D. Murray

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…

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…

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…

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…

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…

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 $C P$ -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…

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…

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…

Study of $Z$ bosons produced in association with charm in the forward region

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

Events containing a $Z$ boson and a charm jet are studied for the first time in the forward region of proton-proton collisions. The data sample used corresponds to an integrated lu…

Searches for rare $B_{s}^{0}$ and $B^{0}$ decays into four muons

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +997

Searches for rare $B_{s}^{0}$ and $B^{0}$ decays into four muons are performed using proton-proton collision data recorded by the LHCb experiment, corresponding to an integrated luminosi…

hep-ex2018

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}/…

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…

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…

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…

hep-ex2018

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…

astro-ph.SR2010

Discovery of a T dwarf + white dwarf binary system

A. C. Day-Jones, D. J. Pinfield, M. T. Ruiz +11

We present the discovery of the first T dwarf + white dwarf binary system LSPM 1459+0857AB, confirmed through common proper motion and spectroscopy. The white dwarf is a high prope…

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-ex2023

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…

Analysis of neutral $B$ -meson decays into two muons

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

Branching fraction and effective lifetime measurements of the rare decay $B_{s}^{0} \to I^¼^{+} I^¼^{-}$ and searches for the decays $B^{0} \to I^¼^{+} I^¼^{-}$ and $B_{s}^{0} \to I^¼^{+} I^¼^{-} I^^{3}$ are reported using…

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…

Determination of quantum numbers for several excited charmed mesons observed in $B^{-} \to D^{*+} I ¨ ^{-} I ¨ ^{-}$ decays

LHCb collaboration, R. Aaij, C. AbellÃ¡n Beteta +907

A four-body amplitude analysis of the $B^{-} \to D^{*+} I ¨ ^{-} I ¨ ^{-}$ decay is performed, where fractions and relative phases of the various resonances contributing to the decay are mea…

hep-ex2023

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

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

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

hep-ex2023

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

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

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

physics.ins-det2022

The Upgrade I of LHCb VELO -- towards an intelligent monitoring platform

P. Kopciewicz, T. Szumlak, M. Majewski +63

The Large Hadron Collider beauty (LHCb) detector is designed to detect decays of b- and c- hadrons for the study of CP violation and rare decays. At the end of the LHC Run 2, many…

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…

Measurement of $I^_{cc}^{++}$ production in $pp$ collisions at $s = 13$ TeV

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

The production of $I^_{cc}^{++}$ baryons in proton-proton collisions at a centre-of-mass energy of $s = 13$ TeV is measured in the transverse-momentum range $4<p_\mathr…