s}^{+} I ¨ ^{+} I ¨ ^{-}$ , $B^{+}\to{\bar{D}}^{0} D_{s}…

First evidence of the decay $B^{+} \to I ¨ ^{+} e^{+} e^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1182

The first evidence for the decay $B^{+} \to I ¨ ^{+} e^{+} e^{-}$ is reported using proton-proton collision data recorded by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV,…

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…

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

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

An analysis of the $B^{0} \to K^{* 0} (\to K^{+} I ¨ ^{-}) I^¼^{+} I^¼^{-}$ decay is presented using proton-proton collision data collected by the LHCb experiment, corresponding to an i…

Improved branching-fraction measurements of $B_{(s)}^{0} \to K_{S}^{0} h^{+} h^{^{'} -}$ decays and first observation of $B_{s}^{0} \to K_{S}^{0} K^{+} K^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1123

This paper presents a study of the charmless three-body decays $B_{(s)}^{0} \to K_{S}^{0} h^{+} h^{' -}$ (where $h^{(')} = I ¨ , K$ ), using a sample of $pp$ collision…

Precision measurement of the $I^_{b}^{0}$ baryon lifetime

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

A sample of $pp$ collision data, corresponding to an integrated luminosity of 5.4 fb $^{- 1}$ and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of t…

First determination of the spin-parity of $I^_{c} (3055)^{+, 0}$ baryons

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1112

The $I^_{b}^{0 (-)} \to I^_{c} (3055)^{+ (0)} (\to D^{+ (0)} I^) I ¨ ^{-}$ decay chains are observed, and the spin-parity of $I^_{c} (3055)^{+ (0)}$ baryons is determined for the first time.…

Searches for $B^{0} \to K^{+} I ¨ ^{-} I ¨ ^{+} I ¨ ^{-}$ and $B_{s}^{0} \to K^{+} K^{-} I ¨ ^{+} I ¨ ^{-}$ decays

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

The first searches for $B^{0} \to K^{+} I ¨ ^{-} I ¨ ^{+} I ¨ ^{-}$ and $B_{s}^{0} \to K^{+} K^{-} I ¨ ^{+} I ¨ ^{-}$ decays at the LHCb experiment are conducted with $pp$ collision data corresponding to an integrated lu…

A model-independent measurement of the CKM angle $I^^{3}$ in the decays $B^{\pm} \to [K^{+} K^{-} I ¨ ^{+} I ¨ ^{-}]_{D} h^{\pm}$ and $B^{\pm} \to [I ¨ ^{+} I ¨ ^{-} I ¨ ^{+} I ¨ ^{-}]_{D} h^{\pm}$ ( $h = K, I ¨ $ )

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1164

A model-independent determination of the CKM angle $I^^{3}$ is presented, using the $B^{\pm} \to [K^{+} K^{-} I ¨ ^{+} I ¨ ^{-}]_{D} h^{\pm}$ and $B^{\pm} \to [I ¨ ^{+} I ¨ ^{-} I ¨ ^{+} I ¨ ^{-}]_{D} h^{\pm}$ decays, with $h = K, I ¨ $ . T…

Measurement of $C P$ asymmetries in $I^_{b}^{0} \to p h^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1129

A search for $C P$ violation in $I^_{b}^{0} \to p K^{-}$ and $I^_{b}^{0} \to p I ¨ ^{-}$ decays is presented using the full Run 1 and Run 2 data samples of $pp$ collisions collected w…

A method for luminosity determination based on real-time hit reconstruction with the LHCb silicon pixel detector

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1177

The data acquisition system of the upgraded LHCb experiment includes the fast reconstruction of all hits in the vertex locator (VELO) pixel detector at the beam-crossing rate of 40…

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…

Differential measurement of the branching fraction and $C P$ asymmetry of the decay $B^{\pm} \to I ¨ ^{\pm} I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, M. Abdelfatah +1121

