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[PAST EVENT] Physics Seminar
December 3, 2015
3:30pm - 4:30pm
Abstract:
Nearly three decades ago, the proton spin puzzle emerged when measurements at EMC showed that the quark contribution to the proton spin was only 30%. Since then there have been significant theoretical and experimental efforts resulting in our current understanding that the spin of the proton is formed by the partons (quarks and gluons) and possibly their motion inside the proton (orbital angular momentum). The PHENIX and STAR experiments at the Relativistic Heavy Ion Collider at Brookhaven National Lab have brought significant contributions to the field.
This talk will focus on results from two of the benchmark experiments conducted at PHENIX: the \pi^0 longitudinal double spin asymmetry that is being used to constrain the gluon spin contribution and the large parity violating single spin asymmetry of lepton decays from W/Z which is used to constrain the anti-quark contribution. Finally the future of the field will be discussed in light of measurements proposed at the Electron Ion Collider.
Nearly three decades ago, the proton spin puzzle emerged when measurements at EMC showed that the quark contribution to the proton spin was only 30%. Since then there have been significant theoretical and experimental efforts resulting in our current understanding that the spin of the proton is formed by the partons (quarks and gluons) and possibly their motion inside the proton (orbital angular momentum). The PHENIX and STAR experiments at the Relativistic Heavy Ion Collider at Brookhaven National Lab have brought significant contributions to the field.
This talk will focus on results from two of the benchmark experiments conducted at PHENIX: the \pi^0 longitudinal double spin asymmetry that is being used to constrain the gluon spin contribution and the large parity violating single spin asymmetry of lepton decays from W/Z which is used to constrain the anti-quark contribution. Finally the future of the field will be discussed in light of measurements proposed at the Electron Ion Collider.