Federico Alessio

activity

20092026

most citedObservation of a narrow pentaquark state,

P_{c} (4312)^{+}

, and of two-peak structure of the

P_{c} (4450)^{+}

738 citations · 14.2k across the 318 of their papers we have counts for

collaborators

Showing 2012Show all

18 papers · 1 filter

hep-ex2012★ 11 cited

First observation of the decays $B ˉ_{(s)}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ_{s}^{0} \to D_{s 1} (2536)^{+} π^{-}$

LHCb collaboration, R. Aaij, C. Abellan Beteta +621

The first observation of the decays $B ˉ_{s}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ are reported using an integrated luminosity of 1.0 fb $^{- 1}$ recorded by the…

hep-ex2012★ 53 cited

Measurement of J/psi production in pp collisions at sqrt(s)=2.76 TeV

LHCb collaboration, R. Aaij, C. Abellan Beteta +624

The production of J/psi mesons is studied with the LHCb detector using data from pp collisions at sqrt(s)=2.76 TeV corresponding to an integrated luminosity of 71 nb^-1. The differ…

hep-ex2012★ 26 cited

Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays

LHCb collaboration, R. Aaij, C. Abellan Beteta +622

This Letter reports a measurement of the CP violation observables S_J/ψKS0 and C_J/ψKS0 in the decay channel B0 -> J/ψ KS0 performed with 1.0/fb of pp collisions at sqrt(s) = 7 TeV…

hep-ex2012★ 17 cited

A study of the $Z$ production cross-section in $pp$ collisions at $s = 7$ TeV using tau final states

The LHCb collaboration, R. Aaij, C. Abellan Beteta +621

A measurement of the inclusive $Z \to τ τ$ cross-section in $pp$ collisions at $s = 7$ TeV is presented based on a dataset of 1.0 fb $^{- 1}$ collected by the LHCb detector. Ca…

hep-ex2012★ 59 cited

Measurement of the ratio of branching fractions BR(B0 -> K0 gamma)/BR(Bs0 -> phi gamma) and the direct CP asymmetry in B0 -> K0 gamma

LHCb collaboration, R. Aaij, C. Abellan Beteta +621

The ratio of branching fractions of the radiative B decays B0 -> K*0 gamma and Bs0 phi gamma has been measured using an integrated luminosity of 1.0 fb-1 of pp collision data colle…

hep-ex2012★ 42 cited

A model-independent Dalitz plot analysis of $B^{\pm} \to D K^{\pm}$ with $D \to K_{S}^{0} h^{+} h^{-}$ ( $h = π, K$ ) decays and constraints on the CKM angle $γ$

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

A binned Dalitz plot analysis of $B^{\pm} \to D K^{\pm}$ decays, with $D \to K_{S}^{0} π^{+} π^{-}$ and $D \to K_{S}^{0} K^{+} K^{-}$ , is performed to measure the CP-violating observables $…

hep-ex2012★ 46 cited

First observation of the decay $B^{+} \to π^{+} μ^{+} μ^{-}$

LHCb Collaboration, R. Aaij, C. Abellan Beteta +621

A discovery of the rare decay $B^{+} \to π^{+} μ^{+} μ^{-}$ is presented. This decay is observed for the first time, with 5.2 $σ$ significance. The observation is made usin…

hep-ex2012★ 22 cited

Search for the rare decay KS -> mu+ mu-

LHCb collaboration, R. Aaij, C. Abellan Beteta +616

A search for the decay KS -> mu+ mu- is performed, based on a data sample of 1.0 fb^-1 of pp collisions at \sqrt{s}=7 TeV collected by the LHCb experiment at the Large Hadron Colli…

hep-ex2012★ 28 cited

Measurement of the fraction of \Y1S originating from \chib1P decays in $pp$ collisions at $\sqrt{s} = 7\tev$

LHCb collaboration, R. Aaij, C. Abellan Beteta +616

The production of \chib1P mesons in $pp$ collisions at a centre-of-mass energy of $7\tev$ is studied using $32\invpb$ of data collected with the \lhcb detector. The $\chib1P$ meson…

hep-ex2012★ 26 cited

Measurement of the $B_{s}^{0} \to J / ψ K^{* 0}$ branching fraction and angular amplitudes

LHCb collaboration, R. Aaij, C. Abellan Beteta +616

A search for the decay $B_{s}^{0} \to J / ψ K^{* 0}$ with $K^{* 0} \to K^{-} π^{+}$ is performed with 0.37 fb $^{- 1}$ of $pp$ collisions at $s$ = 7 TeV collected by the LHCb…

hep-ex2012★ 48 cited

Measurement of the Ds+ - Ds- production asymmetry in 7 TeV pp collisions

LHCb collaboration, R. Aaij, C. Abellan Beteta +605

Heavy quark production in 7 TeV centre-of-mass energy pp collisions at the LHC is not necessarily flavour symmetric. The production asymmetry, A_P, between Ds+ and Ds- mesons is st…

hep-ex2012★ 78 cited

Measurement of $b$ -hadron branching fractions for two-body decays into charmless charged hadrons

