36 research outputs found
Low-|t| structures in elastic scattering at the LHC
Possible low- structures in the differential cross section of
elastic scattering at the LHC are predicted. It is argued that the change of
the slope of the elastic cross section near GeV has the same
origin as that observed in 1972 at the ISR, both related to the
branch point in the -channel of the scattering amplitude. Apart from that
structure, tiny oscillations at small may be present on the cone at low
.Comment: 13 pages, 4 Tables; to be published in Acta Physica Polonica
Entropy Production During Hadronization of a Quark-Gluon Plasma
We revisit the physical pictures for the hadronization of quark-gluon plasma,
concentrating on the problem of entropy production during processes where the
number of degrees of freedom is seemingly reduced due to color confinement.
Based on observations on Regge trajectories we propose not having an infinite
tower of hadronic resonances. We discuss possible entropy production mechanisms
far from equilibrium in terms of stochastic dynamics.Comment: Submitted to EPJ A Topical Issue on "Frontiers in nuclear, heavy ion
and strong field physics", in memoriam Walter Greine
Saturation effects in low-x DIS structure functions and related hadronic total cross sections
High-energy nucleon total cross sections are related to low-x DIS structure
functions by using the additive quark model.Comment: Proceedings QUARKS-2016 - 19th International Seminar on High Energy
Physics, Pushkin, Russia, 29 May - 4 June, 2016, 4 pages, 2 figure
Scalar perturbations in cosmological models with quark nuggets
In this paper we consider the Universe at the late stage of its evolution and
deep inside the cell of uniformity. At these scales, the Universe is filled
with inhomogeneously distributed discrete structures (galaxies, groups and
clusters of galaxies). Supposing that a small fraction of colored objects
escaped hadronization and survived up to now in the form of quark-gluon nuggets
(QNs), and also taking into account radiation, we investigate scalar
perturbations of the FRW metrics due to inhomogeneities of dustlike matter as
well as fluctuations of QNs and radiation. In particular, we demonstrate that
the nonrelativistic gravitational potential is defined by the distribution of
inhomogeneities/fluctuations of both dustlike matter and QNs. Consequently, QNs
can be distributed around the baryonic inhomogeneities (e.g., galaxies) in such
a way that it can solve the problem of the flatness of the rotation curves. We
also show that the fluctuations of radiation are caused by both the
inhomogeneities in the form of galaxies and the fluctuations of quark-gluon
nuggets. Therefore, if QNs exist, the CMB anisotropy should contain also the
contributions from QNs. Additionally, the spatial distribution of the radiation
fluctuations is defined by the gravitational potential. All these results look
physically reasonable.Comment: 7 pages, no figures. arXiv admin note: text overlap with
arXiv:1301.041
Low missing mass, single- and double diffraction dissociation at the LHC
Low missing mass, single- and double diffraction dissociation is calculated
for the LHC energies from a dual-Regge model, dominated by a Pomeron Regge pole
exchange. The model reproduces the rich resonance structure in the low missing
mass Mx region. The diffractionly excited states lie on the nucleon trajectory,
appended by the isolated Roper resonance. Detailed predictions for the squared
momentum transfer and missing mass dependence of the differential and
integrated single- and double diffraction dissociation in the kinematical range
of present and future LHC measurements are given. The model predicts a possible
turn-down of the cross section towards, t -> 0 in a region probably accessible
in future experiments in the nearly forward direction.
The present work is a continuation and extension (e.g. with double
diffraction) of a previous work using the dual Regge approach