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Письма в Журнал экспериментальной и теоретической физики, 2012, том 96, выпуск 11, страницы 771–777
(Mi jetpl3293)
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Эта публикация цитируется в 6 научных статьях (всего в 6 статьях)
ПОЛЯ, ЧАСТИЦЫ, ЯДРА
Non-linear BFKL dynamics:
color screening vs. gluon fusion
R. Fioreab, P. V. Sasorovc, V. R. Zollerc a Università degli Studi della Calabria, Dipartimento di Fisica
b Istituto Nazionale di Fisica Nucleare
c Institute for Theoretical and Experimental Physics (Russian Federation State Scientific Center), Moscow
Аннотация:
A feasible mechanism of unitarization of amplitudes of deep inelastic scattering at small values of Bjorken $x$ is the gluon fusion. However, its efficiency depends crucially on the vacuum color screening effect which accompanies the multiplication and the diffusion of BFKL gluons from small to large distances. From the fits to lattice data on field strength correlators the propagation length of perturbative gluons is $R_c\simeq (0.2$–$0.3)$ Fm. The probability to find a perturbative gluon with short propagation length at large distances is suppressed exponentially. It changes the pattern of (dif)fusion dramatically. The magnitude of the fusion effect appears to be controlled by the new dimensionless parameter $\sim R_c^2/8B$, with the diffraction cone slope $B$ standing for the characteristic size of the interaction region. It should slowly $\propto 1/\ln Q^2$ decrease at large $Q^2$. Smallness of the ratio $R_c^2/8B$ makes the non-linear effects rather weak even at lowest Bjorken $x$ available at HERA. We report the results of our studies of the non-linear BFKL equation which has been generalized to incorporate the running coupling and the screening radius $R_c$ as the infrared regulator.
Поступила в редакцию: 25.10.2012
Образец цитирования:
R. Fiore, P. V. Sasorov, V. R. Zoller, “Non-linear BFKL dynamics:
color screening vs. gluon fusion”, Письма в ЖЭТФ, 96:11 (2012), 771–777; JETP Letters, 96:11 (2012), 687–693
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl3293 https://www.mathnet.ru/rus/jetpl/v96/i11/p771
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Страница аннотации: | 175 | PDF полного текста: | 45 | Список литературы: | 35 | Первая страница: | 3 |
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