S. Baker

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…

astro-ph.GA2022

Gaia Data Release 3: G_RVS photometry from the RVS spectra

P. Sartoretti, O. Marchal, C. Babusiaux +38

Gaia Data Release 3 (DR3) contains the first release of magnitudes estimated from the integration of Radial Velocity Spectrometer (RVS) spectra for a sample of about 32.2 million s…

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…

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…

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…

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$…

physics.ins-det2022

Performance of the LHCb RICH detectors during LHC Run 2

R. Calabrese, M. Fiorini, E. Luppi +79

The performance of the ring-imaging Cherenkov detectors at the LHCb experiment is determined during the LHC Run 2 period between 2015 and 2018. The stability of the Cherenkov angle…

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…

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…

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,…

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…

astro-ph.GA2018

Gaia Data Release 2: Processing the spectroscopic data

P. Sartoretti, D. Katz, M. Cropper +50

The Gaia Data Release 2 contains the 1st release of radial velocities complementing the kinematic data of a sample of about 7 million relatively bright, late-type stars. Aims: This…

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…

physics.acc-ph1999

Beam extraction studies at 900 GeV using a channeling crystal

R. A. Carrigan, D. Chen, G. Jackson +23

Luminosity-driven channeling extraction has been observed for the first time in a 900 GeV study at the Fermilab Tevatron. This experiment, Fermilab E853, demonstrated that useful T…

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…

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…

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…

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…

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…

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…

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…

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…

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$^{…

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 $C P$ 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…

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…

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}…

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…

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

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

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

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

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

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

Measurement of the $C P$ violation parameter $A_{I^} $ in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to I ¨ ^{+} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +769

Asymmetries in the time-dependent rates of $D^{0} \to K^{+} K^{-}$ and $D^{0} \to I ¨ ^{+} I ¨ ^{-}$ decays are measured in a $pp$ collision data sample collected with the LHCb detector during LHC R…

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

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

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

Measurement of the $b$ -quark production cross-section in 7 and 13 TeV $pp$ collisions

LHCb collaboration, R. Aaij, B. Adeva +766

Measurements of the cross-section for producing \bquark quarks in the reaction $pp \to b b ˉ X$ are reported in 7 and 13 TeV collisions at the LHC as a function of the pseudorapi…

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

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

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

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

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

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

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

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

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

Study of the lineshape of the $I ¨ _{c 1} (3872)$ state

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +965

A study of the lineshape of the $I ¨ _{c 1} (3872)$ state is made using a data sample corresponding to an integrated luminosity of $3$ fb $^{- 1}$ collected in $pp$ collisions at centre…

Study of $J / I ¨ $ production in jets

LHCb collaboration, R. Aaij, B. Adeva +774

The production of $J / I ¨ $ mesons in jets is studied in the forward region of proton-proton collisions using data collected with the LHCb detector at a center-of-mass energy of 13 Te…

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

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

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

Observation of the decay $B_{s}^{0} \to I^\cdot_{c} I ¨ $ and evidence for $B_{s}^{0} \to I^\cdot_{c} I ¨ ^{+} I ¨ ^{-}$

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

A study of $B_{s}^{0} \to I^\cdot_{c} I ¨ $ and $B_{s}^{0} \to I^\cdot_{c} I ¨ ^{+} I ¨ ^{-}$ decays is performed using $pp$ collision data corresponding to an integrated luminosity of 3.0$\,\rm fb…

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

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

A search for $C P$ violation in $I^_{b}^{0} \to p K^{-}$ and $I^_{b}^{0} \to p I ¨ ^{-}$ decays is presented using a sample of $pp$ collisions collected with the LHCb detector and corresponding…

astro-ph.SR2022

Gaia Data Release 3: Hot-star radial velocities

R. Blomme, Y. Fremat, P. Sartoretti +38

The second Gaia data release, DR2, contained radial velocities of stars with effective temperatures up to Teff = 6900 K. The third data release, Gaia DR3, extends this up to Teff =…

Observation of five new narrow $I^c ◯_{c}^{0}$ states decaying to $I^_{c}^{+} K^{-}$

LHCb collaboration, R. Aaij, B. Adeva +772

The $I^_{c}^{+} K^{-}$ mass spectrum is studied with a sample of $pp$ collision data corresponding to an integrated luminosity of 3.3 fb $^{- 1}$ , collected by the LHCb experiment. The $Î…

Measurement of the ratio of branching fractions and difference in $C P$ asymmetries of the decays $B^{+} \to J / I ¨ I ¨ ^{+}$ and $B^{+} \to J / I ¨ K^{+}$

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

The ratio of branching fractions and the difference in $C P$ asymmetries of the decays $B^{+} \to J / I ¨ I ¨ ^{+}$ and $B^{+} \to J / I ¨ K^{+}$ are measured using a data sample of $pp$ collisions col…

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

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

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

Observation of $C P$ violation in charm decays

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

A search for charge-parity ( $C P$ ) violation in $D^{0} \to K^{-} K^{+}$ and $D^{0} \to I ¨ ^{-} I ¨ ^{+}$ decays is reported, using $pp$ collision data corresponding to an integrated luminosity o…

Observation of the decay $I^_{b}^{0} \to I ¨ (2 S) p I ¨ ^{-}$

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

The Cabibbo-suppressed decay $I^_{b}^{0} \to I ¨ (2 S) p I ¨ ^{-}$ is observed for the first time using a data sample collected by the LHCb experiment in proton-proton collisions correspo…

