Non-photonic electron-hadron correlations and non-photonic electron $v_2$ at STAR/RHIC

Gang Wang

doi:10.1016/j.nuclphysa.2011.02.069

paper

Non-photonic electron-hadron correlations and non-photonic electron $v_{2}$ at STAR/RHIC

arXiv:1011.5543 · doi:10.1016/j.nuclphysa.2011.02.069

Abstract

Non-photonic electrons (when $p_{T} >$ 3 GeV/ $c$ ) represent the directions of the parent heavy quarks, and their angular correlations with charged hadrons provide a unique tool to study the relative contributions from $D$ and B meson decays in p+p collisions, as well as the flavor-dependence of the energy loss mechanism in A+A collisions. We review the disentanglement of charm and bottom contributions to non-photonic electrons in p+p collisions at $s = 200$ GeV at RHIC. B decay contribution is approximately 50 $a tt h ee l ec t r o n t r an s v er se m o m e n t u m o f$ p_{T} > 5 $G e V /$ c $f r o m S T A R r es u l t s . I n cor p or a t in g t h ee n er g y l oss in f or ma t i o n o f n o n - p h o t o ni ce l ec t r o n s, t h er es u l t in d i c a t es a B m eso n s u pp r ess i o na t hi g h$ p_T $inh e a v y i o n co l l i s i o n s . W e a l so p r ese n t n o n - p h o t o ni ce l ec t r o n - ha d r o n cor r e l a t i o n s in d + A u co l l i s i o n s a s aba se l in er e f er e n ce f or t h e in v es t i g a t i o n o f t h e h e a v y q u a r k e n er g y l oss in A + A co l l i s i o n s . H e a v y q u a r k e n er g y l oss an d h e a v y q u a r k e v o l u t i o nin t h e QC D m e d i u m c an l e a d t o a f ini t e " e l l i pt i c f l o w " p a r am e t er ($ v_2 $) o f$ D $an d$ B $m eso n s w hi c h c anb es t u d i e d t h r o ug h$ v_2 $o f n o n - p h o t o ni ce l ec t r o n s . P r e l imina r y$ v_2 $m e a s u r e m e n t s f or n o n - p h o t o ni ce l ec t r o n s a r es h o w n t o b e l o w er t han$ v_2 $o f c ha r g e d ha d r o n s (or$ K_S^0 $,$ Λ$) for 200 GeV Au+Au collisions.

arXiv comment4 pages, 5 figures, proceedings for Hard Probe 2010

Non-photonic electron-hadron correlations and non-photonic electron v2​ at STAR/RHIC

Abstract

References in corpus (18)

Non-photonic electron-hadron correlations and non-photonic electron $v_{2}$ at STAR/RHIC