Browsing Recerca by Subject "539"
Now showing items 181-200 of 236
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Precision measurement of the B0 s –B 0 s oscillation frequency with the decay B0 s → D − s π +
(New Journal of Physics, 2013, Vol. 15, 2013-05)A key ingredient to searches for physics beyond the Standard Model in B0 s mixing phenomena is the measurement of the B0 s – B 0 s oscillation frequency, which is equivalent to the mass difference 1ms ... -
Precision Measurement of the Mass and Lifetime of the Ξ0b Baryon
(Physical Review Letters , 2014, Vol. 113, No.3 (Juliol), 2014-07-15)Using a proton-proton collision data sample corresponding to an integrated luminosity of 3 fb−1 collected by LHCb at center-of-mass energies of 7 and 8 TeV, about 3800 Ξ0b→Ξ+cπ−, Ξ+c→pK−π+ signal decays ... -
Precision measurement of the ratio of the Λb0 to B¯0 lifetimes
(Physics Letters B , 2014, Vol. 734, (Juny), 2014-06-27)The LHCb measurement of the lifetime ratio of the Λ0b to the B⎯⎯⎯0 meson is updated using data corresponding to an integrated luminosity of 3.0 fb−1 collected using 7 and 8 TeV centre-of-mass energy pp ... -
Precision measurement of the Ξ++cc mass
(Journal of High Energy Physics, 2020, 49, 2020-02)A measurement of the Ξ++cc mass is performed using data collected by the LHCb experiment between 2016 and 2018 in pp collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated ... -
Preparation and applications of organo-silica hybrid mesoporous silica nanoparticles for the co-delivery of drugs and nucleic acids
(Nanomaterials. Vol.10, n.12 (2020), 2466, 2020-12)Combination therapies rely on the administration of more than one drug, with independent mechanisms of action, aiming to enhance the efficiency of the treatment. For an optimal performance, the ... -
Production of J/ψ and Υ mesons in pp collisions at s√=8 TeV
(Journal of High Energy Physics, 2013, Vol. 2013, No.6 (Juny), 2013-06-14)The production of J/ψ and Υ mesons in pp collisions at s√=8 TeV is studied with the LHCb detector. The J/ψ and Υ mesons are reconstructed in the μ + μ − decay mode and the signal yields are determined ... -
Prompt charm production inppcollisions at √s=7 TeV
(Nuclear Physics B, 2013, Vol. 871, No. 1, 2013-06)Charm production at the LHC in pp collisions at √s=7 TeV is studied with the LHCb detector. The decays D0→K−π+,D+→K−π+π+,D∗+→D0(K−π+)π+,D+s→φ(K−K+)π+,Λ+c→pK−π+, and their charge conjugates are analysed ... -
Quantum numbers of the X(3872) state and orbital angular momentum in its ρ0J/ψ decay
(Physical Review D, 2015, Vol.92, No.1 (Juliol), 2015-07-30)Angular correlations in B+→X(3872)K+ decays, with X(3872)→ρ0J/ψ, ρ0→π+π− and J/ψ→μ+μ−, are used to measure orbital angular momentum contributions and to determine the JPC value of the X(3872) meson. The ... -
Road map for selected key measurements from LHCb
(2010-02-16)Six of the key physics measurements that will be made by the LHCb experiment, concerning CP asymmetries and rare B decays, are discussed in detail. The 'road map' towards the precision measurements is ... -
Search for A′→μ+μ− Decays
(Physical Review Letters, 2020, Vol.124, 041801, 2020-01)Searches are performed for both promptlike 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′→μ+μ− decays using a data ... -
Search for CP violation in D + → ϕπ + and D+s→K0Sπ+ decays
(Journal of High Energy Physics, 2013, Vol. 2013, No.6 (Juny), 2013-06-28)A search for CP violation in D + → ϕπ + decays is performed using data collected in 2011 by the LHCb experiment corresponding to an integrated luminosity of 1.0 fb−1 at a centre of mass energy of 7 TeV. ... -
Search for CP violation in D+(s)→h+π0 and D+(s)→h+η decays
(Journal of High Energy Physics, 2021, Vol.6, No. 19, 2021-06)Searches for CP violation in the two-body decays D+(s)→h+π0 and D+(s)→h+η (where h+ denotes a π+ or K+ meson) are performed using pp collision data collected by the LHCb experiment corresponding to ... -
Search for CP violation in the decay D+→π−π+π+
(Physics Letters B , 2014, Vol. 728, (Gener), 2014-01-20)A search for CP violation in the phase space of the decay $D^+\to\pi^-\pi^+\pi^+$ is reported using $pp$ collision data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb ... -
Search for CP violation using T-odd correlations in D 0 → K + K −π+π− decays
(Journal of High Energy Physics, 2014, Vol. 2014, No.10 (Octubre), 2014-10-01)A search for CP violation using T-odd correlations is performed using the four-body D 0 → K + K −π+π− decay, selected from semileptonic B decays. The data sample corresponds to integrated luminosities ... -
Search for long-lived particles decaying to e ± μ∓ ν
(European Physical Journal C, 2021, Vol. 81, No. 261, 2021-03)Long-lived particles decaying to e±μ∓ν, with masses between 7 and 50GeV/c2 and lifetimes between 2 and 50ps, are searched for by looking at displaced vertices containing electrons and muons of opposite ... -
Search for long-lived particles decaying to jet pairs
(The European Physical Journal C, 2015, Vol. 75, no. 4 (Abril), 2015-04-17)A search is presented for long-lived particles with a mass between 25 and 50 GeV/c2 and a lifetime between 1 and 200ps in a sample of proton–proton collisions at a centre-of-mass energy of s√=7 TeV, ... -
Search for Rare B 0 ( s ) → μ + μ − μ + μ − Decays
(Physical Review Letters, 2013, Vol. 110, No. 21, 2013-05)A search for the decays B 0 s → μ + μ − μ + μ − and B 0 → μ + μ − μ + μ − is performed using data, corresponding to an integrated luminosity of 1.0 fb − 1 , collected with the LHCb detector in ... -
Search for the decay B0s→D¯¯¯¯0f0(980)
(Journal of High Energy Physics, 2015, Vol. 2015, No.8 (Agost), 2015-08-03)A search for B0s→D¯¯¯¯0f0(980) decays is performed using 3.0 fb1− of pp collision data recorded by the LHCb experiment during 2011 and 2012. The f0(980) meson is reconstructed through its decay to the ... -
Search for the decay D0→π+π−μ+μ−
(Physics Letters B , 2014, Vol. 728, (Gener), 2014-01-20)A search for the D0→π+π−μ+μ− decay, where the muon pair does not originate from a resonance, is performed using proton–proton collision data corresponding to an integrated luminosity of 1.0 fb−1 recorded ... -
Search for the doubly charmed baryon Ξ+ cc
(Journal of High Energy Physics, 2013, No. 90, 2013-12)A search for the doubly charmed baryon Ξ+ cc in the decay mode Ξ+ cc→ Λ + c K−π + is performed with a data sample, corresponding to an integrated luminosity of 0.65 fb−1 , of pp collisions recorded at ...