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1–5 Sep 2017
China National Convention Center
Asia/Shanghai timezone

Longitudinal Double Spin Asymmetries of $\pi^{0}$ - Jet Correlations in Polarized Proton Collisions at $\sqrt{s}$ = 510 GeV at STAR

1 Sep 2017, 16:55
25m
302A (China National Convention Center)

302A

China National Convention Center

No.7 Tianchen East Road, Chaoyang District, Beijing 100105 China
1) Hot and dense matter physics (QGP and heavy ion collision) Hot and dense matter physics (QGP and heavy ion collision)

Speaker

Dr Yaping Wang (Institute of paticle physics, Central China Normal University)

Description

One of the primary goals of the spin physics program at STAR is to constrain the polarized gluon distribution function, Δg(x), by measuring the longitudinal double-spin asymmetry (${A}{LL})ofvariousfinal−statechannels.Usingajetinthemid−rapidityregion|\eta|<0.9correlatedwithaback−to−backneutralpionintheforwardrapidityregion0.8<\eta<2.0intheSTARendcapprovidesanewtooltoaccessthe\Delta g(x)distributionatBjorken−{x}downto0.01.Comparedtoinclusivejetmeasurements,thischannelalsoallowstoconstraintheinitialpartonkinematics,suchas{x}{1},{x}{2}andinvariantmass.Inthistalk,wewillpresentthestatusoftheanalysisofthe\pi^{0}−jet{A}{LL}inlongitudinallypolarizedproton+protoncollisionsat\sqrt{s}=510GeV,extractedfrom80pb^{-1}ofdatatakenduringthe2012RHICrun.Wealsocomparetotheoreticalpredictionsofthe{A}_{LL}$ by next-to-leading order (NLO) model calculations with different polarized parton distribution functions.

Presentation materials