Search results for "ZN"
showing 10 items of 2022 documents
Calibration of the photon spectrometer PHOS of the ALICE experiment
2019
Journal of Instrumentation 14(05), P05025 - P05025 (2019). doi:10.1088/1748-0221/14/05/P05025
Charged jet cross section and fragmentation in proton-proton collisions at √s = 7 TeV
2019
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. We report the differential charged jet cross section and jet fragmentation distributions measured with the ALICE detector in proton-proton collisions at a center-of-mass energy √s=7 TeV. Jets with pseudorapidity |η|40 GeV/c, the pythia calculations also agree with the measured charged jet cross section. pythia6 simulations describe the fragmentation distributions to 15%. Larger discrepancies are observed for pythia8. SCOAP
Study of cosmic ray events with high muon multiplicity using the ALICE detector at the CERN Large Hadron Collider
2016
ALICE is one of four large experiments at the CERN Large Hadron Collider near Geneva, specially designed to study particle production in ultra-relativistic heavy-ion collisions. Located 52 meters underground with 28 meters of overburden rock, it has also been used to detect muons produced by cosmic ray interactions in the upper atmosphere. In this paper, we present the multiplicity distribution of these atmospheric muons and its comparison with Monte Carlo simulations. This analysis exploits the large size and excellent tracking capability of the ALICE Time Projection Chamber. A special emphasis is given to the study of high multiplicity events containing more than 100 reconstructed muons a…
Scattering Studies with Low-Energy Kaon-Proton Femtoscopy in Proton-Proton Collisions at the LHC
2020
The study of the strength and behaviour of the antikaon-nucleon ($\mathrm{\overline{K}N}$) interaction constitutes one of the key focuses of the strangeness sector in low-energy Quantum Chromodynamics (QCD). In this letter a unique high-precision measurement of the strong interaction between kaons and protons, close and above the kinematic threshold, is presented. The femtoscopic measurements of the correlation function at low pair-frame relative momentum of (K$^+$ p $\oplus$ K$^-$ $\overline{\mathrm{p}}$) and (K$^-$ p $\oplus$ K$^+$ $\overline{\mathrm{p}}$) pairs measured in pp collisions at $\sqrt{s}$ = 5, 7 and 13 TeV are reported. A structure observed around a relative momentum of 58 Me…
Measurement of spin-orbital angular momentum interactions in relativistic heavy-ion collisions
2020
The first evidence of spin alignment of vector mesons ($K^{*0}$ and $\phi$) in heavy-ion collisions at the Large Hadron Collider (LHC) is reported. The spin density matrix element $\rho_{00}$ is measured at midrapidity ($|y| <$ 0.5) in Pb-Pb collisions at a center-of-mass energy ($\sqrt{s_{\rm NN}}$) of 2.76 TeV with the ALICE detector. $\rho_{00}$ values are found to be less than 1/3 (1/3 implies no spin alignment) at low transverse momentum ($p_{\rm T} <$ 2 GeV/$c$) for $K^{*0}$ and $\phi$ at a level of 3$\sigma$ and 2$\sigma$, respectively. No significant spin alignment is observed for the $K^0_S$ meson (spin = 0) in Pb-Pb collisions and for the vector mesons in $pp$ collisions. The meas…
Probing the Effects of Strong Electromagnetic Fields with Charge-Dependent Directed Flow in Pb-Pb Collisions at the LHC
2020
The first measurement at the LHC of charge-dependent directed flow ($v_{1}$) relative to the spectator plane is presented for Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. Results are reported for charged hadrons and $\rm D^{0}$ mesons for the transverse momentum intervals $p_{\rm T}>0.2$ GeV/$c$ and $3<p_{\rm T}<$ 6 GeV/$c$ in the 5-40% and 10-40% centrality classes, respectively. The difference between the positively and negatively charged hadron $v_{1}$ has a positive slope as a function of pseudorapidity $\eta$, ${\rm d}\Delta{v_1}/{\rm d}\eta=$[1.68 $\pm$ 0.49 (stat.) $\pm$ 0.41 (syst.)] $\times 10^{-4}$. The same measurement for $\rm D^{0}$ and $\rm\bar{D}{}^0$ mesons yields a p…
Photoluminescent zinc oxide nanorods – a new tool for detection of human leukemic cells
2018
Aznar Traval, A.: Economía colaborativa, alojamiento y transporte, Thomson Reuters, Navarra, 2018.
2021
AMZ virsotnes tuvumā esošo pulsējošo zvaigžņu augstas izšķirtspējas spektroskopija
2019
Darbā veikta augstas izšķirtspējas spektra modelēšana trim AMZ virsotnes tuvumā esošām zvaigznēm ar mērķi precizēt atmosfēras parametrus un ķīmisko sastāvu, kā arī aprēķināt raksturlielumu izmaiņas pulsāciju gaitā. Konstatēts, ka IRAS 22272+5435 efektīvā temperatūra pulsāciju laikā mainās 650 K diapazonā, bet brīvās krišanas paātrinājums par 0.2 dex, kas liecina par zvaigznes rādiusa izmaiņām ar kārtu 14.5 R☉. IRAS 07057-1150 efektīvā temperatūra mainās vismaz 300 K diapazonā. Pirmo reizi aprēķināta deviņu ķīmisko elementu (Na, V, Mg, Ce, Se, Sr, Er, Tm, Lu) koncentrācija IRAS Z02229+6208 un IRAS 22272+5435 atmosfērās.
Nanoporainu anodēta alumīnija oksīdu saturošu vairākslāņu optisko pārklājumu sintēze un raksturošana
2021
Nanoporainu anodēta alumīnija oksīdu saturošu vairākslāņu optisko pārklājumu sintēze un raksturošana. Dutovs A., zinātniskie vadītāji prof. Dr. Chem., prof. Erts D. un vadošais pētnieks doc. Dr. Phys. Prikulis J. Konsultanti vadošais pētnieks Dr. Chem. Popļausks R. un pētnieks M.Sc. Biol. Maļinovskis U. Maģistra darbs, 49 lappuses, 21 attēls, 3 tabulas, 56 literatūras avoti. Latviešu valodā. Porains anodēts alumīnija oksīds ir optiski aktīva viela, uz kura pamatnes ir iespējams iegūt dažādus nanostrukturētus materiālus. Cinka oksīds, pateicoties savām izteiktajām fotoluminiscentām īpašībām, ir plaši pētīts pusvadītājs sensoru substrātu veidošanai. Cēlmetālu nanodaļiņu pārklāšana ar grafēnu …