D. Gerick

Constraints on the $K_{S}^{0} \to I^¼^{+} I^¼^{-}$ branching fraction

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +901

A search for the decay $K_{S}^{0} \to I^¼^{+} I^¼^{-}$ is performed using proton-proton collision data, corresponding to an integrated luminosity of $5.6 fb^{- 1}$ …

Test of lepton universality with $I^_{b}^{0} \to p K^{-} ℓ^{+} ℓ^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +904

The ratio of branching fractions of the decays $I^_{b}^{0} \to p K^{-} e^{+} e^{-}$ and $I^_{b}^{0} \to p K^{-} I^¼^{+} I^¼^{-}$ , $R_{p K}^{- 1}$ , is measured for the first time using proton-p…

A model-independent confirmation of the $Z (4430)^{-}$ state

LHCb collaboration, R. Aaij, B. Adeva +723

The decay $B^{0} \to I ¨ (2 S) K^{+} I ¨ ^{-}$ is analyzed using $3 f b^{- 1}$ of $pp$ collision data collected with the LHCb detector. A model-independent description of the $I ¨ (2 S) I ¨ $ mass…

Observation of excited $I^c ◯_{c}^{0}$ baryons in $I^c ◯_{b}^{-} \to I^_{c}^{+} K^{-} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +959

The first observation of the $I^c ◯_{b}^{-} \to I^_{c}^{+} K^{-} I ¨ ^{-}$ decay is reported using $pp$ collision data at centre-of-mass energies of 7, 8 and 13\, $TeV$ collected by the LHC…

Search for $A^{'} \to I^¼^{+} I^¼^{-}$ decays

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

Searches are performed for both prompt-like and long-lived dark photons, $A^{'}$ , produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look for $A…

Search for the lepton flavour violating decay $B^{+} \to K^{+} I^¼^{-} I ¨ ^{+}$ using $B_{s 2}^{* 0}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +904

A search is presented for the lepton flavour violating decay $B^{+} \to K^{+} I^¼^{-} I ¨ ^{+}$ using a sample of proton--proton collisions at centre-of-mass energies of 7, 8, and 13…

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

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

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

Angular analysis of $D^{0} \to I ¨ ^{+} I ¨ ^{-} I^¼^{+} I^¼^{-}$ and $D^{0} \to K^{+} K^{-} I^¼^{+} I^¼^{-}$ decays and search for $C P$ violation

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

The first full angular analysis and an updated measurement of the decay-rate $C P$ asymmetry of the $D^{0} \to I ¨ ^{+} I ¨ ^{-} I^¼^{+} I^¼^{-}$ and $D^{0} \to K^{+} K^{-} I^¼^{+} I^¼^{-}$ decays are reported. The…

Measurement of differential $b b ˉ$ - and $c c ˉ$ -dijet cross-sections in the forward region of $pp$ collisions at $s = 13 TeV$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +975

The inclusive $b b ˉ$ - and $c c ˉ$ -dijet production cross-sections in the forward region of $pp$ collisions are measured using a data sample collected with the LHCb detecto…

Measurement of $C P$ violation in $B^{0} \to J / I ¨ K_{S}^{0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +704

Measurements are presented of the $C P$ violation observables $S$ and $C$ in the decays of $B^{0}$ and $B^{0}$ mesons to the $J / I ¨ K_{S}^{0}$ final state. The data sample corres…

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

LHCb collaboration, R. Aaij, B. Adeva +763

The Dalitz plot analysis technique is used to study the resonant substructures of $B^{-} \to D^{+} I ¨ ^{-} I ¨ ^{-}$ decays in a data sample corresponding to 3.0 $fb^{- 1}$ of $p…

Model-independent measurement of the CKM angle $I^^{3}$ using $B^{0} \to D K^{* 0}$ decays with $D \to K_{S}^{0} I ¨ ^{+} I ¨ ^{-}$ and $K_{S}^{0} K^{+} K^{-}$

R. Aaij, C. AbellÃ¡n Beteta, B. Adeva +727

A binned Dalitz plot analysis of the decays $B^{0} \to D K^{* 0}$ , with $D \to K_{S}^{0} I ¨ ^{+} I ¨ ^{-}$ and $K_{S}^{0} K^{+} K^{-}$ , is performed to measure the observables $x_\pm…

