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Письма в Журнал экспериментальной и теоретической физики, 2012, том 95, выпуск 2, страницы 61–66
(Mi jetpl2419)
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Эта публикация цитируется в 3 научных статьях (всего в 3 статьях)
ПОЛЯ, ЧАСТИЦЫ, ЯДРА
Heavy quark currents in Ultra-High Energy Neutrino Interactions
R. Fiorea, V. R. Zollerb a Università degli Studi della Calabria, Dipartimento di Fisica
b Institute for Theoretical and Experimental Physics (Russian Federation State Scientific Center), Moscow
Аннотация:
We discuss heavy quark contributions to the neutrino-nucleon total cross section at very high energies, well above the real top production threshold. The top-bottom weak current is found to generate strong left-right asymmetry of neutrino-nucleon interactions. We separate contributions of different helicity states and make use of the $\boldsymbol{\kappa}$-factorization to derive simple and practically useful formulas for the left-handed ($F_L$) and right-handed ($F_R$) components of the conventional structure function $2xF_3=F_L-F_R$ in terms of the integrated gluon density. We show that $F_L\gg F_R$ and, consequently, $xF_3\approx F_T$, where $F_T$ is the transverse structure function. The conventional structure function $F_2=F_S+F_T$ at $Q^2\ll m_t^2$ appears to be dominated by its scalar (also known as longitudinal) component $F_S$ and the hierarchy $F_S\gg F_L\gg F_R$ arises naturally. We evaluate the total neutrino-nucleon cross section at ultra-high energies within the color dipole BFKL-formalism.
Поступила в редакцию: 15.12.2011
Образец цитирования:
R. Fiore, V. R. Zoller, “Heavy quark currents in Ultra-High Energy Neutrino Interactions”, Письма в ЖЭТФ, 95:2 (2012), 61–66; JETP Letters, 95:2 (2012), 55–60
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/jetpl2419 https://www.mathnet.ru/rus/jetpl/v95/i2/p61
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