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Bulunan: 31 Adet 0.001 sn
Yayıncı : ELSEVIER SCIENCE BV ✕
Koleksiyon [3]
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Ambargo Durumu [1]
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Atıf Dizini [1]
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Erişime Açık

Energy dependence of φ(1020) production at mid-rapidity in pp collisions with ALICE at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

Hadronic resonances are unique tools to investigate the interplay of re-scattering and regeneration effects during the hadronization phase in heavy-ion collisions. Measurements in small collision systems provide a necessary baseline for heavy-ion data, help to tune pQCD inspired event generators and give insight into the search for the onset of collective effects. As the phi meson has a longer lifetime compared to other resonances, it is expected that its production would be much less affected by regeneration and re-scattering processes. We report on measurements of phi meson production in min ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 3 Görüntülenme
Erişime Açık

Heavy-flavour hadron decay leptons in Pb-Pb and Xe-Xe collisions at the LHC with ALICE

KARASU UYSAL, Ayben | ALICE Collaboration

Heavy quarks, i.e. charm and beauty, are sensitive probes of the medium produced in high-energy heavy-ion collisions. They are produced in the early stage of the collision, mainly in hard partonic scattering processes, and are expected to experience the whole collision evolution interacting with the medium constituents via both elastic and inelastic processes. The nuclear modification factor (R-AA) is one of the main experimental observables that allow us to investigate the interaction strength of heavy quarks with the medium. The ALICE collaboration measured the production of open heavy-flavo ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 4 Görüntülenme
Erişime Açık

Measurements of heavy-flavour correlations and jets with ALICE at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

In this work, the latest heavy-flavour correlation and jet measurements at mid-rapidity with the ALICE detector in pp, p-Pb and Pb-Pb collisions from the LHC Run 2 are reported. In particular, the results of azimuthal correlation measurements of D mesons with charged particles in pp collisions at root s = 13 TeV and in p-Pb collisions at root S-NN = 5.02 TeV are presented. Studies on the centrality-dependent azimuthal correlations of heavy-flavour hadron decay electrons with charged particles in Pb Pb collisions at root S-NN = 5.02 TeV are shown. In addition, measurements of D-meson tagged jet ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 1 Görüntülenme
Erişime Açık

Quarkonium measurements in nucleus-nucleus collisions with ALICE

KARASU UYSAL, Ayben | ALICE Collaboration

Quarkonia, i.e. bound states of b (b) over bar and c (c) over bar quarks, are powerful observables to study the properties of nuclear matter under extreme conditions. The formation of a Quark-Gluon Plasma (QGP), which is predicted by lattice QCD calculations at high temperatures as reached at the LHC energies, has a strong influence on the production and behavior of quarkonia. The latest ALICE results on bottomonium and charmonium production in nucleus-nucleus collisions are presented. This includes measurements of the gamma(1S) and gamma(2S) nuclear modification factor (R-AA) at forward rapid ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 3 Görüntülenme
Erişime Açık

f0(980) resonance production in pp collisions with the ALICE detector at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

We report on a preliminary study of the production of f(0)(980) -> pi(+)pi(-) at mid-rapidity (vertical bar y vertical bar < 0.5) performed with the ALICE detector at the LHC in minimum bias pp collisions at the centre-of-mass energy root s = 5.02 TeV. The f(0)(980) signal extraction is challenging due to the large background from correlated pi(+)pi(-) pairs from other resonance decays in the invariant mass window under study, as well as due to the combinatorics from uncorrelated pairs. We present the strategy for the signal extraction and first results in terms of p(T)-dependent production yi ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 6 Görüntülenme
Erişime Açık

Quarkonium production in p-Pb collisions with ALICE

KARASU UYSAL, Ayben | ALICE Collaboration

ALICE has measured quarkonium production in p-Pb collisions at backward (-4.46 < y(cms) < 2.96), mid (-1.37 < y(cms) < 0.43) and forward (2.03 < y(cms) < 3,53) rapidity (y) regions down to zero transverse momentum (p(T)). The inclusive J/psi production has been studied at mid-y in p-Pb interactions at root S-NN = 5.02 TeV and at forward and backward y in p-Pb collisions at root S-NN = 5.02 TeV and 8.16 TeV. The comparison of the J/psi production to the one of the loosely bound psi(2S) state is discussed, together with new results on the nuclear modification factors of the gamma(1S) and gamma(2 ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 8 Görüntülenme
Erişime Açık

