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  1. Article ; Online: Area covered by disks in small-bounded continuum percolating systems: An application to the string percolation model.

    Ramírez, J E / Pajares, C

    Physical review. E

    2019  Volume 100, Issue 2-1, Page(s) 22123

    Abstract: In string percolation model, the study of colliding systems at high energies is based on a continuum percolation theory in two dimensions, where the number of strings distributed in the surface of interest is strongly determined by the size and energy of ...

    Abstract In string percolation model, the study of colliding systems at high energies is based on a continuum percolation theory in two dimensions, where the number of strings distributed in the surface of interest is strongly determined by the size and energy of the colliding particles. It is also expected that the surface where the disks are lying be finite, defining a system without periodic boundary conditions. In this work, we report modifications to the fraction of the area covered by disks in continuum percolating systems due to a finite number of disks and bounded by different geometries: circle, ellipse, triangle, square, and pentagon, which correspond to the first Fourier modes of the shape fluctuation of the initial state after the particle collision. We find that the deviation of the fraction of area covered by disks from its corresponding value in the thermodynamic limit satisfies a universal behavior, where the free parameters depend on the density profile, number of disks, and shape of the boundary. Consequently, it is also found that the color suppression factor of the string percolation model is modified by a damping function related to the small-bounded effects. Corrections to the temperature and the speed of sound defined in string systems are also shown for small and elliptically bounded systems.
    Language English
    Publishing date 2019-09-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844562-4
    ISSN 2470-0053 ; 2470-0045
    ISSN (online) 2470-0053
    ISSN 2470-0045
    DOI 10.1103/PhysRevE.100.022123
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  2. Article ; Online: Site-bond percolation solution to preventing the propagation of Phytophthora zoospores on plantations.

    Ramírez, J E / Pajares, C / Martínez, M I / Rodríguez Fernández, R / Molina-Gayosso, E / Lozada-Lechuga, J / Fernández Téllez, A

    Physical review. E

    2020  Volume 101, Issue 3-1, Page(s) 32301

    Abstract: We propose a strategy based on the site-bond percolation to minimize the propagation of Phytophthora zoospores on plantations, consisting in introducing physical barriers between neighboring plants. Two clustering processes are distinguished: (i) one of ... ...

    Abstract We propose a strategy based on the site-bond percolation to minimize the propagation of Phytophthora zoospores on plantations, consisting in introducing physical barriers between neighboring plants. Two clustering processes are distinguished: (i) one of cells with the presence of the pathogen, detected on soil analysis, and (ii) that of diseased plants, revealed from a visual inspection of the plantation. The former is well described by the standard site-bond percolation. In the latter, the percolation threshold is fitted by a Tsallis distribution when no barriers are introduced. We provide, for both cases, the formulas for the minimal barrier density to prevent the emergence of the spanning cluster. Though this work is focused on a specific pathogen, the model presented here can also be applied to prevent the spreading of other pathogens that disseminate, by other means, from one plant to the neighboring ones. Finally, the application of this strategy to three types of commercially important Mexican chili plants is also shown.
    Language English
    Publishing date 2020-04-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844562-4
    ISSN 2470-0053 ; 2470-0045
    ISSN (online) 2470-0053
    ISSN 2470-0045
    DOI 10.1103/PhysRevE.101.032301
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  3. Article ; Online: Universal geometrical scaling of the elliptic flow

    Andrés C. / Dias de Deus J. / Moscoso A. / Pajares C. / Salgado Carlos A.

    EPJ Web of Conferences, Vol 90, p

    2015  Volume 08003

    Abstract: The presence of scaling variables in experimental observables provide very valuable indications of the dynamics underlying a given physical process. In the last years, the search for geometric scaling, that is the presence of a scaling variable which ... ...

    Abstract The presence of scaling variables in experimental observables provide very valuable indications of the dynamics underlying a given physical process. In the last years, the search for geometric scaling, that is the presence of a scaling variable which encodes all geometrical information of the collision as well as other external quantities as the total energy, has been very active. This is motivated, in part, for being one of the genuine predictions of the Color Glass Condensate formalism for saturation of partonic densities. Here we extend these previous findings to the case of experimental data on elliptic flow. We find an excellent scaling for all centralities and energies, from RHIC to LHC, with a simple generalization of the scaling previously found for other observables and systems. Interestingly, the case of the photons, difficult to reconcile in most formalisms, nicely fit the scaling curve. We discuss on the possible interpretations of this finding in terms of initial or final state effects.
    Keywords Science ; Q ; Physics ; QC1-999
    Language English
    Publishing date 2015-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
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  4. Article ; Online: Transverse momentum distributions and their forward-backward correlations in the percolating color string approach

    Braun / Pajares

    Physical review letters

    2000  Volume 85, Issue 23, Page(s) 4864–4867

    Abstract: The forward-backward correlations in the p(T) distributions at midrapidity, which present a clear signature of nonlinear effects in particle production, are studied in the model of percolating color strings. Quantitative predictions are given for these ... ...

