| 1. |
- Abelev, Betty, et al.
(författare)
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Long-range angular correlations on the near and away side in p-Pb collisions at root S-NN=5.02 TeV
- 2013
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Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 719:1-3, s. 29-41
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Tidskriftsartikel (refereegranskat)abstract
- Angular correlations between charged trigger and associated particles are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV for transverse momentum ranges within 0.5 < P-T,P-assoc < P-T,P-trig < 4 GeV/c. The correlations are measured over two units of pseudorapidity and full azimuthal angle in different intervals of event multiplicity, and expressed as associated yield per trigger particle. Two long-range ridge-like structures, one on the near side and one on the away side, are observed when the per-trigger yield obtained in low-multiplicity events is subtracted from the one in high-multiplicity events. The excess on the near-side is qualitatively similar to that recently reported by the CMS Collaboration, while the excess on the away-side is reported for the first time. The two-ridge structure projected onto azimuthal angle is quantified with the second and third Fourier coefficients as well as by near-side and away-side yields and widths. The yields on the near side and on the away side are equal within the uncertainties for all studied event multiplicity and p(T) bins, and the widths show no significant evolution with event multiplicity or p(T). These findings suggest that the near-side ridge is accompanied by an essentially identical away-side ridge. (c) 2013 CERN. Published by Elsevier B.V. All rights reserved.
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| 2. |
- Abelev, Betty, et al.
(författare)
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Measurement of prompt J/psi and beauty hadron production cross sections at mid-rapidity in pp collisions at root s=7 TeV
- 2012
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Ingår i: Journal of High Energy Physics. - 1029-8479. ; :11
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Tidskriftsartikel (refereegranskat)abstract
- The ALICE experiment at the LHC has studied J/psi production at mid-rapidity in pp collisions at root s = 7 TeV through its electron pair decay on a data sample corresponding to an integrated luminosity L-int = 5.6 nb(-1). The fraction of J/psi from the decay of long-lived beauty hadrons was determined for J/psi candidates with transverse momentum p(t) > 1,3 GeV/c and rapidity vertical bar y vertical bar < 0.9. The cross section for prompt J/psi mesons, i.e. directly produced J/psi and prompt decays of heavier charmonium states such as the psi(2S) and chi(c) resonances, is sigma(prompt J/psi) (p(t) > 1.3 GeV/c, vertical bar y vertical bar < 0.9) = 8.3 +/- 0.8(stat.) +/- 1.1 (syst.)(-1.4)(+1.5) (syst. pol.) mu b. The cross section for the production of b-hadrons decaying to J/psi with p(t) > 1.3 GeV/c and vertical bar y vertical bar < 0.9 is a sigma(J/psi <- hB) (p(t) > 1.3 GeV/c, vertical bar y vertical bar < 0.9) = 1.46 +/- 0.38 (stat.)(-0.32)(+0.26) (syst.) mu b. The results are compared to QCD model predictions. The shape of the p(t) and y distributions of b-quarks predicted by perturbative QCD model calculations are used to extrapolate the measured cross section to derive the b (b) over bar pair total cross section and d sigma/dy at mid-rapidity.
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| 3. |
- Abelev, Betty, et al.
(författare)
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Underlying Event measurements in pp collisions at root s=0.9 and 7 TeV with the ALICE experiment at the LHC
- 2012
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Ingår i: Journal of High Energy Physics. - 1029-8479. ; :7
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Tidskriftsartikel (refereegranskat)abstract
- We present measurements of Underlying Event observables in pp collisions at root s = 0 : 9 and 7 TeV. The analysis is performed as a function of the highest charged-particle transverse momentum p(T),L-T in the event. Different regions are defined with respect to the azimuthal direction of the leading (highest transverse momentum) track: Toward, Transverse and Away. The Toward and Away regions collect the fragmentation products of the hardest partonic interaction. The Transverse region is expected to be most sensitive to the Underlying Event activity. The study is performed with charged particles above three different p(T) thresholds: 0.15, 0.5 and 1.0 GeV/c. In the Transverse region we observe an increase in the multiplicity of a factor 2-3 between the lower and higher collision energies, depending on the track p(T) threshold considered. Data are compared to PYTHIA 6.4, PYTHIA 8.1 and PHOJET. On average, all models considered underestimate the multiplicity and summed p(T) in the Transverse region by about 10-30%.