Differential measurements of the branching fraction and $C P$ asymmetry of the decay $B^{\pm} \to I ¨ ^{\pm} I^¼^{+} I^¼^{-}$ are performed in intervals of the dimuon mass squared, $q^{2}$ , using…

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…

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…

Measurement of the $B^{0} \to I ¨ (770)^{0} I^^{3}$ branching fraction

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

The ratio between the branching fractions of the $B^{0} \to I ¨ (770)^{0} I^^{3}$ and $B^{0} \to K^{*} (892)^{0} I^^{3}$ decays is measured with proton-proton collision data collect…

hep-ex2024

Measurement of the effective leptonic weak mixing angle

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1120

Using $pp$ collision data at $s = 13$ TeV, recorded by the LHCb experiment between 2016 and 2018 and corresponding to an integrated luminosity of $5.4$ fb $^{- 1}$ , the forward-…

Search for lepton-number-violating $B^{-} \to D^{(*) +} I^¼^{-} I^¼^{-}$ decays

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

A search is performed for lepton-number-violating $B^{-} \to D^{(*) +} I^¼^{-} I^¼^{-}$ decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass ener…

Search for resonance-enhanced $C P$ and angular asymmetries in the $I^_{c}^{+} \to p I^¼^{+} I^¼^{-}$ decay at LHCb

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

The first measurement of the $C P$ asymmetry of the decay rate ( $A_{C P}$ ) and the $C P$ average ( $I^£ A_{FB}$ ) and $C P$ asymmetry ( $I^ A_{FB}$ ) of the forward-backward asy…

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

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…

Observation of the doubly charmed baryon $I^_{cc}^{+}$ with the LHCb Run 3 detector

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

The first observation of the doubly charmed baryon $I^_{cc}^{+}$ is reported through its decay to the $I^_{c}^{+} K^{-} I ¨ ^{+}$ final state, with a statistical significance exceeding se…

nucl-ex2025

Coherent photoproduction of $I ¨ ^{0}, I ¨ $ and excited vector mesons in ultraperipheral PbPb collisions

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

The invariant-mass distribution for the coherent photoproduction of dipions in ultraperipheral PbPb collisions is measured using data, corresponding to an integrated luminosity of…

Measurement of the branching fraction of the $I^_{b}^{0} \to J / I ¨ I^$ decay and isospin asymmetry of $B \to J / I ¨ K$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1193

This paper describes a measurement of the $I^_{b}^{0} \to J / I ¨ I^$ branching fraction using data collected with the LHCb experiment in proton-proton collisions from 2016 to 2018. The dat…

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 $B^{0} \to I^\cdot_{c} (1 S) K^{+} I ¨ ^{-}$ 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…

Evidence for $B^{-} \to D^{** 0} I ¨ ^{-} I^½_{I ¨} $ decays

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

The first evidence for the decay $B^{-} \to D^{** 0} I ¨ ^{-} I^½_{I ¨} $ is obtained using proton-proton collision data collected by the LHCb experiment, corresponding to an i…

Deuteron identification via time of flight with LHCb

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

It is shown that the timing capabilities of the LHCb detector operated during the LHC Run 2 can be used to identify light ion particles with momenta of a few GeV/ $c$ . This is achie…

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…

First observation of the $B_{s}^{0} \to I^_{c}^{+} I^_{c}^{-}$ decay and evidence for the $B^{0} \to I^_{c}^{+} I^_{c}^{-}$ decay

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

A search is presented for the two-body charmed baryonic decays $B_{(s)}^{0} \to I^_{c}^{+} I^_{c}^{-}$ , using a data sample collected by the LHCb experiment duri…

Polarization measurement of $I^_{c}^{+}$ and $I^_{c}^{-}$ baryons in $p$ Ne collisions at $s_{N N} = 68.6$ GeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1174

The first measurement of the polarization of charm baryons by the LHCb experiment recorded in fixed-target mode is presented. The polarization of $I^_{c}$ baryons is studied in colli…

