measurements in p+p, p+Au and Au+Au collisions from the STAR ...

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Feb 7, 2017 - SBS : internal energy as heavy quark potential. • Liu, Chen, Xu, Zhuang [PLB 697 (2011) 32]. ▫ Feed do
𝛶 measurements in p+p, p+Au and Au+Au collisions from the STAR experiment Zaochen Ye for the STAR Collaboration University of Illinois at Chicago

Outline Ø Quarkonium as a probe of QGP

Ø STAR experiment Ø New 𝛶 measurements at STAR in different systems: q p+p 200 and 500 GeV q p+Au 200 GeV q Au+Au 200 GeV Ø Comparison with LHC results and model calculations Ø Summary and outlook

2/7/17

Zaochen  Ye    QM2017  Chicago

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Quarkonia as a thermometer for QGP , 𝛶…

QGP Thermometer

Quarkonia melt in QGP due to color screening effect --------- T.Matsui and H. Satz (1986) [A.Mocsy, EPJ C61 (2009) 705]

Bottomonia, compared to charmonia at RHIC: • Regeneration is negligible [A. Emerick, X. Zhao & R. Rapp EPJ A48 (2012) 72]

• Co-mover absorption is negligible [Lin & Ko, PLB 503 (2001) 104]

à a cleaner probe 2/7/17

Zaochen Ye QM2017 Chicago

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The Solenoidal Tracker At RHIC (STAR) Ø TPC o Tracking, momentum o dE/dx

Ø BEMC Trigger on and identify electrons o p/E

Ø MTD (|η|

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