Observation of the decay xi0 --> sigma+ mu- nu(mu)

The xi0 muon semileptonic decay has been observed for the first time with nine identified events using the KTeV beam line and detector at Fermilab. The decay is normalized to the xi0 beta decay mode and yields a value for the ratio of decay rates gamma(xi0 --> sigma+ mu- nu(mu))/gamma(xi0 -->...

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Veröffentlicht in:	Physical review letters 2005-08, Vol.95 (8), p.081801-081801
Hauptverfasser:	Abouzaid, E, Alexopoulos, T, Arenton, M, Barbosa, R F, Barker, A R, Bellantoni, L, Bellavance, A, Blucher, E, Bock, G J, Cheu, E, Coleman, R, Corcoran, M D, Cox, B, Erwin, A R, Escobar, C O, Glazov, A, Golossanov, A, Gomes, R A, Gouffon, P, Hanagaki, K, Hsiung, Y B, Huang, H, Jensen, D A, Kessler, R, Kotera, K, LaDue, J, Ledovskoy, A, McBride, P L, Monnier, E, Nelson, K S, Nguyen, H, Niclasen, R, Ping, H, Prasad, V, Qi, X R, Ramberg, E J, Ray, R E, Ronquest, M, Santos, E, Shields, J, Slater, W, Smith, D, Solomey, N, Swallow, E C, Toale, P A, Tschirhart, R, Velissaris, C, Wah, Y W, Wang, J, White, H B, Whitmore, J, Wilking, M, Winstein, B, Winston, R, Worcester, E T, Worcester, M, Yamanaka, T, Zimmerman, E D, Zukanovich, R F
Format:	Artikel
Sprache:	eng
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Zusammenfassung:	The xi0 muon semileptonic decay has been observed for the first time with nine identified events using the KTeV beam line and detector at Fermilab. The decay is normalized to the xi0 beta decay mode and yields a value for the ratio of decay rates gamma(xi0 --> sigma+ mu- nu(mu))/gamma(xi0 --> sigma+ e- nu(e)) of [1.8(-0.5)(+0.7)(stat) +/- 0.2(syst)] x 10(-2). This is in agreement with the SU(3) flavor symmetric quark model.
ISSN:	0031-9007