Navegação Ciências Exatas e da Terra por Autor "Acharya, Shreyasi"
Resultados 21-40 de 216
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Charged-particle pseudorapidity density at mid-rapidity in p–Pb collisions at √sNN = 8.16 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]The pseudorapidity density of charged particles, dNch/dη, in p–Pb collisions has been measured at a centreof- mass energy per nucleon–nucleon pair of √ sNN = 8.16 TeV at mid-pseudorapidity for non-single-diffractive events. ... -
Charm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2022) [Artigo de periódico]Recent pT-integrated cross-section measurements of the ground-state charm mesons and baryons, D0, D+, D+s, Λ+c, and Ξ0c, are used to evaluate the charm fragmentation fractions and production cross section per unit of ... -
Closing in on critical net-baryon fluctuations at LHC energies : cumulants up to third order in Pb–Pb collisions
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; ALICE Collaboration (2023) [Artigo de periódico]Fluctuation measurements are important sources of information on the mechanism of particle production at LHC energies. This article reports the first experimental results on third-order cumulants of the net-proton distributions ... -
Coherent J/ψ and ψ' photoproduction at midrapidity in ultra-peripheral Pb–Pb collisions at √sNN = 5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2021) [Artigo de periódico]The coherent photoproduction of J/ψ and ψ' mesons was measured in ultra-peripheral Pb–Pb collisions at a center-of-mass energy √sNN = 5.02 TeV with the ALICE detector. Charmonia are detected in the central rapid ity region ... -
Coherent J/ψ photoproduction at forward rapidity in ultra-peripheral Pb–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]The ALICE collaboration performed the first rapidity-differential measurement of coherent J/ψ photoproduction in ultra-peripheral Pb–Pb collisions at a center-of-mass energy √sNN=5.02 TeV. The J/ψ is detected via its dimuon ... -
Coherent photoproduction of ρ0 vector mesons in ultra-peripheral 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]Cross sections for the coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at sNN√ = 5.02 TeV are reported. The measurements, which rely on the π+π− decay channel, are presented in three regions ... -
Combinations of single-top-quark production cross-section measurements and |fLV Vtb| determinations at √s= 7 and 8 TeV with the ATLAS and CMS experiments
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]Two-particle correlations in high-energy collision experiments enable the extraction of particle source radii by using the Bose-Einstein enhancement of pion production at low relative momentum q ∝ 1/R. It was previously ... -
Constraining hadronization mechanisms with Λ+c /D0 production ratios 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 production of prompt Λ+c baryons at midrapidity (|y| < 0.5) was measured in central (0–10%) and mid-central (30–50%) Pb–Pb collisions at the center-of-mass energy per nucleon–nucleon pair √sNN = 5.02 TeV with the ALICE ... -
Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at √sNN = 2.76 and 5.02 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2020) [Artigo de periódico]Systematic studies of charge-dependent two- and three-particle correlations in Pb-Pb collisions at √ sNN = 2.76 and 5.02 TeV used to probe the Chiral Magnetic Effect (CME) are presented. These measurements are performed ... -
Constraining the KN coupled channel dynamics using femtoscopic correlations at the LHC
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2023) [Artigo de periódico]The interaction of K−with protons is characterised by the presence of several coupled channels, systems like K0 n and π with a similar mass and the same quantum numbers as the K−p state. The strengths of these couplings ... -
Constraining the magnitude of the Chiral Magnetic Effect with Event Shape Engineering in Pb–Pb collisions at √sNN=2.76TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artigo de periódico]In ultrarelativistic heavy-ion collisions, the event-by-event variation of the elliptic flow v2reflects fluctuations in the shape of the initial state of the system. This allows to select events with the same centrality ... -
Constraints on jet quenching in p–Pb collisions at √sNN=5.02 measured by the event-activity dependence of semi-inclusive hadron-jet distributions
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artigo de periódico]The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high-transverse momentum trigger hadron in p–Pb collisions at √sNN=5.02TeV. Jets are reconstructed ... -
Dielectron and heavy-quark production in inelastic and high-multiplicity proton–proton collisions at √sNN = 13 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]The measurement of dielectron production is presented as a function of invariant mass and transverse momentum (pT) at midrapidity (|ye| <0.8) in proton–proton (pp) collisions at a centre-of-mass energy of √s=13TeV. The ... -
Dielectron production at midrapidity at low transverse momentum in peripheral and semi-peripheral 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 measurement of the e+e − pair production at low lepton pair transverse momentum (pT,ee) and low invariant mass (mee) in non-central Pb–Pb collisions at √ sNN = 5.02 TeV at the LHC is presented. The dielectron ... -
Dielectron production in proton-proton and proton-lead 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 first measurements of dielectron production at midrapidity (|ηe|<0.8) in proton–proton and proton–lead collisions at √sNN=5.02TeV at the LHC are presented. The dielectron cross section is measured with the ALICE detector ... -
Dielectron production in proton-proton collisions at √s = 7 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artigo de periódico]The rst measurement of e+e pair production at mid-rapidity (j ej < 0.8) in pp collisions at p s = 7TeV with ALICE at the LHC is presented. The dielectron production is studied as a function of the invariant mass (mee < ... -
Direct observation of the dead-cone effect in quantum chromodynamics
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti (2022) [Artigo de periódico]In particle collider experiments, elementary particle interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, as described by the theory of ... -
Direct photon elliptic flow in Pb–Pb collisions at √sNN = 2.76 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]The elliptic flow of inclusive and direct photons was measured at mid-rapidity in two centrality classes 0–20% and 20–40% in Pb–Pb collisions at √sNN=2.76TeV by ALICE. Photons were detected with the highly segmented ... -
Direct photon production at low transverse momentum in proton-proton collisions at √s = 2.76 and 8 TeV
Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artigo de periódico]Measurements of inclusive and direct photon production at midrapidity in pp collisions at √ s = 2.76 and 8 TeV are presented by the ALICE experiment at the LHC. The results are reported in transverse momentum ranges of 0.4 ... -
D-meson azimuthal anisotropy in midcentral 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 azimuthal anisotropy coefficient v2 of prompt D0 , Dþ , D*þ , and Dþs mesons was measured in midcentral (30%–50% centrality class) Pb-Pb collisions at a center-of-mass energy per nucleon pair √sNN¼ 5.02 TeV, with the ...