Production of $\chi_c$- and $\chi_b$-mesons in high energy hadronic collisions
| Autor: | Likhoded, A. K., Luchinsky, A. V., Poslavsky, S. V. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. D 90 (2014), 074021 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.90.074021 |
| Popis: | This paper is devoted to phenomenological study of $\chi_{c,b}$-mesons production in high energy hadronic collisions in the framework of NRQCD. We analyze all available experimental data on $\chi_c$-mesons production and extract non-perturbative NRQCD matrix elements from fitting the data. We show, that measured $p_T$-spectrum of $\chi_c$-mesons is mainly formed by color singlet components, while $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ ratio depends strongly on color octet matrix elements; this ratio becomes a highly sensitive tool to study contribution of different terms from the NRQCD expansion. Obtained using NRQCD scaling rules predictions for $\chi_b$-mesons cross sections are also given. Comment: 10 pages, 7 figures |
| Databáze: | arXiv |
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