B. Shi

Measurement of CP violation in $B^{0} \to I ¨ (\to ℓ^{+} ℓ^{-}) K_{S}^{0} (\to I ¨ ^{+} I ¨ ^{-})$ decays

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

A measurement of time-dependent CP violation in the decays of $B^{0}$ and $B^{0}$ mesons to the final states $J / I ¨ (\to I^¼^{+} I^¼^{-}) K_{S}^{0}$ , $I ¨ (2 S) (\to I^¼^{+} I^¼^{-}) K_{S}^{0}$ and $J/Ï(\…

Observation of the rare baryonic decay $B^{+} \to p I^ ˉ$ and measurement of its weak decay parameter

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

The first observation of the decay $B^{+} \to p I^ ˉ$ is presented, using proton-proton collision data collected by the LHCb experiment between 2016 and 2018 at a cen…

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…

Observation of muonic Dalitz decays of $I ¨ _{b}$ mesons and precise spectroscopy of hidden-beauty states

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1117

The decays of the $I ¨ _{b 1} (1 P)$ , $I ¨ _{b 2} (1 P)$ , $I ¨ _{b 1} (2 P)$ and $I ¨ _{b 2} (2 P)$ mesons into the $I^¥ (1 S) I^¼^{+} I^¼^{-}$ final state are observed with a high significance using proton-prot…

Study of $B_{c} (1 P)^{+}$ states in the $B_{c}^{+} I^^{3}$ mass spectrum

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

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

nucl-ex2024

Measurement of forward charged hadron flow harmonics in peripheral PbPb collisions at $s_{N N} = 5.02$ TeV with the LHCb detector

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

Flow harmonic coefficients, $v_{n}$ , which are the key to studying the hydrodynamics of the quark-gluon plasma (QGP) created in heavy-ion collisions, have been measured in various co…

Evidence for the rare decay $B^{+} \to I^ˉ p I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1192

A search for the rare decay $B^{+} \to I^ˉ p I^¼^{+} I^¼^{-}$ is performed using proton-proton collision data recorded by the LHCb experiment at a center-of-mass energy of $\sqrt{…

Search for the lepton-flavour violating decays $B^{+} \to I ¨ ^{+} I^¼^{\pm} e^{\mp}$

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

The first search for the lepton-flavour violating decays $B^{+} \to I ¨ ^{+} I^¼^{\pm} e^{\mp}$ in proton-proton collisions is presented, using data collected by the LHCb experiment betwe…

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…

Measurement of the CKM angle $I^^{3}$ in $B^{\pm} \to D K^{*} (892)^{\pm}$ decays

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

Measurements of $C P$ observables and the CKM angle $I^^{3}$ are performed in $B^{\pm} \to D K^{*} (892)^{\pm}$ decays, where $D$ represents a superposition of $D^{0}$ and $D^{0}$ …

Observation of the $B^{+} \to J / I ¨ I^\cdot^{'} K^{+}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1049

The $B^{+} \to J / I ¨ I^\cdot^{'} K^{+}$ decay is observed for the first time using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7,…

Measurement of the $I^_{b}^{0} \to I^ (1520) I^¼^{+} I^¼^{-}$ differential branching fraction

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1046

The branching fraction of the rare decay $I^_{b}^{0} \to I^ (1520) I^¼^{+} I^¼^{-}$ is measured for the first time, in the squared dimuon mass intervals, $q^{2}$ , excluding the $J / I ¨ $ and…

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…

Search for prompt production of pentaquarks in charm hadron final states

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1093

A search for hidden-charm pentaquark states decaying to a range of $I^£_{c} D ˉ$ and $I^_{c} D ˉ$ final states, as well as doubly-charmed pentaquark states to $I^£_{c} D$ and $Î…

Analysis of $I^_{b}^{0} \to p K^{-} I^¼^{+} I^¼^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1117

The differential branching fraction and angular coefficients of $I^_{b}^{0} \to p K^{-} I^¼^{+} I^¼^{-}$ decays are measured in bins of the dimuon mass squared and dihadron ma…

Observation of the $B_{c}^{+} \to J / I ¨ I ¨ ^{+} I ¨ ^{0}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1068

The first observation of the $B_{c}^{+} \to J / I ¨ I ¨ ^{+} I ¨ ^{0}$ decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 9fb…

Search for $B_{(s)}^{* 0} \to I^¼^{+} I^¼^{-}$ in $B_{c}^{+} \to I ¨ ^{+} I^¼^{+} I^¼^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1116

