D. A. Roa Romero

activity

20112014

most citedObservation of the resonant character of the

Z (4430)^{-}

state

398 citations · 2.8k across the 43 of their papers we have counts for

collaborators

Showing 2012Show all

9 papers · 1 filter

hep-ex2012★ 17 cited

First evidence for the annihilation decay mode $B^{+} \to D_{s}^{+} ϕ$

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

Evidence for the hadronic annihilation decay mode $B^{+} \to D_{s}^{+} ϕ$ is found with greater than $3 σ$ significance. The branching fraction and \CP asymmetry are measured to be \ma…

hep-ex2012★ 105 cited

Differential branching fraction and angular analysis of the $B^{+} \to K^{+} μ^{+} μ^{-}$ decay

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

The angular distribution and differential branching fraction of the decay $B^{+} \to K^{+} μ^{+} μ^{-}$ are studied with a dataset corresponding to $1.0 fb^{- 1}$ of…

hep-ex2012★ 34 cited

Measurement of relative branching fractions of B decays to $ψ (2 S)$ and $J / ψ$ mesons

LHCb Collaboration

The relative rates of B-meson decays into $J / ψ$ and $ψ (2 S)$ mesons are measured for the three decay modes in pp collisions recorded with the LHCb detector. The ratios of branching…

hep-ex2012★ 114 cited

Observation of excited Lambda_b0 baryons

LHCb collaboration, R. Aaij, C. Abellan Beteta +615

Using pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Lambda_b0pi+pi- spectrum with masses 5…

hep-ex2012★ 88 cited

Measurement of the isospin asymmetry in $B \to K^{(*)} μ^{+} μ^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellan Beteta +615

The isospin asymmetries of $B \to K^{(*)} μ^{+} μ^{-}$ decays and the partial branching fractions of $B^{0} \to K^{0} μ^{+} μ^{-}$ and $B^{+} \to K^{*+} μ^{+} μ^{-}$ are measured as a function of the di-m…

hep-ex2012★ 93 cited

Analysis of the resonant components in Bs->J/ψπ+π-

The LHCb collaboration, R. Aaij, C. Abellan Beteta +592

The decay Bs->J/ψπ+π- can be exploited to study CP violation. A detailed understanding of its structure is imperative in order to optimize its usefulness. An analysis of this three…

hep-ex2012★ 83 cited

First observation of the decay Bc+ to J/psi pi+pi-pi+

LHCb collaboration, R. Aaij, C. Abellan Beteta +592

The decay Bc+ --> J/psi pi+pi-pi+ is observed for the first time, using 0.8 fb-1 of pp collisions at sqrt{s}=7 TeV collected by the LHCb experiment. The ratio of branching fraction…

hep-ex2012★ 101 cited

Measurement of Upsilon production in pp collisions at \sqrt{s} = 7 TeV

The LHCb Collaboration, R. Aaij, C. Abellan Beteta +594

The production of Upsilon(1S), Upsilon(2S) and Upsilon(3S) mesons in proton-proton collisions at the centre-of-mass energy of sqrt(s)=7 TeV is studied with the LHCb detector. The a…

hep-ex2012★ 69 cited

Measurement of the cross-section ratio $σ (χ_{c 2}) / σ (χ_{c 1})$ for prompt $χ_{c}$ production at $s = 7$ TeV

LHCb Collaboration, R. Aaij, C. Abellan Beteta +589

The prompt production of the charmonium $χ_{c 1}$ and $χ_{c 2}$ mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of $\sqrt{…

First evidence for the annihilation decay mode B+→Ds+​ϕ

Differential branching fraction and angular analysis of the B+→K+μ+μ− decay

Measurement of relative branching fractions of B decays to ψ(2S) and J/ψ mesons