Measurement of forward $t t$ , $W + b b$ and $W + c c$ production in $pp$ collisions at $s = 8$ TeV

LHCb collaboration, R. Aaij, B. Adeva +767

The production of $t t$ , $W + b b$ and $W + c c$ is studied in the forward region of proton-proton collisions collected at a centre-of-mass energy of 8 Te…

Observation of the $I^_{b}^{0} \to I^ I ¨ $ decay

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +730

The $I^_{b}^{0} \to I^ I ¨ $ decay is observed using data corresponding to an integrated luminosity of 3.0fb $^{- 1}$ recorded by the LHCb experiment. The decay proceeds at leading order via…

Observation of a new baryon state in the $I^_{b}^{0} I ¨ ^{+} I ¨ ^{-}$ mass spectrum

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

A new baryon state is observed in the $I^_{b}^{0} I ¨ ^{+} I ¨ ^{-}$ mass spectrum with high significance using a data sample of $pp$ collisions, collected with the LHCb detector at centre-of-ma…

Model-independent measurement of mixing parameters in $D^{0} \to K_{S} I ¨ ^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +724

The first model-independent measurement of the charm mixing parameters in the decay $D^{0} \to K_{S} I ¨ ^{+} I ¨ ^{-}$ is reported, using a sample of $pp$ collision data recorded by the LHCb…

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

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

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

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

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

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

Observation of the decay $B_{s}^{0} \to I ¨ _{c 2} K^{+} K^{-}$ in the $I ¨ $ mass region

LHCb collaboration, R. Aaij, B. Adeva +828

The $B_{s}^{0} \to I ¨ _{c 2} K^{+} K^{-}$ decay mode is observed and its branching fraction relative to the corresponding $I ¨ _{c 1}$ decay mode, in a $\pm 15 \textrm{MeV}/…

Observation of the decays $I^_{b}^{0} \to I ¨ _{c 1} p K^{-}$ and $I^_{b}^{0} \to I ¨ _{c 2} p K^{-}$

LHCb collaboration, R. Aaij, B. Adeva +776

The first observation of the decays $I^_{b}^{0} \to I ¨ _{c 1} p K^{-}$ and $I^_{b}^{0} \to I ¨ _{c 2} p K^{-}$ is reported using a data sample corresponding to an integrated luminosity of $3.0$ fb$…

hep-ex2024

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…

Measurement of forward $W \to e I^½$ production in $pp$ collisions at $s = 8$ TeV

LHCb collaboration, R. Aaij, B. Adeva +763

A measurement of the cross-section for $W \to e I^½$ production in $pp$ collisions is presented using data corresponding to an integrated luminosity of $2$ fb $^{- 1}$ collected by th…

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

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +945

The Cabibbo-suppressed decay $I^_{b}^{0} \to I ¨ _{c 1} p I ¨ ^{-}$ is observed for the first time using data from proton-proton collisions corresponding to an integrated luminosity of 6f…

Measurement of the $I^c ◯_{c}^{0}$ baryon lifetime

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

We report a measurement of the lifetime of the $I^c ◯_{c}^{0}$ baryon using proton-proton collision data at center-of-mass energies of 7 and 8~TeV, corresponding to an integrated luminosi…

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…

Precise determination of the B0s-B0sbar oscillation frequency

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +946

Mesons comprising a beauty quark and a strange quark can oscillate between particle (B0s) and antiparticle (B0s) flavour eigenstates, with a frequency given by the mass difference…

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

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

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

Measurement of the $I^¥$ polarizations in $pp$ collisions at $s$ =7 and 8TeV

LHCb collaboration, R. Aaij, B. Adeva +801

The polarization of the $I^¥ (1 S)$ , $I^¥ (2 S)$ and $I^¥ (3 S)$ mesons, produced in $pp$ collisions at centre-of-mass energies $s$ =7 and 8TeV, is measured using data samples collect…

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

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

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

Angular analysis and differential branching fraction of the decay $B_{s}^{0} \to I ¨ I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, B. Adeva +722