A search for the very rare $B^{* 0} \to I^¼^{+} I^¼^{-}$ and $B_{s}^{* 0} \to I^¼^{+} I^¼^{-}$ decays is conducted by analysing the $B_{c}^{+} \to I ¨ ^{+} I^¼^{+} I^¼^{-}$ process. The analysis uses proton-proton col…

Measurement of $J / I ¨ $ -pair production in $pp$ collisions at $s = 13$ TeV and study of gluon transverse-momentum dependent PDFs

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1080

The production cross-section of $J / I ¨ $ pairs in proton-proton collisions at a centre-of-mass energy of $s = 13$ TeV is measured using a data sample corresponding to an integra…

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…

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…

Observation of exotic $J / I ¨ I ¨ $ resonant structure in diffractive processes in proton-proton collisions

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

The first study of $J / I ¨ I ¨ $ production in diffractive processes in proton-proton collisions is presented. The study is based on an LHCb dataset recorded at centre-of-mass energy of…

Improved measurement of $I^\cdot / I^\cdot^{'}$ mixing in $B_{(s)}^{0} \to J / I ¨ I^\cdot^{(')}$ decays

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

Branching fraction ratios between the decays $B_{(s)}^{0} \to J / I ¨ I^\cdot^{(')}$ are measured using proton-proton collision data collected by the LHCb experiment at centre-…

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}…

Measurement of $γ$ using $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ decays with $D \to K_{S}^{0} π^{+} π^{-}$ and $D \to K_{S}^{0} K^{+} K^{-}$

LHCb collaboration, R. Aaij, M. Abdelfatah +1119

A measurement of the CKM angle $γ$ using the decay channels $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D π^{\pm}$ , where the $D$ meson decays to $D\rightarrow K_{\rm S}^{…

Observation of charge-parity symmetry breaking in baryon decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1136

The Standard Model of particle physics-the theory of particles and interactions at the smallest scale-predicts that matter and antimatter interact differently due to violation of t…

Observation of the $I^_{b}^{0} \to J / I ¨ I^^{-} K^{+}$ and $I^_{b}^{0} \to J / I ¨ I^^{-} I ¨ ^{+}$ decays

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

The first observation of the $I^_{b}^{0} \to J / I ¨ I^^{-} I ¨ ^{+}$ decay and the most precise measurement of the branching fraction of the $I^_{b}^{0} \to J / I ¨ I^^{-} K^{+}$ decay are reported, using…

Precision measurement of the muon charge asymmetry from $W$ -boson decays in $pp$ collisions at $s$ = 13 TeV in the forward region

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

A precision measurement of the muon charge asymmetry from $W$ -boson decays in proton-proton collisions at $s$ = 13 TeV is presented. The analysis utilizes data corresponding…

Measurement of $D^{0} - D^{0}$ mixing and search for $C P$ violation with $D^{0} \to K^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1073

A measurement of the time-dependent ratio of the $D^{0} \to K^{+} I ¨ ^{-}$ to $D^{0} \to K^{+} I ¨ ^{-}$ decay rates is reported. The analysis uses a sample of proton-proto…

Prompt and nonprompt $I ¨ (2 S)$ production in $p$ Pb collisions at $s_{N N} = 8.16$ TeV

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

The production of $I ¨ (2 S)$ mesons in proton-lead collisions at a centre-of-mass energy per nucleon pair of $s_{N N} = 8.16$ TeV is studied with the LHCb detector using data cor…

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…

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 +1128

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

Search for heavy neutral leptons in B-meson decays

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

A search for long-lived heavy neutral leptons produced in B-meson decays and decaying to a $I^¼^{\pm} I ¨ ^{\mp}$ final state is performed with data collected by the LHCb experiment in p…

Measurement of the $Z$ boson production cross-section in $pp$ collisions at $s = 5.02$ TeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1080

The first measurement of the $Z$ boson production cross-section at centre-of-mass energy $s = 5.02$ TeV in the forward region is reported, using $pp$ collision data collect…

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…

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…

$C P$ violation analysis of local and nonlocal amplitudes in the $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay

LHCb collaboration, R. Aaij, M. Abdelfatah +1118

A search for $C P$ violation in the $B^{0} \to K^{* 0} μ^{+} μ^{-}$ decay is performed using proton-proton collision data collected by the LHCb experiment during Run…

Amplitude analysis of $B^{0} \to D^{0} D_{s}^{+} I ¨ ^{-}$ and $B^{+} \to D^{-} D_{s}^{+} I ¨ ^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1055

