Details

Autor(en) / Beteiligte

• Chistov, R.
• Aushev, T.
• Balagura, V.
• Danilov, M.
• Liventsev, D.
• Mizuk, R.
• Pakhlov, P.
• Pakhlova, G.
• Tikhomirov, I.
• Uglov, T.
• Abe, K.
• Adachi, I.
• Dragic, J.
• Gershon, T.
• Haba, J.
• Hazumi, M.
• Itoh, R.
• Iwasaki, Y.
• Katayama, N.
• Kichimi, H.

Titel

Observation of New States Decaying into {lambda}{sub c}{sup +}K{sup -}{pi}{sup +} and {lambda}{sub c}{sup +}K{sub S}{sup 0}{pi}{sup -}

Ist Teil von

• Physical review letters, 2006-10, Vol.97 (16)

Ort / Verlag

United States

Erscheinungsjahr

2006

Quelle

PROLA

Beschreibungen/Notizen

• We report the first observation of two charmed strange baryons that decay into {lambda}{sub c}{sup +}K{sup -}{pi}{sup +}. The broader of the two states is measured to have a mass of 2978.5{+-}2.1{+-}2.0 MeV/c{sup 2} and a width of 43.5{+-}7.5{+-}7.0 MeV/c{sup 2}. The mass and width of the narrow state are measured to be 3076.7{+-}0.9{+-}0.5 MeV/c{sup 2} and 6.2{+-}1.2{+-}0.8 MeV/c{sup 2}, respectively. We also perform a search for the isospin partner states that decay into {lambda}{sub c}{sup +}K{sub S}{sup 0}{pi}{sup -} and observe a significant signal at the mass of 3082.8{+-}1.8{+-}1.5 MeV/c{sup 2}. The data used for this analysis were accumulated at or near the {upsilon}(4S) resonance, using the Belle detector at the e{sup +}e{sup -} asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5 fb{sup -1}.