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We show that the cross section of the diffractive production of $b \bar b$ can be described as the sum of two contributions: the first is proportional to the probability of finding a small size $b \bar b$ color dipole in the fast hadron…

High Energy Physics - Phenomenology · Physics 2016-08-24 G. Alves , E. Levin , A. Santoro

The modification of two particle correlations within a jet due to its propagation through dense strongly interacting matter is explored. Different properties of the medium may be probed by varying the momentum of the detected hadrons. Very…

Nuclear Theory · Physics 2008-11-26 A. Majumder

The soft production problem in hadronic collisions as described in the eikonal color mutation branching model is improved in the way that the initial parton distribution is treated. Furry branching of the partons is considered as a means of…

High Energy Physics - Phenomenology · Physics 2009-10-31 R. C. Hwa , Y. Wu

Single diffractive Drell-Yan reaction in hadron-hadron collisions is considered as an important source of information on the properties of soft QCD interactions. In particular, it provides an access to the dynamics of the QCD factorisation…

High Energy Physics - Phenomenology · Physics 2015-03-19 Roman Pasechnik , Boris Kopeliovich

Double parton scattering events are directly sensitive to the correlations between two partons inside a proton and can answer fundamental questions on the connections between the proton constituents. In this chapter, the different types of…

High Energy Physics - Phenomenology · Physics 2018-01-11 Tomas Kasemets , Sergio Scopetta

The information on dynamical fluctuations that can be extracted from the anomalous scaling observed recently in hadron-hadron collision experiments is discussed in some detail. A parameter ``effective fluctuation strength'' is proposed to…

High Energy Physics - Phenomenology · Physics 2009-10-31 Liu Lianshou , Fu Jinghua , Wu Yuanfang

In relativistic heavy ion collisions, the cross section of heavy hadron production via the combination of a heavy quark with a light one from the quark-gluon matter can be factorized. It is the convolution of twist-4 combination matrix…

High Energy Physics - Phenomenology · Physics 2007-05-23 Shi-Yuan Li

The cross sections for the production of hadrons in quasi-real photon-photon collisions in proton-proton and heavy ion interactions are compared with the corresponding cross sections for central diffraction and for photon-pomeron…

High Energy Physics - Phenomenology · Physics 2008-02-03 R. Engel , M. A. Braun , C. Pajares , J. Ranft

We present a new parton model approach for hadron-hadron interactions and, in particular, for the initial stage of nuclear collisions at very high energies (RHIC, LHC and beyond). The most important aspect of our approach is a…

High Energy Physics - Phenomenology · Physics 2009-10-31 H. J. Drescher , M. Hladik , S. Ostapchenko , T. Pierog , K. Werner

The measurement of particle correlations and fluctuations has been suggested as a method to search for the existence of a phase transition in relativistic heavy ion collisions. If quark-gluon matter is formed in the collision of…

Nuclear Experiment · Physics 2019-08-13 Terence J. Tarnowsky

We give a simple quantum mechanical formulation of the eikonal propagation approximation, which has been heavily used in recent years in problems involving hadronic interactions at high energy. This provides a unified framework for several…

High Energy Physics - Phenomenology · Physics 2009-11-07 Alex Kovner , Urs Achim Wiedemann

This brief review of hard diffraction is focussed on the theory of the diffractive structure function F_2^D. Some aspects of diffractive vector meson production and of diffractive processes in hadron-hadron collisions are also discussed.

High Energy Physics - Phenomenology · Physics 2007-05-23 A. Hebecker

We demonstrate that the global properties of the ``rapidity gap'' events, observed at HERA, can be understood based on electron-gluon scattering as the underlying partonic process. Using the measured inclusive structure function $F_2$ to…

High Energy Physics - Phenomenology · Physics 2009-02-20 W. Buchmuller , A. Hebecker

A physical model is presented for the non-perturbative parton distributions in the nucleon. This is based on quantum fluctuations of the nucleon into baryon-meson pairs convoluted with Gaussian momentum distributions of partons in hadrons.…

High Energy Physics - Phenomenology · Physics 2019-08-14 Andreas Ekstedt , Hazhar Ghaderi , Gunnar Ingelman , Stefan Leupold

We study the fluctuation theory analysis of multiple soft interactions that are used to design SIBYLL 2.1 and related cosmic ray event generators. We examine fluctuation stabilities of Lund string fragmentation involving quark-antiquark and…

High Energy Physics - Phenomenology · Physics 2020-08-26 Rahul Kumar Thakur , Bhupendra Nath Tiwari , Rahul Nigam

We study hard diffractive scattering in hadron-hadron collisions including, on top of the standard Pomeron-initiated processes, contributions due to the exchange of Reggeons. Using a simple model to describe the parton content of the…

High Energy Physics - Phenomenology · Physics 2017-01-10 C. Marquet , D. E. Martins , A. V. Pereira , M. Rangel , C. Royon

We argue that if the growing part of hadron-hadron cross section (described phenomenologically by the supercritical soft Pomeron) is due to instanton/sphaleron mechanism, one should find certain qualitative features of the produced cluster…

High Energy Physics - Phenomenology · Physics 2009-11-07 Edward V. Shuryak

In this work we consider the QCD parton saturation models to describe soft interactions at the high energy limit. The total and elastic cross sections as well as the elastic slope parameter are obtained for proton-proton and pion-proton…

High Energy Physics - Phenomenology · Physics 2020-05-06 G. M. Peccini , F. Kopp , M. V. T. Machado , D. A. Fagundes

Close to one half of the LHC events are expected to be due to elastic or inelastic diffractive scattering. Still, predictions based on extrapolations of experimental data at lower energies differ by large factors in estimating the relative…

High Energy Physics - Experiment · Physics 2010-04-22 Mikael Kuusela , Jerry W. Lamsa , Eric Malmi , Petteri Mehtala , Risto Orava

The rates for diffractive quarkonium plus prompt-photon associated production at the LHC are estimated. The theoretical framework considered in the J/Psi (or Upsilon) production associated with a direct photon at the hadron collider is the…

High Energy Physics - Phenomenology · Physics 2010-01-15 M. B. Gay Ducati , M. M. Machado , M. V. T. Machado