Observation of new states decaying into Lambda K-c(-)pi(+) and Lambda K-+(c)S(0)pi(-)

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Observation of new states decaying into Lambda K-c(-)pi(+) and Lambda K-+(c)S(0)pi(-)

Chistov, R; Abe, K; Abe, K; Adachi, I; Aihara, H; Anipko, D; Aulchenko, V; ... Belle Collaboration; + view all (2006) Observation of new states decaying into Lambda K-c(-)pi(+) and Lambda K-+(c)S(0)pi(-). PHYS REV LETT , 97 (16) , Article 162001. 10.1103/PhysRevLett.97.162001. Green open access

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Abstract

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

Type:	Article
Title:	Observation of new states decaying into Lambda K-c(-)pi(+) and Lambda K-+(c)S(0)pi(-)
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1103/PhysRevLett.97.162001
Publisher version:	http://dx.doi.org/10.1103/PhysRevLett.97.162001
Language:	English
Additional information:	© 2006 The American Physical Society
Keywords:	OCTET QUARKONIA PRODUCTION, CHARMED BARYON, MODEL, SPECTROSCOPY, LAMBDA(+)(C), TEVATRON, SYMMETRY, MASS
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI:	https://discovery.ucl.ac.uk/id/eprint/1308520

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