Modification of Υ production in pO and OO collisions at LHCb - The significant suppression in OO data, compared to the small effect in pO data, shows the emergence of additional suppression mechanisms in the relatively small OO collision system. arxiv.org/abs/2608.00182

Search for the decays B(c)⁺→μ⁺νγ - No evidence for an excess of events over background is observed for either signal decay. This constitutes the first search for these decays at a hadron collider and the first experimental investigation of the Bc⁺→μ⁺νγ decay to date. arxiv.org/abs/2607.12825

These are hadrons number 84 and 85 observed at the LHC, of which 75 were observed by LHCb. The full list is maintained by @koppenburg.ch, see www.koppenburg.ch/particles.html .

Observation of new excited Σc⁰ states in the B⁻→Λc⁺p̅π⁻ decay - the known Σc(2455)⁰, Σc(2520)⁰, Σc(2800)⁰ baryons are observed, along with two new states: Σc(2900)⁰ and Σc(3200)⁰. arxiv.org/abs/2607.10595

Differential measurement of the branching fraction and CP asymmetry of the decay B⁺→π⁺μ⁺μ⁻ - The measured branching fractions are compatible with the predictions of the Standard Model, with consistency varying between 1.4σ and 3.8σ depending on the model assumptions. arxiv.org/abs/2606.23646

Measurement of the ratio of branching fractions B(Bc⁺→J/ψτ⁺ν)/B(Bc⁺→J/ψμ⁺ν) - The measured value is found to be R(J/ψ)=0.51±0.12(stat)±0.08(syst), which is within 1.8 standard deviations of the predictions from the Standard Model assuming lepton flavor universality. arxiv.org/pdf/2606.10018

Associated Z + J/ψ production as a probe of multiparton interactions in the forward region - The measured cross-section is 5.5±1.5 pb, significantly exceeding the single-parton scattering expectation of 0.10±0.08 pb, indicating that multiparton interactions dominate. arxiv.org/abs/2606.05786

Study of nuclear effects on charm production in light-ion collisions - The onset of nuclear effects in light-ion collisions is studied by measuring the ratio of D meson production between NeNe and OO collisions at a center-of-mass energy per nucleon pair of 5.36TeV. arxiv.org/abs/2605.27273

Evidence for the decay Bₛ⁰→ϕη' - The branching ratio relative to the Bₛ⁰→ϕϕ decay is determined to be R=(3.56±0.79±0.18±0.06)×10⁻² arxiv.org/abs/2605.07586

CP violation analysis of local and nonlocal amplitudes in the B⁰→K*⁰μ⁺μ⁻ decay - The precision of the CP-violation observables is improved by an order of magnitude relative to previous measurement. No significant CP violation is observed. arxiv.org/abs/2605.07582

Observation of the chΛb⁰→Λpp̅ - The signal decay is observed with a significance of 5.1 standard deviations. arxiv.org/abs/2605.04348

Measurement of γ using B⁺→ DK⁺ and B⁺→ Dπ⁺ decays with D→Ks⁰π⁺π⁻ and D→Ks⁰K⁺K⁻ - A measurement of the CKM angle γ is performed with a data sample collected during 2024 by the upgraded LHCb experiment. The CKM angle γ is determined to be γ=(68.1±6.7)∘. arxiv.org/abs/2605.03501

First evidence of the decay B⁺→K⁺e⁺e⁻ - A signal excess with a significance of 3.2σ is observed and the branching fraction is measured to be BR(B⁺→K⁺e⁺e⁻)=(2.4+0.9−0.8+0.4−0.2)×10⁻⁸, where the first set of uncertainties is statistical and the second is systematic arxiv.org/abs/2604.26784

Angular analysis of the B⁺→π⁺μ⁺μ⁻ decay - The Standard Model predictions lie within the obtained 68% confidence level interval in the high-mass and within the 99% interval in the low-mass region. arxiv.org/abs/2604.21987

Observation of a new excited charm-strange meson Dₛ₁(2933)⁺ in B⁰→D⁺D⁻K⁺π⁻ decays - Its Breit-Wigner mass and width are measured to be 2933 MeV and 72 MeV, respectively, and its spin-parity 1⁺. This new meson is a candidate for a Dₛ(2P₁)⁺ state. arxiv.org/abs/2604.21257

Study of the B⁰→Λc⁺Λ̅c⁻Ks⁰ decay - Evidence is found for contributions from two resonant states, Ξc(2923)⁺ and Ξc(2939)⁺, in the Λc⁺Ks⁰ system. arxiv.org/abs/2604.15040