Resonant contributions in $B^{0} \to D^{0} D_{s}^{+} I ¨ ^{-}$ and $B^{+} \to D^{-} D_{s}^{+} I ¨ ^{+}$ decays are determined with an amplitude analysis, which is performed both se…

Amplitude analysis of $B^{+} \to I ¨ (2 S) K^{+} I ¨ ^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1096

The first full amplitude analysis of $B^{+} \to I ¨ (2 S) K^{+} I ¨ ^{+} I ¨ ^{-}$ decays is performed using proton-proton collision data corresponding to an integrated luminosity of $9\,\text{fb…

Determination of short- and long-distance contributions in $B^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$ decays

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. The analysis is based on data collected by the LHCb experiment from proton-proton collisions at $\sqrt{s}…

Measurement of the Lund plane for light- and beauty-quark jets

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1136

The substructure of jets in quantum chromodynamics (QCD) has garnered significant attention with the advent of infrared- and collinear-safe clustering algorithms and observables. A…

Updated measurement of $C P$ violation and polarisation in $B_{s}^{0} \to J / I ¨ K^{*} (892)^{0}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1169

A time-integrated angular analysis of the decay $B_{s}^{0} \to J / I ¨ K^{*} (892)^{0}$ , with $J / I ¨ \to I^¼^{+} I^¼^{-}$ and $\overline{K}{}^{*}\kern-1pt(…

Measurements of charmed meson and antimeson production asymmetries at $s = 13.6$ TeV

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

This article presents doubly differential measurements of the asymmetries in production rates between mesons containing a charm quark and those containing an anticharm quark in pro…

Measurement of the top-quark production cross-section and charge asymmetry at LHCb

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

The first measurements of the top- and antitop-quark differential production cross-sections and the top-quark charge asymmetry in the forward region are presented, using proton-pro…

Measurement of the CKM angle $I^^{3}$ using the $B^{\pm} \to D^{*} h^{\pm}$ channels

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

A measurement of the $C P$ -violating observables from $B^{\pm} \to D^{*} K^{\pm}$ and $B^{\pm} \to D^{*} I ¨ ^{\pm}$ decays is presented, where $D^{*} (D)$ is an admixture of…

Observation of a resonant structure near the $D_{s}^{+} D_{s}^{-}$ threshold in the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay

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

An amplitude analysis of the $B^{+} \to D_{s}^{+} D_{s}^{-} K^{+}$ decay is carried out to study for the first time its intermediate resonant contributions, using proton-proton collision data c…

Measurement of the branching fraction ratios $R (D^{+})$ and $R (D^{*+})$ using muonic $I ¨ $ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066

The branching fraction ratios of $B^{0} \to D^{+} I ¨ ^{-} I^½_{I ¨} $ and $B^{0} \to D^{*+} I ¨ ^{-} I^½_{I ¨} $ decays are measured with respect to their muonic counter…

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…

Observation of new charmonium(-like) states in $B^{+} \to D^{*\pm} D^{\mp} K^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066

A study of resonant structures in $B^{+} \to D^{*+} D^{-} K^{+}$ and $B^{+} \to D^{*-} D^{+} K^{+}$ decays is performed, using proton-proton collision data at cen…

Measurement of the $D^{}$ longitudinal polarization in $B^{0} \to D^{-} I ¨ ^{+} I^½_{I ¨} $ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1091

The longitudinal polarization fraction of the $D^{*}$ meson is measured in $B^{0} \to D^{*-} I ¨ ^{+} I^½_{I ¨} $ decays, where the $I ¨ $ lepton decays to three charged pions and a neutrino, us…

Study of charmonium decays 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 +1049

A study of the $B^{+} \to K_{S}^{0} K^{+} K^{-} I ¨ ^{+}$ and $B^{+} \to K_{S}^{0} K^{+} K^{+} I ¨ ^{-}$ decays is performed using proton-proton collisions at center-of-mass energies of 7, 8 and 13 TeV at the LHCb ex…

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…

Open charm production and asymmetry in $p$ Ne collisions at $s_{NN} =$ 68.5 GeV

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1053

A measurement of $D^{0}$ meson production by the LHCb experiment in its fixed-target configuration is presented. The production of $D^{0}$ mesons is studied with a beam of 2.5 TeV prot…

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}…

Improved measurement of $C P$ violation parameters in $B_{s}^{0} \to J / I ¨ K^{+} K^{-}$ decays in the vicinity of the $I ¨ (1020)$ resonance

