Dynamics of Hot QCD Matter -- Current Status and Developments

The discovery and characterization of hot and dense QCD matter, known as Quark Gluon Plasma (QGP), remains the most international collaborative effort and synergy between theorists and experimentalists in modern nuclear physics to date. The experimentalists around the world not only collect an unprecedented amount of data in heavy-ion collisions, at Relativistic Heavy Ion Collider (RHIC), at Brookhaven National Laboratory (BNL) in New York, USA, and the Large Hadron Collider (LHC), at CERN in Geneva, Switzerland but also analyze these data to unravel the mystery of this new phase of matter that filled a few microseconds old universe, just after the Big Bang. In the meantime, advancements in theoretical works and computing capability extend our wisdom about the hot-dense QCD matter and its dynamics through mathematical equations. The exchange of ideas between experimentalists and theoreticians is crucial for the progress of our knowledge. The motivation of this first conference named "HOT QCD Matter 2022" is to bring the community together to have a discourse on this topic. In this article, there are 36 sections discussing various topics in the field of relativistic heavy-ion collisions and related phenomena that cover a snapshot of the current experimental observations and theoretical progress. This article begins with the theoretical overview of relativistic spin-hydrodynamics in the presence of the external magnetic field, followed by the Lattice QCD results on heavy quarks in QGP, and finally, it ends with an overview of experiment results.Comment: Compilation of the contributions (148 pages) as presented in the `Hot QCD Matter 2022 conference', held from May 12 to 14, 2022, jointly organized by IIT Goa & Goa University, Goa, Indi

Production of He-4 and (4) in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC

Results on the production of He-4 and (4) nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar <1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4 = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.Peer reviewe

Recent quarkonium measurements in small systems with the ALICE detector at the LHC

ALICE has measured the quarkonium production in mid and forward rapidity in pp and p–Pb collisions. Recent nuclear modification factor measurements at mid-rapidity in p–Pb collisions at sNN=5.02TeV are shown for both prompt and non-prompt J/ ψ mesons. The status of mid-rapidity J/ ψ and forward rapidity ϒ analyses in p–Pb collisions at sNN=8.16TeV are also presented. Regarding pp collisions, recent J/ ψ cross-section measurements at s=5and13TeV performed at central and forward rapidity, including the status of the analysis for the separation between prompt and non-prompt J/ ψ components at mid-rapidity, are presented. Comparisons of the results in both pp and p–Pb collisions with the available theoretical model calculations are provided

Charmonium studies at forward rapidity with ALICE Muon Spectrometer at the LHC

The cross section of \psi(2S) production as a function of pt and rapidity in pp collisions at 5.02 TeV have been reported in the thesis. These results are crucial for understanding the QCD processes and production of the charmonia. The first measurement of pt and y differential cross sections at 5.02 TeV, are also shown. The production cross section ratio of \psi(2S) and J/\psi , has been studied to explore the energy dependence. Comparing with the published ALICE results at 7, 8 and 13 TeV, it is established that this ratio does not show any significant energy dependence. The cross section of \psi(2S) is described well by the NRQCD calculations except for higher pt bins. The NLO calculation based ICEM model, on the other hand overestimates the data at high pt. The ratio of inclusive \psi(2S)-to-J/\psi production cross sections integrated over pt and y is found to be 0.15+- 0.01 (stat.) +- 0.02 (syst.). The calculations based on NRQCD+CGC well reproduce the ratio as a function of pt and y for pt < 8 GeV/c. The trend of the over cross-section ratio as a function of pt and y is overestimated by the CEM model in the low pt region. The results on the inclusive production at the forward (p-going direction, 2.03 < y_cms < 3.53) and backward (Pb-going direction, -4.46 < y_cms < -2.96) rapidities in p-Pb collisions at 8.16 TeV, have been presented in the thesis in the form of production cross sections, the double cross-section ratios with respect to the J/\psi in p-Pb and pp, and the nuclear modification factors R_pPb. The analysis has been segmented in two parts: 1) pt and y differential cross-section measurement and 2) centrality dependence measurement. The main conclusion which has been drawn from the above observable is that the initial state effects, which are suffcient to explain suppression behavior, but cannot describe the suppression at the backward rapidity where it is found to be significantly suppressed. The final state effects are needed to describe \psi(2S) suppression. Apart from that, no significant energy dependence or pt dependence is observed in RpPb. The multi-differential and single-differential \psi(2S) cross-section measurements are described in the thesis. The analysis of J/\psi in Pb-Pb collisions at 5.02 TeV at forward rapidity has been performed to investigate the recombination scenario in heavy-ion collisions. The high statistics of 2015+2018 datasets made it possible to precisely show the effect of recombination which are visible only at low pt in the most central collisions. This effect induces a slope in the R_AA vs y plot in that particular bins, confirming the role of in-medium recombination of c\bar{c} pairs. The measurement of R_AA of \psi(2S) as a function of pt and centrality, has been presented. The \psi(2S) has been found to be more suppressed compared to J/\psi in semi-central and central collisions. It also shows a decreasing trend with increase of pt

Polysaccharides from Dolichos biflorus Linn and Trachyspermum ammi Linn seeds: isolation, characterization and remarkable antimicrobial activity

Abstract Polysaccharides are structurally complex and essential constituents of life, and therefore, studies directed to these kinds of molecules have received scientific attention. Despite an easy availability of Dolichos biflorus Linn and Trachyspermum ammi (Linn) seeds isolation, characterization and antimicrobial studies of polysaccharides derived from these two natural sources have not been investigated. Therefore, we report here isolation of polysaccharides, their purification and characterization from Dolichos biflorus Linn and Trachyspermum ammi (Linn) seeds. Gel permeation chromatography, GC–MS, SEM, XRD, EDX and FT-IR analyses show the presence of three pentose sugar such as d-ribose, d-arabinose, d-xylose and hexose sugar such as d-mannose, d-galactose and d-glucose. Unprecedented antimicrobial activity of these polysaccharides against Gram positive bacteria such as Staphylococcus aureus and Bacillus subtilis and Gram negative bacteria such as Escherichia coli and Pseudomonas aeruginosa are established