An angular analysis and a measurement of the differential branching fraction of the decay $B_{s}^{0} \to I ¨ I^¼^{+} I^¼^{-}$ are presented, using data corresponding to an integrated luminosity o…

Measurement of the exclusive $I^¥$ production cross-section in $pp$ collisions at $s =$ 7 TeV and 8 TeV

LHCb collaboration, R. Aaij, B. Adeva +705

A study is presented of central exclusive production of $I^¥ (n S)$ states, where the $I^¥ (n S)$ resonances decay to the $I^¼^{+} I^¼^{-}$ final state, using $pp$ collision data recorded by th…

Study of $W$ boson production in association with beauty and charm

LHCb collaboration, R. Aaij, B. Adeva +722

The associated production of a $W$ boson with a jet originating from either a light parton or heavy-flavor quark is studied in the forward region using proton-proton collisions. Th…

Observation of $J / I ¨ p$ resonances consistent with pentaquark states in $I^_{b}^{0} \to J / I ¨ K^{-} p$ decays

LHCb collaboration, R. Aaij, B. Adeva +720

Observations of exotic structures in the $J / I ¨ p$ channel, that we refer to as pentaquark-charmonium states, in $I^_{b}^{0} \to J / I ¨ K^{-} p$ decays are presented. The data sample correspon…

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

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

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

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

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

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

Measurements of prompt charm production cross-sections in $pp$ collisions at $s = 13 TeV$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +724

Production cross-sections of prompt charm mesons are measured with the first data from $pp$ collisions at the LHC at a centre-of-mass energy of $13 TeV$ . The data sample…

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

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

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

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

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

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

Search for $B_{c}^{+}$ decays to two charm mesons

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

A search for decays of $B_{c}^{+}$ mesons to two charm mesons is performed for the first time using data corresponding to an integrated luminosity of 3.0 fb $^{- 1}$ , collected by the LH…

Search for the decay $B_{s}^{0} \to D^{0} f_{0} (980)$

LHCb collaboration, R. Aaij, B. Adeva +705

A search for $B_{s}^{0} \to D^{0} f_{0} (980)$ decays is performed using $3.0 fb^{- 1}$ of $pp$ collision data recorded by the LHCb experiment during 2011 and 2012. Th…

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

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

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

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

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

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

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

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

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

First observation and measurement of the branching fraction for the decay $B_{s}^{0} \to D_{s}^{*\mp} K^{\pm}$

LHCb Collaboration, R. Aaij, B. Adeva +697

The first observation of the $B_{s}^{0} \to D_{s}^{*\mp} K^{\pm}$ decay is reported using 3.0 $f b^{- 1}$ of proton-proton collision data collected by the LHCb experiment. The $D_{s}^{*\mp}$ …

Measurement of the time-integrated $C P$ asymmetry in $D^{0} \to K_{S}^{0} K_{S}^{0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +722

The time-integrated $C P$ asymmetry in the decay $D^{0} \to K_{S}^{0} K_{S}^{0}$ is measured using $3 f b^{- 1}$ of proton-proton collision data collected by the LHCb experiment at centre-of-ma…

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

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

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

Measurement of the mass difference between neutral charm-meson eigenstates

LHCb Collaboration, R. Aaij, C. AbellÃ¡n Beteta +842

We report a measurement of the mass difference between neutral charm-meson eigenstates using a novel approach that enhances sensitivity to this parameter. We use $2.3 \times 1 0^{6}$ $…

Amplitude analysis of the $B_{(s)} \to K^{* 0} K^{* 0}$ decays and measurement of the branching fraction of the $B \to K^{* 0} K^{* 0}$ decay

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

The $B^{0} \to K^{* 0} K^{* 0}$ and $B_{s}^{0} \to K^{* 0} K^{* 0}$ decays are studied using proton-proton collision data corresponding to an integrated luminosity of 3…

Forward production of $I^¥$ mesons in $pp$ collisions at $s = 7$ and 8TeV

LHCb collaboration, R. Aaij, B. Adeva +720

The production of $I^¥$ mesons in $pp$ collisions at $= 7$ and $8 TeV$ is studied with the LHCb detector using data samples corresponding to an integrated luminosity o…