Observation of the decay $I ¨ _{c 1} (3872) \to J / I ¨ I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1184

The first observation of the $I ¨ _{c 1} (3872) \to J / I ¨ I^¼^{+} I^¼^{-}$ decay is reported using proton-proton collision data recorded with the LHCb detector corr…

Observation and investigation of the $T_{c c ˉ 1} (4430)^{+}$ structure in $B^{+} \to I ¨ (2 S) K_{S}^{0} I ¨ ^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1184

The first four-dimensional amplitude analysis of the $B^{+} \to I ¨ (2 S) K_{S}^{0} I ¨ ^{+}$ decay is performed with proton-proton collision data collected by the LHCb experimen…

Differential decay rate of $B^{+} \to J / I ¨ K^{+}$ with the LHCb Upgrade I experiment

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

The normalised decay rate of $B^{+} \to J / I ¨ (\to I^¼^{+} I^¼^{-}) K^{+}$ is measured as a function of the lepton helicity angle using a data sample corresponding to an integrated luminosity o…

Study of charm mixing and CP violation with $D^{0} \to K^{\pm} I ¨ ^{\mp} I ¨ ^{\pm} I ¨ ^{\mp}$ decays

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

A study of charm mixing and CP violation in $D^{0} \to K^{\pm} I ¨ ^{\mp} I ¨ ^{\pm} I ¨ ^{\mp}$ decays is performed using data collected by the LHCb experiment in proton-proton collisions from 2015 t…

Observation of a new excited charm-strange meson $D_{s 1} (2933)^{+}$ in $B^{0} \to D^{+} D^{-} K^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, M. Abdelfatah +1114

A new excited charm-strange meson is observed through an amplitude analysis of the full phase space of $B^{0} \to D^{+} D^{-} K^{+} I ¨ ^{-}$ decays. The analysis is based on a proton-proton co…

Precise measurement of the CKM angle $I^^{3}$ with a novel approach

The BESIII, LHCb Collaborations, : +1903

A measurement of the CKM angle $I^^{3}$ is performed by applying a novel, unbinned, model-independent approach to datasets of electron-positron collisions collected by the BESIII exper…

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…

Measurements of $I ¨ (2 S)$ and $I ¨ _{c 1} (3872)$ production within fully reconstructed jets

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1114

This paper presents the first measurement of $I ¨ (2 S)$ and $I ¨ _{c 1} (3872)$ meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its d…

Observation of the decay $B_{s}^{0} \to K^{0} p p ˉ$ and measurement of the $B_{(s)}^{0} \to K^{0} p p ˉ$ branching fractions

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

A study of the charmless baryonic decays $B_{(s)}^{0} \to K^{0} p p ˉ$ is presented, where $B_{(s)}^{0}$ denotes either a $B^{0}$ or a $B_{s}^{0}$ meson. The analysis is based on proton-pr…

Measurement of the branching fractions and longitudinal polarisations of $B_{(s)}^{0} \to K^{* 0} K^{* 0}$ decays

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

A time- and flavour-integrated amplitude analysis of $B^{0}$ and $B_{s}^{0}$ decays to the $(K^{+} I ¨ ^{-}) (K^{-} I ¨ ^{+})$ final state in the $K^*(892)^0 \kern 0.18em \overline{\kern -0.18em K}{}^{…

Measurement of the ratio of branching fractions $B (B_{c}^{+} \to J / I ¨ I ¨ ^{+} I^½_{I ¨} ) / B (B_{c}^{+} \to J / I ¨ I^¼^{+} I^½_{I^} ¼)$

LHCb collaboration, R. Aaij, M. Abdelfatah +1121

A measurement of the ratio of semileptonic branching fractions $R (J I ¨ )$ , defined as $\mathcal{R}(J/Ï) \equiv \mathcal{B}(B_c^+ \to J/ÏÏ^+ Î½_Ï)/\mathcal{B}(B_c^+ \to…

