ON MULTIPLICITY DISTRIBUTIONS

1996 ◽  
Vol 11 (34) ◽  
pp. 2681-2692 ◽  
Author(s):  
DING-WEI HUANG
Keyword(s):  
Multiplicity Distribution ◽  
Negative Binomial ◽  
High Energy ◽  
Energy Limit ◽  
High Energy Limit ◽  
Multiple Production ◽  
Very High Energy ◽  
Multiplicity Distributions ◽  
Very High ◽  
New Distribution

We show that four different approaches in multiple production give exactly the same multiplicity distribution. Various experimental data can be well described by this new multiplicity distribution. We compare this new distribution to the negative binomial distribution. The restoration of KNO scaling at the very high energy limit is discussed. A nonvanishing value of the scaled multiplicity distribution Ψ(z) at z=0 is predicted.

Very-High-Energy Limit of Proton-Proton Scattering

1970 ◽  
Vol 2 (3) ◽  
pp. 572-577 ◽  
Author(s):  
A. O. Barut ◽  
W. Plywaski
Keyword(s):  
High Energy ◽  
Proton Scattering ◽  
Energy Limit ◽  
Proton Proton ◽  
High Energy Limit ◽  
Very High Energy ◽  
Very High

scholarly journals QGSJET-III model: physics and preliminary results

2019 ◽  
Vol 208 ◽  
pp. 11001 ◽  
Author(s):  
Sergey Ostapchenko
Keyword(s):  
High Energy ◽  
Previous Model ◽  
Energy Limit ◽  
High Energy Limit ◽  
New Model ◽  
Preliminary Results ◽  
Model Version ◽  
Power Corrections ◽  
Very High Energy ◽  
Very High

We discuss in some detail the physics content of the new model, QGSJET-III-01, focusing on major problems related to the treatment of semihard processes in the very high energy limit. A special attention has been payed to the main improvement, compared to the QGSJET-II model, which is related to a phenomenological treatment of leading power corrections corresponding to final parton rescattering off soft gluons. In particular, this allowed us to use a twice smaller separation scale between the soft and hard parton physics, compared to the previous model version, QGSJET-II-04. Preliminary results obtained with the new model are also presented.

QCD JETS PREDICTION FOR THE MULTIPLICITY DISTRIBUTIONS AT $p {\bar p}$ COLLIDERS

1988 ◽  
Vol 03 (05) ◽  
pp. 517-529
Author(s):  
E.D. MALAZA
Keyword(s):  
Perturbative Qcd ◽  
Multiplicity Distribution ◽  
High Energy ◽  
Energy Limit ◽  
High Energy Limit ◽  
Multijet Production ◽  
Multiplicity Distributions

Multijet production is now a confirmed phenomenon at the CERN [Formula: see text] collider, and is well understood in the framework of perturbative QCD. Also present but not clearly understood within QCD are soft non-jet events. We make predictions for the high energy limit Q2→∞, where the jet component is expected to be dominant, using known results of QCD jets to study the shape of the multiplicity distribution in [Formula: see text] collisions. We work to [Formula: see text] of perturbative QCD.

scholarly journals The LPM effect in sequential bremsstrahlung: nearly complete results for QCD

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
Peter Arnold ◽  
Tyler Gorda ◽  
Shahin Iqbal
Keyword(s):  
High Energy ◽  
Leading Order ◽  
Energy Limit ◽  
Analytic Investigation ◽  
Very High Energy ◽  
Double Splitting ◽  
Emission Limit ◽  
Coherence Lengths ◽  
Very High ◽  
Virtual Loop

Abstract The splitting processes of bremsstrahlung and pair production in a medium are coherent over large distances in the very high energy limit, which leads to a suppression known as the Landau-Pomeranchuk-Migdal (LPM) effect. We continue study of the case when the coherence lengths of two consecutive splitting processes overlap (which is important for understanding corrections to standard treatments of the LPM effect in QCD), avoiding soft-emission approximations. Previous work has computed overlap effects for double splitting g → gg → ggg. To make use of those results, one also needs calculations of related virtual loop corrections to single splitting g → gg in order to cancel severe (power-law) infrared (IR) divergences. This paper provides calculations of nearly all such processes involving gluons and discusses how to organize the results to demonstrate the cancellation. In the soft emission limit, our results reproduce the known double-log behavior of earlier authors who worked in leading-log approximation. We also present a first (albeit numerical and not yet analytic) investigation of sub-leading, single IR logarithms. Ultraviolet divergences appearing in our calculations correctly renormalize the coupling αs in the usual LPM result for leading-order g → gg.

Very high energy multiplicity distributions

2004 ◽  
Vol 67 (1) ◽  
pp. 47-49
Author(s):  
L. L. Jenkovszky ◽  
B. V. Struminsky
Keyword(s):  
High Energy ◽  
Very High Energy ◽  
Multiplicity Distributions ◽  
Very High

scholarly journals On Multiparticle Production in Very High Energy Scattering

2020 ◽  
Vol 240 ◽  
pp. 07001
Author(s):  
Pulkit Agarwal ◽  
Han Wei Ang ◽  
Zongjin Ong ◽  
Aik Hui Chan ◽  
Choo Hiap Oh
Keyword(s):  
Particle Production ◽  
Stochastic Equation ◽  
Initial Conditions ◽  
High Energy ◽  
Beam Line ◽  
Very High Energy ◽  
High Energy Collisions ◽  
Multiplicity Distributions ◽  
High Energy Scattering ◽  
Very High

A phenomenological model of particle production and hadronisation in high energy collisions is formulated using Dirac fields in Yukawa-like interaction and the resulting stochastic equation is solved numerically. Different initial conditions are used to compare particle- particle (ψ ψ) and particle-antiparticle (ψ* ψ) interactions. It is shown that in this simplified view, there is a clear difference between the final multiplicity distributions resulting from the two initial conditions. To model the restricted phase space (limited pseudorapidity) measurements in experiment, a “loss” function is also proposed to account for the undetected particles close to the beam line.

Strong interactions at very high energy

1964 ◽  
Vol 82 (1) ◽  
pp. 3-81 ◽  
Author(s):  
Evgenii L. Feinberg ◽  
Dmitrii S. Chernavskii
Keyword(s):  
High Energy ◽  
Strong Interactions ◽  
Very High Energy ◽  
Very High
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