Measurement of the $J / I ¨ $ pair production cross-section in $pp$ collisions at $s = 13 TeV$

LHCb collaboration, R. Aaij, B. Adeva +763

The production cross-section of $J / I ¨ $ pairs is measured using a data sample of $pp$ collisions collected by the LHCb experiment at a centre-of-mass energy of $\sqrt{s} = 13 \,{\ma…

Measurement of the forward-backward asymmetry in $Z/Î³^{\ast} \rightarrow Î¼^{+}Î¼^{-}$ decays and determination of the effective weak mixing angle

LHCb collaboration, R. Aaij, B. Adeva +722

The forward-backward charge asymmetry for the process $q\bar{q} \rightarrow Z/Î³^{\ast} \rightarrow Î¼^{+}Î¼^{-}$ is measured as a function of the invariant mass of the dimuon syst…

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

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

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

First observation of the decay $D^{0} \to K^{-} I ¨ ^{+} I^¼^{+} I^¼^{-}$ in the $I ¨ ^{0}$ - $I ¨ $ region of the dimuon mass spectrum

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +730

A study of the decay $D^{0} \to K^{-} I ¨ ^{+} I^¼^{+} I^¼^{-}$ is performed using data collected by the LHCb detector in proton-proton collisions at a centre-of-mass energy of 8 T…

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

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

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

Evidence of a $J / I ¨ Λ$ structure and observation of excited $Ξ^{-}$ states in the $Ξ_{b}^{-} \to J / I ¨ Λ K^{-}$ decay

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +959

First evidence of a structure in the $J / I ¨ Λ$ invariant mass distribution is obtained from an amplitude analysis of $Ξ_{b}^{-} \to J / I ¨ Λ K^{-}$ decays. The observed…

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

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

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

Observation of the $B_{s}^{0} \to I^\cdot^{'} I^\cdot^{'}$ decay

LHCb collaboration, R. Aaij, B. Adeva +703

The first observation of the $B_{s}^{0} \to I^\cdot^{'} I^\cdot^{'}$ decay is reported. The study is based on a sample of proton-proton collisions corresponding to $3.0$ $f b^{- 1}$ of integrated lum…

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

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

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

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

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

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

Measurement of the inelastic $pp$ cross-section at a centre-of-mass energy of 13\,TeV

LHCb collaboration, R. Aaij, B. Adeva +782

The cross-section for inelastic proton-proton collisions at a centre-of-mass energy of 13\,TeV is measured with the LHCb detector. The fiducial cross-section for inelastic interact…

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

LHCb collaboration, R. Aaij, B. Adeva +763

A search for the charmless $B_{s}^{0} \to I^\cdot^{'} I ¨ $ decay is performed using $pp$ collision data collected by the LHCb experiment at centre-of-mass energies of $7$ and $8$ TeV…

Evidence for exotic hadron contributions to $I^_{b}^{0} \to J / I ¨ p I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +739

A full amplitude analysis of $I^_{b}^{0} \to J / I ¨ p I ¨ ^{-}$ decays is performed with a data sample acquired with the LHCb detector from 7 and 8 TeV $pp$ collisions, corresponding to an in…

Measurement of the $B_{s}^{0} \to I^¼^{+} I^¼^{-}$ branching fraction and effective lifetime and search for $B^{0} \to I^¼^{+} I^¼^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +771

A search for the rare decays $B_{s}^{0} \to I^¼^{+} I^¼^{-}$ and $B^{0} \to I^¼^{+} I^¼^{-}$ is performed at the LHCb experiment using data collected in $pp$ collisions corresponding to a total integrated…

Study of $B_{c}^{+}$ meson decays to charmonia plus multihadron final states

LHCb Collaboration, R. Aaij, A. S. W. Abdelmotteleb +1058

Four decay modes of the $B_{c}^{+}$ meson into a $J / I ¨ $ meson and multiple charged kaons or pions are studied using proton-proton collision data, collected with the~LHCb detector at ce…

First observation of the decay $B_{s}^{0} \to K_{S}^{0} K^{*} (892)^{0}$

LHCb collaboration, R. Aaij, B. Adeva +713

A search for $B_{(s)}^{0} \to K_{S}^{0} K^{*} (892)^{0}$ decays is performed using $pp$ collision data, corresponding to an integrated luminosity of $1.0 fb^{- 1}$ , collected…

