Tarun Kanti Ghosh
A5039907497- Quantum and electron transport phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Topological Materials and Phenomena
- Physics of Superconductivity and Magnetism
- Quantum, superfluid, helium dynamics
- Strong Light-Matter Interactions
- Graphene research and applications
- Semiconductor Quantum Structures and Devices
- Ion channel regulation and function
- Cellular transport and secretion
- Electronic and Structural Properties of Oxides
- Mechanical and Optical Resonators
- Nuclear reactor physics and engineering
- Quantum Mechanics and Non-Hermitian Physics
- Protein Kinase Regulation and GTPase Signaling
- Atomic and Subatomic Physics Research
- Quantum Information and Cryptography
- Machine Learning in Bioinformatics
- Magnetic properties of thin films
- Genomics and Phylogenetic Studies
- Advancements in Semiconductor Devices and Circuit Design
- Animal Vocal Communication and Behavior
Indian Institute of Technology Kanpur
2015-2024
Centre for Development of Advanced Computing
2012-2024
Jai Prakash Vishwavidyalaya
2022
Khulna University of Engineering and Technology
2014-2021
Paktia University
2018
Heinrich Heine University Düsseldorf
2007-2008
Vanderbilt University
2001-2007
Okayama University
2006-2007
3M (United States)
2006-2007
The Abdus Salam International Centre for Theoretical Physics (ICTP)
2003-2006
Transverse momentum spectra for charged hadrons and neutral pions in the range 1 GeV/c<p(T)<5 GeV/c have been measured by PHENIX experiment at RHIC Au+Au collisions root square[s(NN)] = 130 GeV. At high p(T) from peripheral nuclear are consistent with scaling p+p average number of binary nucleon-nucleon collisions. The central significantly suppressed when compared to binary-scaled expectation, also similarly collisions, indicating a novel nuclear-medium effect energies.
The centrality dependence of transverse momentum distributions and yields for ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}},{K}^{\ifmmode\pm\else\textpm\fi{}},p$, $\overline{p}$ in $\text{Au}+\text{Au}$ collisions at $\sqrt{{s}_{NN}}=200\phantom{\rule{0.3em}{0ex}}\text{GeV}$ midrapidity are measured by the PHENIX experiment Relativistic Heavy Ion Collider. We observe a clear particle mass shapes spectra central below $\ensuremath{\sim}2\phantom{\rule{0.3em}{0ex}}\text{GeV}∕c$ ${p}_{T}$....
The anisotropy parameter (v(2)), the second harmonic of azimuthal particle distribution, has been measured with PHENIX detector in Au+Au collisions at sqrt[s(NN)]=200 GeV for identified and inclusive charged production central rapidities (|eta|<0.35) respect to reaction plane defined high (|eta|=3-4 ). We observe that v(2) mesons falls below (anti)baryons p(T)>2 GeV/c, marked contrast predictions a hydrodynamical model. A quark-coalescence model is also investigated.
Transverse momentum spectra of neutral pions in the range 1<pT<10 GeV/c have been measured at midrapidity by PHENIX experiment BNL RHIC Au+Au collisions sNN=200 GeV. The π0 multiplicity central reactions is significantly below yields same sNN peripheral and p+p scaled number nucleon-nucleon collisions. For most bin, suppression factor ∼2.5 pT=2 increases to ∼4–5 pT≈4 GeV/c. At larger pT, remains constant within errors. deficit already apparent semiperipheral smoothly with centrality.Received...
The action of inositol 1,4,5-trisphosphate (InsP3) in releasing intracellular Ca2+ is shown to be competitively and potently antagonized by the glycosaminoglycan, heparin. Using either permeabilized cells DDT1MF-2 smooth muscle cell line, or an isolated microsomal membrane fraction derived from intact cells, heparin (4-6 kDa) at 10 micrograms/ml was observed completely block InsP3 accumulated via ATP-dependent pump. In had no effect on pump activity passive fluxes contributing equilibrium...
Soluble and hydrophobic lipid breakdown products have a variety of important signaling roles in cells. Here sphingoid bases derived cells from sphingolipid are shown to potent direct effect mediating calcium release intracellular stores. Sphingosine must be enzymically converted within the cell product believed sphingosine-1-phosphate, which thereafter effects pool including inositol 1,4,5-trisphosphate-sensitive pool. The sensitivity, molecular specificity, reversibility on movements...