First measurement of time-dependent $C P$ violation in the flavor-changing neutral-current decay $B^{0} \to K_{S}^{0} I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1165

A flavor-tagged time-dependent analysis of $B^{0} \to K_{S}^{0} I^¼^{+} I^¼^{-}$ decays is performed across the full dimuon mass range excluding the $J / I ¨ $ and $I ¨ (2 S)$ resonanc…

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…

Search for resonances decaying to photon pairs with masses between 4.9 and 19.4 GeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1144

A search is presented for axion-like particles (ALPs) with masses between 4.9 and 19.4 GeV decaying to a pair of photons, using proton-proton collisions collected with the LHCb det…

Evidence for the decay $B_{s}^{0} \to I ¨ I^\cdot^{'}$

LHCb collaboration, R. Aaij, M. Abdelfatah +1101

Using a dataset corresponding to an integrated luminosity of $9 fb^{- 1}$ collected in proton-proton collisions between 2011 and 2018 by the LHCb experiment, evidence is…

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…

Search for the $B_{c}^{+} \to I ¨ _{c 1} (3872) I ¨ ^{+}$ decay

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

A search for the decay $B_{c}^{+} \to I ¨ _{c 1} (3872) I ¨ ^{+}$ is reported using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass…

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 very rare $I^£^{+} \to p I^¼^{+} I^¼^{-}$ decay

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

The first observation of the $I^£^{+} \to p I^¼^{+} I^¼^{-}$ decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of $5.4\,…

Measurement of $I ¨ (2 S)$ to $J / I ¨ $ cross-section ratio as function of multiplicity in $p$ Pb collisions at $s_{N N} = 8.16$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1139

The production ratio of $I ¨ (2 S)$ to $J / I ¨ $ charmonium states is presented as a function of multiplicity in proton-lead collisions at a centre-of-mass energy of $s_{N N} = 8.16$ …

Measurement of the branching fraction ratio $R_{K}$ at large dilepton invariant mass

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1138

A test of lepton universality between muons and electrons is performed using $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ decays (where $ℓ$ = $e$ , $I^¼$ ), in the dilepton invariant-mass-squared regi…

Measurement of $I ¨ (1020)$ meson production in fixed-target $p$ Ne collisions at $s_{N N}$ = 68.5 GeV

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

The first measurement of $I ¨ (1020)$ meson production in fixed-target $p$ Ne collisions at $s_{N N} = 68.5$ GeV is presented. The $I ¨ (1020)$ mesons are reconstructed in their $K^…

Measurement of charged-hadron distributions in heavy-flavor jets in proton-proton collisions at $s$ =13 TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1174

Charged-hadron distributions in heavy-flavor jets are measured in proton-proton collisions at a center-of-mass energy of $s$ = 13 TeV collected by the LHCb experiment. Distr…

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…

Search for the decays $B_{(s)}^{0} \to J / I ¨ I^^{3}$ at LHCb

LHCb collaboration, R. Aaij, M. Abdelfatah +1116

A search for the rare decays $B_{(s)}^{0} \to J / I ¨ I^^{3}$ is performed with proton-proton collision data collected by the LHCb experiment, corresponding to integrated luminosities of $3~\…

Branching fraction measurement of the decay $B^{+} \to I ¨ (2 S) I ¨ (1020) K^{+}$

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

The branching fraction of the decay $B^{+} \to I ¨ (2 S) I ¨ (1020) K^{+}$ , relative to the topologically similar decay $B^{+} \to J / I ¨ I ¨ (1020) K^{+}$ , is measured using proton-proton collision dat…

Measurement of CP asymmetries in $B^{0} \to D_{s}^{-} D^{+}$ and $B_{s}^{0} \to D_{s}^{+} D^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1190

