Sharang Rav Sharma
My research work aims to study the Quantum chromodynamics (QCD) phase diagram and freeze-out dynamics of the medium created in heavy-ion collisions at RHIC. A Beam Energy Scan (BES) program has been initiated at RHIC to explore the QCD phase diagram, study the signatures of phase transition between Quark Gluon Plasma (QGP) and hadronic matter, and the possible QCD critical point. The first phase of the BES program (BES-I) was completed in 2014, where Au+Au collisions were studied in the center-of-mass energy range from 7.7 to 39 GeV. This program has narrowed down the exciting regions of the phase diagram and has identified critical observables for understanding the QCD phase structure. However, several vital measurements still required better statistical precision to provide quantitative physics conclusions. Therefore, the second phase of the BES program (BES-II) with enhanced collider performance, higher statistics datasets, and upgraded detectors with better acceptance and efficiency was also carried out at RHIC. This second phase focuses on the most crucial center-of-mass energy range between 7.7 and 27 GeV in the collider mode and 3 to 7.7 GeV in the fixed target mode.
We are planning to access the high baryon density regions of the QCD phase diagram and search for the threshold of QGP formation by looking at the signatures of the QCD critical point. We are studying the transverse momentum spectra and the collective flow of identified hadrons in BES-II energies. In that direction, we have already started working on the fixed target data set from 3.2 – 7.7 GeV collected in the year 2019-2020.
Dr. Chitrasen Jena is an Associate Professor in the Department of Physics at IISER Tirupati. He completed his Ph.D. from the Institute of Physics, Bhubaneswar, HBNI, India in 2012. He was a Student Assistant at the Nuclear Science Division of Lawrence Berkeley National Laboratory, USA for two years during his Ph.D. Later he worked as a postdoctoral fellow at the National Institute of Science Education and Research (NISER) Bhubaneswar, India, and Università degli Studi di Padova and INFN Sezione di Padova, Italy. Subsequently, he joined as an Assistant Professor at IISER Tirupati in February 2017.
His research focuses broadly on the study of the Quantum chromodynamics (QCD) phase diagram, various signatures of Quark-Gluon Plasma (QGP) and understanding the particle production mechanism in high-energy nuclear collisions. Currently, he is working in the STAR Collaboration at RHIC to explore the QCD phase diagram and search for the possible QCD critical point. He has also been involved in the EPIC Collaboration at the Electron-Ion Collider (EIC) to study the internal structure and dynamics of nucleons and nuclei.
- 86 credit courses were taken in the first two years of the integrated PhD programme.
- Mechanics: PHY111 (Semester:1)
- Electricity and Magnetism: PHY211 (Semester: 3)
External Teaching assistantships:
- Wave and Optics (at Sri Venkateshwara College of Engineering, Tirupati)
- Semester project on – Resonance production in proton-proton collisions at 7 TeV using PYTHIA by Preet Bhanjan – BS-MS 2018, IISER Tirupati (Spring, 2022)
- Summer Project on – Glauber modeling in high energy nuclear collisions by Swarada Deshpande – BS-MS 2020, IISER Tirupati (May-July 2022)
- Summer Project on – Spin alignment of vector mesons by Meenakshi V – BS-MS 2020, IISER Tirupati (May-July 2022)