/ nucl-ex arXiv:1505.06184

$K^{*}(892)^{+}$ production in proton-proton collisions at $E_{\rm beam} = 3.5$ GeV

Pages: 7

Abstract: We present results on the $K^{*}(892)^{+}$ production in proton-proton collision s at a beam energy of $E = 3.5$~GeV, which is hitherto the lowest energy at which this mesonic resonance has been observed in nucleon- nucleon reactions. The data are interpreted within a two-channel model that includes the 3-body production of $K^{*}(892)^{+}$ associated with the $\Lambda$- or $\Sigma$-hyperon. The relative contributions of both channels are estimated. Besides the total cross section $\sigma(p+p \to K^{*}(892)^{+} + X) = 9.5 \pm 0.9 ^{+1.1}_{-0.9} \ pm 0.7$~$\mu$b, that adds a new data point to the excitation function of the $K^{*}(892)^{+}$ production in the region of low excess energy, transverse momenta and angular spectra are extracted and compared with the predictions of the two-channel model. The spin characteristics of $K^{*}(892)^{+}$ are discussed as well in terms of the spin-alignment.

Note: 7 pages, 9 figures, 1 table

Total numbers of views: 757
Numbers of unique views: 375
Запись создана 2015-06-01, последняя модификация 2015-06-01

Внешние ссылки:
Полный текст
Оценить этот документ:

1
2
3

(Еще не рецензированная)