Search results for "Pb"

Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at √sNN = 5.02 TeV

2016

The pseudorapidity density of charged particles, dNch=dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of √sNN=5.02 TeV. For the 5% most central collisions, we measure a value of 1943±54. The rise in dNch=dη as a function of √sNN is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dNch=dη as a function of the average number of participant nucleons, hNparti, calculated in a Glauber model, is compared with the previous measurement at √sNN=2.76 TeV. A constant factor of about 1.2 describes the increase in dNch=dη from √sNN=2,76 to 5.02 TeV for all central…

Centrality dependence of the nuclear modification factor of charged pions, kaons, and protons in Pb-Pb collisions at √sNN = 2.76 TeV

2016

Transverse momentum (pT) spectra of pions, kaons, and protons up to pT = 20 GeV/c have been measured in Pb-Pb collisions at √sNN = 2.76 TeV using the ALICE detector for six different centrality classes covering 0%–80%. The proton-to-pion and the kaon-to-pion ratios both show a distinct peak at pT ≈ 3 GeV/c in central Pb-Pb collisions that decreases for more peripheral collisions. For pT > 10 GeV/c, the nuclear modification factor is found to be the same for all three particle species in each centrality interval within systematic uncertainties of 10%–20%. This suggests there is no direct interplay between the energy loss in the medium and the particle species composition in the hard core of …

One-dimensional pion, kaon, and proton femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV

2015

The size of the particle emission region in high-energy collisions can be deduced using the femtoscopic correlations of particle pairs at low relative momentum. Such correlations arise due to quantum statistics and Coulomb and strong final state interactions. In this paper, results are presented from femtoscopic analyses of π±π±, K±K±, K0 SK0 S, pp, and pp correlations from Pb-Pb collisions at √sNN = 2.76 TeV by the ALICE experiment at the LHC. One-dimensional radii of the system are extracted from correlation functions in terms of the invariant momentum difference of the pair. The comparison of the measured radii with the predictions from a hydrokinetic model is discussed. The pion and kao…

Production of inclusive Υ(1S) and Υ(2S) in p–Pb collisions at √sNN=5.02TeV

2015

Effects of Chinese youth consumer recycling behavior decisions : application of TPB theory to beverage container recycling system adoption

2016

Increasing municipal waste is a challenge that China is facing during decades, especially along with the economic growth. Although recycling is apparently an efficient method to deal with the problem, 2% of solid waste recycled in China revealed there is barrier in the path. The recycling system is developing in China by government and companies, hence understanding and predicting Chinese consumers’ acceptance of the system is necessary. This research is aim to understand the Chinese youth consumers’ recycling behavior through the view on beverage container recycling behavior. Hypothesizes in this study is proposed according to the theoretical framework of the TPB, which is attitude toward …

Jet fragmentation transverse momentum distributions in pp and p-Pb collisions at √s, √sNN = 5.02 TeV

2021

Jet fragmentation transverse momentum (jT) distributions are measured in proton-proton (pp) and proton-lead (p-Pb) collisions at √sNN = 5.02 TeV with the ALICE experiment at the LHC. Jets are reconstructed with the ALICE tracking detectors and electromagnetic calorimeter using the anti-kT algorithm with resolution parameter R = 0.4 in the pseudorapidity range |η| < 0.25. The jT values are calculated for charged particles inside a fixed cone with a radius R = 0.4 around the reconstructed jet axis. The measured jT distributions are compared with a variety of parton-shower models. Herwig and Pythia 8 based models describe the data well for the higher jT region, while they underestimate the low…

Latvijā ligzdojošo ziemeļu gulbju populācijas ģenētiksā daudzveidība

2018

Ziemeļu gulbis ir Latvijā ligzdojoša putnu suga, kas pasaulē ir sastopama plašā diapazonā lielākoties Eiropā un Eirāzijas ziemeļos. Darbā tika veikta polimorfo uz retrotranspozoniem balstītu iPBS praimeru atlase, lai noteiktu Ziemeļu gulbju ģenētisko daudzveidību. Darbā izmantoti Ziemeļu gulbju paraugi tika ievākti Kurzemes reģionā. Polimerāzes ķēdes reakcijas (PCR) produkti tika vizualizēti agarozes gēla elektroforēzē. Atlasītajam praimerim 2075 kopumā tika konstatēti 31 lokusi ar 28 polimorfiem lokusiem (90.32 %) Darbā apskatītās 22 ligzdu ģenētiskā līdzība ir augstāka par 77%. Veicot analīzi vienas ligzdas ietvaros visaugstāko polimorfo lokusu skaitu uzrādīja ligzda Nr.1 ar 16 polimorfie…

Ložņu āboliņa (Trifolium repens L.) Karpatu kalnu un Latvijas populāciju ģenētiskās daudzveidības salīdzinājums

2019

Sandra Dombrovska (2019): Ložņu āboliņa (Trifolium repens L.) Karpatu kalnu un Latvijas populāciju ģenētiskās daudzveidības salīdzinājums. Ložņu āboliņš (Trifolium repens L.) ir viens no plaši izmantotajiem lopbarības augiem visā pasaulē. Izmantots kā modeļobjekts. Bakalaura darba mērķis ir salīdzināt Karpatu kalnu savvaļas populāciju un šķirnes “Daile” materiālu daudzveidību un retrotranspozonu kustību pēc UV gaismas stresora ietekmes. Bakalaura darba izstrādes laikā tika izdalīts DNS no 117 izkaltētiem paraugiem. Tika veikta iPBS analīze, klasteru analīze, UV-B starojuma ietekmes analīze. Rezultāti liecina, ka šķirnes "Daile" populācija iedalās divās atsevišķās grupās un Slovākijas genoti…

"Table 15" of "Linear and non-linear flow modes in Pb-Pb collisions at $\sqrt{s_{\rm NN}} =$ 2.76 TeV"

2019

Centrality dependence of rho_mn in Pb–Pb collisions at 2.76 TeV.

"Table 16" of "Linear and non-linear flow modes in Pb-Pb collisions at $\sqrt{s_{\rm NN}} =$ 2.76 TeV"

2019

Centrality dependence of rho_mn in Pb–Pb collisions at 2.76 TeV.