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Filtreler
Filtreler
Bulunan: 300 Adet 0.007 sn
Yazar/lar : ALICE Collaboration ✕
Koleksiyon [3]
İlgili Araştırmacılar [1]
Ambargo Durumu [1]
Tam Metin [2]
Yayın Türü [3]
Yazar/lar [3]
Atıf Dizini [3]
Konu Başlıkları [20]
Yayıncı [11]
Yayın Tarihi [10]
Yayın Dili [2]
Erişime Açık

Measurement of D0, D+, D∗+ and D+ production in pp collisions s = 5.02 TeV with ALICE

KARASU UYSAL, Ayben | ALICE Collaboration

The measurements of the production of prompt D0 , D+ , D∗+ , and D+s mesons in proton–proton (pp) col- lisions at √s = 5.02 TeV with the ALICE detector at the Large Hadron Collider (LHC) are reported. D mesons were reconstructed at mid-rapidity (|y| < 0.5) via their hadronic decay channels D0 → K−π+, D+ → K−π+π+, D∗+ → D0π+ → K−π+π+, D+s → φπ+ → K+K−π+, and their charge conjugates. The production cross sections were measured in the transverse momentum interval 0 < pT < 36GeV/cforD0,1 < pT < 36GeV/cforD+ and D∗+, and in 2 < pT < 24 GeV/c for D+s mesons. Thanks to the higher integrated luminosit ...Daha fazlası

Makale 2019 3 Görüntülenme
Erişime Açık

Azimuthal anisotropy of D-meson production in Pb-Pb collisions at √sN N = 2.76 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The production of the prompt charmed mesons D0, D+, and D∗+ relative to the reaction plane was measured in Pb-Pbcollisionsatacenter-of-massenergypernucleon-nucleoncollisionof√sNN =2.76TeVwiththeALICE detector at the CERN Large Hadron Collider. D mesons were reconstructed via their hadronic decays at central rapidity in the transverse-momentum (pT ) interval 2–16 GeV/c. The azimuthal anisotropy is quantified in terms of the second coefficient v2 in a Fourier expansion of the D-meson azimuthal distribution and in terms of the nuclear modification factor RAA, measured in the direction of the reac ...Daha fazlası

Makale 2014 3 Görüntülenme
Erişime Açık

D-meson production in p-Pb collisions at √sNN = 5.02 TeV and in pp collisions at √s = 7 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

In the context of the investigation of the quark gluon plasma produced in heavy-ion collisions, hadrons containing heavy (charm or beauty) quarks play a special role for the characterization of the hot and dense medium created in the interaction. The measurement of the production of charm and beauty hadrons in proton– proton collisions, besides providing the necessary reference for the studies in heavy-ion reactions, constitutes an important test of perturbative quantum chromodynamics (pQCD) calculations. Heavy-flavor production in proton–nucleus collisions is sensitive to the various effects ...Daha fazlası

Makale 2016 6 Görüntülenme
Erişime Açık

Measurement of D-meson production at mid-rapidity in pp collisions at √s = 7 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The production cross sections for prompt charmed mesons D0 , D+ , D∗+ and D+s were measured at mid-rapidity in proton–proton collisions at a centre-of-mass energy √s = 7 TeV with the ALICE detector at the Large Hadron Collider (LHC). D mesons were reconstructed from their decays D0 → K−π+, D+ → K−π+π+, D∗+ → D0π+, D+s → φπ+ → K−K+π+, and their charge conju- gates.With respect to previous measurements in the same rapidity region, the coverage in transverse momentum ( pT ) is extended and the uncertainties are reduced by a factor of about two. The accuracy on the estimated total cc produc- tion ...Daha fazlası

Makale 2017 4 Görüntülenme
Erişime Açık

Dielectron and heavy-quark production in inelastic and high-multiplicity proton–proton collisions at √s = 13 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The measurement of dielectron production is presented as a function of invariant mass and transverse momentum (pT) at midrapidity (|ye|

Makale 2019 2 Görüntülenme
Erişime Açık

Measurement of deuteron spectra and elliptic flow in Pb–Pb collisions at √sNN = 2.76 TeV at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

The transverse momentum ( pT ) spectra and elliptic flow coefficient (v2) of deuterons and anti-deuterons at mid-rapidity (|y| < 0.5) are measured with the ALICE detector at the LHC in Pb–Pb collisions at √sNN = 2.76 TeV. The measurement of the pT spectra of (anti-)deuterons is done up to 8 GeV/c in 0–10% centrality class and up to 6 GeV/c in 10–20% and 20–40% centrality classes. The v2 is measured in the 0.8 < pT < 5 GeV/c interval and in six dif- ferent centrality intervals (0–5, 5–10, 10–20, 20–30, 30–40 and 40–50%) using the scalar product technique. Measured π ± , K± and p+p transverse-mo ...Daha fazlası