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

Based on data corresponding to an integrated luminosity of 0.37 fb^-1 collected by the LHCb experiment in 2011, the following ratios of branching fractions are measured: B(B0 -> pi…

hep-ex2012

Measurement of psi(2S) meson production in pp collisions at sqrt(s)=7 TeV

LHCb collaboration, R. Aaij, C. Abellán Beteta +577

The differential cross-section for the inclusive production of psi(2S) mesons in pp collisions at sqrt(s)=7 TeV has been measured with the LHCb detector. The data sample correspond…

hep-ex2012★ 47 cited

Observation of CP violation in B+ to DK+ decays

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

An analysis of B+ to DK+ and B+ to Dpi+ decays is presented where the D meson is reconstructed in the two-body final states: K+pi-, K+K-, pi+pi- and pi+K-. Using 1.0 fb-1 of LHCb d…

hep-ex2012★ 83 cited

Search for the X(4140) state in B+ to J/psi phi K+ decays

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

A search for the X(4140) state in B+ to J/psi phi K+ decays is performed with 0.37 fb-1 of pp collisions at sqrt(s)=7 TeV collected by the LHCb experiment. No evidence for this sta…

hep-ex2012★ 63 cited

First evidence of direct CP violation in charmless two-body decays of Bs mesons

LHCb collaboration, R. Aaij, C. Abellan Beteta +591

Using a data sample corresponding to an integrated luminosity of 0.35 $fb^{- 1}$ collected by LHCb in 2011, we report the first evidence of CP violation in the decays of $B…

hep-ex2012★ 91 cited

Determination of the sign of the decay width difference in the B_s system

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

The interference between the K+K- S-wave and P-wave amplitudes in B_s -> J/psi K+K- decays with the K+K- pairs in the region around the phi(1020) resonance is used to determine the…

hep-ex2012★ 72 cited

Searches for Majorana neutrinos in B- decays

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

Searches for heavy Majorana neutrinos in B- decays in final states containing hadrons plus a μ- μ- pair have been performed using 0.41/fb of data collected with the LHCb detector i…

First observation of the decays Bˉ(s)0​→Ds+​K−π+π− and Bˉs0​→Ds1​(2536)+π−

Measurement of J/psi production in pp collisions at sqrt(s)=2.76 TeV

Measurement of the time-dependent CP asymmetry in B0 -> J/ψ KS0 decays

A study of the Z production cross-section in pp collisions at s​=7 TeV using tau final states

Measurement of the ratio of branching fractions BR(B0 -> K*0 gamma)/BR(Bs0 -> phi gamma) and the direct CP asymmetry in B0 -> K*0 gamma

A model-independent Dalitz plot analysis of B±→DK± with D→KS0​h+h− (h=π,K) decays and constraints on the CKM angle γ

First observation of the decay B+→π+μ+μ−

Search for the rare decay KS -> mu+ mu-

Measurement of the fraction of \Y1S originating from \chib1P decays in pp collisions at $\sqrt{s} = 7\tev$

Measurement of the Bs0​→J/ψK∗0 branching fraction and angular amplitudes

Measurement of the Ds+ - Ds- production asymmetry in 7 TeV pp collisions

Measurement of b-hadron branching fractions for two-body decays into charmless charged hadrons

Measurement of psi(2S) meson production in pp collisions at sqrt(s)=7 TeV

Observation of CP violation in B+ to DK+ decays

Search for the X(4140) state in B+ to J/psi phi K+ decays

First evidence of direct CP violation in charmless two-body decays of Bs mesons

Determination of the sign of the decay width difference in the B_s system

Searches for Majorana neutrinos in B- decays

First observation of the decays $B ˉ_{(s)}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ_{s}^{0} \to D_{s 1} (2536)^{+} π^{-}$

A study of the $Z$ production cross-section in $pp$ collisions at $s = 7$ TeV using tau final states

Measurement of the ratio of branching fractions BR(B0 -> K0 gamma)/BR(Bs0 -> phi gamma) and the direct CP asymmetry in B0 -> K0 gamma

A model-independent Dalitz plot analysis of $B^{\pm} \to D K^{\pm}$ with $D \to K_{S}^{0} h^{+} h^{-}$ ( $h = π, K$ ) decays and constraints on the CKM angle $γ$

First observation of the decay $B^{+} \to π^{+} μ^{+} μ^{-}$

Measurement of the fraction of \Y1S originating from \chib1P decays in $pp$ collisions at $\sqrt{s} = 7\tev$

Measurement of the $B_{s}^{0} \to J / ψ K^{* 0}$ branching fraction and angular amplitudes

Measurement of $b$ -hadron branching fractions for two-body decays into charmless charged hadrons