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Measurements of Di-Jet π0-h± Correlations in Light-Heavy Ion Collisions at RHIC-PHENIX

Pun, Abinash
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1565706394817353

Abstract Details

2019, Doctor of Philosophy (PhD), Ohio University, Physics and Astronomy (Arts and Sciences).
The possible presence of Quark-Gluon Plasma (QGP), the new state of matter created at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) in Au+Au and Pb+Pb collisions, is currently under investigation for smaller collisions systems such as light-heavy ions and even p+p. Long range angular correlations of particles produced in p+Pb, p+Au, d+Au, and 3He+Au, show evidence of QGP collective flow, but another signature, QGP-induced jet energy loss effects has not been identified. To address this situation, in this dissertation, a recently introduced observable RI is employed in light-heavy ion collisions. RI is derived from two-particle correlation method commonly used to study jet modification from energy loss in Au+Au. π0-hadrons correlations are analyzed with RI in 3He+Au, d+Au and p+p. Modification of RI in 3He+Au is found, with suppression at high zT and hints of enhancement at low zT. This confirms the previous result of jet modification behavior in d+Au RI. When compared with d+Au, modifications in 3He+Au qualitatively follow the system size dependence. RI in 3He+Au is more suppressed than in d+Au at high zT. The ratio of RI in 3He+Au to that in d+Au at high zT (>0.48) is more than 2σ below unity. Further simulation studies compared to previous works were done for checking possibilities of the cold nuclear matter effects mimicking the modification behavior observed in data. An intrinsic kT effect from a new PYTHIA-8 study was found to be inconsistent with the 3He+Au modifications. Also, the effects due to modifications in the nuclear parton distribution function (nPDF) from PYTHIA8+EPPS16 nPDF sets were found to be much smaller and qualitatively inconsistent with modification in RI from data.
Justin Frantz (Advisor)
Julie Roche (Committee Member)
Zach Meisel (Committee Member)
Ryan Fogt (Other)
207 p.
Nuclear Physics; Particle Physics
PHENIX; d-Au; He-Au; two-particle correlation; jet suppression; energy loss; small system; QGP; RHIC; Light-Heavy

Recommended Citations

Citations

  • Pun, A. (2019). Measurements of Di-Jet π0-h± Correlations in Light-Heavy Ion Collisions at RHIC-PHENIX [Doctoral dissertation, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1565706394817353

    APA Style (7th edition)

  • Pun, Abinash. Measurements of Di-Jet π0-h± Correlations in Light-Heavy Ion Collisions at RHIC-PHENIX. 2019. Ohio University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1565706394817353.

    MLA Style (8th edition)

  • Pun, Abinash. "Measurements of Di-Jet π0-h± Correlations in Light-Heavy Ion Collisions at RHIC-PHENIX." Doctoral dissertation, Ohio University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1565706394817353

    Chicago Manual of Style (17th edition)

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This open access ETD is published by Ohio University and OhioLINK.