Navegação Ciências Exatas e da Terra por Autor "Pereira, Luis Gustavo"
Resultados 1-20 de 256
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Accessing the strong interaction between baryons and charged kaons with the femtoscopy technique at the LHC
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; ALICE Collaboration (2023) [Artigo de periódico]The interaction between baryons and kaons/antikaons is a crucial ingredient for the strangeness S = 0 and S = −2 sector of the meson–baryon interaction at low energies. In particular, the K might help in understanding the ... -
Analysis of the apparent nuclear modification in peripheral Pb–Pb collisions at 5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]Charged -particle spectra at midrapidity are measured in Pb–Pb collisions at the centre-of-mass energy per nucleon–nucle on pair √sNN=5.02 TeV and presented in centrality classes ranging from most central (0–5%)to most ... -
Anisotropic flow and flow fluctuations of identified hadrons in Pb–Pb collisions at √sNN = 5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; ALICE Collaboration (2023) [Artigo de periódico]The first measurements of elliptic flow of π ±, K±, p+¯p, K0 S , Λ+Λ, φ, Ξ − +Ξ + , and Ω − + Ω + using multiparticle cumulants in Pb–Pb collisions at √sNN = 5.02 TeV are presented. Results obtained with two- (v2{2}) and ... -
Anisotropic flow in Xe–Xe collisions at √sNN = 5.44 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artigo de periódico]The first measurements of anisotropic flow coefficients vnfor mid-rapidity charged particles in Xe–Xe collisions at √sNN=5.44TeV are presented. Comparing these measurements to those from Pb–Pb collisions at √sNN=5.02TeV, ... -
Anisotropic flow of identified hadrons in Xe-Xe collisions at √sNN = 5.44 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2021) [Artigo de periódico]Measurements of elliptic (v2) and triangular (v3) flow coefficients of π ±, K±, p+p, K0 S , and Λ+Λ obtained with the scalar product method in Xe-Xe collisions at √ sNN = 5.44 TeV are presented. The results are obtained ... -
Anisotropic flow of identified particles in Pb-Pb collisions at √sNN = 5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artigo de periódico]The elliptic (v2), triangular (v3), and quadrangular (v4) ow coe cients of , K , p + p, + , K0 S, and the -meson are measured in Pb-Pb collisions at p sNN = 5:02TeV. Results obtained with the scalar product method are ... -
(Anti-)deuteron production in pp collisions at √s=13 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2020) [Artigo de periódico]The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of ... -
Antiparallel interface coupling evidenced by negative rotatable anisotropy in IrMn/NiFe bilayers
Schäfer, Deise; Grande, Pedro Luis; Pereira, Luis Gustavo; Azevedo, Gustavo de Medeiros; Oliveira, Artur Harres de; Sousa, Marcos Antonio de; Pelegrini, Fernando; Geshev, Julian Penkov (2015) [Artigo de periódico]Negative rotatable anisotropy is estimated via ferromagnetic resonance measurements in as-made, annealed, and ion-irradiated IrMn3/Ni81Fe19 bilayers. Opposite to previous observations, inverse correlation between rotatable ... -
Augular dependence of the exchange bias obtained from magnetization and ferromagnetic resonance measurements in exchange-coupled bilayers
Geshev, Julian Penkov; Pereira, Luis Gustavo; Schmidt, Joao Edgar (2001) [Artigo de periódico]Theoretical calculations of the angular dependence of the exchange bias field in ferromagnetic/ antiferromagnetic bilayers were carried out in the framework of a model assuming the formation of a planar domain wall at the ... -
Azimuthal anisotropy of heavy-flavor decay electrons in p-Pb collisions at √sNN=5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity (|η| < 0.8) are measured in p-Pb collisions at √sNN p ¼ 5.02 TeV. The analysis is carried out for the 0%–20% (high) and 60%–100% ... -
Azimuthal correlations of heavy-flavor hadron decay electrons with charged particles in pp and p–Pb collisions at √sNN = 5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; ALICE Collaboration (2023) [Artigo de periódico]The azimuthal (ϕ) correlation distributions between heavy-flavor decay electrons and associated charged particles are measured in pp and p–Pb collisions at √sNN = 5.02 TeV. Results are reported for electrons with transverse ... -
Azimuthal correlations of prompt D mesons with charged particles in pp and p–Pb collisions at √sNN=5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2020) [Artigo de periódico]The measurement of the azimuthal-correlation function of prompt D mesons with charged particles in pp collisions at √s = 5.02 TeV and p–Pb collisions at √sNN = 5.02 TeV with the ALICE detector at the LHC is reported. The ... -
Azimuthally differential pion femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
Adamova, Dagmar; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2017) [Artigo de periódico]We present the first azimuthally differential measurements of the pion source size relative to the second harmonic event plane in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon pair of sNN p ¼ 2.76 TeV. ... -
Azimuthally-differential pion femtoscopy relative to the third harmonic event plane in Pb–Pbcollisions at √sNN = 2.76 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artigo de periódico]Azimuthally-differential femtoscopic measurements, being sensitive to spatio-temporal characteristics of the source as well as to the collective velocity fields at freeze out, provide very important information on the ... -
Calculation of the temperature dependence of the giant mr and application to Co/Cu multilayers
Duvail, Jean-Luc; Fert, Albert R.; Pereira, Luis Gustavo; Lottis, Daniel Kurt (1994) [Artigo de periódico]Most theoretical models of the giant magnetoresistance (GMR) in metallic magnetic multilayers developed up to now are for the zero-temperature limit, thus neglecting the spin-flip scattering arising from spin fluctuations ... -
Calibration of the photon spectrometer PHOS of the ALICE experiment
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]The procedure for the energy calibration of the high granularity electromagnetic calorimeter PHOS of the ALICE experiment is presented. The methods used to perform therelative gain calibration, to evaluate the geometrical ... -
Centrality and pseudorapidity dependence of the charged-particle multiplicity density in Xe–Xe collisions at √sNN = 5.44 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]In this Letter, the ALICE Collaboration presents the first measurements of the charged-particle multiplicity density, dNch/dη, and total charged-particle multiplicity, Ntotch, in Xe–Xecollisions at a centre-of-mass energy ... -
Centrality and transverse momentum dependence of inclusive J/ψ production at midrapidity in Pb–Pb collisions at √sNN = 5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2020) [Artigo de periódico]The inclusive J/ψ meson production in Pb–Pb collisions at a center-of-mass energy per nucleon–nucleon collision of √sNN = 5.02 TeV at midrapidity (|y| < 0.9) is reported by the ALICE Collaboration. The measurements are ... -
Centrality dependence of J/ψ and ψ(2S) production and nuclear modification in p-Pb collisions at √sNN = 8.16 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2021) [Artigo de periódico]The inclusive production of the J/ψ and ψ(2S) charmonium states is studied as a function of centrality in p-Pb collisions at a centre-of-mass energy per nucleon pair √ sNN = 8.16 TeV at the LHC. The measurement is performed ... -
Centrality dependence of the pseudorapidity density distribution for charged particles in Pb–Pb collisions at √sNN=5.02TeV
Adam, Jaroslav; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2017) [Artigo de periódico]We present the charged-particle pseudorapidity density in Pb–Pb collisions at √sNN=5.02TeVin centrality classes measured by ALICE. The measurement covers a wide pseudorapidity range from −3.5to 5, which is sufficient for ...