Measurements of the combined CP asymmetries in $B^{0} \to D_{s}^{-} D^{+}$ and $B_{s}^{0} \to D_{s}^{+} D^{-}$ decays are ma…

Angular analysis of the $B^{+} \to I ¨ ^{+} I^¼^{+} I^¼^{-}$ decay

LHCb collaboration, R. Aaij, M. Abdelfatah +1112

This paper presents the first measurement of the forward-backward asymmetry, $A_{FB}$ , and the flat term, $F_{H}$ , that parameterise the angular distribution of the $B^+\toÏ^+…

Study of $\itÎ_{\it{b}}^\rm{0}$ and $\itÎ_{\it{b}}^\rm{0}$ decays to $I^ h^{+} h^{^{'} -}$ and evidence for $C P$ violation in $\itÎ_{\it{b}}^\rm{0}\to\itÎ K^+K^-$ decays

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

A study of $\itÎ_{\it{b}}^\rm{0}$ and $\itÎ_{\it{b}}^\rm{0}$ decays to $I^ h^{+} h^{' -}$ $(h^{(')} = I ¨ , K)$ is performed using $pp$ collision data collected by the L…

Branching fraction measurement of the $I^ \to p I^¼^{-} I^½_{I^} ¼$ decay

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

A measurement of the branching fraction for the decay $I^ \to p I^¼^{-} I^½_{I^} ¼$ is presented using $pp$ collision data collected by the LHCb experiment at a ce…

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

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

A first search for the lepton-flavour-violating decays $B^{0} \to K^{* 0} I ¨ ^{\pm} e^{\mp}$ is presented. The analysis is performed using a sample of proton-proton collision data, collected…

Observation of $B_{c}^{+} \to D h^{+} h^{-}$ decays

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

Searches are presented for $B_{c}^{+} \to D h^{+} h^{-}$ decays, where $D$ is a charmed meson and $h^{\pm}$ is a charged pion or kaon, using $pp$ collision data collected by the LHCb e…

Long-lived particle reconstruction downstream of the LHCb magnet

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1113

Charged-particle trajectories are usually reconstructed with the LHCb detector using combined information from the tracking devices placed upstream and downstream of the 4\,T\,m di…

Measurement of $\itÎ_\it{b}^0$, $\itÎ_\it{c}^+$ and $I^$ decay parameters using $\itÎ_\it{b}^0 \to \itÎ_\it{c}^+ h^-$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1106

A comprehensive study of the angular distributions in the bottom-baryon decays $I^_{b}^{0} \to I^_{c}^{+} h^{-} (h = I ¨ , K)$ , followed by $I^_{c}^{+} \to I^ h^{+}$ with $\itÎ\to \it…

Observation of the charmless purely baryonic decay $I^_{b}^{0} \to I^ p p$

LHCb collaboration, R. Aaij, M. Abdelfatah +1103

A search for the charmless purely baryonic decay $I^_{b}^{0} \to I^ p p$ is performed using proton-proton collision data recorded by the LHCb expe…

Measurement of branching fractions and $C P$ asymmetries in $I^_{b}^{0} (I^_{b}^{0}) \to p K_{S}^{0} h^{-}$ decays

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

A study of $I^_{b}^{0}$ and $I^_{b}^{0}$ baryon decays to the final states $p K_{S}^{0} I ¨ ^{-}$ and $p K_{S}^{0} K^{-}$ is performed using $pp$ collision data collected b…

Measurement of the Z-boson mass

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1129

The first dedicated $Z$ -boson mass measurement at the LHC with $Z \to I^¼^{+} I^¼^{-}$ decays is reported. The dataset uses proton-proton collisions at a centre-of-mass energy of $13$ TeV…

Search for $K_{S (L)}^{0} \to I ¨ ^{+} I ¨ ^{-} I^¼^{+} I^¼^{-}$ decays at LHCb

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

A search for $K_{S (L)}^{0} \to I ¨ ^{+} I ¨ ^{-} I^¼^{+} I^¼^{-}$ decays is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mas…

