Collisions of cosmic ray particles with ultrahigh initial energies with nuclei in the atmosphere open a wide room for appearing of the novel dynamical features for multiparticle production processes. ...In particular, the laser-like behavior of pions driven by Bose–Einstein condensation would result in the shift to larger multiplicities and, as a consequence, could provide, in general, the enhanced yield of cosmic muons. In the present work the critical value of the space charged particle density for onset of Bose–Einstein condensation of the boson (pion) wave packets into the same wave-packet state is estimated within the model with complete multiparticle symmetrization for the energy domain corresponding to the ultrahigh energy cosmic rays (UHECR). Energy dependence of mean density of charged pions is evaluated for the cases of absence of the Bose–Einstein effects and for presence of laser-like behavior of pions. The possible influence of the Bose–Einstein condensation is discussed for the muon production in UHECR particle collisions with the atmosphere.
The top quark, the heaviest quark and, indeed, the heaviest elementary particle known today, constitutes a novel probe of the long-lived medium in quark-gluon phase which, as expected, can be ...produced even in light nuclei collisions at ultra-high energies. Some distinctive features are considered for particle production in the top sector in ultra-high energy domain. The antitop-top pair production is studied within the quantum chromodynamics and effective field theory approach used for calculations of total partonic cross sections. Predictions for all observables are computed at NNLO in quantum chromodynamics and at LO in effective field theory. These quantitative results can be important for both the future collider experiments at center-of-mass energy frontier and the improvement of the phenomenological models for development of the cosmic ray cascades in ultra-high energy domain. Thus the study allows the better understanding of heavy particle production and emphasizes the exciting interrelation between the high-energy physics on accelerators and ultra-high energy cosmic ray measurements.
The processes with single top quark production provide a prototype search for the types of final state that are expected in many new physics scenarios. Some distinctive features are considered for ...particle production in the top sector in ultra-high energy domain which can be covered partly in the collisions of cosmic ray particles with atmosphere. The single top quark production through electroweak interaction is studied within the Standard Model and the Effective Field Theory approach used for calculations of total partonic cross sections in
–channel. These quantitative results can be important for both the future collider experiments at center-of-mass energy frontier and the improvement of the phenomenological models for development of the cosmic ray cascades in ultra-high energy domain. Thus the study allows the better understanding of heavy particle production and emphasizes the exciting interrelation between the high-energy physics on accelerators and ultra-high energy cosmic ray measurements.
Purpose. The purity of consciousness in European culture has practically been turned into an abstraction. Because of this, there are so many discrepancies in understanding its nature. For Heidegger, ...the question of the purity of human consciousness remains open. Our purpose is to study the purity of European consciousness in the work of M. Heidegger. Theoretical basis. We draw on the deep foundations of existential, phenomenological, hermeneutic, religious-philosophical and postmodern Western and Eastern thought. Originality. While the early Heidegger was thinking under the sign of Dasein, he did not hear the nature of the "pure consciousness" of human. Nevertheless, temporality for him was such a fundamental property that it determined the depth of understanding not only of being, but also of human consciousness itself (like Dasein). In this context, we begin to understand that the depth of consciousness in the concept of early Heidegger can be associated with its temporality. In fact, towards the end of "Being and Time", Heidegger, thinking more and more about the understanding of time from the horizon of being, begins to form similar ideas about understanding itself, that is, about human consciousness, in the sense that consciousness itself arises from the horizon of time (and being). What, then, is pure human consciousness the pure time? Does not this mean that the original meaning of consciousness is in its directed temporalizing. This temporalizing of consciousness of human (as a thinking being), which arises from the future, is perceived in three modes and reveals the fundamental nature of the consciousness itself (thinking is a stream of consciousness and, in such a context, directed understanding). Paraphrasing Heidegger, we say that the ontological meaning of pure human consciousness is revealed as temporality. Already after writing Being and Time, Heidegger thinks about the origins of the European consciousness, its comprehending from the depths (originality) of the being of European culture. Conclusions. The early Heidegger seeks the purity of being and, at the same time, strives more and more to understand the essence of the purity of human thinking. All of Heidegger’s work is a consistent transition from human understanding of the purity of being (Dasein) to the purity of thinking of a human himself. In this sense, there is a transformation of M. Heidegger’s consciousness from fundamental ontology (Dasein) in the early period to existential anthropology (human consciousness) in the late period.
