l. Soares Lavra

Amplitude models are constructed to describe the resonance structure of $D^{0} \to K^{-} π^{+} π^{+} π^{-}$ and $D^{0} \to K^{+} π^{-} π^{-} π^{+}$ decays using $pp$ collision data co…

hep-ex2017★ 35 cited

Evidence for the rare decay $Σ^{+} \to p μ^{+} μ^{-}$

LHCb collaboration, R. Aaij, B. Adeva +791

A search for the rare decay $Σ^{+} \to p μ^{+} μ^{-}$ is performed using $pp$ collision data recorded by the LHCb experiment at centre-of-mass energies $s = 7$ and $8$ TeV, corres…

hep-ex2017★ 15 cited

Search for $B_{c}^{+}$ decays to two charm mesons

LHCb collaboration, R. Aaij, B. Adeva +791

A search for decays of $B_{c}^{+}$ mesons to two charm mesons is performed for the first time using data corresponding to an integrated luminosity of 3.0 fb $^{- 1}$ , collected by the LH…

hep-ex2017★ 24 cited

Search for excited $B_{c}^{+}$ states

LHCb collaboration, R. Aaij, B. Adeva +792

A search is performed in the invariant mass spectrum of the $B_{c}^{+} π^{+} π^{-}$ system for the excited $B_{c}^{+}$ states $B_{c} (2^{1} S_{0})^{+}$ and $B_{c} (2^{3} S_{1})^{+}$ using a data sam…

hep-ex2017★ 33 cited

Updated determination of $D^{0}$ - $D^{0}$ mixing and CP violation parameters with $D^{0} \to K^{+} π^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +792

We report measurements of charm-mixing parameters based on the decay-time-dependent ratio of $D^{0} \to K^{+} π^{-}$ to $D^{0} \to K^{-} π^{+}$ rates. The analysis uses a data sample of proton-pro…

hep-ex2017★ 280 cited

Measurement of the ratio of branching fractions $B (B_{c}^{+} \to J / ψ τ^{+} ν_{τ})$ / $B (B_{c}^{+} \to J / ψ μ^{+} ν_{μ})$

LHCb collaboration, R. Aaij, B. Adeva +797

A measurement is reported of the ratio of branching fractions $R (J / ψ) = B (B_{c}^{+} \to J / ψ τ^{+} ν_{τ}) / B (B_{c}^{+} \to J / ψ μ^{+} ν_{μ})$ , where the $τ^{+}$ lepton is id…

hep-ex2017★ 18 cited

Measurement of branching fractions of charmless four-body $Λ_{b}^{0}$ and $Ξ_{b}^{0}$ decays

LHCb collaboration, R. Aaij, B. Adeva +794

A search for charmless four-body decays of $Λ_{b}^{0}$ and $Ξ_{b}^{0}$ baryons with a proton and three charged mesons (either kaons or pions) in the final state is performed. The d…

hep-ex2017★ 20 cited

Measurements of the branching fractions of $Λ_{c}^{+} \to p π^{-} π^{+}$ , $Λ_{c}^{+} \to p K^{-} K^{+}$ , and $Λ_{c}^{+} \to p π^{-} K^{+}$

LHCb collaboration, R. Aaij, B. Adeva +804

The ratios of the branching fractions of the decays $Λ_{c}^{+} \to p π^{-} π^{+}$ , $Λ_{c}^{+} \to p K^{-} K^{+}$ , and $Λ_{c}^{+} \to p π^{-} K^{+}$ with res…

hep-ex2017★ 42 cited

Search for the lepton-flavour violating decays $B_{(s)}^{0} \to e^{\pm} μ^{\mp}$

LHCb collaboration, R. Aaij, B. Adeva +799

A search for the lepton-flavour violating decays $B_{s}^{0} \to e^{\pm} μ^{\mp}$ and $B^{0} \to e^{\pm} μ^{\mp}$ is performed based on a sample of proton-proton collision data co…

hep-ex2017★ 206 cited

Search for dark photons produced in 13 TeV $pp$ collisions

LHCb collaboration, R. Aaij, B. Adeva +796

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, using $A^{\prime}\…

hep-ex2017★ 48 cited

Measurement of the shape of the $Λ_{b}^{0} \to Λ_{c}^{+} μ^{-} ν$ differential decay rate

