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Bulunan: 75 Adet 0.021 sn
Yayın Tarihi : 2019 ✕Yazar/lar : KARASU UYSAL, Ayben ✕
Koleksiyon [3]
İlgili Araştırmacılar [1]
Ambargo Durumu [1]
Tam Metin [1]
Yayın Türü [1]
Yazar/lar [2]
Atıf Dizini [3]
Konu Başlıkları [20]
Yayıncı [8]
Yayın Tarihi [1]
Yayın Dili [2]
Erişime Açık

Coherent J/ψ photo production at forward rapidity in ultra-peripheral Pb–Pb collisions at sNN = 5.02 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

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 decay in the forward rapidity region (−4.0

Makale 2019 7 Görüntülenme
Erişime Açık

Measurement of jet radial profiles in Pb–Pb collisions at sNN = 2.76 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The jet radial structure and particle transverse momentum (pT) composition within jets are presented in centrality-selected Pb–Pb collisions at √sNN = 2.76 TeV. Track-based jets, which are also called charged jets, were reconstructed with a resolution parameter of R = 0.3 at midrapidity |ηch jet| < 0.6 for transverse momenta pT, ch jet = 30–120 GeV/c. Jet–hadron correlations in relative azimuth and pseudorapidity space (φ,η) are measured to study the distribution of the associated particles around the jet axis for different pT,assoc-ranges between 1 and 20 GeV/c. The data in Pb–Pb collisions a ...Daha fazlası

Makale 2019 11 Görüntülenme
Erişime Açık

Exploring the Phase Space of Jet Splittings at ALICE using Grooming and Recursive Techniques

KARASU UYSAL, Ayben | ALICE Collaboration

Hard splittings in the evolution of a hard scattered parton may be modified by the presence of a dense strongly interacting medium. Grooming procedures can be used to isolate such hard components of a jet and allows one to focus on the two subjets resulting from a sufficiently hard partonic splitting. Measurements of the symmetry parameter (z(g)), angular separation (R-g) and number of splittings (n(SD)) of Soft Drop groomed jets are reported as measured with the ALICE Detector in pp and Pb-Pb collisions at root s = 7 TeV and root s(NN) = 2.76 TeV, respectively. The use of recursive splittings ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 3 Görüntülenme
Erişime Açık

Study of the Λ–Λ interaction with femtoscopy correlations in and p–Pb collisions at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

This work presents new constraints on the existence and the binding energy of a possible Λ-Λ bound state, the H-dibaryon, derived from Λ-Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in pp collisions at s√=13 TeV and p-Pb collisions at sNN‾‾‾‾√=5.02 TeV, combined with previously published results from p-Pb collisions at s√=7 TeV. The Λ-Λ scattering parameter space, spanned by the inverse scattering length f−10 and the effective range d0, is constrained by comparing the measured Λ-Λ correlation function with ...Daha fazlası

Makale 2019 13 Görüntülenme
Erişime Açık

Measurement of charged jet cross section in pp collisions at 5.02 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The cross section of jets reconstructed from charged particles is measured in the transverse momentum range of 5 < pT < 100 GeV=c in pp collisions at the center-of-mass energy of s 1⁄4 5.02 TeV with theALICE detector. The jets are reconstructed using the anti-kT algorithm with resolution parameters R 1⁄4 0.2, 0.3, 0.4, and 0.6 in the pseudorapidity range jηj < 0.9 − R. The charged jet cross sections are compared with the leading-order (LO) and to next-to-leading-order (NLO) perturbative quantum chromodynamics (pQCD) calculations. It is found that the NLO calculations agree better with the meas ...Daha fazlası

Makale 2019 4 Görüntülenme
Erişime Açık

Multiplicity dependence of light-flavor hadron production in pp collisions at √s = 7 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