Makale 2017 4 Görüntülenme
Erişime Açık

Production of deuterons, tritons, 3He nuclei, and their antinuclei in pp collisions at √s = 0.9, 2.76, and 7 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

Invariant differential yields of deuterons and antideuterons in pp collisions at √s = 0.9, 2.76 and 7 TeV and the yields of tritons, 3He nuclei, and their antinuclei at √s = 7 TeV have been measured with the ALICE detector at the CERN Large Hadron Collider. The measurements cover a wide transverse momentum (pT) range in the rapidity interval |y| < 0.5, extending both the energy and the pT reach of previous measurements up to 3 GeV/c for A = 2 and 6 GeV/c for A = 3. The coalescence parameters of (anti)deuterons and 3He nuclei exhibit an increasing trend with pT and are found to be compatible wi ...Daha fazlası

Makale 2018 1 Görüntülenme
Erişime Açık

Dielectron production in proton-proton collisions at s√ = 7 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The first measurement of e+e− pair production at mid-rapidity (|ηe| < 0.8) in pp collisions at s√=7 TeV with ALICE at the LHC is presented. The dielectron production is studied as a function of the invariant mass (mee < 3.3 GeV/c2), the pair transverse momentum (pT,ee < 8 GeV/c), and the pair transverse impact parameter (DCAee), i.e., the average distance of closest approach of the reconstructed electron and positron tracks to the collision vertex, normalised to its resolution. The results are compared with the expectations from a cocktail of known hadronic sources and are well described when ...Daha fazlası

Makale 2018 2 Görüntülenme
Erişime Açık

Measurement of dielectron production in central Pb-Pb collisions at √sNN = 2.76 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The first measurement of dielectron (e+e−) production in central (0–10%) Pb–Pb collisions at √sNN = 2.76TeV at the LHC is presented. The dielectron invariant-mass spectrum is compared to the expected contributions from hadron decays in the invariant-mass range 0 < mee < 3.5 GeV/c2. The ratio of data and the cocktail of hadronic contributions without vacuum ρ0 is measured in the invariant-mass range 0.15 < mee < 0.7 GeV/c2, where an excess of dielectrons is observed in other experiments, and its value is 1.40 ± 0.28 (stat.) ± 0.08 (syst.) ± 0.27 (cocktail). The dielectron spectrum measured in t ...Daha fazlası

Makale 2019 3 Görüntülenme
Erişime Açık

Measurement of dijet kT in p–Pb collisions at √sNN = 5.02 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

A measurement of dijet correlations in p–Pb collisions at √sNN = 5.02 TeV with the ALICE detector is presented. Jets are reconstructed from charged particles measured in the central tracking detectors and neutral energy deposited in the electromagnetic calorimeter. The transverse momentum of the full jet (clustered from charged and neutral constituents) and charged jet (clustered from charged particles only) is corrected event-by-event for the contribution of the underlying event, while corrections for underlying event fluctuations and finite detector resolution are applied on an inclusive bas ...Daha fazlası

Makale 2015 2 Görüntülenme
Erişime Açık

Elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity in Pb–Pb collisions at √sNN = 2.76 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The elliptic flow of electrons from heavy-flavour hadron decays at mid-rapidity (|y| < 0.7) is measured in Pb–Pb collisions at √sNN = 2.76 TeV with ALICE at the LHC. The particle azimuthal distribution with respect to the reaction plane can be parametrized with a Fourier expansion, where the second coefficient (v2) represents the elliptic flow. The v2 coefficient of inclusive electrons is measured in three centrality classes (0–10%, 10–20% and 20–40%) with the event plane and the scalar product methods in the transverse momentum (pT) intervals 0.5–13GeV/c and 0.5–8GeV/c, respectively. After su ...Daha fazlası

Diğer 2016 3 Görüntülenme
Erişime Açık

Search for weakly decaying

KARASU UYSAL, Ayben | ALICE Collaboration

We present results of a search for two hypothetical strange dibaryon states, i.e. the H-dibaryon and the possible !n bound state. The search is performed with the ALICE detector in central (0–10%) Pb– Pb collisions at √sNN = 2.76 TeV, by invariant mass analysis in the decay modes !n → dπ+ and Hdibaryon → !pπ−. No evidence for these bound states is observed. Upper limits are determined at 99% confidence level for a wide range of lifetimes and for the full range of branching ratios. The results are compared to thermal, coalescence and hybrid UrQMD model expectations, which describe correctly the ...Daha fazlası

Makale 2016 1 Görüntülenme
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