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Publications (59)

hep-ex2021

Precise measurement of the $f_{s} / f_{d}$ ratio of fragmentation fractions and of $B_{s}^{0}$ decay branching fractions

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +955

The ratio of the $B_{s}^{0}$ and $B^{0}$ fragmentation fractions, $f_{s} / f_{d}$ , in proton-proton collisions at the LHC, is obtained as a function of $B$ -meson transverse momentum and collis…

hep-ex2021

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 $5.6 fb^{- 1}$ …

hep-ex2020

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…

hep-ex2021

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…

hep-ex2020

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…

hep-ex2020

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…

hep-ex2020

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…

hep-ex2021

Measurement of $C P$ observables in $B^{\pm} \to D^{()} K^{\pm}$ and $B^{\pm} \to D^{()} I ¨ ^{\pm}$ decays using two-body $D$ final states

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

Measurements of $C P$ observables in $B^{\pm} \to D^{(*)} K^{\pm}$ and $B^{\pm} \to D^{(*)} I ¨ ^{\pm}$ decays are presented, where $D^{(*)}$ indicates a neutral $D$ or $D^*…

hep-ex2021

First measurement of the $C P$ -violating phase in $B_{s}^{0} \to J / I ¨ (\to e^{+} e^{-}) I ¨ $ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +954

A flavour-tagged time-dependent angular analysis of $B_{s}^{0} \to J / I ¨ I ¨ $ decays is presented where the $J / I ¨ $ meson is reconstructed through its decay to an $e^{+} e^{-}$ pair. The analysi…

hep-ex2020

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…

hep-ex2020

Model-independent study of structure in $B^{+} \to D^{+} D^{-} K^{+}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +963

The only anticipated resonant contributions to $B^{+} \to D^{+} D^{-} K^{+}$ decays are charmonium states in the $D^{+} D^{-}$ channel. A model-independent analysis, using LHCb proton-proton colli…

hep-ex2020

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…

hep-ex2020

Observation of structure in the $J / I ¨ $ -pair mass spectrum

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +964

Using proton-proton collision data at centre-of-mass energies of $s = 7$ , $8$ and $13 TeV$ recorded by the LHCb experiment at the Large Hadron Collider, correspond…

hep-ex2021

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…

hep-ex2021

Observation of $C P$ violation in two-body $B_{(s)}^{0}$ -meson decays to charged pions and kaons

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +966

The time-dependent $C P$ asymmetries of $B^{0} \to I ¨ ^{+} I ¨ ^{-}$ and $B_{s}^{0} \to K^{+} K^{-}$ decays are measured using a data sample of $pp$ collisions corresponding to an integrated…

hep-ex2020

Measurement of $C P$ -averaged observables in the $B^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$ decay

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +902

An angular analysis of the $B^{0} \to K^{* 0} (\to K^{+} I ¨ ^{-}) I^¼^{+} I^¼^{-}$ decay is presented using a data set corresponding to an integrated luminosity of 4.7 fb $^{- 1}$ of…

hep-ex2020

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…

hep-ex2021

Study of the $I ¨ _{2} (3823)$ and $I ¨ _{c 1} (3872)$ states in $B^{+} \to (J I ¨ I ¨ ^{+} I ¨ ^{-}) K^{+}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +956

The decays $B^{+} \to J / I ¨ I ¨ ^{+} I ¨ ^{-} K^{+}$ are studied using a data set corresponding to an integrated luminosity of 9fb $^{- 1}$ collected with the LHCb detector in proton-proton…

hep-ex2021

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…

hep-ex2020

Search for the doubly heavy $I^_{b c}^{0}$ baryon via decays to $D^{0} p K^{-}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +987

A search for the doubly heavy $I^_{b c}^{0}$ baryon using its decay to the $D^{0} p K^{-}$ final state is performed using proton-proton collision data at a centre-of-mass energy of…

hep-ex2021

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

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +961

Using $pp$ collision data corresponding to an integrated luminosity of $5.4 fb^{- 1}$ collected with the LHCb detector at a center-of-mass energy of $13 TeV$ , the $B^0…

hep-ex2021

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…

hep-ex2020

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…

hep-ex2021

Study of $B_{s}^{0} \to J / I ¨ I ¨ ^{+} I ¨ ^{-} K^{+} K^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +958

