12,493 research outputs found
Two-particle angular correlations in pp collisions recorded with the ALICE detector at the LHC
We report on the studies of two-particle angular correlations measured in
proton-proton collisions at a center-of-mass energy of sqrt(s) = 7 TeV recorded
by ALICE at the LHC. Two-particle correlations in relative azimuth
({\Delta}{\phi}) and pseudorapidity ({\Delta}{\eta}) are expected to exhibit
several structures which arise from different physics mechanisms and allow us
to study the wide landscape of correlations. The results include the dependence
of the correlation function on the event multiplicity, the charge combination
and species (pions, kaons or protons) of particles in the pair.Comment: Proceedings of 2nd International Conference on New Frontiers in
Physic
Kripkenstein from the mathematical point of view: a preliminary survey
This paper deals with the problem of the impact of Kripke’s skeptical
paradox on the philosophy of mathematics. By perceiving mathematics as
a huge rule-following discipline, one could argue that the Kripkean nonfactualist
thesis should be adopted within the philosophy of mathematics
en bloc to imply a refutation of objectivity and an enforcement of a
particular view on the nature of mathematics. In this paper I will discuss
this claim. According to Kripke’s skeptical solution we should reject the
notion of fact and adopt the use theory of meaning that could be stated as
follows: ’One understands the concepts embodied in a language to the
extent that one knows how to use the language correctly.’ [Shapiro
1991, 211] [Kripke 1982]. Focusing on mathematical discourse, we
should ask: what are the implications of the use theory of meaning for
the philosophy of mathematics? Furthermore, is the answer to the
skeptical paradox consistent with selected views in philosophy of
mathematics? The supposed answer to the first question is that it
demands the view that mathematics should be perceived as a strictly
pragmatic discipline and the rules of mathematical discourse are mere
conventions. But this is too simplistic a view and the matter at hand is far
more complicated.This paper is a part of a research project financed by National Centre of Science (Poland)
on the basis of the decision no. UMO-2016/20/T/HS5/00232
The Lund Model at Nonzero Impact Parameter
We extend the formulation of the longitudinal 1+1 dimensional Lund model to
nonzero impact parameter using the minimal area assumption. Complete formulae
for the string breaking probability and the momenta of the produced mesons are
derived using the string worldsheet Minkowskian helicoid geometry. For strings
stretched into the transverse dimension, we find probability distribution with
slope linear in m_T similar to the statistical models but without any
thermalization assumptions.Comment: 12 pages, 2 .eps figures, footnotes added, results unchanged, version
to be published in Phys.Lett.
AdS/CFT for the early stages of heavy ion collisions
I give a brief introduction to the AdS/CFT correspondence targeted at
heavy-ion physicists. I also review some insights to our understanding of the
early stages of heavy-ion collisions coming from selected studies made using
methods of the AdS/CFT correspondence.Comment: 8 pages, 4 figures. Plenary talk at the Quark Matter 2014 conferenc
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