Charged kaon production in tau decays at LEP

• Published in: Physics letters. B Vol. 334; no. 3; pp. 435 - 449
• Main Authors: Abreu, P., Aleksan, R., Almehed, S., Alvsvaag, S.J., Amaldi, U., Åsman, B., Bartl, W., Berggren, M., Bertrand, D., Bjarne, J., Bocci, V., Bogolubov, P.N., Bosworth, S., Brand, K.D., Bruckman, P., Buran, T., Cankocak, K., Carrilho, P., Cases, R., Caso, C., Maestro, J.Cuevas, Dahm, J., De Brabandere, S., Dijkstra, H., Dufour, Y., Ekelof, T., Ferrer, A., Firestone, A., Francon, S., Frodesen, A.G., Fruhwirth, R., Gaspar, C., Gavillet, Ph, Gele, D., Giacomelli, P., Gorski, M., Grard, F., Hallgren, A., Hedberg, V., Hernando, J.A., Hessing, T.L., Hilke, H.J., Honore, P.F., Huet, K., Iversen, P-S., Jackson, J.N., Johansson, E.K., Juillot, P., Karvelas, E., Kluit, P., Kostioukhine, V., Kouznetsov, O., Krolikowski, J., Kucewicz, W., Marco, J., Marechal, B., Margoni, M., Mariotti, C., Markou, A., Maron, T., Matteuzzi, C., Meroni, C., Mikulec, I., Naraghi, F., Pennanen, J., Peralta, L., Pierre, F., Poropat, P., Prest, M., Privitera, P., Radojicic, D., Ratoff, P.N., Read, A.L., Reale, M., Reid, D., Ridky, J., Romero, A., Rosso, E., Ruckstuhl, W., Rybin, A., Sekulin, R., Simonetto, F., Sosnowski, R., Stanescu, C., Tabarelli, T., Todorov, T., Tortora, L., Transtromer, G., Trischuk, W., Van Der Heijden, M., Van Doninck, W.K., Vitale, L., Vollmer, M., Wahlen, H., Walck, C., Weierstall, M., Wetherell, A.M., Wilkinson, G.R., Witek, M., Zumerle, G.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 18.08.1994; Elsevier Science; Elsevier
• Subjects: Exact sciences and technology; Hadron-induced high- and super-high-energy interactions (energy > 10 gev); High Energy Physics - Experiment; Inclusive production with identified leptons, photons, or other nonhadronic particles; Physics; Specific reactions and phenomenology; The physics of elementary particles and fields; Kaons; Branching ratio; Particle production; Particle decay; Detectors; Elementary particles; Mass distribution; Charged particles
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(94)90711-0

Kaon production in one prong tau decays has been studied using data collected with the DELPHI detector at the LEP collider. Charged kaons were identified over a large momentum range by the DELPHI barrel Ring Imaging Cherenkov detector. The following branching ratios have been determined: BR( τ→ Kν τ )=(0.85±0.18)%, BR( τ→ Kν τ ≥0 neutrals)=(1.54±0.24)%, BR( τ→ Kν τ ≥1 neutrals)=(0.69±0.25)%. The result for the exclusive branching ratio is consistent with the Standard Model prediction based on τ- μ- e universality. In addition, tau decay into K ∗− was studied in the channel K ∗−→K −π 0 . The result BR(τ→K ∗−ν τ)× BR(K ∗−→K −π 0)=(0.57±0.23)% was obtained.