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| 4. |
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| 5. |
- Andersson, Joakim, 1974-
(författare)
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Skilda världar : Samtida föreställningar om kulturarvsplatser
- 2008
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Kulturarvsplatser kan betraktas på olika sätt av olika människor. Samtidigt finns kol-lektiva föreställningar om hur en kulturarvsplats bör förstås. Mellan dessa utgångs-punkter sker förhandlingar om kulturarvsplatsens betydelse och värde. Syftet med studien är att förstå hur en plats, institutionellt utpekad som kulturarv, används och iscensätts genom mångsidiga och korsande praktiker, både via media och på plats.Två fall undersöks som har olika inriktningar men båda inom svensk kulturmiljö-vård: kulturreservatet komministerbostället Råshult i sydvästra Kronoberg i Småland som är botanikern Carl von Linnés födelseplats och den publika uppdragsarkeologiska verksamheten i Slättbygdsprojektet i västra Östergötland. Frågorna berör vilka arenor medieringen sker, dess tematik/innehåll, iscensättningen av kulturarvet samt hur besö-karna uppfattar sitt besök av platsen och de strategiska aktörernas visioner för platsen. Metodiskt följs en tänkt besökares väg till kulturarvsplatsen och faktiska besökare vid platsen.Både i slättbygdens undersökningsrum och vid Linnés Råshult synliggörs den kollektiva föreställningarna som huvudsakligen en vetenskaplig studieplats och en skattkammare för särskilt värdefulla ting. Besökarna lyfter dock fram de sociala aspekterna av besöket. Besökarens tolkning existerar och konkurrerar med andra bilder av platserna. Det saknas dock arenor som synliggör och sätter dessa i förbindelse med de strategiska aktörerna, trots mycket offentligt tal om demokratisering av kulturarvs-processerna under senare år. Olika materials bilder har på så sätt lagts jämte varandra för att synliggöra dynamik, förhandling, konkurrens och bristande dialog kring en plats.
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| 6. |
- Aronsson, Annika, et al.
(författare)
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Antas på sämre meriter?
- 2014
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Ingår i: Uppsala Nya Tidning. - 1104-0173.
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 7. |
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| 8. |
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| 9. |
- Aronsson, Gunnar, et al.
(författare)
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Healthy Work: Ideal and Reality among Public and Private Employed Academics in Sweden
- 1999
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Ingår i: Public personnel management. - 0091-0260 .- 1945-7421. ; 28:2, s. 197-215
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Tidskriftsartikel (refereegranskat)abstract
- In what does healthy work for persons with an academic background consist, and how great is the perceived gulf between actual work and healthy work? A random sample of 5,700 members of the Swedish Confederation of Professional Associations (SACO) was taken in order to investigate their images of healthy work (in a very broad sense). Two groupings of work aspects emerged as particularly important. The first can be designated as work intellectuality-that work provides intellectual stimulation and is performed freely and independently, that innovative thinking and initiative-taking are appreciated, and that personal qualities can be utilized constructively. Great discrepancies between ideal and reality were evident in the latter two aspects. The second significant set of aspects was the value of work- benefit of the work to society and the extent to which it accorded with personal values. Here, the correspondence between ideal and actual work was relatively high. Lowest ranked of the twelve aspects which were judged to constitute healthy work were being well paid and having opportunities for career advancement. Rank orders and discrepancies are analyzed for seven occupational groups: physicians, dentists, teachers, engineers, university teachers, lawyers and economists. Comparisons are made by gender, age, employer, and position.
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| 10. |
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