P. Bhattacharya
A5019733184- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Nuclear Physics and Applications
- Dark Matter and Cosmic Phenomena
- Nuclear reactor physics and engineering
- CCD and CMOS Imaging Sensors
- Plasma Diagnostics and Applications
- Renewable energy and sustainable power systems
- Atomic and Subatomic Physics Research
- Building energy efficiency and sustainability
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Atomic and Molecular Physics
- Astrophysics and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Gas Dynamics and Kinetic Theory
- Neutrino Physics Research
- Gas Sensing Nanomaterials and Sensors
- Nuclear Materials and Properties
- Calibration and Measurement Techniques
- Magnetic Field Sensors Techniques
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari
2020-2023
Adamas University
2022-2023
A. Alikhanyan National Laboratory
2021-2022
University of Cagliari
2020-2022
Saha Institute of Nuclear Physics
2010-2022
University of Calcutta
1948-2022
Weizmann Institute of Science
2016-2022
Technical University of Munich
2021
Istituto Nazionale di Fisica Nucleare
2021
National Institute of Science Education and Research
2015-2018
Recent pT-integrated cross-section measurements of the ground-state charm mesons and baryons, D0, D+, Ds+, Λc+, Ξc0, are used to evaluate fragmentation fractions production cross section per unit rapidity at midrapidity (|y|<0.5), in pp collisions s=5.02 TeV LHC. The latter is dσcc¯/dy||y|<0.5=1165±44(stat)−101+134(syst) μb. These were obtained for first time hadronic LHC, including baryon states, recently measured by ALICE midrapidity. differ significantly from values e+e− ep collisions,...
The prompt production of the charm baryon Λ_{c}^{+} and Λ_{c}^{+}/D^{0} ratios were measured at midrapidity with ALICE detector in pp p-Pb collisions sqrt[s_{NN}]=5.02 TeV. These new measurements show a clear decrease ratio increasing transverse momentum (p_{T}) both collision systems range 2<p_{T}<12 GeV/c, exhibiting similarities light-flavor baryon-to-meson p/π Λ/K_{S}^{0}. At low p_{T}, predictions that include additional color-reconnection mechanisms beyond leading-color approximation,...
A bstract The production of prompt D 0 , + and *+ mesons was measured at midrapidity (| y | < 0.5) in Pb–Pb collisions the centre-of-mass energy per nucleon–nucleon pair $$ \sqrt{s_{\mathrm{NN}}} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> </mml:math> = 5 . 02 TeV with ALICE detector LHC. were reconstructed via their hadronic decay channels yields central (0–10%) semicentral (30–50%)...
Abstract In particle collider experiments, elementary interactions with large momentum transfer produce quarks and gluons (known as partons) whose evolution is governed by the strong force, described theory of quantum chromodynamics (QCD) 1 . These partons subsequently emit further in a process that can be parton shower 2 , which culminates formation detectable hadrons. Studying pattern one key experimental tools for testing QCD. This expected to depend on mass initiating parton, through...
The p_{T}-differential production cross sections of prompt D^{0}, Λ_{c}^{+}, and Σ_{c}^{0,++}(2455) charmed hadrons are measured at midrapidity (|y|<0.5) in pp collisions sqrt[s]=13 TeV. This is the first measurement Σ_{c}^{0,++} hadronic collisions. Assuming same yield for three Σ_{c}^{0,+,++} isospin states, baryon-to-meson section ratios Σ_{c}^{0,+,++}/D^{0} Λ_{c}^{+}/D^{0} calculated transverse momentum (p_{T}) intervals 2<p_{T}<12 1<p_{T}<24 GeV/c. Values significantly larger than...
The interaction of $\Lambda$ and $\Sigma$ hyperons (Y) with nucleons (N) is strongly influenced by the coupled-channel dynamics. Due to small mass difference $\rm N \Lambda$ \Sigma$ systems, sizeable coupling strength \Sigma\leftrightarrow processes constitutes a crucial element in determination N$\Lambda$ interaction. In this letter we present most precise measurements on p$\Lambda$ pairs, from zero relative momentum up opening channel. correlation function space for...