Measurement of the W-boson production cross-sections in pp collisions at √s = 13 TeV in the forward region - The cross-section is measured for muons with transverse momentum between 25 and 55 GeV and pseudorapidity between 2.0 and 4.5. arxiv.org/abs/2604.12706

Precision measurement of the muon charge asymmetry from W-boson decays in pp collisions at √s = 13 TeV in the forward region - This result represents the most precise determination of the muon charge asymmetry in the forward region to date. arxiv.org/abs/2604.12593

Measurement of inclusive production of charmonium states in b-hadron decays via their decay into ϕϕ - The inclusive production of the ηc(1S), ηc(2S) and χc charmonium states in b-hadron decays is studied with LHCb Run~2 data using charmonia decays to ϕϕ pairs. arxiv.org/abs/2604.11123

Test of lepton flavour universality with B⁰→ K*⁰ℓ⁺ℓ⁻ decays at large dilepton invariant mass - The ratio of branching fractions between the muon and electron channels is measured to be 1.08+0.14−0.12(stat) ±0.07(syst) for a dilepton-invariant-mass squared above 14.0 GeV² arxiv.org/abs/2604.08631

More details are in arxiv.org/abs/2604.05701

Precise measurement of the CKM angle γ with a novel approach - A measurement of the CKM angle γ is performed by applying a novel, unbinned, model-independent approach to datasets of collected by the BESIII and LHCb experiments and yields γ=(71.3±5.0)∘. arxiv.org/abs/2604.05701

Search for the lepton-flavour violating decays B⁺→π⁺μ⁺e⁻ and B⁺→π⁺μ⁻e⁺ - No signal is observed and an upper limit on the branching fraction is set at <1.8×10⁻⁹ at the 90% confidence level, two orders of magnitude more restrictive than the current world average. arxiv.org/abs/2604.08396

Search for the decays Bₛ⁰→J/ψγ at LHCb - Assuming no contribution from B⁰→J/ψγ decay, an upper limit is set on the branching fraction B(Bₛ⁰→J/ψγ)<2.9× 10⁻⁶. If no contribution from Bₛ⁰→J/ψγ decay is assumed, the limit is B(B⁰→J/ψγ)<2.5×10⁻⁶ at the 90% confidence level. arxiv.org/pdf/2604.02933

Observation of the doubly charmed baryon Ξcc⁺ with the LHCb Run 3 detector - The Ξ+cc mass is measured to be 3619.97±0.83±0.26+1.90−1.30MeV, where the third uncertainty is due to the unknown lifetime, which is assumed to lie in the range 15-160 fs. arxiv.org/abs/2603.28456

Measurement of CP asymmetries in B̅⁰→Dₛ⁻D⁺ and B̅⁰ₛ→Dₛ⁺D⁻ decays - The measurements are found to be ACP(B̅⁰→Dₛ⁻D⁺) = 0.0009±0.0053±0.0040, ACP(B̅⁰ₛ→Dₛ⁺D⁻ ) = 0.103±0.053±0.010, This is the first measurement of this asymmetry in B̅⁰ₛ decays. arxiv.org/abs/2603.28132

B-jet fragmentation with B⁺→ J/ψK⁺ decays in √s=13 TeV pp collisions at LHCb arxiv.org/abs/2603.23663 - The results suggest a growing contribution of gluon fragmentation to B⁺ mesons as the jet transverse momentum increases.

Measurement of the local and nonlocal amplitudes in B⁺→ K⁺μ⁺μ⁻ decays arxiv.org/abs/2603.12477 - The compatibility of the Wilson coefficient combinations C9+C′9 and C10+C′10 with the Standard Model prediction is found to vary between 1.6σ and 4σ, depending on the choice of local form factors.

First measurement of time-dependent CP violation in the decay flavor-changing neutral-current decay B⁰→Kₛ⁰μ⁺μ⁻ arxiv.org/abs/2603.13223 - The CP violation parameters are determined to be C=−0.13±0.32±0.04 and S=+0.82±0.29±0.05, are consistent with the Standard Model prediction.

First measurement of the decay-time-integrated CP asymmetry in Bₛ⁰→Dₛ⁻π⁺ decays arxiv.org/abs/2603.10860 - The combined result, (−1.4±5.9(stat)±1.1(syst))×10⁻³, is consistent with the Standard Model expectation and provides a direct constraint on new physics in tree-level b-hadron decays.