# Production properties of $K*(892)\pm$ vector mesons and their spin alignment as measured in the NOMAD experiment

Abstract : First measurements of K*(892) mesons production properties and their spin alignment in nu_mu charged current (CC) and neutral current (NC) interactions are presented. The analysis of the full data sample of the NOMAD experiment is performed in different kinematic regions. For K*+ and K*- mesons produced in nu_mu CC interactions and decaying into K0 pi+/- we have found the following yields per event: (2.6 +/- 0.2 (stat.) +/- 0.2 (syst.))% and (1.6 +/- 0.1 (stat.) +/- 0.1 (syst.))% respectively, while for the K*+ and K*- mesons produced in nu NC interactions the corresponding yields per event are: (2.5 +/- 0.3 (stat.) +/- 0.3 (syst.))% and (1.0 +/- 0.3 (stat.) +/- 0.2 (syst.))%. The results obtained for the rho00 parameter, 0.40 +/- 0.06 (stat) +/- 0.03 (syst) and 0.28 +/- 0.07 (stat) +/- 0.03 (syst) for K*+ and K*- produced in nu_mu CC interactions, are compared to theoretical predictions tuned on LEP measurements in e+e- annihilation at the Z0 pole. For K*+ mesons produced in nu NC interactions the measured rho00 parameter is 0.66 +/- 0.10 (stat) +/- 0.05 (syst).
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00115967
Contributor : Claudine Bombar <>
Submitted on : Friday, November 24, 2006 - 11:55:50 AM
Last modification on : Wednesday, July 22, 2020 - 9:54:09 AM

### Citation

D. Naumov, A. Chukanov, E. Naumova, B. Popov, P. Astier, et al.. Production properties of $K*(892)\pm$ vector mesons and their spin alignment as measured in the NOMAD experiment. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2006, 46, pp.69-79. ⟨10.1140/epjc/s2006-02500-4⟩. ⟨in2p3-00115967⟩

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