Elliptic flow of identified hadrons in small collisional systems measured with ALICE

KARASU UYSAL, Ayben | ALICE Collaboration

Recent observations of long-range multi-particle azimuthal correlations in p-Pb and high multiplicity pp collisions provided new insights into collision dynamics and opened a possibility to study collective effects in these small systems. New measurements of p(T)-differential elliptic flow (v(2)) coefficient for inclusive charged hadrons as well as a variety of identified particle species in p-Pb collisions at root s(NN) = 5.02 TeV are presented. The data was collected by ALICE during the LHC Run 2 data taking. Besides high precision measurements of v(2)(P-T) for pi(+/-), K-+/- and p((p) over ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 9 Görüntülenme
Erişime Açık

Multiplicity dependence of strangeness and hadronic resonance production in pp and p-Pb collisions with ALICE at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

One of the key results of the LHC Run 1 was the observation of an enhanced production of strange particles in high multiplicity pp and p-Pb collisions at,root s(NN) 7 and 5.02 TeV, respectively. The strangeness enhancement is investigated by measuring the evolution with multiplicity of single-strange and multi-strange baryon production relative to non-strange particles. A smooth increase of strange particle yields relative to the non-strange ones with event multiplicity has been observed in such systems. We report the latest results on multiplicity dependence of strange and multi-strange hadro ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 5 Görüntülenme
Erişime Açık

ALICE measurements of flow coefficients and their correlations in small (pp and p-Pb) and large (Xe-Xe and Pb-Pb) collision systems

KARASU UYSAL, Ayben | ALICE Collaboration

Many observables which are used as a signature of the collective effects in heavy-ion collisions when measured in high multiplicity pp and pA interactions reveal a very similar behaviour. We will present first measurements of different order flow coefficients and their magnitude correlations for data collected by ALICE during the LHC Run 2 operation, which includes pp collisions at root s = 13 TeV, p-Pb at root s(NN)= 5.02 TeV, Xe-Xe at root sNN = 5.44 TeV and Pb-Pb collisions at root s(NN) = 5.02 TeV. Such a broad spectrum of colliding systems with different energies and wide range of multipl ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 3 Görüntülenme
Erişime Açık

Addressing the hypertriton lifetime puzzle with ALICE at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

The ALICE Collaboration collected a large data sample of Pb-Pb collisions at root S-NN = 5.02 TeV in 2015 at the Large Hadron Collider (LHC) and the excellent particle identification (PID) capabilities allow for the detection of rarely produced (anti-)hypernuclei. In particular, the (anti-)hypertriton, H-3(Lambda), which is a bound state of a proton, a neutron and a A, is the lightest known hypernucleus. The results on the H-3(Lambda) production are compared with the predictions from a model based on coalescence approach and from statistical-thermal models to investigate the production mechani ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 2 Görüntülenme
Erişime Açık

Balance functions of (un)identified hadrons in Pb-Pb, p-Pb, and pp collisions at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

In ultrarelativistic heavy-ion collisions, correlations of particles with opposite quantum numbers provide insight into quark production mechanisms and time scales, collective motion, and re-scattering in the hadronic phase. The longitudinal and azimuthal widths of balance functions for charged kaons and charged pions are used to examine the two-wave quark production model proposed to explain quark-antiquark production within the QGP, which predicts a large increase in up and down quark pairs relative to strange quark pairs around the time of hadronization. Balance functions are also analyzed ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 2 Görüntülenme
Erişime Açık

Investigating correlated fluctuations of conserved charges with net-Λ fluctuations in Pb–Pb collisions at ALICE

KARASU UYSAL, Ayben | ALICE Collaboration

Event-by-event fluctuations of conserved charges such as electric charge, strangeness, and baryon number - in ultrarelativistic heavy-ion collisions provide insight into the properties of the quark-gluon plasma and the QCD phase diagram. They can be related to the higher moments of the multiplicity distributions of identified particles, such as the A baryon which carries both strangeness and baryon number and is thus of particular interest. We present the first measurement of net-A fluctuations in Pb-Pb collisions at root s(NN)=5.02 TeV as a function of centrality and the pseudorapidity accept ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 6 Görüntülenme
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