The PHENIX experiment has measured midrapidity ([FORMULA: SEE TEXT]) transverse momentum spectra of electrons as a function centrality in Au+Au collisions at [FORMULA: TEXT]. Contributions from photon conversions and light hadron decays, mainly Dalitz decays pi0 eta mesons, were removed. resulting nonphotonic electron are primarily due to the semileptonic hadrons carrying heavy quarks. Nuclear modification factors determined by comparison p+p collisions. A significant suppression high pT is...
Azimuthal correlations of jet-induced high-pT charged hadron pairs are studied at midrapidity in Au+Au collisions √sNN=200 GeV. The distribution jet-associated partner hadrons (1.0<pT<2.5 GeV/c) per trigger (2.5<pT<4.0 is found to vary with collision centrality, both shape and yield, indicating a significant effect the nuclear medium on jet fragmentation process.Received 1 July 2005DOI:https://doi.org/10.1103/PhysRevLett.97.052301©2006 American Physical Society
The PHENIX experiment at RHIC has measured charged hadron yields mid-rapidity over a wide range of transverse momentum (0.5 < p_T 10 GeV/c) in Au+Au collisions sqrt(s_NN)=200 GeV. data are compared to pi^zero measurements from the same experiment. For both hadrons and neutral pions, per nucleon-nucleon collision significantly suppressed central peripheral collisions. suppression sets gradually increases with increasing centrality Above 4-5 GeV/c p_T, constant almost identical pi^zeroes is...
Identified ${\ensuremath{\pi}}^{+/\ensuremath{-}}$, ${K}^{+/\ensuremath{-}}$, $p$, and $\overline{p}$ transverse momentum spectra at midrapidity in $\sqrt{{s}_{\mathrm{NN}}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}130\phantom{\rule{0ex}{0ex}}\mathrm{GeV}\phantom{\rule{0ex}{0ex}}\mathrm{Au}+\mathrm{Au}$ collisions were measured by the PHENIX experiment RHIC as a function of collision centrality. Average momenta increase with number participating nucleons similar way for all particle...
A close correlation was observed between intracellular Ca2+ pool depletion and refilling the onset of DNA synthesis proliferation DDT1MF-2 smooth muscle cells. The pump inhibitors 2,5-di-tert-butyl-hydroquinone (DBHQ) thapsigargin (TG) specifically emptied identical inositol 1,4,5-trisphosphate (InsP3)-sensitive pools both arrested cell growth at concentrations corresponding to blockade. However, an important distinction two with respect their reversibility action. Upon removal DBHQ from...
Sphingosine and sphingosine derivatives induce Ca2+ release from inositol 1,4,5-trisphosphate (InsP3)-sensitive pools in permeabilized cells (Ghosh, T. K., Bian, J., Gill, D. L. (1990) Science 248, 1653-1656). To further assess the mechanism of sphingoid base-mediated release, effects on fluxes were characterized using a microsomal membrane vesicle fraction (B3) enriched rough endoplasmic reticulum (ER) prepared DDT1MF-2 cell smooth muscle line Mullaney, J. M., Tarazi, F. I., (1989) Nature...
The first measurement of direct photons in Au + collisions at (square root)S(NN) = 200 GeV is presented. photon signal extracted as a function the collision centrality and compared to next-to-leading order perturbative quantum chromodynamics calculations. yield shown scale with number nucleon-nucleon for all centralities.
We present results for the charged-particle multiplicity distribution at midrapidity in Au-Au collisions square root of [s(NN)] = 130 GeV measured with PHENIX detector RHIC. For 5% most central we find dN(ch)/d eta(vertical line eta 0) 622+/-1(stat)+/-41(syst). The results, analyzed as a function centrality, show steady rise particle density per participating nucleon centrality.
Recent studies have identified inositol 1,4,5-tris-phosphate(InsP3)-sensitive and -insensitive Ca2+ pools a GTP-dependent mechanism that transfers between them. Here, the pump-inhibitory sesquiterpene lactone, thapsigargin, is shown to distinguish these two identify third pumping pool unresponsive InsP3 or GTP. Using saponin-permeabilized DDT1MF-2 smooth muscle cells, approximately 75% of total intracellular ATP-dependent accumulation blocked by thapsigargin with an IC50 30 nM. In contrast,...