The decays $B_{s}^{0} \to J / I ¨ I ¨ ^{+} I ¨ ^{-} K^{+} K^{-}$ are studied using a data set corresponding to an integrated luminosity of 9fb $^{- 1}$ , collected with the LHCb detector in proton…

hep-ex2020

First branching fraction measurement of the suppressed decay $I^_{c}^{0} \to I ¨ ^{-} I^_{c}^{+}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +963

The $I^_{c}^{0}$ baryon is unstable and usually decays into charmless final states by the $c \to s u d$ transition. It can, however, also disintegrate into a $I ¨ ^{-}$ meson and…

hep-ex2020

Strong constraints on the $b \to s I^^{3}$ photon polarisation from $B^{0} \to K^{* 0} e^{+} e^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +976

An angular analysis of the $B^{0} \to K^{* 0} e^{+} e^{-}$ decay is performed using a data sample corresponding to an integrated luminosity of $9 fb^{- 1}$ of $pp$ collisions collect…

hep-ex2021

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…

hep-ex2020

Search for $C P$ violation in $I^_{c}^{+} \to p K^{-} I ¨ ^{+}$ decays using model-independent techniques

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +950

A first search for $C P$ violation in the Cabibbo-suppressed $I^_{c}^{+} \to p K^{-} I ¨ ^{+}$ decay is performed using both a binned and an unbinned model-independent technique in the D…

hep-ex2020

Precision measurement of the $I^_{cc}^{++}$ mass

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

A measurement of the $I^_{cc}^{++}$ mass is performed using data collected by the LHCb experiment between 2016 and 2018 in $pp$ collisions at a centre-of-mass energy of 13 TeV, cor…

hep-ex2021

Observation of multiplicity-dependent prompt $I ¨ _{c 1} (3872)$ and $I ¨ (2 S)$ production in $pp$ collisions

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +968

The production of $I ¨ _{c 1} (3872)$ and $I ¨ (2 S)$ hadrons is studied as a function of charged particle multiplicity in $pp$ collisions at a center-of-mass energy of 8 TeV, correspondi…

hep-ex2020

Search for the rare decays $B_{s}^{0} \to e^{+} e^{-}$ and $B^{0} \to e^{+} e^{-}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +902

A search for the decays $B_{s}^{0} \to e^{+} e^{-}$ and $B^{0} \to e^{+} e^{-}$ is performed using data collected with the LHCb experiment in proton-proton collisions at center-of-mass energies of $…

hep-ex2020

First observation of the decay $I^_{b}^{0} \to I^\cdot_{c} (1 S) p K^{-}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +985

The decay $I^_{b}^{0} \to I^\cdot_{c} (1 S) p K^{-}$ is observed for the first time using a data sample of proton-proton collisions, corresponding to an integrated luminosity of 5.5 $f b^{- 1}$ , co…

hep-ex2021

Measurement of the CKM angle $I^^{3}$ and $B_{s}^{0}$ - $B ˉ_{s}^{0}$ mixing frequency with $B_{s}^{0} \to D_{s}^{\mp} h^{\pm} I ¨ ^{\pm} I ¨ ^{\mp}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +963

The CKM angle $I^^{3}$ is measured for the first time from mixing-induced $C P$ violation between $B_{s}^{0} \to D_{s}^{\mp} K^{\pm} I ¨ ^{\pm} I ¨ ^{\mp}$ and $\bar{B}^0_s \rightarrow D_s^\pm K^…

hep-ex2021

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 $…

hep-ex2020

First observation of excited $I^c ◯_{b}^{-}$ states

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

We report four narrow peaks in the $I^_{b}^{0} K^{-}$ mass spectrum obtained using $pp$ collisions at center-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated lumin…

hep-ex2021

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…

hep-ex2021

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

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

The $Λ_{b}^{0} \to Λ_{c}^{+} K^{+} K^{-} I ¨ ^{-}$ decay is observed for the first time using a data sample of proton-proton collisions at centre-of-mass energies of $s = 7$ …

hep-ex2021

Search for heavy neutral leptons in $W^{+} \to I^¼^{+} I^¼^{\pm} jet$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +980