Comprehensive results on the production of unidentified charged particles, π±, K±, K0S, K*(892)0, p, p¯¯¯, ϕ(1020), Λ, Λ¯¯¯¯, Ξ−, Ξ¯¯¯¯+, Ω− and Ω¯¯¯¯+ hadrons in proton-proton (pp) collisions at s√ = 7 TeV at midrapidity (|y|

Makale 2019 3 Görüntülenme
Erişime Açık

Event-shape and multiplicity dependence of freeze-out radii in pp collisions at √s = 7 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

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 observed that in pp collisions at √s = 7 TeV the average pair transverse momentum kT range of such analyses is limited due to large background correlations which were attributed to mini-jet phenomena. To investigate this further, an event-shape dependent analysis of Bose-Einstein correlations for pion pairs is performed in this work. By categorizing the events by their transver ...Daha fazlası

Makale 2019 10 Görüntülenme
Erişime Açık

Measurement of the inclusive isolated photon production cross section in pp collisions at √s = 7 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

The production cross section of inclusive iso- lated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at a centre-of-momentum energy of √s = 7 TeV. The measurement is performed with the electromagnetic calorimeter EMCal and the central track- ing detectors, covering a range of |η| < 0.27 in pseudora- pidity and a transverse momentum range of 10 < pTγ < 60 GeV/c. The result extends the pT coverage of previously published results of the ATLAS and CMS experiments at the same collision energy to smaller pT. The measurement is compared to next-to-leading order pert ...Daha fazlası

Makale 2019 16 Görüntülenme
Erişime Açık

Direct photon production at low transverse momentum in proton–proton collisions at √ s = 2.76 and 8 TeV

KARASU UYSAL, Ayben | ALICE Collaboration

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

Makale 2019 American Physical Society 9 Görüntülenme
Erişime Açık

Event-shape- and multiplicity-dependent identified particle production in pp collisions at 13 TeV with ALICE at the LHC

KARASU UYSAL, Ayben | ALICE Collaboration

Multiplicity-dependent measurements of identified particle production led to the discovery of collective-like behavior in pp collisions at the LHC. Better understanding of the effects attributed to well-understood physics, like multiple hard scatterings, is required to establish whether this behaviour is truly collective in origin. Experimentally, those effects can be controlled using event shapes, like transverse spherocity, which allows the classification of pp collisions either as jetty or isotropic events. The transverse momentum (p(T)) spectra of light-flavor hadrons in pp collisions meas ...Daha fazlası

Makale 2019 ELSEVIER SCIENCE BV 4 Görüntülenme
Erişime Açık

ALICE results on system-size dependence of charged-particle multiplicity density in p-Pb, Pb-Pb and Xe-Xe collisions

KARASU UYSAL, Ayben | ALICE Collaboration

Particle production at LHC energies involves the interplay of hard (perturbative) and soft (non-perturbative) QCD processes. Global observables, such as the charged-particle multiplicity, are related to the initial geometry and the energy density produced in the collision. They are important to characterise relativistic heavy-ion collisions and to constrain model calculations. The LHC produced Xenon-Xenon collisions for the first time in October 2017. New results on the primary charged-particle pseudorapidity density, and its pseudorapidity and centrality dependence are presented for this ligh ...Daha fazlası

Makale 2019 ELSEVIER 4 Görüntülenme
Erişime Açık

Multiplicity dependence of (anti-)deuteron production in pp collisions at s=7TeV

KARASU UYSAL, Ayben | ALICE Collaboration

In this letter, the production of deuterons and anti-deuterons in pp collisions at s=7 TeV is studied as a function of the charged-particle multiplicity density at mid-rapidity with the ALICE detector at the LHC. Production yields are measured at mid-rapidity in five multiplicity classes and as a function of the deuteron transverse momentum (pT). The measurements are discussed in the context of hadron � coalescence models. The coalescence parameter B2, extracted from the measured spectra of (anti-)deuterons and primary (anti-)protons, exhibits no significant pT-dependence for pT

Makale 2019 Elsevier B.V. 2 Görüntülenme
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