First Observation of the Cabibbo-suppressed Decays Xi_c+ -> Sigma+ pi- pi+ and Xi_c+ -> Sigma- pi+ pi+ and Measurement of their Branching Ratios
| dc.creator | SELEX Collaboration | |
| dc.creator | Vazquez-Jauregui, E. | |
| dc.creator | Engelfried, J. | |
| dc.date | 2008-04-15 | |
| dc.date | 2008-07-28 | |
| dc.date.accessioned | 2026-07-07T11:49:51Z | |
| dc.date.available | 2026-07-07T11:49:51Z | |
| dc.description | We report the first observation of two Cabibbo-suppressed decay modes, Xi_c+ -> Sigma+ pi- pi+ and Xi_c+ -> Sigma- pi+ pi+. We observe 59+/-14 over a background of 87, and 22+/-8 over a background of 13 events, respectively, for the signals. The data were accumulated using the SELEX spectrometer during the 1996-1997 fixed target run at Fermilab, chiefly from a 600GeV/c Sigma- beam. The branching ratios of the decays relative to the Cabibbo--favored Xi_c+ -> Xi- pi+ pi+ are measured to be B(Xi_c+ -> Sigma+ pi- pi+)/B(Xi_c+ -> Xi- pi+ pi+) = 0.48+/-0.20, and B(Xi_c+ -> Sigma- pi+ pi+)/B(Xi_c+ -> Xi- pi+ pi+) = 0.18+/-0.09, respectively. We also report branching ratios for the same decay modes of the Lambda_c+ relative to Lambda_c+ -> p K- pi+. | |
| dc.description | 15 pages, 5 figures, version 2 as accepted in PLB | |
| dc.identifier | https://arxiv.org/abs/0804.2298 | |
| dc.identifier | http://arxiv.org/abs/0804.2298 | |
| dc.identifier | Phys.Lett.B666:299-304,2008 | |
| dc.identifier | doi:10.1016/j.physletb.2008.07.072 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/203381 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | First Observation of the Cabibbo-suppressed Decays Xi_c+ -> Sigma+ pi- pi+ and Xi_c+ -> Sigma- pi+ pi+ and Measurement of their Branching Ratios | |
| dc.type | text |