A search is performed for heavy neutrinos in the decay of a $W$ boson into two muons and a jet. The data set corresponds to an integrated luminosity of approximately $3.0 \text{ fb…

hep-ex2020

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 $D$ …

hep-ex2021

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…

hep-ex2020

Amplitude analysis of the $B^{+} \to D^{+} D^{-} K^{+}$ decay

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +963

Results are reported from an amplitude analysis of the $B^{+} \to D^{+} D^{-} K^{+}$ decay. The analysis is carried out using LHCb proton-proton collision data taken at $s = 7, 8,$ and $1…

hep-ex2021

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…

hep-ex2021

Search for time-dependent $C P$ violation in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to I ¨ ^{+} I ¨ ^{-}$ decays

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

A search for time-dependent violation of the charge-parity symmetry in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to I ¨ ^{+} I ¨ ^{-}$ decays is performed at the LHCb experiment using proton-proton coll…

hep-ex2021

Observation of the $B_{s}^{0} \to D^{*\pm} D^{\mp}$ decay

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +963

A search for the $B_{s}^{0} \to D^{*\pm} D^{\mp}$ decay is performed using proton-proton collision data at centre-of-mass energies of $7$ , $8$ and $13 TeV$ collected by…

hep-ex2021

Measurement of the branching fraction of the $B^{0} \to D_{s}^{+} I ¨ ^{-}$ decay

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +949

A branching fraction measurement of the $B^{0} \to D_{s}^{+} I ¨ ^{-}$ decay is presented using proton-proton collision data collected with the LHCb experiment, corresponding t…

hep-ex2021

First observation of the decay $B_{s}^{0} \to K^{-} I^¼^{+} I^½_{I^} ¼$ and a measurement of $∣ V_{u b} ∣/∣ V_{c b} ∣$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +961

The first observation of the suppressed semileptonic $B_{s}^{0} \to K^{-} I^¼^{+} I^½_{I^} ¼$ decay is reported. Using a data sample recorded in {\it pp} collisions in 2012 with the LHCb detector,…

hep-ex2021

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

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +955

A measurement of the $C P$ asymmetry in $D^{0} \to K_{S}^{0} K_{S}^{0}$ decays is reported, based on a data sample of proton-proton collisions collected by the LHCb experiment from 2015 to 20…

hep-ex2020

First observation of the decay $B^{0} \to D^{0} D^{0} K^{+} I ¨ ^{-}$

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

The first observation of the decay $B^{0} \to D^{0} D^{0} K^{+} I ¨ ^{-}$ is reported using proton-proton collision data corresponding to an integrated luminosity of 4.7 $…

hep-ex2021

Observation of a new $I^_{b}^{0}$ state

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

Using a proton-proton collision data sample collected by the LHCb experiment, corresponding to an integrated luminosity of 8.5 fb $^{- 1}$ , the observation of a new excited $I^_{b}^{0}$ …

hep-ex2020

Isospin amplitudes in $I^_{b}^{0} \to J / I ¨ I^ (I^£^{0})$ and $I^_{b}^{0} \to J / I ¨ I^^{0} (I^)$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +902

Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions, and allow searches for physics beyond the Standard Model. We…

hep-ex2020

Searches for 25 rare and forbidden decays of $D^{+}$ and $D_{s}^{+}$ mesons

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +998

A search is performed for rare and forbidden charm decays of the form $D_{(s)}^{+} \to h^{\pm} ℓ^{+} ℓ^{(') \mp}$ , where $h^{\pm}$ is a pion or kaon and $ℓ^{(^{'}) \pm}$ is an ele…

hep-ex2021

Measurement of the CKM angle $I^^{3}$ in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D I ¨ ^{\pm}$ decays with $D \to K_{S}^{0} h^{+} h^{-}$

