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This article gives an overview of recent highlights from experimental measurements of heavy-ion collisions at ultra-relativistic energies: Measurements of electroweak probes constrain both the initial collision geometry and the nuclear…

Nuclear Experiment · Physics 2020-12-17 Yvonne Pachmayer

We report the results of calculations of inclusive soft hadron production in proton-lead collisions at the LHC in the framework of modified quark-gluon string model (QGSM) extended to $pA$ interactions. Our consideration involves the…

High Energy Physics - Phenomenology · Physics 2026-03-20 A. V. Lipatov , G. I. Lykasov , M. A. Malyshev

Recent data from LHC13 by the TOTEM Collaboration have indicated an unexpected decrease in the value of the $\rho$ parameter and a $\sigma_{tot}$ value in agreement with the trend of previous measurements at 7 and 8 TeV. These data at 13…

High Energy Physics - Phenomenology · Physics 2018-10-10 M. Broilo , E. G. S. Luna , M. J. Menon

Soft colour exchange models give a unified description of both diffractive and non-diffractive events, such that e-p and p-pbar collider data with and without rapidity gaps are well reproduced. We show that these models also describe the…

High Energy Physics - Phenomenology · Physics 2007-05-23 N. Timneanu , G. Ingelman

These lectures are the review of the main ideas and approaches to the structure of the Pomeron. They are divided in three natural parts: (i) the brief review of the Reggeon Calculus, which was the first attempt to build the effective theory…

High Energy Physics - Phenomenology · Physics 2016-09-01 Eugene Levin

We consider the first LHC data for pp collisions in the framework of Regge phenomenology, and the Quark-Gluon String Model, and we present the corresponding predictions for both the integral cross sections and the inclusive densities of…

High Energy Physics - Phenomenology · Physics 2011-06-14 C. Merino , C. Pajares , Yu. M. Shabelski

This is a short review of the properties of electron proton interactions characterized by the presence of large rapidity gaps (LRG) in the measured hadronic final state as obtained by the ZEUS Collaboration at the HERA Collider. In the deep…

High Energy Physics - Experiment · Physics 2008-02-03 Halina Abramowicz

We study the role of semi-classical QCD vacuum solutions in high energy scattering by considering the instanton contribution to hadronic cross sections. We propose a new type of instanton-induced interactions (``instanton ladder'') that…

High Energy Physics - Phenomenology · Physics 2009-10-31 Dmitri E. Kharzeev , Yuri V. Kovchegov , Eugene Levin

At high collision energies as achieved at the LHC there are increasing contributions from hard processes, which can be computed with perturbative QCD. Nevertheless, particle production is still dominated by soft QCD with transferred…

Nuclear Experiment · Physics 2019-08-12 Valentina Zaccolo

Lightly triggered events may yield surprises about the nature of "soft" particle production at LHC energies. I suggest that event displays in coordinates matched to the dynamics of particle production (rapidity and transverse momentum) may…

High Energy Physics - Phenomenology · Physics 2022-03-02 Chris Quigg

We found the parameterization of the unintegrated gluon distribution from the best description of the LHC data on the inclusive spectra of hadrons produced in $pp$ collisions at the mid-rapidity region and small transverse momenta. It is…

High Energy Physics - Phenomenology · Physics 2012-03-06 A. A. Grinyuk , H. Jung , G. I. Lykasov , A. V. Lipatov , N. P. Zotov

Using the analytical expression for transverse momentum dependent (TMD) gluon density in a proton, a self-consistent simultaneous description of low $Q^2$ data on proton structure function $F_2(x,Q^2)$, reduced cross section for the…

High Energy Physics - Phenomenology · Physics 2023-10-06 A. V. Lipatov , G. I. Lykasov , M. A. Malyshev

The Large Hadron Collider can do precision physics at a level that is competitive with electroweak precision constraints when probing physics beyond the Standard Model. We present a simple yet general parameterization of the effect of an…

High Energy Physics - Phenomenology · Physics 2013-11-27 J. de Blas , M. Chala , Jose Santiago

We introduce a simplified low-energy effective Lagrangian description of the phenomenology of heavy vector resonances in the minimal composite Higgs model, based on the coset SO(5)/SO(4), analysing in detail their interaction with lighter…

High Energy Physics - Phenomenology · Physics 2021-01-07 Davide Greco , Da Liu

Single diffraction processes was usually treated in the triple-reggeon framework, but this formalism is inconsistent with CDF data. In this paper we show, that multipomeron quasi-eikonal model gives agreement with these data. Cross-section…

High Energy Physics - Phenomenology · Physics 2007-05-23 V. A. Abramovsky , A. V. Dmitriev

A traditional Regge model with a $Q^2$-independent Pomeron intercept closed (or equal) to one is constructed in order to describe the available data on the proton structure function. A Dipole Pomeron model which does not explicitly violate…

High Energy Physics - Phenomenology · Physics 2014-11-17 P. Desgrolard , A. Lengyel , E. Martynov

We recall the main properties of inclusive particle distributions expected for Pomeron-proton and Pomeron-Pomeron interactions. Due to the small size of the Pomeron we expect larger transverse momenta of secondaries and a smaller…

High Energy Physics - Phenomenology · Physics 2019-08-14 V. A. Khoze , A. D. Martin , M. G. Ryskin

In this paper, we make a deep analysis for the five typical interacting holographic dark energy models with the interaction terms $Q=3\beta H_{0}\rho_{\rm{de}}$, $Q=3\beta H_{0}\rho_{\rm{c}}$, $Q=3\beta H_{0}(\rho_{\rm{de}}+\rho_{\rm c})$,…

Cosmology and Nongalactic Astrophysics · Physics 2017-12-29 Hai-Li Li , Jing-Fei Zhang , Lu Feng , Xin Zhang

The hard pomeron component needed to reproduce small-x data seems to be present in elastic scattering at moderate energy. If this is the case, it is likely that the total cross section at the LHC will be appreciably larger than previously…

High Energy Physics - Phenomenology · Physics 2007-10-30 J. R. Cudell , A. Lengyel , E. Martynov , O. V. Selyugin

The Large Hadron Collider forward (LHCf) experiment is designed to use the LHC to verify the hadronic-interaction models used in cosmic-ray physics. Forward baryon production is one of the crucial points to understand the development of…