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Partonic transverse momenta in soft collisions.

Khoze, V. A. and Martin, A. D. and Ryskin, M. G. (2014) 'Partonic transverse momenta in soft collisions.', European physical journal C., 74 (12). p. 3199.


The partonic transverse momentum, kt , distribution plays a crucial role in driving high-energy hadron interactions. If kt is limited we have old fashioned Regge theory. If kt increases with energy the interaction may be described by perturbative QCD. We use BFKL diffusion in lnkt , supplemented by a stronger absorption of low kt partons, to estimate the growth of the mean transverse momenta ⟨kt⟩ with energy. This growth reveals itself in the distribution of secondaries produced at the collider energies. We present a simple, BFKL-based, model to demonstrate the possible size of the effect. Moreover, we propose a way to evaluate experimentally the shape of the parton transverse momenta distribution by studying the spectra of the ( D or B ) mesons which contain one heavy quark.

Item Type:Article
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Publisher statement:© The Author(s) 2014. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Funded by SCOAP3 / License Version CC BY 4.0.
Date accepted:22 November 2014
Date deposited:16 April 2019
Date of first online publication:12 December 2014
Date first made open access:No date available

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