ITA
ENG

Observation of the decay Xi(0)->Sigma(+)e(-)(nu)over-bar-(e)

Authors

Affolder, A Alavi-Harati, A Albuquerque, IF Alexopoulos, T Arenton, M Arisaka, K Averitte, S Barker, AR Bellantoni, L Bellavance, A Belz, J Ben-David, R Bergman, DR Blucher, E Bock, GJ Bown, C Bright, S Cheu, E Childress, S Coleman, R Corcoran, MD Corti, G Cox, B Crisler, MB Erwin, AR Ford, R Golossanov, A Graham, G Graham, J Hagan, K Halkiadakis, E Hanagaki, K Hidaka, S Hsiung, YB Jejer, V Jennings, J Jensen, DA Kessler, R Kobrak, HGE LaDue, J Lath, A Ledovskoy, A McBride, PL McManus, AP Mikelsons, P Monnier, E Nakaya, T Nauenberg, U Nelson, KS Nguyen, H O'Dell, V Pang, M Pordes, R Prasad, V Qiao, C Quinn, B Ramberg, EJ Ray, RE Roodman, A Sadamoto, M Schnetzer, S Senyo, K Shanahan, P Shawhan, PS Slater, W Solomey, N Somalwar, SV Stone, RL Suzuki, I Swallow, EC Swanson, RA Taegar, SA Tesarek, RJ Thomson, GB Toale, PA Tripathi, A Tschirhart, R Wah, YW Wang, J White, HB Whitmore, J Winstein, B Winston, R Wu, JY Yamanaka, T Zimmerman, ED

Citation

A. Affolder et al., Observation of the decay Xi(0)->Sigma(+)e(-)(nu)over-bar-(e), PHYS REV L, 82(19), 1999, pp. 3751-3754

Citations number

Categorie Soggetti

Physics

Journal title

PHYSICAL REVIEW LETTERS

ISSN journal

00319007 → ACNP

Volume

Issue

Year of publication

1999

Pages

3751 - 3754

Database

ISI

SICI code

0031-9007(19990510)82:19<3751:OOTDX>2.0.ZU;2-L

Abstract

We present the first observation of Xi(0) beta decay, using the KTeV beam l ine and detector at Fermilab. We have identified 176 beta decay events afte r subtracting a 7 event background. Normalization to 41024 simultaneously c ollected Xi(0) --> Lambda(0)pi(0) decays yields a branching ratio of Gamma( Xi(0) --> Sigma(+) e(-)<(nu)over bar>(e))/Gamma(total) = (2.71 +/- 0.22(sta tistical) +/- 0.31(systematic)) X 10(-4). The flavor symmetric quark model calculation agrees with this result.