Мета. Чистоту свідомості в європейській культурі практично перетворили на абстракцію. Через це так багато різночитань у розумінні її природи. У М. Гайдеґґера питання чистоті свідомості залишається відкритим. Нашою метою є вивчення чистоти європейської свідомості у творчості Гайдеґґера. Теоретичний базис. Я спираюся на глибинні основи екзистенціальної, феноменологічної, герменевтичної, релігійно-філософської та постмодерної західної й східної думок. Наукова новизна. Поки ранній Гайдеґґер мислив під знаком Dasein, він не чув природу "чистої свідомості" людини. Тим не менш, тимчасовість у нього була настільки фундаментальною властивістю, що визначала глибину розуміння не тільки буття, а й самої свідомості людини (як Dasein). У цьому контексті ми починаємо розуміти, що глибину свідомості у концепції раннього Гайдеґґера можна порівнювати з її тимчасовістю. Фактично, Гайдеґґер ближче до кінця "Буття і часу", все більше замислюючись про розуміння часу з горизонту буття, починає формувати схожі уявлення про саме розуміння, тобто про свідомість людини, у тому сенсі, що і сама свідомість виникає з горизонту часу (і буття). Що ж, у такому разі, чиста свідомість людини є чистий час? Чи не означає це, що вихідний сенс свідомості у її спрямованому руху внутрішнього часу. Цей внутрішній рух часу свідомості людина (як мислячої істоти), що витікає з майбутнього, сприймається у трьох модусах і розкриває фундаментальну сутність самої свідомості (мислення – це потік свідомості й у такому контексті спрямоване розуміння). Перефразовуючи Гайдеґґера, говоримо про те, що онтологічний сенс чистої свідомості людини розкривається як тимчасовість. Вже після написання "Буття і часу" Гайдеґґер замислюється про витоки європейської свідомості, її осмислення з глибин (витоку) буття європейської культури. Висновки. Ранній Гайдеґґер шукає чистоту буття і водночас дедалі більше прагне зрозуміти сутність чистоти мислення людини. Вся творчість Гайдеґґера – це послідовний перехід від розуміння людиною чистоти буття (Dasein) до чистоти мислення самої людини. У такому сенсі відбувається трансформація свідомості М. Гайдеґґера від фундаментальної онтології (Dasein) у ранній період до екзистенціальної антропології (свідомості людини) у пізній період.
Estimations of some geometrical and bulk parameters are presented for the matter produced in various type collisions with ultra-high energy cosmic ray (UHECR) particles. Results for multiplicity ...density at midrapidity, decoupling time, and energy density are discussed for small and larger collision systems. Based on the analytic functions suggested previously elsewhere, estimations for a wide set of space—time quantities are obtained for emission region created in various particle collisions at energies of UHECR. The space particle densities at freeze-out are derived also and allow the possibility of novel features for secondary particle production like Bose—Einstein condensation at least for nuclear interactions with UHECR particles. The estimations obtained for global and geometrical parameters indicate the creation of deconfined quark—gluon matter with large enough volume and lifetime even in light nuclear collisions at UHECR energies. These quantitative results can be important for both the future collider experiments at center-of-mass energy frontier and the improvement of the phenomenological models for development of the cosmic ray cascades in ultra-high energy domain.
The results obtained from a phenomenological analysis of the ratio of the elastic-to-total cross sections for proton-proton (
pp
) and antiproton-proton (
(
p
¯
p
)
) scattering as a function of ...energy are presented. Analytic functions proposed on the basis of studying low- and high-energy experimental data for various scattering parameters make it possible to obtain a statistically acceptable quantitative description of the energy dependence of this ratio over a broad energy region of
s
≥
3
GeV for individual samples of
pp
and
p
¯
p
collisions and over the region of
s
≥
5
GeV for a combined ensemble of experimental data. On the basis of the resulting approximations, the ratio of the elastic-to-total cross sections
for pp
collisions are estimated at various values of
s
up to an ultrahigh energy of
s
=
10
PeV. The resulting estimates may prove to be useful for experiments at currently operating and future hadron colliders, as well as for measurements of ultrahigh-energy cosmic rays. An indication of the onset of the asymptotic region for the cross-section ratio in question is observed in the region of
s
≳
5
−
10
PeV.
This paper presents a qualitative explanation for the hollowness effect based on the inelastic overlap function, claiming this result is a consequence of fundamental thermodynamic processes. Using ...the Tsallis entropy, one identifies the entropic index w with the ratio of the collision energy to critical one in the total cross-section. The integrated probability density function is replaced by the inelastic overlap function, which represents the probability of occurrence of an inelastic event depending on both the collision energy and impact parameter. The Coulomb potential, as well as the confinement potential, are used as naive approaches to describe the (internal) energy of the colliding hadrons. The Coulomb potential in the impact parameter picture is not able to furnish any reliable physical result near the forward direction. However, the confinement potential in the impact parameter space results in the hollowness effect shown by the inelastic overlap function near the forward direction.
.
The discussion is focused on the study of the fundamental symmetries (
P
/
CP
) of QCD and geometry of the particle source. The combination of correlators corresponding to the absolute asymmetry of ...distribution of electrically charged particles with respect to the reaction plane in heavy-ion collisions is studied. A significant decrease of the absolute asymmetry is observed in the intermediate energy range which can be considered as indication of possible transition to predominance of hadronic states over quark-gluon degrees of freedom in the mixed phase created in heavy-ion collisions at intermediate energies. For the investigation of the energy evolution of the geometric properties of the particle source the use of femtoscopic radii scaled on the averaged radius of colliding ions is suggested. This approach allows the expansion of the set of interaction types, in particular, on the collisions of non-symmetrical ion beams which can be studied within the framework of common treatment. There is no sharp changing of femtoscopic parameter values with increasing of the initial energy. The suggestions are made for future advancement of these studies on NICA-MPD.
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