The production yield and angular anisotropy of prompt ${D_s^+}$ mesons were measured as a function transverse momentum ($p_{ T}$) in Pb-Pb collisions at centre-of-mass energy per nucleon pair $\sqrt{s_{ NN}} = 5.02$ TeV collected with the ALICE detector LHC. their charge conjugates reconstructed midrapidity ($|y|<0.5$) from hadronic decay channel ${D_s^+ \to \phi \pi^+}$, ${\phi K^-K^+}$, $p_{ T}$ intervals $2<p_{ T}<50$ GeV/$c$ T}<36$ for 0-10% 30-50% centrality intervals. For T}>10$...
The production of prompt Λc+ baryons at midrapidity (|y|<0.5) was measured in central (0–10%) and mid-central (30–50%) Pb–Pb collisions the center-of-mass energy per nucleon–nucleon pair sNN=5.02 TeV with ALICE detector. results are more precise, differential centrality, reach much lower transverse momentum (pT=1 GeV/c) respect to previous measurements performed by ALICE, STAR, CMS Collaborations nucleus–nucleus collisions, allowing for an extrapolation down pT=0. pT-differential Λc+/D0...
The ILD detector is proposed for an electron-positron collider with collision centre-of-mass energies from 90~\GeV~to about 1~\TeV. It has been developed over the last 10 years by international team of scientists goal to design and eventually propose a fully integrated detector, primarily International Linear Collider, ILC. In this report fundamental ideas concepts behind are discussed technologies needed realisation reviewed. document starts short review science goals ILC, how can be...
The coherent photoproduction of $\rm{J/ψ}$ and $\rm{ψ'}$ mesons was measured in ultra-peripheral Pb-Pb collisions at a center-of-mass energy $\sqrt{s_{\mathrm{NN}}}~=~5.02$ TeV with the ALICE detector. Charmonia are detected central rapidity region for events where hadronic interactions strongly suppressed. is reconstructed using dilepton ($l^{+} l^{-}$) proton-antiproton decay channels, while $\rm{ψ'}$, $l^{+} l^{-} π^{+} π^{-}$ channels studied. analysis based on an event sample...
The first measurement of the cross section for coherent J/$\psi$ photoproduction as a function $|t|$, square momentum transferred between incoming and outgoing target nucleus, is presented. data were measured with ALICE detector in ultra-peripheral Pb-Pb collisions at centre-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}} = 5.02$ TeV produced central rapidity region $|y|<0.8$, which corresponds to small Bjorken-$x$ range $(0.3-1.4) \times 10^{-3}$. $|t|$-dependence not described by...
The polarization of the Λ and Λ[over ¯] hyperons along beam (z) direction, P_{z}, has been measured in Pb-Pb collisions at sqrt[s_{NN}]=5.02 TeV recorded with ALICE Large Hadron Collider (LHC). main contribution to P_{z} comes from elliptic flow-induced vorticity can be characterized by second Fourier sine coefficient P_{z,s2}=⟨P_{z}sin(2φ-2Ψ_{2})⟩, where φ is hyperon azimuthal emission angle Ψ_{2} flow plane angle. We report measurement P_{z,s2} for different collision centralities 30%-50%...
The p_{T}-differential cross sections of prompt charm-strange baryons Ξ_{c}^{0} and Ξ_{c}^{+} were measured at midrapidity (|y|<0.5) in proton-proton (pp) collisions a center-of-mass energy sqrt[s]=13 TeV with the ALICE detector LHC. baryon was reconstructed via both semileptonic decay (Ξ^{-}e^{+}ν_{e}) hadronic (Ξ^{-}π^{+}) channels. (Ξ^{-}π^{+}π^{+}) channel. branching-fraction ratio BR(Ξ_{c}^{0}→Ξ^{-}e^{+}ν_{e})/BR(Ξ_{c}^{0}→Ξ^{-}π^{+})=1.38±0.14(stat)±0.22(syst) total uncertainty reduced...
Annihilation dynamics plays a fundamental role in the baryon–antibaryon interaction (B–B‾) at low-energy and its strength range are crucial assessment of possible baryonic bound states. Experimental data on annihilation cross sections available for p–p‾ system but not low relative momentum region. Data regarding B–B‾ with strange degrees freedom extremely scarce, hence modeling contributions is mainly based nucleon–antinucleon (N–N‾) results, when available. In this letter we present...
Abstract In our Galaxy, light antinuclei composed of antiprotons and antineutrons can be produced through high-energy cosmic-ray collisions with the interstellar medium or could also originate from annihilation dark-matter particles that have not yet been discovered. On Earth, only way to produce study high precision is create them at particle accelerators. Although properties elementary antiparticles studied in detail, knowledge interaction matter limited. We determine disappearance...