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

A measurement of $C P$ -violating observables is performed using the decays $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D I ¨ ^{\pm}$ , where the $D$ meson is reconstructed in one of the self-conjug…

hep-ex2020

Searches for low-mass dimuon resonances

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

Searches are performed for a low-mass dimuon resonance, $X$ , produced in proton-proton collisions at a center-of-mass energy of 13 TeV, using a data sample corresponding to an inte…

hep-ex2020

Measurement of $∣ V_{c b} ∣$ with $B_{s}^{0} \to D_{s}^{(*) -} I^¼^{+} I^½_{I^} ¼$ decays

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

The element $∣ V_{c b} ∣$ of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic $B_{s}^{0}$ decays produced in proton-proton collision data collected with the LHCb detect…

hep-ex2021

Search for the rare decay $B^{0} \to J / I ¨ I ¨ $

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +962

A search for the rare decay $B^{0} \to J / I ¨ I ¨ $ is performed using $pp$ collision data collected with the LHCb detector at centre-of-mass energies of 7, 8 and 13 TeV, correspo…

hep-ex2021

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

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

We present an angular analysis of the $B^{+} \to K^{*+} (\to K_{S}^{0} I ¨ ^{+}) I^¼^{+} I^¼^{-}$ decay using 9$\,\mbox{fb}^{-1}$ of $pp$ collision data collected with th…

hep-ex2020

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…

hep-ex2021

Search for the doubly heavy baryons $I^c ◯_{bc}^{0}$ and $I^_{bc}^{0}$ decaying to $I^_{c}^{+} I ¨ ^{-}$ and $I^_{c}^{+} I ¨ ^{-}$

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +900

The first search for the doubly heavy $I^c ◯_{bc}^{0}$ baryon and a search for $I^_{bc}^{0}$ baryon are performed using $pp$ collision data collected via the LHCb experime…

hep-ex2021

Measurement of branching fraction ratios for $B^{+} \to D^{+} D^{-} K^{+}$ , $B^{+} \to D^{-} D^{+} K^{+}$ , and $B^{0} \to D^{*-} D^{0} K^{+}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +914

A measurement of four branching-fraction ratios for three-body decays of $B$ mesons involving two open-charm hadrons in the final state is presented. Run 1 and Run 2 $pp$ collision…

Publications (59)

Precise measurement of the fs​/fd​ ratio of fragmentation fractions and of Bs0​ decay branching fractions

Constraints on the KS0​→I^¼+I^¼− branching fraction

Measurement of the relative branching fractions of B+→h+h′+h′− decays

Search for long-lived particles decaying to e±I^¼∓I^½

Test of lepton universality with I^b0​→pK−ℓ+ℓ− decays

Observation of enhanced double parton scattering in proton-lead collisions at sNN​​=8.16 TeV

Measurement of the I^b0​→J/I¨I^ angular distribution and the I^b0​ polarisation in pp collisions

Measurement of CP observables in B±→D(∗)K± and B±→D(∗)I¨± decays using two-body D final states

First measurement of the CP-violating phase in Bs0​→J/I¨(→e+e−)I¨ decays

Precision measurement of the Bc+​ meson mass

Model-independent study of structure in B+→D+D−K+ decays

Search for the lepton flavour violating decay B+→K+I^¼−I¨+ using Bs2∗0​ decays

Observation of structure in the J/I¨-pair mass spectrum

Measurement of differential bbˉ- and ccˉ-dijet cross-sections in the forward region of pp collisions at s​=13 TeV

Observation of CP violation in two-body B(s)0​-meson decays to charged pions and kaons

