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

D. Naumov , A. Chukanov , E. Naumova , B. Popov (1) , P. Astier (1) , D. Autiero , A. Baldisseri (2) , M. Baldo-Ceolin , M. Banner (1) , G. Bassompierre (3) , K. Benslama , N. Besson (2) , I. Bird , B. Blumenfeld , F. Bobisut , J. Bouchez (2) , S. Boyd , A. Bueno , S. Bunyatov , L. Camilleri (4) , A. Cardini , P. W. Cattaneo , V. Cavasinni , A. Cervera-Villanueva (4) , R. Challis , G. Collazuol , G. Conforto (4) , C. Conta , M. Contalbrigo , R. Cousins , D. Daniels , R. Das , H. Degaudenzi , Prete T. Del , Santo A. De (4) , T. Dignan , Lella Luigi Di (4) , Couto E. Silva E. Do (4) , J. Dumarchez (1) , M. Ellis , G. J. Feldman , R. Ferrari , D. Ferrère (4) , V. Flaminio , M. Fraternali , J.M. Gaillard (3) , E. Gangler (1, 4) , A. Geiser (4) , D. Geppert , D. Gibin , S. Gninenko (4) , A. Godley , J.J. Gómez-Cadenas (4) , J. Gosset (2) , C. Gössling , M. Gouanère (3) , A. Grant (4) , G. Graziani (5) , A. M. Guglielmi , C. Hagner (2) , J. Hernando , T. M. Hong , D. Hubbard , P. Hurst , N. Hyett , E. Iacopini (5) , C. Joseph , F. Juget , N. Kent , M. Kirsanov , O. Klimov , J. Kokkonen (4) , A. Kovzelev , A. Krasnoperov (3) , S. Lacaprara , C. Lachaud (1) , B. Lakic , A. Lanza , Rotonda L. La , M. Laveder , A. Letessier-Selvon (1) , J.M. Lévy (1) , L. Linssen (4) , A. Ljubicic , J. Long , A. Lupi (5) , V. V. Lyubushkin , A. Marchionni (5) , F. Martelli , X. Méchain (2) , J.P. Mendiburu (3) , J. P. Meyer (2) , M. Mezzetto , S. R. Mishra , G. F. Moorhead , P. Nédélec (3) , Yu Nefedov , C. Nguyen-Mau , D. Orestano , F. Pastore , L. S. Peak , E. Pennacchio , H. Pessard (3) , R. Petti (4) , A. Placci (4) , G. Polesello , D. Pollmann , A. Polyarush , C. Poulsen , L. Rebuffi , J. Rico , C. Roda (4) , André Rubbia (4) , F. Salvatore , K. Schahmaneche , B. Schmidt (4) , T. Schmidt , A. Sconza , M. Sevior , D. Shih , D. Sillou (3) , F. J. P. Soler (4) , Gabriella Sozzi , D. D. Steele , U. Stiegler (4) , M. Stipcevic , T. Stolarczyk (2) , M. Tareb-Reyes , G. N. Taylor , V. Tereshchenko , A. Toropin , A. M. Touchard (1) , S. N. Tovey (4) , M. T. Tran , Emmanuel Tsesmelis (4) , J. Ulrichs , L. Vacavant , M. Valdata-Nappi , V. Yu Valuev , F. Vannucci (1) , K. E. Varvell , M. Veltri , V. Vercesi , G. Vidal-Sitjes (4) , J. M. Vieira , T. G. Vinogradova , F. V. Weber (4) , T. Weisse , F. F. Wilson (4) , L. J. Winton , B. D. Yabsley , H. Zaccone (2) , K. Zuber , P. Zuccon

1 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
2 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
3 LAPP - Laboratoire d'Annecy de Physique des Particules
4 CERN - European Organization for Nuclear Research
5 INFN, Sezione di Firenze - Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

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).

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

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, 2006, 46, pp.69-79. ⟨10.1140/epjc/s2006-02500-4⟩. ⟨in2p3-00115967⟩