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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1994, vol. 325, p. 257-262

Observation ofΛc + decays to Λπ+π0, Σ0π+, Σ0π+π0, and Σ0π-π+π+

Avery P., Freyberger A., Rodriguez J., Stephens R., Yelton J., Cinabro D., Henderson S., Kinoshita K., Liu T., Saulnier M., Shen F., Wilson R., Yamamoto H., Ong B., Selen M., Sadoff A. J., Ammar R., Ball S., Baringer P., Coppage D., Copty N., Davis R., Hancock N., Kelly M., Kwak N., Lam H., Kubota Y., Lattery M., Nelson J. K., Patton S., Perticone D., Poling R., Savinov V., Schrenk S., Wang R., Alam M. S., Kim I. J., Nemati B., O'Neill J. J., Severini H., Sun C. R., Zoeller M. M., Crawford G., Daubenmier C. M., Fulton R., Fujino D., Gan K. K., Honscheid K., Kagan H., Kass R., Lee J., Malchow R., Morrow F., Skovpen Y., Sung M., White C., Whitmore J., Wilson P., Butler F., Fu X., Kalbfleisch G., Lambrecht M., Ross W. R., Skubic P., Snow J., Wang P. L., Wood M., Bortoletto D., Brown D. N., Fast J., McIlwain R. L., Miao T., Miller D. H., Modesitt M., Schaffner S. F., Shibata E. I., Shipsey I. P J, Wang P. N., Battle M., Ernst J., Kroha H., Roberts S., Sparks K., Thorndike E. H., Wang C. H., Dominick J., Sanghera S., Shelkov V., Skwarnicki T., Stroynowski R., Volobouev I., Zadorozhny P., Artuso M., He D., Goldberg M., Horwitz N., Kennett R., Moneti G. C., Muheim F., Mukhin Y.

We have observed the previously unseen decay modes Λπ+π0, Σ0π+π0 and Σ0π-π+π+ of the charmed baryon Λc +, as well as Λc +→Σ0π+ observed previously by ARGUS. The branching ratios for these four decay modes relative to Λc +→pK-π+ are measured to be 0.73 ±0.09± 0.16, 0.36 ±0.09±0.10, 0.21±0.05±0.05, and 0.21±0.02 ±0.04, respectively. Using the recent CLEO measurement of the branching ratio for Λc +→pK- π+, these modes account for 6% of Λc + decays. © 1994.