Measurement of CP-averaged observables in the B0→K∗0I^¼+I^¼− decay

Observation of a new baryon state in the I^b0​I¨+I¨− mass spectrum

Study of the I¨2​(3823) and I¨c1​(3872) states in B+→(JI¨I¨+I¨−)K+ decays

Observation of new excited Bs0​ states

Search for the doubly heavy I^bc0​ baryon via decays to D0pK−

Observation of a new excited Ds+​ meson in B0→D−D+K+I¨− decays

Study of the lineshape of the I¨c1​(3872) state

Observation of new I^c0​ baryons decaying to I^c+​K−

Study of Bs0​→J/I¨I¨+I¨−K+K− decays

First branching fraction measurement of the suppressed decay I^c0​→I¨−I^c+​

Strong constraints on the b→sI^3 photon polarisation from B0→K∗0e+e− decays

Measurement of CP violation in the decay B+→K+I¨0

Search for CP violation in I^c+​→pK−I¨+ decays using model-independent techniques

Precision measurement of the I^cc++​ mass

Observation of multiplicity-dependent prompt I¨c1​(3872) and I¨(2S) production in pp collisions

Search for the rare decays Bs0​→e+e− and B0→e+e−

First observation of the decay I^b0​→I^⋅c​(1S)pK−

Measurement of the CKM angle I^3 and Bs0​-Bˉs0​ mixing frequency with Bs0​→Ds∓​h±I¨±I¨∓ decays

Measurement of the prompt-production cross-section ratio I¨(I¨c2​)/I¨(I¨c1​) in pPb collisions at sNN​​ = 8.16 TeV

First observation of excited I^c◯b−​ states

Evidence of a J/I¨Λ structure and observation of excited Ξ− states in the Ξb−​→J/I¨ΛK− decay

Observation of the Λb0​→Λc+​K+K−I¨− decay

Search for heavy neutral leptons in W+→I^¼+I^¼±jet decays

Measurement of CP observables in B±→DK± and B±→DI¨± with D→KS0​K±I¨∓ decays

Observation of new resonances decaying to J/I¨K+ and J/I¨I¨

Amplitude analysis of the B+→D+D−K+ decay

Measurement of the shape of the Bs0​→Ds∗−​I^¼+I^½I^​¼ differential decay rate

Search for time-dependent CP violation in D0→K+K− and D0→I¨+I¨− decays

Observation of the Bs0​→D∗±D∓ decay

Measurement of the branching fraction of the B0→Ds+​I¨− decay

First observation of the decay Bs0​→K−I^¼+I^½I^​¼ and a measurement of ∣Vub​∣/∣Vcb​∣

Measurement of CP asymmetry in D0→KS0​KS0​ decays

First observation of the decay B0→D0D0K+I¨−

Observation of a new I^b0​ state

Isospin amplitudes in I^b0​→J/I¨I^(I^£0) and I^b0​→J/I¨I^0(I^) decays

Searches for 25 rare and forbidden decays of D+ and Ds+​ mesons

Measurement of the CKM angle I^3 in B±→DK± and B±→DI¨± decays with D→KS0​h+h−

Searches for low-mass dimuon resonances

Measurement of ∣Vcb​∣ with Bs0​→Ds(∗)−​I^¼+I^½I^​¼ decays

Search for the rare decay B0→J/I¨I¨

Angular analysis of the B+→K∗+I^¼+I^¼− decay

Measurement of fs​/fu​ variation with proton-proton collision energy and B-meson kinematics

Search for the doubly heavy baryons I^c◯bc0​ and I^bc0​ decaying to I^c+​I¨− and I^c+​I¨−

Measurement of branching fraction ratios for B+→D∗+D−K+, B+→D∗−D+K+, and B0→D∗−D0K+ decays

Precise measurement of the $f_{s} / f_{d}$ ratio of fragmentation fractions and of $B_{s}^{0}$ decay branching fractions

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

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

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

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

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

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

Measurement of $C P$ observables in $B^{\pm} \to D^{()} K^{\pm}$ and $B^{\pm} \to D^{()} I ¨ ^{\pm}$ decays using two-body $D$ final states

First measurement of the $C P$ -violating phase in $B_{s}^{0} \to J / I ¨ (\to e^{+} e^{-}) I ¨ $ decays

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

Model-independent study of structure in $B^{+} \to D^{+} D^{-} K^{+}$ decays

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

Observation of structure in the $J / I ¨ $ -pair mass spectrum

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

Observation of $C P$ violation in two-body $B_{(s)}^{0}$ -meson decays to charged pions and kaons