Neutral pion (π0) and η meson production cross sections were measured up to unprecedentedly high transverse momenta (pT) in p–Pb collisions at sNN=8.16TeV. The mesons reconstructed via their two-photon decay channel the rapidity interval −1.3<y<0.3 ranges of 0.4<pT<200 GeV/c 1.0<pT<50 GeV/c, respectively. respective nuclear modification factor (RpPb) is presented for pT 200 30 where former was achieved by extending π0 measurement pp s=8TeV using merged cluster technique. values RpPb are...
Abstract This article reports on the inclusive production cross section of several quarkonium states, $$\textrm{J}/\psi $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mtext>J</mml:mtext> <mml:mo>/</mml:mo> <mml:mi>ψ</mml:mi> </mml:mrow> </mml:math> , $$\psi \mathrm{(2S)}$$ <mml:mo>(</mml:mo> <mml:mn>2</mml:mn> <mml:mi>S</mml:mi> <mml:mo>)</mml:mo> $$\Upsilon \mathrm (1S)$$ <mml:mi>Υ</mml:mi> <mml:mn>1</mml:mn> and \mathrm{(3S)}$$ <mml:mn>3</mml:mn> measured with...
A bstract The transverse momentum ( p T ) differential cross section of the charm-strange baryon $$ {\Xi}_{\mathrm{c}}^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> is measured at midrapidity (| y | < 0.5) via its semileptonic decay into e + Ξ − ν in pp collisions \sqrt{s} <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> = 5 . 02 TeV with ALICE detector LHC. ratio -differential...
The production of ϒ mesons in Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV is measured with the muon spectrometer ALICE detector LHC. yields as well nuclear modification factors are determined forward rapidity region 2.5<y<4.0, function rapidity, transverse momentum and collision centrality. results show that ϒ(1S) meson suppressed by factor about three respect to proton–proton collisions. For first time, significant signal for ϒ(2S) observed indicating...
The study of nuclei and antinuclei production has proven to be a powerful tool investigate the formation mechanism loosely bound states in high-energy hadronic collisions. first measurement _{Λ}^{3}H p-Pb collisions at sqrt[s_{NN}]=5.02 TeV is presented this Letter. Its yield measured rapidity interval -1<y<0 for 40% highest-multiplicity dN/dy=[6.3±1.8(stat)±1.2(syst)]×10^{-7}. compared with expectations statistical hadronization coalescence models, which describe nucleosynthesis These two...
The production of ${K}^{*}{(892)}^{0}$ and $\ensuremath{\phi}(1020)$ mesons in proton--proton $(pp)$ lead--lead (Pb--Pb) collisions at $\sqrt{{s}_{NN}}$ $=$ 5.02 TeV has been measured using the ALICE detector Large Hadron Collider (LHC). transverse momentum $({p}_{\mathrm{T}})$ distributions have midrapidity $(|y|<0.5)$ up to ${p}_{\mathrm{T}}\phantom{\rule{4pt}{0ex}}=$ 20 $\mathrm{GeV}/c$ inelastic $pp$ for several Pb--Pb collision centralities. centrality energy dependence average momenta...
A bstract The jet angularities are a class of substructure observables which characterize the angular and momentum distribution particles within jets. These sensitive to scales ranging from perturbative hard scatterings nonperturbative fragmentation into final-state hadrons. We report measurements several groomed ungroomed in pp collisions at $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 5 . 02 TeV with ALICE...
Understanding the production mechanism of light (anti)nuclei is one key challenges nuclear physics and has important consequences for astrophysics, since it provides an input indirect dark-matter searches in space. In this paper, latest results about pp collisions at $\sqrt{s} = 13$ TeV are presented, focusing on comparison with predictions coalescence thermal models. For first time, parameters $B_2$ deuterons $B_3$ helions compared parameter-free theoretical that directly constrained by...
Abstract Muography [1] utilizes cosmic muon interactions to image and analyze material properties. Electromagnetic cause trajectories deviate [2] (or even absorbed [1]), with the magnitude of deviation (absorption) reflecting material's characteristics. These modifications in muons can be utilized generate images a target object their path infer its composition geometry. Position-sensitive detectors, such as various gaseous ionization solid-state emulsion-based detectors are typically used...