LHCb collaboration, R. Aaij, B. Adeva +801

A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay $Λ_{b}^{0} \to Λ_{c}^{+} μ^{-} ν$ is reported, using data corresponding to…

hep-ex2017★ 318 cited

Measurement of the ratio of the $B^{0} \to D^{-} τ^{+} ν_{τ}$ and $B^{0} \to D^{-} μ^{+} ν_{μ}$ branching fractions using three-prong $τ$ -lepton decays

LHCb collaboration, R. Aaij, B. Adeva +806

The ratio of branching fractions $R (D^{*-}) \equiv B (B^{0} \to D^{*-} τ^{+} ν_{τ}) / B (B^{0} \to D^{*-} μ^{+} ν_{μ})$ is measured using a data sample of proton-proton colli…

hep-ex2017★ 59 cited

Updated search for long-lived particles decaying to jet pairs

LHCb collaboration, R. Aaij, B. Adeva +766

A search is presented for long-lived particles with a mass between 25 and 50 GeV/ $c^{2}$ and a lifetime between 2 and 500 ps, using proton-proton collision data corresponding to an i…

hep-ex2017★ 24 cited

Measurement of $B_{s}^{0}$ and $D_{s}^{-}$ meson lifetimes

LHCb collaboration, R. Aaij, B. Adeva +774

We report on a measurement of the flavor-specific $B_{s}^{0}$ lifetime and of the $D_{s}^{-}$ lifetime using proton-proton collisions at center-of-mass energies of 7 and 8 TeV, col…

hep-ex2017★ 14 cited

Observation of charmless baryonic decays $B_{(s)}^{0} \to p p h^{+} h^{' -}$

LHCb collaboration, R. Aaij, B. Adeva +770

Decays of $B^{0}$ and $B_{s}^{0}$ mesons to the charmless baryonic final states $p p h^{+} h^{' -}$ , where $h$ and $h^{'}$ each denote a kaon or a pion, are searched fo…

hep-ex2017★ 4 cited

Observation of the $B^{+} \to D^{*-} K^{+} π^{+}$ decay

LHCb collaboration, R. Aaij, B. Adeva +771

The $B^{+} \to D^{*-} K^{+} π^{+}$ decay potentially provides an excellent way to investigate charm meson spectroscopy. The decay is searched for in a sample of proton-proton collision dat…

hep-ex2017★ 26 cited

Observation of the decay $Λ_{b}^{0} \to p K^{-} μ^{+} μ^{-}$ and a search for $C P$ violation

LHCb collaboration, R. Aaij, B. Adeva +763

A search for $C P$ violation in the decay $Λ_{b}^{0} \to p K^{-} μ^{+} μ^{-}$ is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and…

hep-ex2017★ 19 cited

Measurement of the $B^{\pm}$ production asymmetry and the $C P$ asymmetry in $B^{\pm} \to J / ψ K^{\pm}$ decays

LHCb collaboration, R. Aaij, B. Adeva +764

The $B^{\pm}$ meson production asymmetry in $pp$ collisions is measured using $B^{+} \to D ˉ^{0} π^{+}$ decays. The data were recorded by the LHCb experiment during Run 1 of the LHC…

Amplitude analysis of the decay B0→KS0​π+π− and first observation of the CP asymmetry in B0→K∗(892)−π+

Studies of the resonance structure in D0→K∓π±π±π∓ decays

Evidence for the rare decay Σ+→pμ+μ−

Search for Bc+​ decays to two charm mesons

Search for excited Bc+​ states

Updated determination of D0-D0 mixing and CP violation parameters with D0→K+π− decays

Measurement of the ratio of branching fractions B(Bc+​→J/ψτ+ντ​)/B(Bc+​→J/ψμ+νμ​)

Measurement of branching fractions of charmless four-body Λb0​ and Ξb0​ decays

Measurements of the branching fractions of Λc+​→pπ−π+, Λc+​→pK−K+, and Λc+​→pπ−K+

Search for the lepton-flavour violating decays B(s)0​→e±μ∓

Search for dark photons produced in 13 TeV pp collisions

Measurement of the shape of the Λb0​→Λc+​μ−ν differential decay rate

Measurement of the ratio of the B0→D∗−τ+ντ​ and B0→D∗−μ+νμ​ branching fractions using three-prong τ-lepton decays