Measurement of $C P$ -averaged observables in the $B^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$ decay

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

Study of the $I ¨ _{2} (3823)$ and $I ¨ _{c 1} (3872)$ states in $B^{+} \to (J I ¨ I ¨ ^{+} I ¨ ^{-}) K^{+}$ decays

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

Search for the doubly heavy $I^_{b c}^{0}$ baryon via decays to $D^{0} p K^{-}$

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

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

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

Study of $B_{s}^{0} \to J / I ¨ I ¨ ^{+} I ¨ ^{-} K^{+} K^{-}$ decays

First branching fraction measurement of the suppressed decay $I^_{c}^{0} \to I ¨ ^{-} I^_{c}^{+}$

Strong constraints on the $b \to s I^^{3}$ photon polarisation from $B^{0} \to K^{* 0} e^{+} e^{-}$ decays

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

Search for $C P$ violation in $I^_{c}^{+} \to p K^{-} I ¨ ^{+}$ decays using model-independent techniques

Precision measurement of the $I^_{cc}^{++}$ mass

Observation of multiplicity-dependent prompt $I ¨ _{c 1} (3872)$ and $I ¨ (2 S)$ production in $pp$ collisions

Search for the rare decays $B_{s}^{0} \to e^{+} e^{-}$ and $B^{0} \to e^{+} e^{-}$

First observation of the decay $I^_{b}^{0} \to I^\cdot_{c} (1 S) p K^{-}$

Measurement of the CKM angle $I^^{3}$ and $B_{s}^{0}$ - $B ˉ_{s}^{0}$ mixing frequency with $B_{s}^{0} \to D_{s}^{\mp} h^{\pm} I ¨ ^{\pm} I ¨ ^{\mp}$ decays

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

First observation of excited $I^c ◯_{b}^{-}$ states

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

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

Search for heavy neutral leptons in $W^{+} \to I^¼^{+} I^¼^{\pm} jet$ decays

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

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

Amplitude analysis of the $B^{+} \to D^{+} D^{-} K^{+}$ decay

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

Search for time-dependent $C P$ violation in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to I ¨ ^{+} I ¨ ^{-}$ decays

Observation of the $B_{s}^{0} \to D^{*\pm} D^{\mp}$ decay

Measurement of the branching fraction of the $B^{0} \to D_{s}^{+} I ¨ ^{-}$ decay

First observation of the decay $B_{s}^{0} \to K^{-} I^¼^{+} I^½_{I^} ¼$ and a measurement of $∣ V_{u b} ∣/∣ V_{c b} ∣$

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

First observation of the decay $B^{0} \to D^{0} D^{0} K^{+} I ¨ ^{-}$

Observation of a new $I^_{b}^{0}$ state

Isospin amplitudes in $I^_{b}^{0} \to J / I ¨ I^ (I^£^{0})$ and $I^_{b}^{0} \to J / I ¨ I^^{0} (I^)$ decays

Searches for 25 rare and forbidden decays of $D^{+}$ and $D_{s}^{+}$ mesons

Measurement of the CKM angle $I^^{3}$ in $B^{\pm} \to D K^{\pm}$ and $B^{\pm} \to D I ¨ ^{\pm}$ decays with $D \to K_{S}^{0} h^{+} h^{-}$

Measurement of $∣ V_{c b} ∣$ with $B_{s}^{0} \to D_{s}^{(*) -} I^¼^{+} I^½_{I^} ¼$ decays

Search for the rare decay $B^{0} \to J / I ¨ I ¨ $

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

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

Search for the doubly heavy baryons $I^c ◯_{bc}^{0}$ and $I^_{bc}^{0}$ decaying to $I^_{c}^{+} I ¨ ^{-}$ and $I^_{c}^{+} I ¨ ^{-}$

Measurement of branching fraction ratios for $B^{+} \to D^{+} D^{-} K^{+}$ , $B^{+} \to D^{-} D^{+} K^{+}$ , and $B^{0} \to D^{*-} D^{0} K^{+}$ decays