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

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

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

Study of the production of $I^_{b}^{0}$ and $B^{0}$ hadrons in $pp$ collisions and first measurement of the $I^_{b}^{0} \to J / I ¨ p K^{-}$ branching fraction

LHCb collaboration, R. Aaij, B. Adeva +722

The product of the $I^_{b}^{0}$ ( $B^{0}$ ) differential production cross-section and the branching fraction of the decay $I^_{b}^{0} \to J / I ¨ p K^{-}$ ($\overline{B}^0\rightarro…

Measurement of $Z \to I ¨ ^{+} I ¨ ^{-}$ production in proton-proton collisions at $s = 8$ TeV

LHCb collaboration, R. Aaij, B. Adeva +821

A measurement of $Z \to I ¨ ^{+} I ¨ ^{-}$ production cross-section is presented using data, corresponding to an integrated luminosity of 2 fb $^{- 1}$ , from $pp$ collisions at $\sqrt{s…

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

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

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

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

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

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

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

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +995

The $I^_{cc}^{++} \to I^_{c}^{^{'} +} I ¨ ^{+}$ decay is observed using proton-proton collisions collected by the LHCb experiment at a centre-of-mass energy of $13\mathrm{\,Te\kern -0…

Search for the doubly charmed baryon $I^_{cc}^{+}$

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

A search for the doubly charmed baryon $I^_{cc}^{+}$ is performed through its decay to the $I^_{c}^{+} K^{-} I ¨ ^{+}$ final state, using proton-proton collision data collected with the LHCb…

Measurement of the branching fraction and $C P$ asymmetry in $B^{+} \to J / I ¨ I ¨ ^{+}$ decays

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

The branching fraction and direct $C P$ asymmetry of the decay $B^{+} \to J / I ¨ I ¨ ^{+}$ are measured using proton-proton collision data collected with the LHCb detector at ce…

Search for structure in the $B_{s}^{0} I ¨ ^{\pm}$ invariant mass spectrum

LHCb collaboration, R. Aaij, B. Adeva +761

The $B_{s}^{0} I ¨ ^{\pm}$ invariant mass distribution is investigated in order to search for possible exotic meson states. The analysis is based on a data sample recorded with the LHCb det…

Amplitude analysis of $B_{s}^{0} \to K_{S}^{0} K^{\pm} I ¨ ^{\mp}$ decays

LHCb Collaboration, R. Aaij, C. AbellÃ¡n Beteta +843

The first untagged decay-time-integrated amplitude analysis of $B_{s}^{0} \to K_{S}^{0} K^{\pm} I ¨ ^{\mp}$ decays is performed using a sample corresponding to $3.0\,…

Search for decays of neutral beauty mesons into four muons

LHCb collaboration, R. Aaij, B. Adeva +768

A search for the non-resonant decays $B_{s}^{0} \to I^¼^{+} I^¼^{-} I^¼^{+} I^¼^{-}$ and $B^{0} \to I^¼^{+} I^¼^{-} I^¼^{+} I^¼^{-}$ is presented. The measurement is performed using th…

Measurement of antiproton production in $pHe$ collisions at $s_{N N} = 110$ GeV

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +839

The cross-section for prompt antiproton production in collisions of protons with an energy of $6.5$ TeV incident on helium nuclei at rest is measured with the LHCb experiment from…

Improved limit on the branching fraction of the rare decay $K_{S}^{0} \to I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, B. Adeva +767

A search for the decay $K_{S}^{0} \to I^¼^{+} I^¼^{-}$ is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3 fb$^{…

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

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

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

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

LHCb collaboration, R. Aaij, B. Adeva +755

The ratio of branching fractions $R_{K / I ¨ } \equiv B (B_{c}^{+} \to J / I ¨ K^{+}) / B (B_{c}^{+} \to J / I ¨ I ¨ ^{+})$ is measured with $pp$ collision data collected by the…

