Publications (183)
Measurement of asymmetry in decays with Run 3 data
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1189
A measurement of asymmetry in decays is reported, based on a data sample of proton-proton collisions collected with the LHCb detector in 20…
violation analysis of local and nonlocal amplitudes in the decay
LHCb collaboration, R. Aaij, M. Abdelfatah +1104
A search for violation in the decay is performed using proton--proton collision data collected by the LHCb experiment during R…
Amplitude analysis of decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1096
The first full amplitude analysis of 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 decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1082
An amplitude analysis of the 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 violation and polarisation in decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1169
A time-integrated angular analysis of the decay , with and $\overline{K}{}^{*}\kern-1pt(…
Measurements of charmed meson and antimeson production asymmetries at 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 branching fraction ratios and using muonic decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066
The branching fraction ratios of and decays are measured with respect to their muonic counter…
Inclusive -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 mesons at production in collisions by utilising all tracks from the hadronisation process. The algorithm is…
Observation of new charmonium(-like) states in decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066
A study of resonant structures in and decays is performed, using proton-proton collision data at cen…
Measurement of the longitudinal polarization in decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1091
The longitudinal polarization fraction of the meson is measured in decays, where the lepton decays to three charged pions and a neutrino, us…
Machine learning techniques for jet reconstruction at LHCb and application to the search for and in TeV 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 states
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1155
The observation of a wide peaking structure in the mass spectrum is reported using proton-proton collision data collected by the LHCb detector at center-of-mass ener…
First measurement of -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 violation parameters in decays in the vicinity of the resonance
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1083
The decay-time-dependent asymmetry in decays is measured using proton-proton collision data, corresponding to an integrated lumino…
Measurement of transverse and hyperon polarization in Pb collisions at TeV
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1131
The transverse polarization of and hyperons is measured in Pb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of 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 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 violation observables in decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1112
A search for violation of the charge-parity symmetry in the decay is presented, with proton-proton collision data corresponding to an integrated…
Test of lepton flavour universality with decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1132
The first test of lepton flavor universality between muons and electrons using () decays is presented. The measurement is performed wit…
Study of charmonium production via the decay to at
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 using decays to final state. The study is per…
First evidence of violation in beauty baryon to charmonium decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1178
A study of the difference in the asymmetries between and decays, , is performed using proto…
Observation of the open-charm tetraquark candidate in the decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1133
An amplitude analysis of decays is performed using proton-proton collision data, corresponding to an integrated luminosity of $9\,\text{fb}^…
Measurements of the branching fraction ratio with charm meson decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1083
Measurements of the branching fraction ratio with and decays, denoted $R^{s}_…
Angular analysis of the decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1132
An angular analysis of the decay 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 into final state
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1066
A search for the nonresonant 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
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1186
A search for the charmless baryonic decay is performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated…
Study of the decay
LHCb collaboration, R. Aaij, M. Abdelfatah +1113
The decay 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 asymmetry in decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1119
A measurement of the -violating parameters in decays is reported, based on the analysis of proton-proton collision data collected by the LHCb expe…
Study of in decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1129
An amplitude analysis of the transition is performed simultaneously in , $B^{+}\to{\bar{D}}^{0} D_{s}…
Amplitude analysis and branching fraction measurement of decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1060
The decays of the meson to the final state 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
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1182
The first evidence for the decay 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
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1134
A search for the doubly-charmed-baryon decay is performed using proton-proton collision data collected by the LHCb experiment at…
Test of lepton flavour universality with decays at large dilepton invariant mass
LHCb collaboration, R. Aaij, M. Abdelfatah +1115
Muon-electron universality is tested in decays, in the dilepton-invariant-mass region above the resonance. The analysis uses beauty mesons…
Comprehensive analysis of the decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1183
An analysis of the decay is presented using proton-proton collision data collected by the LHCb experiment, corresponding to an i…
Improved branching-fraction measurements of decays and first observation of
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1123