Measurement of the multiplicity dependence of $\mitÎ¥$ production ratios in $pp$ collisions at $s = 13$ TeV

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

The $\mitÎ¥(\mathrm{2}S)$ and $\mitÎ¥(\mathrm{3}S)$ production cross-sections are measured relative to that of the $\mitÎ¥(\mathrm{1}S)$ meson, as a function of charged-particle mu…

First measurement of the decay-time-integrated $C P$ asymmetry in $B_{s}^{0} \to D_{s}^{-} I ¨ ^{+}$ decays

LHCb collaboration, R. Aaij, M. Abdelfatah +1114

A measurement of the flavour-untagged decay-time-integrated $C P$ asymmetry in the flavour-specific decay $B_{s}^{0} \to D_{s}^{-} I ¨ ^{+}$ , $⟨ A_{untagged}^{s} ⟩$ , is perf…

#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…

Observation of a new charmed baryon decaying to $I^_{c}^{+} I ¨ ^{-} I ¨ ^{+}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1139

The $I^_{c}^{+} I ¨ ^{-} I ¨ ^{+}$ spectrum is investigated using proton-proton collisions at a center-of-mass energy of 13TeV, corresponding to an integrated luminosity of 5.4fb $^{- 1}$ , colle…

Observation of new excited $I^£_{c}^{0}$ states in the $B^{-} \to I^_{c}^{+} p I ¨ ^{-}$ decay

LHCb collaboration, R. Aaij, M. Abdelfatah +1100

An amplitude analysis of the $B^{-} \to I^_{c}^{+} p I ¨ ^{-}$ decay is performed using proton-proton collision data, corresponding to an integrated luminosity of $9\tex…

Measurement of inclusive production of charmonium states in $b$ -hadron decays via their decay into $I ¨ I ¨ $

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

The inclusive production of the $I^\cdot_{c} (1 S)$ , $I^\cdot_{c} (2 S)$ and $I ¨ _{c}$ charmonium states in $b$ -hadron decays is studied with LHCb Run~2 data, corresponding to an integrated luminosit…

First evidence of the $B_{s}^{0} \to K^{-} I ¨ ^{+} I^^{3}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1173

The first search for the $B_{s}^{0} \to K^{-} I ¨ ^{+} I^^{3}$ decay in the range $796 < m (K^{-} I ¨ ^{+}) < 1800 MeV/ c^{2}$ is performed using data from proton-proton collisions collected by th…

Modification of $I^¥$ production in $p$ O and OO collisions at LHCb

LHCb collaboration, R. Aaij, M. Abdelfatah +1161

The production rates of $I^¥ (2 S)$ and $I^¥ (3 S)$ mesons relative to that of the $I^¥ (1 S)$ state are measured in $pp$ , $p$ O, and OO collisions by the LHCb collabora…

Measurement of the local and nonlocal amplitudes in $B^{+} \to K^{+} I^¼^{+} I^¼^{-}$ decays

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

This paper presents a thorough study of the local and nonlocal amplitudes in $B^{+} \to K^{+} I^¼^{+} I^¼^{-}$ transitions through an amplitude analysis of the dimuon mass spectrum of the deca…

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 $C P$ violation in $D^{+} \to I ¨ I ¨ ^{+}$ decays

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

A search for charge-parity ( $C P$ ) violation in the Cabibbo-suppressed $D^{+} \to I ¨ I ¨ ^{+}$ decay is presented, using proton-proton collision data corresponding to an integrated lumin…

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 $W$ -boson production cross-sections in $pp$ collisions at $s$ = 13 TeV in the forward region

LHCb collaboration, R. Aaij, M. Abdelfatah +1114

A precision measurement of the $W$ -boson production cross-section is performed using the $W \to I^¼ I^½$ decay channel, based on a sample of proton-proton collision data collected by…