Dr. Oana Ristea

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Academic Career Length

24Years (2003-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 August 2005 in Nuclear Physics A

Journal Article

Quark–gluon plasma and color glass condensate at RHIC? The perspective from the BRAHMS experiment

I. Arsene

I.G. Bearden

D. Beavis

C. Besliu

B. Budick

Ion Sorin Zgura

+49

23 March 2017 in The European Physical Journal A

Journal Article

Challenges in QCD matter physics --The scientific programme of the Compressed Baryonic Matter experiment at FAIR

T. Ablyazimov

A. Abuhoza

R. P. Adak

M. Adamczyk

K. Agarwal

M. Zyzak

+578

10 December 2004 in Physical Review Letters

Journal Article

Evolution of the Nuclear Modification Factors with Rapidity and Centrality in

d + A u

Collisions at

\sqrt{N {}^{S}N} = 200 G e V

I. Arsene

I. G. Bearden

D. Beavis

C. Besliu

B. Budick

Ion Sorin Zgura

+46

We report on a study of the transverse momentum dependence of nuclear modification factors

R_{d A u}

for charged hadrons produced in

deuteron + gold

collisions at

\sqrt{s_{N N}} = 200 G e V

, as a function of collision centrality and of the pseudorapidity (

η = 0

, 1, 2.2, 3.2) of the produced hadrons. We find a significant and systematic decrease of

R_{d A u}

with increasing rapidity. The midrapidity enhancement and the forward rapidity suppression are more pronounced in central collisions relative to peripheral collisions. These results are relevant to the study of the possible onset of gluon saturation at energies reached at BNL RHIC.

15 August 2003 in Physical Review Letters

Journal Article

Transverse-Momentum Spectra in

A u + A u

and

d + A u

Collisions at

\sqrt{s_{N N}} = 200 G e V

and the Pseudorapidity Dependence of High-

p_{T}

Suppression

I. Arsene

I. G. Bearden

D. Beavis

C. Besliu

B. Budick

Ion Sorin Zgura

+50

We present spectra of charged hadrons from

A u + A u

and

d + A u

collisions at

\sqrt{s_{N N}} = 200 G e V

measured with the BRAHMS experiment at RHIC. The spectra for different collision centralities are compared to spectra from

p + \bar{p}

collisions at the same energy scaled by the number of binary collisions. The resulting ratios (nuclear modification factors) for central

A u + A u

collisions at

η = 0

and

η = 2.2

evidence a strong suppression in the high

p_{T}

region (

> 2 G e V / c

). In contrast, the

d + A u

nuclear modification factor (at

η = 0

) exhibits an enhancement of the high

p_{T}

yields. These measurements indicate a high energy loss of the high

p_{T}

particles in the medium created in the central

A u + A u

collisions. The lack of suppression in

d + A u

collisions makes it unlikely that initial state effects can explain the suppression in the central

A u + A u

collisions.

1 June 2009 in Physics Letters B

Journal Article

Nuclear stopping and rapidity loss in

Au + Au

collisions at

\sqrt{s_{N N}} = 62.4 GeV

I.C. Arsene

I.G. Bearden

D. Beavis

S. Bekele

C. Besliu

Ion Sorin Zgura

+37

Transverse momentum spectra of protons and anti-protons measured in the rapidity range

21 June 2007 in Physical Review Letters

Journal Article

Production of Mesons and Baryons at High Rapidity and High

p_{T}

in Proton-Proton Collisions at

\sqrt{s} = 200 GeV

I. Arsene

I. G. Bearden

D. Beavis

S. Bekele

C. Besliu

Ion Sorin Zgura

+39

We present particle spectra for charged hadrons

π^{\pm}

K^{\pm}

p

, and

\bar{p}

from

p p

collisions at

\sqrt{s} = 200 GeV

measured for the first time at forward rapidities (2.95 and 3.3). The kinematics of these measurements are skewed in a way that probes the small momentum fraction in one of the protons and large fractions in the other. Large proton to pion ratios are observed at values of transverse momentum that extend up to

4 GeV / c

, where protons have momenta up to 35 GeV. Next-to-leading order perturbative QCD calculations describe the production of pions and kaons well at these rapidities, but fail to account for the large proton yields and small

\bar{p} / p

ratios.

About Me

Oana RISTEA is Associate Professor at the Faculty of Physics, University of Bucharest. Scientific research is related to the study of the heavy-ion collisions at relativistic energies. PhD Thesis, „Predictions and experimental results obtained in Au-Au collisions at RHIC energies” presented a study related to the rapidity and centrality dependence of thermal freeze-out parameters of systems produced in Au-Au collisions at RHIC energies. Experimental data used for the analysis were collected with BRAHMS experiment and the results were obtained using the Blast-Wave model. The energy and rapidity dependence of the chemical freeze-out parameters for these collisions were studied, too. Teaching activity at graduate and master level related to courses and labs of Nuclear and Particle physics, Experimental relativistic nuclear physics, Detection methods in nuclear and particle physics.

Dr. Oana Ristea

Dr. Oana Ristea

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Representative Publications

About Me