Yields and elliptic flow of d(anti-d) and He-3(anti-He-3) in Au + Au collisions at s(NN)**(1/2) = 200- GeV

Abelev, B.I.; Aggarwal, M.M.; Ahammed, Z.; Alakhverdyants, A.V.; Anderson, B.D.; Arkhipkin, D.; Averichev, G.S.; Balewski, J.; Barannikova, O.; Barnby, L.S.

Yields and elliptic flow of d(anti-d) and He-3(anti-He-3) in Au + Au collisions at s(NN)**(1/2) = 200- GeV

STAR

Collaboration

Sep, 2009

16 pages

e-Print:

0909.0566 [nucl-ex]

Experiments:

BNL-RHIC-STAR

View in:

ADS Abstract Service

pdf

reference search43 citations

Citations per year

Abstract: (arXiv)

We present the

p_{T}

spectra, elliptic flow (

v_2

) and coalescence parameters

B_{2}

for

d

,

\bar{d}

(1<p_{T}<4 GeV/c) and

B_{3}

for

^{3}He

,

\bar{^{3}He}

(2<p_{T}<6 GeV/c) produced at mid-rapidity in Au+Au col lisions at

\sqrt{s_{_{NN}}} = 200

GeV. The results are measured in the STAR experiment at RHIC. The spectra of the light nuclei show softer

p_T

distributions than calculations from a blast-wave model in which the parameters were fixed from pion, kaon and proton

v_2

(

p_T

) and

p_T

distributions. The coalescence volume is found to track with pion HBT re sults for different collision geometries. The

v_2

measurement for

d(\overline{d})

as a function of transverse momentum

p_T

is found to follow an approximate atomic mass number (

A

) scaling while that of

^{3}He(\bar{^{3}He})

deviates slightly from the scaling. A negative

v_{2}

has been observed for

\bar{d}

at low

p_{T}

, consiste nt with large radial flow in Au+Au collisions.

OSG : STAR
heavy ion: scattering
gold
light nucleus: yield
deuteron
helium: nuclide
antinucleus: yield
transverse momentum: spectrum
elliptic flow
coalescence

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