University of Los Andes

About: University of Los Andes is a education organization based out in Bogotá, Colombia. It is known for research contribution in the topics: Population & Large Hadron Collider. The organization has 17616 authors who have published 25555 publications receiving 413463 citations.

Suppression and azimuthal anisotropy of prompt and nonprompt J/ψ production in PbPb collisions at √sNN = 2.76 TeV

Abstract: The nuclear modification factor [Formula: see text] and the azimuthal anisotropy coefficient [Formula: see text] of prompt and nonprompt (i.e. those from decays of b hadrons) [Formula: see text] mesons, measured from PbPb and pp collisions at [Formula: see text] [Formula: see text] at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta [Formula: see text] [Formula: see text] and rapidity [Formula: see text], extending down to [Formula: see text] [Formula: see text] in the [Formula: see text] range. The [Formula: see text] of prompt [Formula: see text] is found to be nonzero, but with no strong dependence on centrality, rapidity, or [Formula: see text] over the full kinematic range studied. The measured [Formula: see text] of nonprompt [Formula: see text] is consistent with zero. The [Formula: see text] of prompt [Formula: see text] exhibits a suppression that increases from peripheral to central collisions but does not vary strongly as a function of either y or [Formula: see text] in the fiducial range. The nonprompt [Formula: see text] [Formula: see text] shows a suppression which becomes stronger as rapidity or [Formula: see text] increases. The [Formula: see text] and [Formula: see text] of open and hidden charm, and of open charm and beauty, are compared.

Transaction utility effects when quality is uncertain

Abstract: The existing literature finds that price discrepancy, which represents the difference between expected and observed price, helps explain brand choice and purchase intention. This effect is often attributed to transaction utility, that is, the incremental utility associated with the surprise of observing a price lower or higher than expected. This research considers the possibility, however, that transaction utility is a less important determinant of choice when quality is uncertain. We propose and find that acquisition utility (perceived value for the money) tends to dominate the explanation of purchase intention, but transaction utility is significant only when consumers are more certain about quality. Our discussion considers the relative role of transaction utility in explaining consumer decision making and how the informative and allocative roles of price might be distinguished.