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

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

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

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

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

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

Observation of $B_{c}^{+} \to J / I ¨ D^{()} K^{()}$ decays

LHCb collaboration, R. Aaij, B. Adeva +764

A search for the decays $B_{c}^{+} \to J / I ¨ D^{(*) 0} K^{+}$ and $B_{c}^{+} \to J / I ¨ D^{(*) +} K^{* 0}$ is performed with data collected at the LHCb experiment corresponding to an integrated lumi…

Measurement of the forward $Z$ boson production cross-section in $pp$ collisions at $s$ = 7 TeV

LHCb collaboration, R. Aaij, B. Adeva +705

A measurement of the production cross-section for $Z$ bosons that decay to muons is presented. The data were recorded by the LHCb detector during $pp$ collisions at a centre-of-mas…

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

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

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

hep-ex2024

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

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

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

Associated production of prompt $J / I ¨ $ and $I^¥$ mesons in $pp$ collisions at $s = 13 TeV$

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

The associated production of prompt $J / I ¨ $ and $I^¥$ mesons in $pp$ collisions at a centre-of-mass energy of $s = 13 TeV$ is studied using LHCb data,…

nucl-ex2023

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

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

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

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

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

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

Near-threshold $D D ˉ$ spectroscopy and observation of a new charmonium state

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

Using proton-proton collision data, corresponding to an integrated luminosity of 9 $f b^{- 1}$ , collected with the~LHCb detector between 2011 and 2018, a new narrow charmonium state,…

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

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +957

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

Search for long-lived particles decaying to $e^{\pm} I^¼^{\mp} I^½$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +975

Long-lived particles decaying to $e^{\pm} I^¼^{\mp} I^½$ , with masses between 7 and $50$ GeV/c $^{2}$ and lifetimes between 2 and $50$ ps, are searched for by looking at displaced vertices…

Differential branching fraction and angular moments analysis of the decay $B^{0} \to K^{+} I ¨ ^{-} I^¼^{+} I^¼^{-}$ in the $K_{0, 2}^{*} (1430)^{0}$ region

LHCb collaboration, R. Aaij, B. Adeva +762

Measurements of the differential branching fraction and angular moments of the decay $B^{0} \to K^{+} I ¨ ^{-} I^¼^{+} I^¼^{-}$ in the $K^{+} I ¨ ^{-}$ invariant mass range $1330<m(K^+ Ï^-)<1530~MeV/c…

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

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

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

Measurement of the $I^_{b}^{0} \to J / I ¨ I^$ angular distribution and the $I^_{b}^{0}$ polarisation in $pp$ collisions

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +912

This paper presents an analysis of the $I^_{b}^{0} \to J / I ¨ I^$ angular distribution and the transverse production polarisation of $I^_{b}^{0}$ baryons in proton-proton collisions at…

First experimental study of photon polarization in radiative $B_{s}^{0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +765

The polarization of photons produced in radiative $B_{s}^{0}$ decays is studied for the first time. The data are recorded by the LHCb experiment in $pp$ collisions corresponding to…

Observation of $B_{(s)}^{0} \to J / I ¨ p p$ decays and precision measurements of the $B_{(s)}^{0}$ masses

LHCb Collaboration, R. Aaij, C. AbellÃ¡n Beteta +843

The first observation of the decays $B_{(s)}^{0} \to J / I ¨ p p$ is reported, using proton-proton collision data corresponding to an integrated luminosity of $5.2{\text{\,fb}…

nucl-ex2016

Study of $I ¨ (2 S)$ production and cold nuclear matter effects in pPb collisions at $s_{N N} = 5 TeV$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +732

The production of $I ¨ (2 S)$ mesons is studied in dimuon final states using proton-lead collision data collected by the LHCb detector. The data sample corresponds to an integrated lu…

Observation of the suppressed decay $I^_{b}^{0} \to p I ¨ ^{-} I^¼^{+} I^¼^{-}$

LHCb collaboration, R. Aaij, B. Adeva +768

The suppressed decay $I^_{b}^{0} \to p I ¨ ^{-} I^¼^{+} I^¼^{-}$ , excluding the $J / I ¨ $ and $I ¨ (2 S) \to I^¼^{+} I^¼^{-}$ resonances, is observed for the first time with a signif…