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PHENIX Central. High p T at RHIC. Measured in PHENIX for Charged hadrons p 0 ’s (with both PgGl and PbSc calorimeters) Observe Peripheral collisions: Good agreement with scaled p-p reference Central collisions: Clear deficit with respect to scaled reference. Is It New?.
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High pT at RHIC • Measured in PHENIX for • Charged hadrons • p0’s (with both PgGl and PbSc calorimeters) • Observe • Peripheral collisions: Good agreement with scaled p-p reference • Central collisions: Clear deficit with respect to scaled reference
Is It New? • Historically, enhancements have been seen in per-nucleon yields of high pT hadrons from proton-nucleus and nucleus-nucleus collisions: “Cronin effect” • This is the first observation of a suppression