The intracellular Ca2+ pump inhibitor, thapsigargin, added to DDT1MF-2 smooth muscle cells in culture, irreversibly inhibited accumulation of within cells, permanently emptied the inositol 1,4,5-trisphosphate (InsP3)-sensitive pool, and simultaneously induced profound alteration cell growth. After only a brief (30-min) treatment cultured with 3 microM thapsigargin followed by extensive washing, total releasable InsP3-sensitive pool remained entirely empty, even after 7 days culture without...
Inclusive transverse momentum spectra of $\ensuremath{\eta}$ mesons have been measured within ${p}_{T}=2--10\text{ }\text{ }\mathrm{GeV}/c$ at midrapidity by the PHENIX experiment in $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{NN}}=200\text{ }\mathrm{GeV}$. In central yields are significantly suppressed compared to peripheral $\mathrm{Au}+\mathrm{Au}$, $d+\mathrm{Au}$, and $p+p$ scaled corresponding number nucleon-nucleon collisions. The magnitude, centrality, ${p}_{T}$ dependence...
We present a detail theoretical study of the Drude weight and optical conductivity 8-$Pmmn$ borophene having tilted anisotropic Dirac cones. provide exact analytical expressions $xx$ $yy$ components as well maximum conductivity. also obtain minimum energy ($ε_1$) required to trigger transitions ($ε_2$) needed attain find that are highly consequence cone. The conductivities have nonmonotonic behavior with photon in regime between $ε_1$ $ε_2$, result parameter $v_t$. can be extracted by...
Bose-Einstein correlations of identically charged pion pairs were measured by the PHENIX experiment at mid-rapidity in Au+Au collisions $\sqrt{s_{\rm NN}}$ = 200 GeV. The Bertsch-Pratt radius parameters determined as a function transverse momentum pair and centrality collision. Using \it{full} Coulomb correction, ratio $R_{\rm out}/R_{\rm side}$ is smaller than unity for $<k_{\rm T}>$ from 0.25 to 1.2 GeV/c all centralities. However, using recently developed partial correction methods, we...
Transverse momentum spectra and yields of hadrons are measured by the PHENIX collaboration in $\text{Au}+\text{Au}$ collisions at $\sqrt{{s}_{NN}}=130\phantom{\rule{0.3em}{0ex}}\text{GeV}$ Relativistic Heavy Ion Collider. The time-of-flight resolution allows identification pions to transverse momenta $2\phantom{\rule{0.3em}{0ex}}\text{GeV}∕c$ protons antiprotons $4\phantom{\rule{0.3em}{0ex}}\text{GeV}∕c$. yield rises approximately linearly with number nucleons participating collision, while...
Transverse momentum spectra of electrons from Au+Au collisions at square root[s(NN)] = 130 GeV have been measured midrapidity by the PHENIX experiment Relativistic Heavy Ion Collider. The show an excess above background photon conversions and light hadron decays. electron signal is consistent with that expected semileptonic decays charm. yield dN(e)/dy for p(T) > 0.8 GeV/c 0.025+/-0.004(stat)+/-0.010(syst) in central collisions, corresponding charm cross section 380+/-60(stat)+/-200(syst)...
Two-pion correlations in square root[s(NN)] = 130 GeV Au+Au collisions at RHIC have been measured over a broad range of pair transverse momentum k(T) by the PHENIX experiment RHIC. The dependent radii are similar to results from heavy-ion 4.1, 4.9, and 17.3 GeV, whereas longitudinal radius increases monotonically with beam energy. ratio outwards sidewards (R(out)/R(side)) is consistent unity independent k(T).
The first measurement of energy produced transverse to the beam direction at Relativistic Heavy-Ion Collider Brookhaven National Laboratory is presented. midrapidity density per participating nucleon rises steadily with number participants, closely paralleling rise in charged-particle density, such that <E(T)>/<N(ch)> remains relatively constant as a function centrality. calculated via Bjorken's prescription for 2% most central Au+Au collisions square root[s(NN)] = 130 GeV least epsilon(Bj)...