1,721,039 research outputs found
Quantum black holes, partition of integers and self-similarity
No full textIn this paper, we take the view that the area of a black hole's event horizon is quantized, A = l(P)(2)(4 ln 2)N, and the associated degrees of freedom are finite in number and of fermionic nature. We then investigate general aspects of the entropy, S-BH, our main focus being black hole self-similarity. We first find a two-to-one map between the black hole's configurations and the ordered partitions of the integer N. Hence, we construct from there a composition law between the subparts making the whole configuration space. This gives meaning to black hole self-similarity, entirely within a single description, as a phenomenon stemming from the well-known self-similarity of the ordered partitions of N. Finally, we compare the above to the well-known results on the subleading (quantum) corrections, which necessarily require different (quantum) statistical weights for the various configurations
Universal strangeness production in hadronic and nuclear collisions
No full textCastorina P, Plumari S, Satz H. Universal strangeness production in hadronic and nuclear collisions. INTERNATIONAL JOURNAL OF MODERN PHYSICS. E, NUCLEAR PHYSICS. 2016;25(8): 1650058.We show that strangeness suppression in hadronic and nuclear collisions is fully determined by the initial energy density of the collision. The suppression factor gamma(s)(s), with root s denoting the collision energy, can be expressed as a universal function of the initial energy density is an element of(0)(s), and the resulting pattern is in excellent agreement with data from p-p, p-Pb, Cu-Cu, Au-Au and Pb-Pb data over a wide range of energies and for different centralities
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Thermal hadronization and hawking-unruh radiation in QCD
No full textCastorina P, Kharzeev D, Satz H. Thermal hadronization and hawking-unruh radiation in QCD. EUROPEAN PHYSICAL JOURNAL C. 2007;52(1):187-201.We conjecture that, because of color confinement, the physical vacuum forms an event horizon for quarks and gluons, which can be crossed only by quantum tunneling, i.e., through the QCD counterpart of Hawking radiation at black holes. Since such radiation cannot transmit information to the outside, it must be thermal, of a temperature determined by the chromodynamic force at the confinement surface, and it must maintain color neutrality. We explore the possibility that the resulting process provides a common mechanism for thermal hadron production in high energy interactions, from e(+)e(-) annihilation to heavy ion collisions
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