This paper presents a study of the charmless three-body decays (where ), using a sample of collision…
Precision measurement of the baryon lifetime
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1176
A sample of collision data, corresponding to an integrated luminosity of 5.4 fb 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 baryons
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1112
The decay chains are observed, and the spin-parity of baryons is determined for the first time.…
Searches for and decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1185
The first searches for and decays at the LHCb experiment are conducted with collision data corresponding to an integrated lu…
A model-independent measurement of the CKM angle in the decays and ()
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1164
A model-independent determination of the CKM angle is presented, using the and decays, with . T…
Multiplicity dependence of in collisions at TeV
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1087
The ratio of production cross-sections of over mesons as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy $\sqrt{s…
Observation of and decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1090
The and decays are observed for the first time using proton-proton collision data collected by the LHCb experime…
Measurement of asymmetries in decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1129
A search for violation in and decays is presented using the full Run 1 and Run 2 data samples of collisions collected w…
Precision measurement of the baryon lifetime
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1067
A sample of collision data, corresponding to an integrated luminosity of 5.5 fb 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 + 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 boson and prompt production in proton-proton collisions at TeV with the LHCb detector in the forward rapidity reg…
Transverse polarization measurement of hyperons in Ne collisions at = 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 and hyperons in Ne fixed-target collisions at = 68.4 GeV is presented using data collected by t…
Differential measurement of the branching fraction and asymmetry of the decay
LHCb collaboration, R. Aaij, M. Abdelfatah +1121
Differential measurements of the branching fraction and asymmetry of the decay are performed in intervals of the dimuon mass squared, , using…
New measurements of 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 collected by the LHCb experiment, searches are performed for mesons d…
Enhanced production of baryons in high-multiplicity collisions at TeV
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1085
The production rate of baryons relative to mesons in collisions at a center-of-mass energy TeV is measured by the LHCb experiment. The rat…
Precision measurement of CP violation and branching fractions in decays and search for the rare decay
R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta +1177
The decay , with a asymmetry expected to be close to zero in the Standard Model, is theoretically clean and sensitive to potential new p…
Momentum scale calibration of the LHCb spectrometer
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1076
For accurate determination of particle masses accurate knowledge of the momentum scale of the detectors is crucial. The procedure used to calibrate the momentum scale of the LHCb s…
Measurement of the branching fraction
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1160
The ratio between the branching fractions of the and decays is measured with proton-proton collision data collect…
Measurement of the effective leptonic weak mixing angle
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1120
Using collision data at TeV, recorded by the LHCb experiment between 2016 and 2018 and corresponding to an integrated luminosity of fb, the forward-…
Search for lepton-number-violating decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1188
A search is performed for lepton-number-violating decays, using data collected by the LHCb experiment in proton-proton collisions at a center-of-mass ener…
Search for resonance-enhanced and angular asymmetries in the decay at LHCb
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1131
The first measurement of the asymmetry of the decay rate () and the average () and asymmetry () of the forward-backward asy…
Measurement of the average transverse momentum of forward prompt charged particles in and collisions at
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 with the LHCb Run 3 detector
LHCb collaboration, R. Aaij, M. Abdelfatah +1106
The first observation of the doubly charmed baryon is reported through its decay to the final state, with a statistical significance exceeding se…
Coherent photoproduction of 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…
Observation of and decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1081
The decays and are observed for the first time, in proton-proton collision data at TeV corresponding…
Measurement of the branching fraction of the decay and isospin asymmetry of decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1193
This paper describes a measurement of the branching fraction using data collected with the LHCb experiment in proton-proton collisions from 2016 to 2018. The dat…
Rapidity and multiplicity dependence of charged-particle flow in Pb collisions at 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 Pb collisions in the pseudorapidity range \cal{2.0 4.8}.…
Amplitude analysis of decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1185
An amplitude analysis of the decays with is performed using a sample corresponding to an integrated luminosity of…
Evidence for decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1132
The first evidence for the decay 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/. This is achie…
First evidence for direct CP violation in beauty to charmonium decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1131
The asymmetry and branching fraction of the CKM-suppressed decay are precisely measured relative to the favoured decay $B^+\!\to…
First observation of the decay and evidence for the decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1187
A search is presented for the two-body charmed baryonic decays , using a data sample collected by the LHCb experiment duri…
A model-independent measurement of the CKM angle in partially reconstructed decays with