    Abstract The forward-backward correlations in the p(T) distributions at midrapidity, which present a clear signature of nonlinear effects in particle production, are studied in the model of percolating color strings. Quantitative predictions are given for these correlations at SPS, RHIC, and LHC energies. Interaction of strings also naturally explains the flattening of p(T) distributions and increase of <p(T)> with energy and atomic number for nuclear collisions.
    Language English
    Publishing date 2000-12-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.85.4864
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  5. Article: Consequences of parton saturation and string percolation on the development of cosmic ray showers.

    Pajares, C / Sousa, D / Vázquez, R A

    Physical review letters

    2001  Volume 86, Issue 9, Page(s) 1674–1677

    Abstract: At high gluon or string densities, gluon saturation or the strong interaction among strings, either forming color ropes or giving rise to string percolation, induces a strong suppression in the particle multiplicities produced at high energy. This ... ...

    Abstract At high gluon or string densities, gluon saturation or the strong interaction among strings, either forming color ropes or giving rise to string percolation, induces a strong suppression in the particle multiplicities produced at high energy. This suppression implies important modifications on cosmic ray shower development. In particular, it is shown that it affects the depth of maximum, the elongation rate, and the behavior of the number of muons at energies about 10(17)--10(18) eV. The existing cosmic ray data point out in the same direction.
    Language English
    Publishing date 2001-02-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.86.1674
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  6. Book ; Online: Fluctuations and Transverse Momentum Distributions in the Color Clustering Approach

    Cunqueiro, L. / de Deus, J. Dias / Ferreiro, E. G. / Pajares, C.

    2008  

    Abstract: We present our results on transverse momentum fluctuations, multiplicity fluctuations and transverse momentum distributions for baryons and mesons in the framework of the clustering of color sources. We determine under what conditions the initial state ... ...

    Abstract We present our results on transverse momentum fluctuations, multiplicity fluctuations and transverse momentum distributions for baryons and mesons in the framework of the clustering of color sources. We determine under what conditions the initial state configurations can lead to color connection, and more specifically, if variations of the initial state can lead to a transition from disconnected to connected color clusters, modifying the number of effective sources. We find that beyond a critical point, one has a condensate, containing interacting and hence color-connected sources. This point thus specifies the onset of color deconfinement. We show that the transverse momentum and multiplicity distributions are related to each other in a defined way. We obtain a non-monotonic dependence of the $p_T$ and multiplicity fluctuations with the number of participants. We present our results for the fluctuations and the transverse momentum distributions at RHIC energies compared to the existing experimental data and our predictions for LHC energies.

    Comment: 4 pages, 7 figures. Contribution to QM2008, to be published in Indian Journal of Physics
    Keywords High Energy Physics - Phenomenology
    Subject code 612
    Publishing date 2008-05-22
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article: Percolation effects in very-high-energy cosmic rays.

    Dias de Deus, J / Santo, M C Espírito / Pimenta, M / Pajares, C

    Physical review letters

    2006  Volume 96, Issue 16, Page(s) 162001

    Abstract: Cosmic ray data at high energies present a number of well-known puzzles. At very high energies (E approximately 10(20) eV) there are indications of a discrepancy between ground array experiments and fluorescence detectors. On the other hand, the ... ...

    Abstract Cosmic ray data at high energies present a number of well-known puzzles. At very high energies (E approximately 10(20) eV) there are indications of a discrepancy between ground array experiments and fluorescence detectors. On the other hand, the dependence of the depth of the shower maximum Xmax with the primary energy shows a change in slope (E approximately 10(17) eV) which is usually explained assuming a composition change. Both effects could be accounted for in models predicting that above a certain energy showers would develop deeper in the atmosphere. In this Letter we argue that this can be done naturally by including percolation effects in the description of the shower development, which cause a change in the behavior of the inelasticity K above E approximately 10(17) eV.
    Language English
    Publishing date 2006-04-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.96.162001
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  8. Article: String fusion and multinucleon interactions in nuclei.

    Braun / Pajares

    Physical review. C, Nuclear physics

    1995  Volume 51, Issue 2, Page(s) 879–889

    Language English
    Publishing date 1995-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209771-0
    ISSN 1089-490X ; 0556-2813 ; 2469-9985
    ISSN (online) 1089-490X
    ISSN 0556-2813 ; 2469-9985
    DOI 10.1103/physrevc.51.879
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  9. Article: Cross sections and multiplicities in hadron-nucleus collisions with interacting color strings.

    Braun / Pajares

    Physical review. D, Particles and fields

    1993  Volume 47, Issue 1, Page(s) 114–122

    Language English
    Publishing date 1993-01-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209772-2
    ISSN 0556-2821 ; 2470-0010 ; 1550-7998
    ISSN 0556-2821 ; 2470-0010 ; 1550-7998
    DOI 10.1103/physrevd.47.114
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  10. Article: Inelastic diffractive production and string fusion in hadron-nucleus collisions.

    Armesto / Braun / Pajares

    Physical review. C, Nuclear physics

    1995  Volume 51, Issue 6, Page(s) 3393–3403

    Language English
    Publishing date 1995-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209771-0
    ISSN 1089-490X ; 0556-2813 ; 2469-9985
    ISSN (online) 1089-490X
    ISSN 0556-2813 ; 2469-9985
    DOI 10.1103/physrevc.51.3393
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