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

The decay-time-dependent $C P$ asymmetry in $B_{s}^{0} \to J / I ¨ (\to I^¼^{+} I^¼^{-}) K^{+} K^{-}$ decays is measured using proton-proton collision data, corresponding to an integrated lumino…

nucl-ex2026

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.…

nucl-ex2026

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…

Precision measurement of $CP$ violation in the penguin-mediated decay $B_{s}^{0} \to I ¨ I ¨ $

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1044

A flavor-tagged time-dependent angular analysis of the decay $B_{s}^{0} \to I ¨ I ¨ $ is performed using $pp$ collision data collected by the LHCb experiment at $s = 13$ TeV,…

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…

Study of charmonium production via the decay to $p p ˉ$ at $s = 13 T e V$

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1063

Charmonium production cross-section in proton-proton collisions is measured at the centre-of-mass energy $s = 13 T e V$ using decays to $p p ˉ$ final state. The study is per…

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}^…

Measurements of the branching fraction ratio $B (I ¨ \to I^¼^{+} I^¼^{-}) / B (I ¨ \to e^{+} e^{-})$ with charm meson decays

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

Measurements of the branching fraction ratio $B (I ¨ \to I^¼^{+} I^¼^{-}) / B (I ¨ \to e^{+} e^{-})$ with $D_{s}^{+} \to I ¨ ^{+} I ¨ $ and $D^{+} \to I ¨ ^{+} I ¨ $ decays, denoted $R^{s}_…

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…

Search for the rare decay of charmed baryon $I^_{c}^{+}$ into $p I^¼^{+} I^¼^{-}$ final state

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066

A search for the nonresonant $I^_{c}^{+} \to p I^¼^{+} I^¼^{-}$ decay is performed using proton-proton collision data recorded at a centre-of-mass energy of 13 TeV by the LHCb experiment, co…

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}…

Amplitude analysis and branching fraction measurement of $B^{+} \to D^{*-} D_{s}^{+} I ¨ ^{+}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1060

The decays of the $B^{+}$ meson to the final state $D^{*-} D_{s}^{+} I ¨ ^{+}$ are studied in proton-proton collision data collected with the LHCb detector at centre-of-mass energies o…

Tracking of charged particles with nanosecond lifetimes at LHCb

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1063

A method is presented to reconstruct charged particles with lifetimes between 10 ps and 10 ns, which considers a combination of their decay products and the partial tracks created…

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…

A search for rare $B \to D I^¼^{+} I^¼^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1046

A search for rare $B \to D I^¼^{+} I^¼^{-}$ decays is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of…

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…

First observation of a doubly charged tetraquark and its neutral partner

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1055

A combined amplitude analysis is performed for the decays $B^{0} \to D^{0} D_{s}^{+} I ¨ ^{-}$ and $B^{+} \to D^{-} D_{s}^{+} I ¨ ^{+}$ , which are related by isospin symmetry. The…

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 lepton universality parameters in $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays

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

A simultaneous analysis of the $B^{+} \to K^{+} ℓ^{+} ℓ^{-}$ and $B^{0} \to K^{* 0} ℓ^{+} ℓ^{-}$ decays is performed to test muon-electron universality in two ranges of the square of the di…

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…

Observation of the $B_{s}^{0} \to I ¨ _{c 1} (3872) I ¨ ^{+} I ¨ ^{-}$ decay

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1045

The first observation of the $B_{s}^{0} \to (I ¨ _{c 1} (3872) \to J / I ¨ I ¨ ^{+} I ¨ ^{-}) I ¨ ^{+} I ¨ ^{-}$ decay is reported using proton-proton collision data, corresponding…

Observation of $I^_{b}^{0} \to I^_{c}^{+} D_{s}^{-}$ and $I^_{b}^{-} \to I^_{c}^{0} D_{s}^{-}$ decays

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1090

The $I^_{b}^{0} \to I^_{c}^{+} D_{s}^{-}$ and $I^_{b}^{-} \to I^_{c}^{0} D_{s}^{-}$ decays are observed for the first time using proton-proton collision data collected by the LHCb experime…

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…

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

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1067

A sample of $pp$ collision data, corresponding to an integrated luminosity of 5.5 fb $^{- 1}$ and collected by the LHCb experiment during LHC Run 2, is used to measure the ratio of t…

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…

Transverse polarization measurement of $I^$ hyperons in $p$ Ne collisions at $s_{N N}$ = 68.4 GeV with the $\mbox{LHCb}$ detector

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1068

A measurement of the transverse polarization of the $I^$ and $I^ˉ $ hyperons in $p$ Ne fixed-target collisions at $s_{N N}$ = 68.4 GeV is presented using data collected by t…

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…

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…