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1081
A measurement of -violating observables in and decays is made where the photon or neutral pion from the $D^{*} \to DÎ…
Polarization measurement of and baryons in Ne collisions at 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 baryons is studied in colli…
Observation of the decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1184
The first observation of the decay is reported using proton-proton collision data recorded with the LHCb detector corr…
Observation and investigation of the structure in decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1184
The first four-dimensional amplitude analysis of the decay is performed with proton-proton collision data collected by the LHCb experimen…
Differential decay rate of with the LHCb Upgrade I experiment
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1183
The normalised decay rate of is measured as a function of the lepton helicity angle using a data sample corresponding to an integrated luminosity o…
Probing the nature of the state using radiative decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1097
The radiative decays and are used to probe the~nature of the~ state using proton-proton collisio…
Study of charm mixing and CP violation with decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1188
A study of charm mixing and CP violation in 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 in 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 decays. The analysis is based on a proton-proton co…
Precise measurement of the CKM angle with a novel approach
The BESIII, LHCb Collaborations, : +1903
A measurement of the CKM angle is performed by applying a novel, unbinned, model-independent approach to datasets of electron-positron collisions collected by the BESIII exper…
Measurement of the and baryon lifetimes using hadronic -baryon decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1143
The lifetimes of the and baryons are measured using a collision dataset collected by the LHCb experiment, corresponding to an integrated luminosity of $9~\rm…
Measurements of and production within fully reconstructed jets
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1114
This paper presents the first measurement of and meson production within fully reconstructed jets. Each quarkonium state (tag) is reconstructed via its d…
Observation of the decay and measurement of the branching fractions
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1131
A study of the charmless baryonic decays is presented, where denotes either a or a meson. The analysis is based on proton-pr…
A measurement of
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1081
Using a dataset corresponding to of integrated luminosity collected with the LHCb detector between 2011 and 2018 in proton-proton collisions, the decay-time di…
Measurement of the branching fractions and longitudinal polarisations of decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1183
A time- and flavour-integrated amplitude analysis of and decays to the final state in the $K^*(892)^0 \kern 0.18em \overline{\kern -0.18em K}{}^{…
First observation of decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1071
The four decays, , are observed for the first time using proton-proton collision data collected with the LHCb detector at a cent…
Measurement of the ratio of branching fractions
LHCb collaboration, R. Aaij, M. Abdelfatah +1121
A measurement of the ratio of semileptonic branching fractions , defined as $\mathcal{R}(J/Ï) \equiv \mathcal{B}(B_c^+ \to J/ÏÏ^+ ν_Ï)/\mathcal{B}(B_c^+ \to…
Study of -hadron decays to final states
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1075
Decays of and baryons to final states, with being , and meson…
First measurement of time-dependent violation in the flavor-changing neutral-current decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1165
A flavor-tagged time-dependent analysis of decays is performed across the full dimuon mass range excluding the and resonanc…
Helium identification with LHCb
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1082
The identification of helium nuclei at LHCb is achieved using a method based on measurements of ionisation losses in the silicon sensors and timing measurements in the Outer Tracke…
Measurement of violation in and decays
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1118
A time-dependent, flavour-tagged measurement of violation is performed with and decays, using data…
Search for violation in the phase space of decays with the energy test
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1091
A search for violation in and decays is reported. The search is performed usin…
Measurement of the to cross-section ratio as a function of centrality in PbPb collisions at = 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…
-jet fragmentation with decays in TeV 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 mesons in jets are measured. The 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
LHCb collaboration, R. Aaij, M. Abdelfatah +1101
Using a dataset corresponding to an integrated luminosity of collected in proton-proton collisions between 2011 and 2018 by the LHCb experiment, evidence is…
First observation of the decay and search for pentaquarks in the system
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1176
The decay is observed for the first time using the data sample from proton-proton collisions recorded at a center…
Amplitude analysis of the decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1088
The resonant structure of the radiative decay in the region of proton-kaon invariant-mass up to 2.5 GeV is studied using proton-proton collision data recor…
Search for the decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1128
A search for the decay is reported using proton-proton collision data collected with the LHCb detector between 2011 and 2018 at centre-of-mass…
Comprehensive analysis of local and nonlocal amplitudes in the decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1073
A comprehensive study of the local and nonlocal amplitudes contributing to the decay is performed by analysing the phase-space distrib…
Measurement of the CKM angle in decays with a novel approach
The BESIII, LHCb Collaborations, : +1903
A measurement of the CKM angle 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 decay
LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1131
The first observation of the decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of $5.4\,…