First observation and measurement of the resonant structure of the Λb0 → Λc+ π-π+π- decay mode

The authors present the first observation of the Λb0 → Λc+π-π+π- decay using data from an integrated luminosity of approximately 2.4 fb-1 of p(bar p) collisions at √s = 1.96 TeV, collected with the CDF II detector at the Fermilab Tevatron. They also present the first observation of the resonant decays Λb0 → Σc(2455)0 π+π- → Λc+π-π+π-, Λb0 → Σc(2455)++π-π- → Λc+π-π+π-, Λb0 → Λc(2595)+π- → Λc+π-π+π- and Λb0 → Λc(2625)+π- → Λc+π-π+π-, and measure their relative branching ratios.