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

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

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

Updated search for long-lived particles decaying to jet pairs

LHCb collaboration, R. Aaij, B. Adeva +766

A search is presented for long-lived particles with a mass between 25 and 50 GeV/ $c^{2}$ and a lifetime between 2 and 500 ps, using proton-proton collision data corresponding to an i…

Search for $B_{c}^{+}$ decays to the $p p ˉ I ¨ ^{+}$ final state

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

A search for the decays of the $B_{c}^{+}$ meson to $p p ˉ I ¨ ^{+}$ is performed for the first time using a data sample corresponding to an integrated luminosity of 3.0 $\mathrm{fb}^{-1}…

hep-th1995

Integrable Quartic Potentials and Coupled KdV Equations

S. Baker, V. Z. Enolskii, A. P. Fordy

We show a surprising connection between known integrable Hamiltonian systems with quartic potential and the stationary flows of some coupled KdV systems related to fourth order Lax…

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

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

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

Measurement of $C P$ asymmetries in $D^{\pm} \to I^\cdot^{'} I ¨ ^{\pm}$ and $D_{s}^{\pm} \to I^\cdot^{'} I ¨ ^{\pm}$ decays

LHCb collaboration, R. Aaij, B. Adeva +770

A search for $C P$ violation in $D^{\pm} \to I^\cdot^{'} I ¨ ^{\pm}$ and $D_{s}^{\pm} \to I^\cdot^{'} I ¨ ^{\pm}$ decays is performed using proton-proton collision data, c…

Prompt $I^_{c}^{+}$ production in $p Pb$ collisions at $s_{N N} = 5.02$ TeV

LHCb collaboration, R. Aaij, B. Adeva +832

The production of $I^_{c}^{+}$ baryons produced directly at the interacting point is studied in proton-lead collisions collected with the LHCb detector at the LHC. The data sample corr…

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

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

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

astro-ph.IM2018

Gaia Data Release 2. Calibration and mitigation of electronic offset effects in the data

N. C. Hambly, M. Cropper, S. Boudreault +30

The European Space Agency Gaia satellite was launched into orbit around L2 in December 2013. This ambitious mission has strict requirements on residual systematic errors resulting…

Search for excited $B_{c}^{+}$ states

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

A search is performed in the invariant mass spectrum of the $B_{c}^{+} I ¨ ^{+} I ¨ ^{-}$ system for the excited $B_{c}^{+}$ states $B_{c} (2^{1} S_{0})^{+}$ and $B_{c} (2^{3} S_{1})^{+}$ using a data s…

Prompt and nonprompt J/ $I ¨ $ production and nuclear modification in $p$ Pb collisions at $s_{NN} = 8.16$ TeV

LHCb collaboration, R. Aaij, B. Adeva +806

The production of J/ $I ¨ $ mesons is studied in proton-lead collisions at the centre-of-mass energy per nucleon pair $s_{NN} = 8.16$ TeV with the LHCb detector at the LHC…

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

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

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

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

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

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

Search for massive long-lived particles decaying semileptonically in the LHCb detector

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

A search is presented for massive long-lived particles decaying into a muon and two quarks. The dataset consists of proton-proton interactions at centre-of-mass energies of 7 and 8…

Measurement of $C P$ observables in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D I ¨ ^{\pm}$ with $D \to K_{S}^{0} K^{\pm} I ¨ ^{\mp}$ decays

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

Measurements of $C P$ observables in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D I ¨ ^{\pm}$ decays are presented, where $D$ represents a superposition of $D^{0}$ and $D ˉ^{0}$ states. The $D$ …

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

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

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

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

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

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

Model-independent evidence for $J / I ¨ p$ contributions to $I^_{b}^{0} \to J / I ¨ p K^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +731

The data sample of $I^_{b}^{0} \to J / I ¨ p K^{-}$ decays acquired with the LHCb detector from 7 and 8~TeV $pp$ collisions, corresponding to an integrated luminosity of 3 fb $^{- 1}$ , is inspe…

First observation of a baryonic $B_{s}^{0}$ decay

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

We report the first observation of a baryonic $B_{s}^{0}$ decay, $B_{s}^{0} \to p I^ K^{-}$ , using proton-proton collision data recorded by the LHCb experim…

Observation of new resonances decaying to $J / I ¨ K^{+}$ and $J / I ¨ I ¨ $

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

The first observation of exotic states with a new quark content $c c ˉ u s ˉ$ decaying to the $J / I ¨ K^{+}$ final state is reported with high significance from an amplitude ana…

Measurement of the branching fractions of the decays $D^{+} \to K^{-} K^{+} K^{+}$ , $D^{+} \to I ¨ ^{-} I ¨ ^{+} K^{+}$ and $D_{s}^{+} \to I ¨ ^{-} K^{+} K^{+}$

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

The branching fractions of the doubly Cabibbo-suppressed decays $D^{+} \to K^{-} K^{+} K^{+}$ , $D^{+} \to I ¨ ^{-} I ¨ ^{+} K^{+}$ and $D_{s}^{+} \to I ¨ ^{-} K^{+} K^{+}$ are measured using the dec…

Measurement of the shape of the $B_{s}^{0} \to D_{s}^{*-} I^¼^{+} I^½_{I^} ¼$ differential decay rate

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

The shape of the $B_{s}^{0} \to D_{s}^{*-} I^¼^{+} I^½_{I^} ¼$ differential decay rate is obtained as a function of the hadron recoil using proton-proton collision data at a centre-of-mass…